CN108896907B - Switching-on and switching-off time testing device and method for double-break circuit breaker - Google Patents
Switching-on and switching-off time testing device and method for double-break circuit breaker Download PDFInfo
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- CN108896907B CN108896907B CN201810980887.3A CN201810980887A CN108896907B CN 108896907 B CN108896907 B CN 108896907B CN 201810980887 A CN201810980887 A CN 201810980887A CN 108896907 B CN108896907 B CN 108896907B
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
Abstract
The embodiment of the application discloses a switching-on/off time testing device and method of a double-break circuit breaker. The device comprises: the system comprises a grounding wire, a signal transmitter, a first signal receiver, a second signal receiver, a third signal receiver, a fourth signal receiver and an oscilloscope; the ground wire is connected with a common point of the two fractures and the ground network, the signal transmitter is arranged on the ground wire, the first signal receiver is arranged on the first ground knife lead wire, the second signal receiver is arranged on the second ground knife lead wire, the third signal receiver is arranged on the opening coil, the fourth signal receiver is arranged on the closing coil, the oscilloscope is connected with the four signal receivers and used for displaying waveforms of signals of the four signal receivers, and the opening time and the closing time are determined by starting and stopping time of the waveforms. By adopting the device or the method, the opening time and the closing time can be measured under the condition that the two ends of the double-break breaker are grounded, so that the condition that induction electricity possibly exists during measurement hurts operators is avoided, and the operation risk is reduced.
Description
Technical Field
The application relates to the field of electrical tests, in particular to a switching-on and switching-off time testing device and method of a double-break circuit breaker.
Background
The high-voltage circuit breaker plays a role in control and protection in a high-voltage circuit of a power system, and is one of important related devices in the power system. The high-voltage circuit breaker not only can cut off or close the no-load current and the load current in a high-voltage circuit contained in the power system, but also can cut off or close the fault current when the power system fails, and can automatically open and automatically reclose when short-circuit faults (or other abnormal running states such as under-voltage, over-current and the like) occur.
The double-break circuit breaker is one of high-voltage circuit breakers, wherein the double-break circuit breaker is provided with two breaks, has stronger arc extinguishing capability, and is more suitable for high-voltage power systems of 220KV and above. The opening time and closing time of the double-break circuit breaker affect the accurate control and protection force of the high-voltage power system, so that the opening time and closing time of the double-break circuit breaker need to be measured.
The existing double-break breaker testing device consists of a switching-on/off controller, a switching-off coil secondary terminal and the like. When the break-in time is measured, the break-in controller sends a break-in instruction, the secondary terminal of the break-in coil controls one break in the double-break breaker to break according to the break-in instruction after receiving the break-in instruction sent by the break-in controller, and meanwhile transmits a break signal of the break to the break-in controller, and the break-in controller takes the difference between the time of receiving the break signal of the break and the time of sending the break-in instruction as the break-in time of the break after receiving the break signal of the break. When the closing time is measured, the opening and closing controller sends a closing instruction, the secondary terminal of the opening and closing coil controls one fracture in the double-fracture breaker to be closed according to the closing instruction after receiving the closing instruction sent by the opening and closing controller, and meanwhile, the opening and closing controller transmits a closing signal of the fracture to the opening and closing controller, and after receiving the closing signal of the fracture, the opening and closing controller takes the difference between the time of receiving the closing signal of the fracture and the time of sending the closing instruction as the closing time of the fracture.
However, in the process of measuring the opening time and closing time of the double-break circuit breaker, the charged equipment beside the double-break circuit breaker is affected to generate induced electricity, and the induced electricity can cause harm to operators, so that the operation risk is increased. In order to prevent the charged equipment beside the double-break breaker from generating induced electricity, the ground knives on two sides of the double-break breaker are usually pulled up, or the ground knives on one side are pulled up, and the ground wire is hung on the other side, so that the two ends of the double-break breaker are grounded, but when the two ends of the double-break breaker are grounded, the two ends of the double-break are connected, and under the condition, the existing double-break breaker testing device cannot effectively measure the opening time and closing time of each break of the double-break breaker.
Because the existing device and method for measuring the opening time and closing time of the double-break circuit breaker cannot measure under the condition that the two ends of the double-break circuit breaker are grounded, a scheme for measuring the opening time and closing time under the condition that the two ends of the double-break circuit breaker are grounded is needed.
Disclosure of Invention
The embodiment of the application provides a switching-on/off time testing device and method of a double-break circuit breaker, which are used for solving the problem that in the prior art, switching-on/off time cannot be effectively measured under the condition that two ends of the double-break circuit breaker are grounded.
In a first aspect, an embodiment of the present application provides a switching time testing device for a double-break circuit breaker, where the device includes: the system comprises a grounding wire, a signal transmitter, a first signal receiver, a second signal receiver, a third signal receiver, a fourth signal receiver and an oscilloscope;
the earth connection is connected with a common point and an earth screen of two fractures in the double-fracture circuit breaker, the earth connection is used for respectively forming two loops for the two fractures of the double-fracture circuit breaker, and the two fractures comprise: a first fracture and a second fracture, the two circuits comprising: a first circuit and a second circuit;
the signal transmitter is arranged on the grounding wire and is used for transmitting current signals to the first signal receiver and the second signal receiver;
the first signal receiver is arranged on a first ground knife lead at a first fracture side in the double-fracture breaker, is connected with the oscilloscope and is used for receiving a current signal sent by the signal transmitter;
the second signal receiver is arranged on a second ground knife lead at a second fracture side in the double-fracture breaker, the second signal receiver is connected with the oscilloscope, and the second signal receiver is used for receiving a current signal sent by the signal transmitter;
the third signal receiver is arranged on a brake separating coil in the double-break circuit breaker, the third signal receiver is connected with the oscilloscope, when the brake separating coil is electrified, the third signal receiver is used for receiving an electrified signal of the brake separating coil;
the fourth signal receiver is arranged on a closing coil in the double-break circuit breaker, the fourth signal connector is connected with the oscilloscope, when the two-break circuit breaker is closed, the closing coil is electrified, and the fourth signal receiver is used for receiving an electrified signal of the closing coil;
the oscillograph is used for displaying waveforms of signals of the first signal receiver, the second signal receiver, the third signal receiver and the fourth signal receiver, and the starting and stopping time of the waveform interruption or the continuous starting and stopping time is used for determining the opening time and the closing time.
With reference to the first aspect, in one implementation manner, two ends of the grounding wire are conductive metal clips, one end of the grounding wire is connected to a common point of two breaks of the double-break circuit breaker, and the other end of the grounding wire is connected to the grounding grid.
With reference to the first aspect, in one implementation manner, a first fracture, a first ground knife, a ground net and the ground wire of the double-fracture circuit breaker form a first loop, and the first ground knife is located at one side of the first fracture and is used for controlling the grounding of the first fracture;
the second circuit is formed by a second fracture, a second grounding knife, a grounding net and the grounding wire of the double-fracture circuit breaker, and the second grounding knife is positioned on one side of the second fracture and used for controlling the grounding of the second fracture.
With reference to the first aspect, in one implementation manner, the opening time and the closing time include: the first fracture opening time, the second fracture opening time, the first fracture closing time and the second fracture closing time.
With reference to the first aspect, in one implementation manner, a difference between a start time of a first waveform displayed in the oscilloscope and a termination time of a second waveform displayed in the oscilloscope is the first fracture opening time;
the difference between the starting time of the first waveform displayed in the oscilloscope and the ending time of the third waveform displayed in the oscilloscope is the second fracture opening time;
the first waveform is a waveform of a switching-off coil energizing signal of the third signal receiver, the second waveform is a waveform of a current signal of a first fracture received by the first signal receiver, and the third waveform is a waveform of a current signal of a second fracture received by the second signal receiver;
the difference between the starting time of the fourth waveform displayed in the oscilloscope and the starting time of the fifth waveform displayed in the oscilloscope is the closing time of the first fracture;
the difference between the starting time of the fourth waveform displayed in the oscilloscope and the starting time of the sixth waveform displayed in the oscilloscope is the closing time of the second fracture;
the fourth waveform is a waveform of a closing coil energizing signal of the fourth signal receiver, the fifth waveform is a waveform of a current signal of the first fracture received by the first signal receiver, and the sixth waveform is a waveform of a current signal of the second fracture received by the second signal receiver.
In a second aspect, an embodiment of the present application provides, in part, a method for testing opening and closing time of a double-break breaker, where the method for testing opening and closing time of the double-break breaker is applied to the device for testing opening and closing time of the double-break breaker, and the method for testing opening and closing time of the double-break breaker includes:
when the switch-off is performed, the switch-off coil is electrified, and the third signal receiver receives an electrified signal of the switch-off coil;
displaying the waveform of the energizing signal of the switching-off coil received by the third signal receiver on an oscilloscope;
according to the energizing condition of the opening coil, the two fractures are respectively disconnected;
the current signals sent by the signal transmitter flow to the two fractures respectively;
the first signal receiver receives the current signal of the first fracture, and the second signal receiver receives the current signal of the second fracture;
the oscillograph displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
determining a brake separating time according to the start-stop time of the waveform interruption or the continuous start-stop time;
when the switch-on is performed, the switch-on coil is electrified, and a fourth signal receiver receives an electrified signal of the switch-on coil;
displaying the waveform of the energizing signal of the closing coil received by the fourth signal receiver on the oscilloscope;
according to the energizing condition of the closing coil, the two fractures are respectively closed;
the current signals sent by the signal transmitter flow to the two fractures respectively;
the first signal receiver receives the current signal of the first fracture, and the second signal receiver receives the current signal of the second fracture;
the oscillograph displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
and determining the closing time according to the starting and stopping time of the waveform interruption or the continuous starting and stopping time.
With reference to the second aspect, in one implementation manner, when the disconnection is required, a difference between a start time of a waveform of an energizing signal of the disconnection coil received by the third signal receiver displayed by the oscilloscope and a termination time of a waveform of a current of the first fracture received by the first signal receiver displayed by the oscilloscope is the first fracture disconnection time;
and the difference between the starting time of the waveform of the energizing signal of the opening coil received by the third signal receiver displayed by the oscilloscope and the ending time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the opening time of the second fracture.
With reference to the second aspect, in one implementation manner, when the switch is closed, a difference between a start time of a waveform of an energizing signal of the switch-on coil received by the fourth signal receiver displayed by the oscilloscope and a start time of a waveform of a current signal of the first fracture received by the first signal receiver displayed by the oscilloscope is the first fracture switch-on time;
and the difference between the starting time of the waveform of the energizing signal of the closing coil received by the fourth signal receiver displayed by the oscilloscope and the starting time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the closing time of the second fracture.
According to the technical scheme, the switching-on/off time testing device and the switching-on/off time testing method for the double-break circuit breaker are provided. Wherein, divide closing test device includes: the system comprises a grounding wire, a signal transmitter, a first signal receiver, a second signal receiver, a third signal receiver, a fourth signal receiver and an oscilloscope; the grounding wire is connected with a common point and a grounding network of two fractures in the double-fracture breaker and is used for dividing the two fractures into two loops, the signal transmitter is arranged on the grounding wire and is used for transmitting current signals, the first signal receiver is arranged on a first grounding knife lead at the first fracture side and is connected with the oscilloscope and is used for receiving the current signals transmitted by the signal transmitter, the second signal receiver is arranged on a second grounding knife lead at the second fracture side and is connected with the oscilloscope and is used for receiving the current signals transmitted by the signal transmitter, the third signal receiver is arranged on the opening coil and is connected with the oscilloscope and is used for receiving the current signals of the opening coil, the fourth signal receiver is arranged on the closing coil and is connected with the oscilloscope and is used for receiving the current signals of the closing coil, and the oscilloscopes are used for displaying waveforms of signals of the first signal receiver, the second signal receiver, the third signal receiver and the fourth signal receiver, and the waveform or continuous starting time and stopping time of the opening are used for determining opening time and closing time.
By adopting the switching-on and switching-off time testing device of the double-break circuit breaker, the switching-on and switching-off time of the double-break circuit breaker can be measured under the condition that the two ends of the double-break circuit breaker are grounded, and in the measuring process, the two ends of the double-break circuit breaker are grounded, so that the condition that operators are injured by induced electricity during measurement is avoided, and the operation risk is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a switching-on/off time testing device of a double-break circuit breaker according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of measuring opening time in an opening and closing time test method of a double-opening circuit breaker;
fig. 3 is a schematic flow chart of measuring closing time in a method for testing closing and opening time of a double-opening circuit breaker.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
The embodiment of the application provides a switching-on/off time testing device and method of a double-break circuit breaker, which are used for solving the problem that in the prior art, switching-on/off time cannot be effectively measured under the condition that two ends of the double-break circuit breaker are grounded.
The embodiment of the application discloses a switching-on/off time testing device of a double-break breaker, which refers to a structural schematic diagram shown in fig. 1 and specifically comprises the following structures:
the switching-on/off time testing device of the double-break circuit breaker comprises: a ground line 101, a signal transmitter 102, a first signal receiver 103, a second signal receiver 104, a third signal receiver 105, a fourth signal receiver 106, and an oscilloscope 107;
the ground wire 101 is connected with a common point and a ground network of two breaks in the double-break circuit breaker, the ground wire 101 is used for respectively forming two loops for the two breaks of the double-break circuit breaker, and the two breaks comprise: a first fracture and a second fracture, the two circuits comprising: a first circuit and a second circuit;
the length of the grounding wire 101 is determined according to the distance between the common point of the two fractures and the ground network, and since both sides of the double-fracture circuit breaker are grounded in the embodiment, the grounding wire 101 is used for separating the two fractures of the double-fracture circuit breaker to form two loops respectively;
the ground wire 101 is a common edge of two loops, so that the opening time and closing time of each fracture can be measured independently; meanwhile, each loop is grounded at two ends during measurement, so that the measuring is safer for operators, and the measuring is not influenced by induction electricity possibly generated by surrounding electrified equipment.
The signal transmitter 102 is disposed on the ground line 101, and the signal transmitter 102 is configured to transmit a current signal to the first signal receiver 103 and the second signal receiver 104;
under the condition of closing, the current signal is always on, when the opening is carried out again, the interruption of the current signal represents that the opening is finished, and when the closing is carried out again, the current signal is turned on again, which represents that the closing is finished.
In this embodiment, the signal transmitter 102 is hung on the ground wire 101, and since the ground wire 101 is a common edge of two loops, it can be ensured that the signal transmitter 102 transmits current signals of two breaks simultaneously; when the switch is required to be opened, the signal transmitter 102 simultaneously sends out a current signal of the first loop and a current signal of the second loop, namely, the signal transmitter 102 simultaneously sends out a current signal of the first fracture and a current signal of the second fracture; when the switch needs to be closed, the signal transmitter 102 simultaneously sends out the current signal of the first loop and the current signal of the second loop, that is, the signal transmitter 102 simultaneously sends out the current signal of the first fracture and the current signal of the second fracture, and the purpose that the signal transmitter 102 simultaneously sends out the current signals of the two fractures is to accurately calculate different periods of time.
The first signal receiver 103 is arranged on a first ground knife lead at a first fracture side in the double-fracture breaker, the first signal receiver 103 is connected with the oscilloscope 107, and the first signal receiver 103 is used for receiving a current signal sent by the signal transmitter 102;
the first signal receiver 103 is arranged at one side of the first loop, the other end of the first signal receiver 103 is connected with the oscilloscope 107, when the opening is needed, the first signal receiver 103 receives a current signal of a first fracture sent by the signal transmitter 102, and meanwhile, the oscilloscope 107 displays the waveform of the current signal; when the switch needs to be closed, the first signal receiver 103 receives the current signal of the first fracture sent by the signal transmitter 102, meanwhile, the oscillograph 107 displays the waveform of the current signal, and the first signal receiver 103 can receive the current signal of the first loop at the first time and display the waveform in the oscillograph 107.
The second signal receiver 104 is arranged on a second ground knife lead at a second fracture side in the double-fracture breaker, the second signal receiver 104 is connected with the oscilloscope 107, and the second signal receiver 104 is used for receiving a current signal sent by the signal transmitter 102;
the second signal receiver 104 is disposed at one side of the second loop, the other end of the second signal receiver is connected with the oscilloscope 107, when the second signal receiver 104 needs to be opened, the second signal receiver 104 receives the current signal of the second fracture sent by the signal transmitter 102, and meanwhile, the oscilloscope 107 displays the waveform of the current signal; when the switch needs to be closed, the second signal receiver 104 receives the current signal of the second fracture sent by the signal transmitter 102, meanwhile, the oscillograph 107 displays the waveform of the current signal, and the second signal receiver 104 can receive the current signal of the second loop at the first time and display the waveform in the oscillograph 107.
The third signal receiver 105 is arranged on a brake separating coil in the double-break breaker, the third signal receiver 105 is connected with the oscilloscope 107, when brake separating is needed, the brake separating coil is electrified, and the third signal receiver 105 is used for receiving an electrified signal of the brake separating coil;
the third signal receiver 105 is arranged on a brake separating coil of the double-break breaker, and the other end of the third signal receiver is connected with the oscilloscope 107; when the double-break breaker is disconnected, the disconnection coil starts to be electrified, and a third signal receiver 105 connected with the disconnection coil receives a disconnection coil electrifying signal;
meanwhile, the oscillograph 107 displays the waveform of the switching-off coil power-on signal, and the starting time of the waveform of the switching-off coil power-on signal displayed by the oscillograph 107 is the starting time of switching off the first fracture and the second fracture.
The fourth signal receiver 106 is arranged on a closing coil in the double-break circuit breaker, the fourth signal receiver 106 is connected with the oscilloscope 107, when a closing is needed, the closing coil is electrified, and the fourth signal receiver 106 is used for receiving an electrified signal of the closing coil;
the fourth signal receiver 106 is arranged on a closing coil of the double-break circuit breaker, and the other end of the fourth signal receiver is connected with the oscilloscope 107; when the double-break circuit breaker is switched on, the switching-on coil starts to be electrified, and a fourth signal receiver 106 connected with the switching-on coil receives a switching-on coil electrifying signal;
meanwhile, the oscillograph 107 displays the waveform of the switching-on coil power-on signal, and the starting time of the waveform of the switching-on coil power-on signal displayed by the oscillograph 107 is the starting time of switching on the first fracture and the second fracture.
The oscilloscope 107 is connected with four signal receivers, and is used for displaying waveforms of signals of the first signal receiver 103, the second signal receiver 104, the third signal receiver 105 and the fourth signal receiver 106, and the start-stop time of the waveform interruption or the continuous start-stop time is used for determining the opening time and the closing time.
The operator reads the interruption or continuous start-stop time of the waveform displayed by the oscilloscope 107, and can calculate the opening time and closing time according to the interruption or continuous start-stop time of the waveform.
In addition, the oscilloscope 107 in the embodiment may be a common oscilloscope 107, or may be another multifunctional oscilloscope 107, for example, the opening time and the closing time may be read and automatically calculated, which is not limited in this application.
The utility model provides a divide-shut brake time testing arrangement of double-break circuit breaker includes: a ground line 101, a signal transmitter 102, a first signal receiver 103, a second signal receiver 104, a third signal receiver 105, a fourth signal receiver 106, and an oscilloscope 107; the grounding wire 101 is connected with a common point and a grounding network of two fractures in the double-fracture breaker, and is used for dividing the two fractures into two loops, the signal transmitter 102 is arranged on the grounding wire 101 and is used for transmitting current signals, the first signal receiver 103 is arranged on a first grounding knife lead at the first fracture side and is simultaneously connected with the oscilloscope 107 and is used for receiving the current signals transmitted by the signal transmitter 102, the second signal receiver 104 is arranged on a second grounding knife lead at the second fracture side and is simultaneously connected with the oscilloscope 107 and is used for receiving the current signals transmitted by the signal transmitter 102, the third signal receiver 105 is arranged on the brake-separating coil and is simultaneously connected with the oscilloscope 107 and is used for receiving the energizing signals of the brake-separating coil, the fourth signal receiver 106 is arranged on the brake-closing coil and is simultaneously connected with the oscilloscope 107 and is used for receiving the energizing signals of the brake-closing coil, and the oscilloscopes 107 are used for displaying the continuous time waveforms of the first signal receiver 103, the second signal receiver 104, the third signal receiver 105 and the fourth signal receiver 106 and the time waveform of the brake-closing coil are used for determining the continuous time waveform of the time of the brake-separating and the brake.
By adopting the switching-on and switching-off time testing device of the double-break circuit breaker, the switching-on and switching-off time of the double-break circuit breaker can be measured under the condition that the two ends of the double-break circuit breaker are grounded, and in the measuring process, the two ends of the double-break circuit breaker are grounded, so that induced electricity can not be generated in the measuring process, the condition that operators are injured by the induced electricity during the measuring process is avoided, and the operation risk is reduced.
Further, in the embodiment of the present application, the two ends of the grounding wire 101 are conductive metal clips, one end is connected to a common point of two breaks of the double-break circuit breaker, and the other end is connected to the ground network.
The two ends of the ground wire 101 are conductive metal clips, preferably copper clips, but may be other metal clips with better conductivity, such as copper-plated clips, stainless steel clips, iron clips, and the like.
Further, in the embodiment of the present application, the first fracture, the first ground blade, the ground net and the ground wire 101 of the double-fracture circuit breaker form a first loop, where the first ground blade is located at one side of the first fracture and is used for controlling the grounding of the first fracture;
the second break, the second grounding knife, the grounding net and the grounding wire 101 of the double-break circuit breaker form a second loop, and the second grounding knife is located at one side of the second break and is used for controlling the grounding of the second break.
The grounding wire 101 divides the two breaks into two loops by a grounding knife and a grounding grid at the sides of the two breaks, so that the opening and closing time of each break can be conveniently measured.
Further, the opening time and the closing time include: the first fracture opening time, the second fracture opening time, the first fracture closing time and the second fracture closing time.
Wherein a difference between a start time of a first waveform displayed in the oscilloscope 107 and a stop time of a second waveform displayed in the oscilloscope 107 is the first fracture opening time;
the difference between the start time of the first waveform displayed in the oscilloscope 107 and the end time of the third waveform displayed in the oscilloscope 107 is the second fracture opening time;
the first waveform is a waveform of a switching-off coil energizing signal of the third signal receiver 105, the second waveform is a waveform of a current signal of the first fracture received by the first signal receiver 103, and the third waveform is a waveform of a current signal of the second fracture received by the second signal receiver 104;
the difference between the start time of the fourth waveform displayed in the oscilloscope 107 and the start time of the fifth waveform displayed in the oscilloscope 107 is the first break closing time;
the difference between the start time of the fourth waveform displayed in the oscilloscope 107 and the start time of the sixth waveform displayed in the oscilloscope 107 is the second fracture closing time;
the fourth waveform is a waveform of a closing coil energizing signal of the fourth signal receiver 106, the fifth waveform is a waveform of a current signal of the first fracture received by the first signal receiver 103, and the sixth waveform is a waveform of a current signal of the second fracture received by the second signal receiver 104.
In this embodiment, the opening and closing time of the two breaks is specifically described, and when the break is performed, the difference between the starting time of the waveform of the energizing signal of the break coil received by the third signal receiver 105 displayed by the oscilloscope 107 and the ending time of the waveform of the current signal of the first break received by the first signal receiver 103 displayed by the oscilloscope 107 is the break opening time of the first break;
the difference between the start time of the waveform of the energizing signal of the opening coil received by the third signal receiver 105 displayed by the oscilloscope 107 and the end time of the waveform of the current signal of the second break received by the second signal receiver 104 displayed by the oscilloscope 107 is the opening time of the second break;
when the switch is closed, a difference between a start time of a waveform of an energizing signal of the switch-on coil received by the fourth signal receiver 106 displayed by the oscilloscope 107 and a start time of a waveform of a current signal of the first break received by the first signal receiver 103 displayed by the oscilloscope 107 is the first break switch-on time;
the difference between the start time of the waveform of the energizing signal of the closing coil received by the fourth signal receiver 106 displayed by the oscilloscope 107 and the start time of the waveform of the current signal of the second break received by the second signal receiver 104 displayed by the oscilloscope 107 is the closing time of the second break.
The opening and closing time testing device of the double-break circuit breaker can specifically obtain the opening and closing time of each break.
The embodiment of the application also provides a switching-on/off time testing method of the double-break circuit breaker, which is applied to the switching-on/off time testing device of the double-break circuit breaker, and comprises the following steps:
referring to fig. 2, a workflow diagram of a switching-off method in a switching-on/off time test method of a double-break circuit breaker includes:
step 201, when the brake is opened, the brake opening coil is electrified, and the third signal receiver receives an electrified signal of the brake opening coil;
step 202, displaying the waveform of the energizing signal of the switching-off coil received by the third signal receiver on an oscilloscope;
step 203, according to the energizing condition of the opening coil, the two fractures are respectively disconnected;
step 204, current signals sent by the signal transmitter flow to two fractures respectively;
step 205, a first signal receiver receives a current signal of a first fracture, and a second signal receiver receives a current signal of a second fracture;
step 206, the oscillograph displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
step 207, determining the opening time according to the start-stop time of the waveform interruption or the continuous start-stop time.
Wherein the current signals emitted by the signal emitters flow to the two breaks respectively, and thus may be referred to as the current signal of the first break and the current signal of the second break, respectively.
In this embodiment, when the opening time of the double-break circuit breaker needs to be measured, the opening coil starts to be electrified, a third signal receiver connected with the opening coil receives an electrifying signal of the opening coil, and displays a waveform of the electrifying signal on the oscilloscope, after the opening coil is electrified, the two breaks are correspondingly disconnected, the signal transmitter transmits current signals of the two breaks according to the opening condition of the two breaks, then a first signal receiver hung on the first break side receives the current signal of the first break, a second signal receiver hung on the second break side receives the current signal of the second break, and displays the waveform of the current signal of the first break and the waveform of the current signal of the second break on the oscilloscope, and the opening time is determined according to the waveform interruption or continuous starting and stopping time.
Referring to fig. 3, a work flow chart of a closing method in a method for testing opening and closing time of a double-break circuit breaker includes:
step 301, when a switch-on is needed, a switch-on coil is electrified, and a fourth signal receiver receives an electrified signal of the switch-on coil;
step 302, displaying a waveform of an energizing signal of the closing coil received by a fourth signal receiver on an oscilloscope;
step 303, according to the energizing condition of the closing coil, the two fractures are closed respectively;
step 304, current signals sent by the signal transmitter flow to two fractures respectively;
step 305, the first signal receiver receives the current signal of the first fracture, while the second signal receiver receives the current signal of the second fracture;
step 306, the oscilloscope displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
and step 307, determining the closing time according to the starting and ending time of the waveform interruption or the continuous starting and ending time.
Wherein the current signals emitted by the signal emitters flow to the two breaks respectively, and thus may be referred to as the current signal of the first break and the current signal of the second break, respectively.
In this embodiment, when the closing time of the double-break circuit breaker needs to be measured, the closing coil starts to be electrified, a third signal receiver connected with the closing coil receives an electrifying signal of the closing coil and displays a waveform of the electrifying signal on the oscilloscope, after the closing coil is electrified, two breaks are both closed, the signal transmitter transmits a current signal according to the closing condition of the two breaks, then the first signal receiver hung on the first break side receives the current signal of the first break, the second signal receiver hung on the second break side receives the current signal of the second break, the waveform of the current signal of the first break and the waveform of the current signal of the second break are displayed on the oscilloscope, and the closing time is determined according to the starting and stopping time of the waveform interruption or the continuity.
According to the switching-on/off time testing method of the double-break circuit breaker disclosed in the embodiment, when a switch is opened, a switch-off coil is electrified, a third signal receiver receives an electrified signal of the switch-off coil and displays a waveform of the electrified signal on an oscilloscope, a signal transmitter sends a current signal according to the electrified condition of the switch-off coil, a first signal receiver receives the current signal of a first break, a second signal receiver receives the current signal of a second break, and displays waveforms of the current signal of the first break and the current signal of the second break on the oscilloscope, and the switch-off time is determined according to the starting and stopping time of the final interruption or the continuous waveform; when the switch-on is performed, the switch-on coil is electrified, the fourth signal receiver receives an electrified signal of the switch-on coil and displays a waveform of the electrified signal on the oscilloscope, the signal transmitter sends out a current signal according to the electrified condition of the switch-on coil, the first signal receiver receives the current signal of the first fracture, the second signal receiver receives the current signal of the second fracture and displays waveforms of the current signal of the first fracture and the current signal of the second fracture on the oscilloscope, and the switch-on time is determined according to the starting and stopping time of the final interruption or the continuous waveform.
By adopting the method for testing the opening and closing time of the double-break breaker, the problem that the opening and closing time cannot be measured under the condition that the two ends of the double-break breaker are grounded in the prior art can be effectively solved.
Further, in the embodiment of the present application, when the opening time needs to be measured, a difference between a start time of a waveform of an energizing signal of the opening coil received by the third signal receiver displayed by the oscilloscope and a stop time of a waveform of a current signal of the first fracture received by the first signal receiver displayed by the oscilloscope is the opening time of the first fracture;
and the difference between the starting time of the waveform of the energizing signal of the opening coil received by the third signal receiver displayed by the oscilloscope and the ending time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the opening time of the second fracture.
Further, in the embodiment of the present application, when the closing time needs to be measured, a difference between a start time of a waveform of an energizing signal of the closing coil received by the fourth signal receiver displayed by the oscilloscope and a start time of a waveform of a current signal of the first fracture received by the first signal receiver displayed by the oscilloscope is the closing time of the first fracture;
and the difference between the starting time of the waveform of the energizing signal of the closing coil received by the fourth signal receiver displayed by the oscilloscope and the starting time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the closing time of the second fracture.
In the actual overhaul test process of the double-break circuit breaker, whether the opening time and the closing time meet the regulations or not is judged, and the different periods of the two breaks are also judged, namely, the opening time difference of the two breaks is the opening different period time, the closing time difference is the closing different period time, the intrinsic opening and closing time of the high-voltage circuit breaker in DL/T273-2012 is regulated, the closing different period time of each break is not more than 3ms, and the opening different period time is not more than 2ms. Therefore, the method has the same significance in accurately measuring different periods of time of the double-break circuit breaker.
According to the method for testing the opening and closing time of the double-break circuit breaker, the opening and closing time of the break can be accurately measured, different periods of time of the double-break circuit breaker can be calculated, and the method is significant in overhauling of the double-break circuit breaker.
The same or similar parts between the various embodiments in this specification are referred to each other. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, as far as reference is made to the description in the method embodiments.
The above-described embodiments of the present application are not intended to limit the scope of the present application.
Claims (7)
1. The utility model provides a divide-shut brake time testing arrangement of double-break circuit breaker which characterized in that includes: the system comprises a grounding wire, a signal transmitter, a first signal receiver, a second signal receiver, a third signal receiver, a fourth signal receiver and an oscilloscope;
the earth connection is connected with a common point and an earth screen of two fractures in the double-fracture circuit breaker, the earth connection is used for respectively forming two loops for the two fractures of the double-fracture circuit breaker, and the two fractures comprise: a first fracture and a second fracture, the two circuits comprising: the double-break circuit breaker comprises a first circuit and a second circuit, wherein a first break, a first ground knife, a ground net and the ground wire of the double-break circuit breaker form the first circuit, and the first ground knife is positioned at one side of the first break and used for controlling the grounding of the first break; the second circuit is formed by a second fracture of the double-fracture breaker, a second grounding knife, a grounding grid and the grounding wire, wherein the second grounding knife is positioned at one side of the second fracture and is used for controlling the grounding of the second fracture;
the signal transmitter is arranged on the grounding wire and is used for transmitting current signals to the first signal receiver and the second signal receiver;
the first signal receiver is arranged on a first ground knife lead at a first fracture side in the double-fracture breaker, is connected with the oscilloscope and is used for receiving a current signal sent by the signal transmitter;
the second signal receiver is arranged on a second ground knife lead at a second fracture side in the double-fracture breaker, the second signal receiver is connected with the oscilloscope, and the second signal receiver is used for receiving a current signal sent by the signal transmitter;
the third signal receiver is arranged on a brake separating coil in the double-break circuit breaker, the third signal receiver is connected with the oscilloscope, the brake separating coil is electrified when the brake is separated, and the third signal receiver is used for receiving an electrified signal of the brake separating coil;
the fourth signal receiver is arranged on a closing coil in the double-break circuit breaker, the fourth signal connector is connected with the oscilloscope, when the oscilloscope is closed, the closing coil is electrified, and the fourth signal receiver is used for receiving an electrified signal of the closing coil;
the oscillograph is used for displaying waveforms of signals of the first signal receiver, the second signal receiver, the third signal receiver and the fourth signal receiver, and the starting and stopping time of the waveform interruption or the continuous starting and stopping time is used for determining the opening time and the closing time.
2. The apparatus for testing opening and closing time of a double-break circuit breaker according to claim 1, wherein,
the two ends of the grounding wire are conductive metal clips, one end of the grounding wire is connected to a common point of two fracture points of the double-fracture circuit breaker, and the other end of the grounding wire is connected to the grounding grid.
3. The apparatus for testing opening and closing time of a double-break circuit breaker according to claim 1, wherein,
the opening time and the closing time comprise: the first fracture opening time, the second fracture opening time, the first fracture closing time and the second fracture closing time.
4. The apparatus for testing opening and closing time of a double-break circuit breaker according to claim 3, wherein,
the difference between the starting time of the first waveform displayed in the oscilloscope and the ending time of the second waveform displayed in the oscilloscope is the first fracture opening time;
the difference between the starting time of the first waveform displayed in the oscilloscope and the ending time of the third waveform displayed in the oscilloscope is the second fracture opening time;
the first waveform is a waveform of a switching-off coil energizing signal of the third signal receiver, the second waveform is a waveform of a current signal of a first fracture received by the first signal receiver, and the third waveform is a waveform of a current signal of a second fracture received by the second signal receiver;
the difference between the starting time of the fourth waveform displayed in the oscilloscope and the starting time of the fifth waveform displayed in the oscilloscope is the closing time of the first fracture;
the difference between the starting time of the fourth waveform displayed in the oscilloscope and the starting time of the sixth waveform displayed in the oscilloscope is the closing time of the second fracture;
the fourth waveform is a waveform of a closing coil energizing signal of the fourth signal receiver, the fifth waveform is a waveform of a current signal of the first fracture received by the first signal receiver, and the sixth waveform is a waveform of a current signal of the second fracture received by the second signal receiver.
5. The method for testing the opening and closing time of the double-break circuit breaker is characterized by being applied to the device for testing the opening and closing time of the double-break circuit breaker according to claim 3 or 4, and comprises the following steps of:
when the switch-off is performed, the switch-off coil is electrified, and the third signal receiver receives an electrified signal of the switch-off coil;
displaying the waveform of the energizing signal of the switching-off coil received by the third signal receiver on an oscilloscope;
according to the energizing condition of the opening coil, the two fractures are respectively disconnected;
the current signals sent by the signal transmitter flow to the two fractures respectively;
the first signal receiver receives the current signal of the first fracture, and the second signal receiver receives the current signal of the second fracture;
the oscillograph displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
determining a brake separating time according to the start-stop time of the waveform interruption or the continuous start-stop time;
when the switch-on is performed, the switch-on coil is electrified, and a fourth signal receiver receives an electrified signal of the switch-on coil;
displaying the waveform of the energizing signal of the closing coil received by the fourth signal receiver on the oscilloscope;
according to the energizing condition of the closing coil, the two fractures are respectively closed;
the current signals sent by the signal transmitter flow to the two fractures respectively;
the first signal receiver receives the current signal of the first fracture, and the second signal receiver receives the current signal of the second fracture;
the oscillograph displays the waveform of the current signal of the first fracture and the waveform of the current signal of the second fracture;
and determining the closing time according to the starting and stopping time of the waveform interruption or the continuous starting and stopping time.
6. The method for testing the opening and closing time of the double-break circuit breaker according to claim 5, wherein,
when the switch is opened, the difference between the starting time of the waveform of the energizing signal of the switch-off coil received by the third signal receiver displayed by the oscilloscope and the ending time of the waveform of the current signal of the first fracture received by the first signal receiver displayed by the oscilloscope is the switch-off time of the first fracture;
and the difference between the starting time of the waveform of the energizing signal of the opening coil received by the third signal receiver displayed by the oscilloscope and the ending time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the opening time of the second fracture.
7. The method for testing the opening and closing time of the double-break circuit breaker according to claim 5, wherein,
when the switching-on is needed, the difference between the starting time of the waveform of the energizing signal of the switching-on coil received by the fourth signal receiver displayed by the oscilloscope and the starting time of the waveform of the current signal of the first fracture received by the first signal receiver displayed by the oscilloscope is the switching-on time of the first fracture;
and the difference between the starting time of the waveform of the energizing signal of the closing coil received by the fourth signal receiver displayed by the oscilloscope and the starting time of the waveform of the current signal of the second fracture received by the second signal receiver displayed by the oscilloscope is the closing time of the second fracture.
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