CN213213085U - Submersible pump test power supply circuit for nuclear power station and power supply device thereof - Google Patents
Submersible pump test power supply circuit for nuclear power station and power supply device thereof Download PDFInfo
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- CN213213085U CN213213085U CN202022047079.7U CN202022047079U CN213213085U CN 213213085 U CN213213085 U CN 213213085U CN 202022047079 U CN202022047079 U CN 202022047079U CN 213213085 U CN213213085 U CN 213213085U
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Abstract
The utility model belongs to the technical field of nuclear power station power transmission and distribution and protection, a submersible pump test power supply circuit and power supply unit for nuclear power station is proposed, wherein, submersible pump test power supply circuit includes the three-phase power cord, the zero line, a protection circuit, first switch circuit, starting switch, scram switch, second switch circuit and trigger circuit, submersible pump test power supply circuit can carry out manual power-on and outage to power supply circuit through starting switch and scram switch, and simultaneously, when the submersible pump takes place the overload or overflows, protection circuit breaks off by oneself and realizes overload or overcurrent protection, the problem that traditional power supply mode exists and can not cut off the power supply by oneself and lead to the submersible pump to burn out or skip section upper reaches power supply switch under the submersible pump fault condition has been solved, the security and the reliability of submersible pump power supply have been improved.
Description
Technical Field
The application belongs to the technical field of power transmission and distribution and protection of nuclear power stations, and particularly relates to a power supply circuit of an oil-submerged pump test power supply for a nuclear power station and a power supply device of the oil-submerged pump test power supply.
Background
The power transformer is used as important electrical equipment and is used for converting the output power of the unit to a proper voltage level and outputting the power to a power grid system, or regulating the voltage of the power grid system through the transformer and supplying the regulated voltage to users, and the transmission of electric energy is realized through the voltage increase or reduction of the transformer. When the transformer normally operates, the interior of the transformer is filled with transformer oil. The transformer self produces the heat, and through the circulation effect of transformer submersible pump, the oil stream circulates through the oil duct of setting for in the casing, releases the heat to the external world through the exchange of radiator group, maintains the operating temperature of transformer body at a good level.
The transformer submersible pump bears a power source for flowing oil flow in the shell, when the submersible pump fails or is limited in function and cannot work normally, the oil flow in the transformer is basically in a stagnation state, heat productivity of components such as a winding iron core and the like cannot be exchanged and discharged in time, and local hot spots can be formed at the positions. According to the 6-degree rule, after the temperature of the transformer winding is higher than 80 ℃, the aging speed of the transformer is doubled after the temperature of the transformer is increased by 6 ℃, and the insulation life of the transformer is reduced by half. The operation reliability of the submersible pump seriously influences the operation life of the transformer.
The oil discharge maintenance window is arranged in ten years of the transformer, and the submersible pump is replaced, so that potential operation hidden dangers caused by factors such as performance reduction after the cooling oil pump operates for a long time are eliminated. Before the submersible pump is installed in a transformer pipeline loop, the submersible pump is installed on an offline test platform to perform an on-load test, the submersible pump is directly connected to an oil pump through three temporary cables to supply power, a protection original is not provided to disconnect a power supply in time under the condition of oil pump failure, and the risk of burning the oil pump or passively receiving an upstream power supply switch of a skip section is passively received.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a power supply circuit for a submersible pump test power supply, and aims to solve the problem that the conventional power supply mode cannot automatically cut off power to cause the submersible pump to be burnt or skip a section upstream power supply switch under the condition of the fault of the submersible pump.
The first aspect of the embodiment of the application provides a power supply circuit of an oil-submerged pump test power supply, which is suitable for a nuclear power station, wherein the power supply circuit of the oil-submerged pump test power supply comprises a three-phase power line, a zero line, a protection circuit, a first switch circuit, a starting switch, an emergency stop switch, a second switch circuit and a trigger circuit;
the input end of the three-phase power line and the input end of the zero line are used for being connected with an external power supply, the output end of the three-phase power line and the output end of the zero line are used for being connected with the power supply end of the submersible pump, and the protection circuit and the first switch circuit are sequentially connected in series between the input end of the three-phase power line and the input end of the zero line as well as between the output end of the three-phase power line and the output end of the zero line;
the emergency stop switch, the starting switch, the second switch circuit and the trigger circuit are sequentially connected in series and are connected with one phase power line of the three-phase power lines and the zero line, the protection circuit is electrically interlocked with the second switch circuit, and the first switch circuit is electrically interlocked with the trigger circuit;
the protection circuit is configured to:
when the power of the external power supply is smaller than the preset rated power and the current is smaller than the preset rated current, powering on and closing and controlling the second switch circuit to be closed;
when the power of the external power supply is greater than the preset rated power and the current is greater than the preset rated current, the external power supply is disconnected and controls the second switch circuit to be switched off;
the trigger circuit is configured to:
powering on when the starting switch acts and the second switch circuit is closed, and triggering the first switch circuit to be closed;
and when the emergency stop switch acts or the second switch circuit is switched off, the power is cut off, and the first switch circuit is triggered to be switched off.
In one embodiment, the protection circuit is a main protection thermal relay, and the second switch circuit is a normally open contact of the main protection thermal relay.
In one embodiment, the first switching circuit and the triggering circuit are a switching component and a coil component of a contactor, respectively.
In one embodiment, the contactor further comprises a normally open contact, and the normally open contact of the contactor is connected in parallel with two ends of the starting switch.
In one embodiment, the submersible pump test power supply circuit further comprises a main power manual switch and an auxiliary power manual switch;
the first end of the main power manual switch is respectively connected with the input end of the three-phase power line and the input end of the zero line, and the second end of the main power manual switch is connected with the input end of the protection circuit;
the first end of the auxiliary power manual switch is respectively connected with one phase power line of the three phase power lines and the zero line, and the second end of the auxiliary power manual switch is respectively connected with the emergency stop switch, the starting switch, the second switch circuit and the trigger circuit in series in sequence.
In one embodiment, the submersible pump test power supply circuit further comprises a voltmeter, and the voltmeter is respectively connected with two power lines of the three-phase power lines;
and the voltmeter is used for monitoring the line voltage of the power supply loop of the submersible pump.
In one embodiment, the submersible pump test power supply circuit further comprises three ammeters, and the three ammeters are respectively connected in series with the three-phase power line;
and the three ammeters are used for respectively monitoring each phase current of the power supply loop of the submersible pump.
In one embodiment, the submersible pump test power supply circuit further comprises an input power indicator lamp, wherein the input power indicator lamp is connected to the front stage of the protection circuit and is connected with one phase power line and the zero line of the three-phase power lines;
and the input power supply indicator lamp is used for indicating the power supply input state of the submersible pump test power supply circuit.
In one embodiment, the submersible pump test power supply circuit further comprises a three-way output power indicator, wherein the three-way output power indicator is connected to the rear stage of the first switching circuit and is connected to the three-phase power line in series;
and the three-way output power supply indicator lamp is used for indicating the power supply output state of the submersible pump test power supply circuit.
The second aspect of this application embodiment provides an oil-submerged pump test power supply unit, is applicable to the nuclear power station, oil-submerged pump test power supply unit includes as above oil-submerged pump test power supply circuit.
The embodiment of the utility model provides a through adopting the three-phase power cord, the zero line, protection circuit, first switch circuit, starting switch, the scram switch, second switch circuit and trigger circuit constitute the experimental power supply circuit of submersible pump, the experimental power supply circuit of submersible pump provides experimental power for submersible pump, and, can carry out manual power-on and outage to power supply circuit through starting switch and scram switch, and simultaneously, when the submersible pump takes place to transship or overflow, protection circuit breaks off by oneself and realizes transshipping or overcurrent protection, it has solved traditional power supply mode and has can not cut off the power supply by oneself and lead to the problem that the submersible pump burns out or skip section upper reaches power supply switch under the submersible pump fault condition, the security and the reliability of the power supply of submersible pump have been improved.
Drawings
Fig. 1 is a schematic diagram of a first structure of a power supply circuit of a submersible pump test power supply provided by an embodiment of the present application;
fig. 2 is a schematic diagram of a second structure of a power supply circuit of a submersible pump test power supply provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a submersible pump test power supply device provided in the embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The first aspect of the embodiment of the application provides an oil-submerged pump test power supply circuit, which is suitable for a nuclear power station.
In the embodiment, the power supply circuit of the submersible pump test power supply comprises a three-phase power supply line L1/L2/L3, a zero line N, a protection circuit 10, a first switch circuit 20, a starting switch 40, an emergency stop switch 30, a second switch circuit 50 and a trigger circuit 60;
the input end of a three-phase power line L1/L2/L3 and the input end of a zero line N are used for being connected with an external power supply, the output end of the three-phase power line L1/L2/L3 and the output end of the zero line N are used for being connected with a power supply end of the submersible pump PO, and the protection circuit 10 and the first switch circuit 20 are sequentially connected between the input end of the three-phase power line L1/L2/L3, the input end of the zero line N, the output end of the three-phase power line L1/L2/L3 and the output end of the zero line N in series;
the emergency stop switch 30, the starting switch 40, the second switch circuit 50 and the trigger circuit 60 are sequentially connected in series and are connected with one phase power line and a zero line N in a three-phase power line L1/L2/L3, the protection circuit 10 is electrically interlocked with the second switch circuit 50, and the first switch circuit 20 is electrically interlocked with the trigger circuit 60;
a protection circuit 10 for:
when the power of the external power supply is smaller than the preset rated power and the current is smaller than the preset rated current, powering on and closing the external power supply and controlling the second switch circuit 50 to be closed;
the external power supply is disconnected when the power is greater than the preset rated power and the current is greater than the preset rated current, and the second switch circuit 50 is controlled to be turned off;
a trigger circuit 60 for:
powering up and triggering the first switching circuit 20 to close when the start switch 40 is actuated and the second switching circuit 50 is closed;
when the emergency stop switch 30 is actuated or the second switch circuit 50 is turned off, the power is lost, and the first switch circuit 20 is triggered to be turned off.
In this embodiment, when needing to provide experimental power to submersible pump PO, with submersible pump experimental power supply circuit connect in power supply unit and the submersible pump PO of exporting external power, external power exports to submersible pump PO through submersible pump experimental power supply circuit, and carry out on-off control and transship to external power, overcurrent protection, submersible pump PO starts after receiving experimental power, and carry out functional test through test platform or device, break off power supply unit and submersible pump PO after the experiment, accomplish submersible pump PO test.
The protection circuit 10 and the first switch circuit 20 are connected in series in a main loop of a submersible pump test power supply circuit, the starting switch 40, the emergency stop switch 30, the second switch circuit 50 and the trigger circuit 60 are connected in series in a control loop, the protection circuit 10 and the second switch circuit 50 are electrically interlocked, the first switch circuit 20 and the trigger circuit 60 are electrically interlocked, in order to avoid personnel electric shock caused by misoperation and power transmission in the cable connection process, the starting switch 40 is arranged in the submersible pump test power supply circuit, the oil pump test power supply circuit can supply power to the submersible pump PO only after the starting switch 40 is manually operated to perform switching-on action, and meanwhile, the emergency stop switch 30 is arranged, and the emergency stop switch 30 can be manually operated in emergency to cut off the power supply of the oil pump test power supply circuit.
Specifically, after the external power supply is input, the protection circuit 10 monitors the power and the current of the external power supply, when the power is smaller than the preset rated power and the current is smaller than the preset rated current, the protection circuit 10 is closed, and meanwhile, the electrical interlocking controls the second switch circuit 50 to be closed, at the moment, when the manual operation starting switch 40 is switched on, the trigger circuit 60 is electrified, the electrical interlocking triggers the first switch circuit 20 to be closed, the main circuit and the control circuit are opened, and the external power supply is output to the submersible pump PO through the protection circuit 10 and the first switch circuit 20, so that a test power supply is provided for the submersible pump PO.
When the power of the external power supply exceeds the preset rated power and/or the current is larger than the preset rated power, namely, overload and/or overcurrent occurs, the protection circuit 10 is automatically turned off, meanwhile, the second switch circuit 50 is turned off, the main circuit and the control circuit are both powered off, overload and overcurrent protection of the submersible pump PO is realized, upstream abnormality of the external power supply is avoided, and the safety and reliability of power supply of the submersible pump PO are improved.
When an emergency occurs or the power needs to be cut off after the test is finished, the emergency stop switch 30 is manually operated, the control loop is disconnected, the trigger circuit 60 stops the power failure, the second switch circuit 50 is triggered to be turned off, and the main loop from the external power supply to the submersible pump PO is turned off to stop the power supply.
The protection circuit 10, the first switch circuit 20, the second switch circuit 50, and the trigger circuit 60 may adopt corresponding structures such as a contactor, a relay, a protection chip, and a switch module Km, and are specifically set as required.
The embodiment of the utility model provides a through adopting three-phase power cord L1/L2/L3, zero line N, protection circuit 10, first switch circuit 20, starting switch 40, scram switch 30, the experimental power supply circuit of submersible pump is constituteed to second switch circuit 50 and trigger circuit 60, the experimental power supply circuit of submersible pump provides experimental power for submersible pump PO, and, can carry out manual power-on and outage to power supply circuit through starting switch 40 and scram switch 30, and simultaneously, when the submersible pump PO takes place to transship or overflow, protection circuit 10 breaks off by oneself and realizes overload or overcurrent protection, it has solved traditional power supply mode and has can not cut off the power supply by oneself and lead to the problem that submersible pump PO burns out or skip the section upper reaches power supply switch under the submersible pump PO trouble condition to have solved, the security and the reliability of submersible pump PO power supply have been improved.
As shown in fig. 2, in one embodiment, the protection circuit 10 is a main protective thermal relay JA and the second switching circuit 50 is a normally open contact J1 of the main protective thermal relay JA.
The first switching circuit 20 and the triggering circuit 60 are a switching component Km and a coil component Kmx of the contactor, respectively.
In this embodiment, the normally open contact J1 of the main protection thermal relay JA is connected in the control loop, when the external power supply is not overloaded or overcurrent, the main protection thermal relay JA is automatically closed, and at the same time, the normally open contact J1 of the main protection thermal relay JA is triggered to be closed, after the start switch 40 acts, the coil component Kmx of the contactor is powered on, and at the same time, the switch component Km of the contactor is triggered to be closed, so that the main circuit is switched on and provides power for the submersible pump PO.
When an external power supply is overloaded or overcurrent, the main protection thermal relay JA is disconnected, meanwhile, the normally open contact J1 of the main protection thermal relay JA is triggered to be disconnected, the coil assembly Kmx of the contactor is powered off, the switch assembly Km of the contactor is disconnected, the main circuit is disconnected and cut off to provide power for the submersible pump PO, and overload and overcurrent self-adaptive protection is achieved.
When an emergency occurs or the power needs to be cut off after the test is finished, the emergency stop switch 30 is manually operated, the coil component Kmx of the contactor is powered off, the switch component Km of the contactor is disconnected, a main loop from an external power supply to the submersible pump PO is cut off, and the main loop is cut off and stops providing power for the submersible pump PO.
Further, the main protective thermal relay JA further includes an adjusting knob, and a protection fixed value can be manually set according to the load current, so that more loads can be compatible.
The start switch 40 and the scram switch 30 may be touch switches or mechanical switches, and in one embodiment, the start switch 40 is a start button T1 and the scram switch 30 is a scram button TO.
With continued reference to fig. 2, in one embodiment, the contactor further includes a normally open contact Km1, the normally open contact Km1 of the contactor being connected in parallel across the start switch 40.
In order to realize continuous power supply of the test power supply, after the contactor is powered on, the normally open contact Km1 of the contactor is closed at the same time, and the starting switch 40 is short-circuited to ensure that the coil assembly Kmx of the contactor is powered on continuously and the switch assembly Km of the contactor is kept in a normally closed state.
Continuing to refer to fig. 2, in one embodiment, the submersible pump test power supply circuit further comprises a main power manual switch Q1 and an auxiliary power manual switch JS;
a first end of a main power manual switch Q1 is respectively connected with an input end of a three-phase power line L1/L2/L3 and an input end of a zero line N, and a second end of the main power manual switch Q1 is connected with an input end of the protection circuit 10;
the first end of the auxiliary power manual switch JS is respectively connected with one phase power line and a zero line N in the three-phase power lines L1/L2/L3, and the second end of the auxiliary power manual switch JS is respectively connected with the emergency stop switch 30, the starting switch 40, the second switch circuit 50 and the trigger circuit 60 in series in sequence.
In this embodiment, the main power manual switch Q1 and the auxiliary power manual switch JS are respectively used for manually controlling the power-on and power-off of the main circuit and the control circuit, when a test power supply needs to be provided for the submersible pump PO, the main power manual switch Q1 and the auxiliary power manual switch JS are manually controlled to be closed in advance, the start switch 40 is manually operated, when the external power supply is normal, the main circuit and the control circuit are powered on, and the external power supply is output to the submersible pump PO to realize the power supply of the test power supply.
After the test is finished, the emergency stop switch 30, the auxiliary power supply manual switch JS and the main power supply manual switch Q1 are manually operated in sequence, and the test power supply circuit of the submersible pump quits the test power supply operation.
The auxiliary power manual switch JS and the main power manual switch Q1 can adopt a circuit breaker or an air switch, and each switch has an overcurrent protection function.
With reference to fig. 2, in an embodiment, the submersible pump test power supply circuit further includes a voltmeter V, and the voltmeter V is respectively connected to two power lines of the three-phase power lines L1/L2/L3;
and the voltmeter V is used for monitoring the line voltage of the power supply loop of the submersible pump PO.
The submersible pump test power supply circuit also comprises a three-way ammeter A1/A2/A3, wherein the three-way ammeter A1/A2/A3 are respectively connected in series on a three-phase power line L1/L2/L3;
and the three-way ammeter A1/A2/A3 is used for respectively monitoring each phase current of the power supply loop of the submersible pump PO.
The power supply circuit of the submersible pump test power supply also comprises an input power supply indicator light LA1, wherein the input power supply indicator light LA1 is connected with the front stage of the protection circuit 10 and is connected with one phase power supply line and a zero line N in the three-phase power supply lines L1/L2/L3;
and the input power indicator LA1 is used for indicating the power input state of the power supply circuit of the submersible pump test power supply.
The submersible pump test power supply circuit also comprises a three-way output power indicator light LA2/LA3/LA4, wherein the three-way output power indicator light LA2/LA3/LA4 is connected to the rear stage of the first switch circuit 20 and is connected to a three-phase power line L1/L2/L3 in series;
and the three-way output power indicator lamp LA2/LA3/LA4 is used for indicating the power output state of the power supply circuit of the submersible pump test power supply.
In the embodiment, the voltmeter V is connected with two power lines of a three-phase power line L1/L2/L3 and monitors the line voltage of a power circuit of the submersible pump PO, meanwhile, an input power indicator LA1 monitors the input state of an external power supply, three ammeters A1/A2/A3 respectively monitor each phase current of a power circuit of the submersible pump PO, three output power indicators LA2/LA3/LA4 indicate the power output state of the power supply circuit of the submersible pump test power supply, one ammeter A1/A2/A3 is respectively arranged at each three phase, and after a main circuit is switched on and carried, the three-phase running current is monitored in real time, defects can be found when the single-phase current is abnormal, and independent power indicator lamps are arranged in the three phases, when the load runs in a phase failure mode, one phase of power supply indicator light is not turned on, and abnormal phase failure running of the load can be found in advance.
When the power supply circuit of the submersible pump test power supply is connected to the power transmission operation, the power supply circuit of the submersible pump test power supply is firstly connected with the submersible pump PO and the power supply device, then, the main power manual switch Q1 is manually controlled, the voltmeter V is checked whether the indication is normal, the input power indicator LA1 is checked whether to be lightened, the input state and the voltage of the external power supply are monitored, when the voltage indication is normal and the input power indicator lamp LA1 lights, the auxiliary power manual switch JS is manually closed, the starting switch 40 is manually operated, whether the contactor is excited or not is checked, whether the three-way output power indicator lamp LA2/LA3/LA4 is lightened or not and whether the current value displayed by the three-way ammeter A1/A2/A3 is normal or not is checked, when the external power supply is normal, the main circuit and the control loop are electrified, and the external power supply is output to the submersible pump PO to realize power supply of the test power supply.
After the test is finished, the emergency stop switch 30, the auxiliary power supply manual switch JS and the main power supply manual switch Q1 are manually operated in sequence, and the test power supply circuit of the submersible pump quits the test power supply operation.
As shown in fig. 3, the utility model provides an experimental power supply unit of submersible pump is applicable to the nuclear power station, and this experimental power supply unit of submersible pump includes the experimental power supply circuit of submersible pump, and this experimental power supply circuit of submersible pump's concrete structure refers to above-mentioned embodiment, because this experimental power supply unit of submersible pump has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not repeated here one by one.
In this embodiment, submersible pump test power supply unit formula cabinet body structure as an organic whole, each monitoring display module and switch module all set up in the cabinet body surface, wherein PJ is the power access mouth, a power supply unit is used for connecting, the cabinet body side is provided with the opening, and connect submersible pump PO through the cable, relay and contactor set up in the cabinet is internal, start button T1, emergency stop button TO, auxiliary power manual switch JS and main power manual switch Q1, voltmeter V, three-way ampere meter A1/A2/A3A1/A2/A3, and each pilot lamp all sets up in the casing surface.
When the power supply device of the submersible pump test power supply is connected to the power transmission, the power supply device of the submersible pump test power supply is firstly connected with the submersible pump PO and the power supply device, then, the main power manual switch Q1 is manually controlled, the voltmeter V is checked whether the indication is normal, the input power indicator LA1 is checked whether to be lightened, the input state and the voltage of the external power supply are monitored, when the voltage indication is normal and the input power indicator lamp LA1 lights, the auxiliary power manual switch JS is manually closed, the starting switch 40 is manually operated, whether the contactor is excited or not is checked, whether the three-way output power indicator lamp LA2/LA3/LA4 is lightened or not and whether the current value displayed by the three-way ammeter A1/A2/A3 is normal or not is checked, when the external power supply is normal, the main circuit and the control loop are electrified, and the external power supply is output to the submersible pump PO to realize power supply of the test power supply.
After the test is finished, the emergency stop switch 30, the auxiliary power supply manual switch JS and the main power supply manual switch Q1 are manually operated in sequence, and the test power supply device of the submersible pump quits the test power supply operation.
The submersible pump test power supply device can be used for manually powering on and powering off a power supply circuit through the starting switch 40 and the emergency stop switch 30, meanwhile, when the submersible pump PO is overloaded or overcurrent, the protection circuit 10 is automatically disconnected to realize overload or overcurrent protection, the problem that the submersible pump PO is burnt or an upstream power supply switch jumps due to the fact that the power cannot be automatically disconnected under the condition of the PO fault of the submersible pump in the traditional power supply mode is solved, and the safety and the reliability of power supply of the submersible pump PO are improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A power supply circuit of a submersible pump test power supply is suitable for a nuclear power station and is characterized by comprising a three-phase power line, a zero line, a protection circuit, a first switch circuit, a starting switch, an emergency stop switch, a second switch circuit and a trigger circuit;
the input end of the three-phase power line and the input end of the zero line are used for being connected with an external power supply, the output end of the three-phase power line and the output end of the zero line are used for being connected with a power supply end of an oil-submersible pump, and the protection circuit and the first switch circuit are sequentially connected in series between the input end of the three-phase power line and the input end of the zero line and between the output end of the three-phase power line and the output end of the zero line;
the emergency stop switch, the starting switch, the second switch circuit and the trigger circuit are sequentially connected in series and are connected with one phase power line of the three-phase power lines and the zero line, the protection circuit is electrically interlocked with the second switch circuit, and the first switch circuit is electrically interlocked with the trigger circuit;
the protection circuit is configured to:
when the power of the external power supply is smaller than the preset rated power and the current is smaller than the preset rated current, powering on and closing and controlling the second switch circuit to be closed;
when the power of the external power supply is greater than the preset rated power and the current is greater than the preset rated current, the external power supply is disconnected and controls the second switch circuit to be switched off;
the trigger circuit is configured to:
powering on when the starting switch acts and the second switch circuit is closed, and triggering the first switch circuit to be closed;
and when the emergency stop switch acts or the second switch circuit is switched off, the power is cut off, and the first switch circuit is triggered to be switched off.
2. The submersible pump test power supply circuit of claim 1 wherein the protection circuit is a main protective thermal relay and the second switching circuit is a normally open contact of the main protective thermal relay.
3. The submersible pump test power supply circuit of claim 1 wherein the first switching circuit and the triggering circuit are a switching component and a coil component of a contactor, respectively.
4. The submersible pump test power supply circuit of claim 3 wherein the contactor further comprises a normally open contact, the normally open contact of the contactor being connected in parallel across the start switch.
5. The submersible pump test power supply circuit of any of claims 1 to 4, further comprising a main power manual switch and an auxiliary power manual switch;
the first end of the main power manual switch is respectively connected with the input end of the three-phase power line and the input end of the zero line, and the second end of the main power manual switch is connected with the input end of the protection circuit;
the first end of the auxiliary power manual switch is respectively connected with one phase power line of the three phase power lines and the zero line, and the second end of the auxiliary power manual switch is respectively connected with the emergency stop switch, the starting switch, the second switch circuit and the trigger circuit in series in sequence.
6. The submersible pump test power supply circuit according to any one of claims 1 to 4, further comprising a voltmeter, wherein the voltmeter is respectively connected to two power lines of the three power lines;
and the voltmeter is used for monitoring the line voltage of the power supply loop of the submersible pump.
7. The submersible pump test power supply circuit of any of claims 1 to 4, further comprising three ammeters, each of which is connected in series to the three-phase power line;
and the three ammeters are used for respectively monitoring each phase current of the power supply loop of the submersible pump.
8. The submersible pump test power supply circuit according to any one of claims 1 to 4, further comprising an input power indicator lamp connected to a front stage of the protection circuit and connected to one of the three-phase power lines and the neutral line;
and the input power supply indicator lamp is used for indicating the power supply input state of the submersible pump test power supply circuit.
9. The submersible pump test power supply circuit of any of claims 1 to 4, further comprising a three-way output power indicator, wherein the three-way output power indicator is connected to the rear stage of the first switching circuit and connected in series to the three-phase power line;
and the three-way output power supply indicator lamp is used for indicating the power supply output state of the submersible pump test power supply circuit.
10. A power supply device for a submersible pump test power supply is suitable for a nuclear power station and is characterized by comprising the submersible pump test power supply circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022047079.7U CN213213085U (en) | 2020-09-17 | 2020-09-17 | Submersible pump test power supply circuit for nuclear power station and power supply device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022047079.7U CN213213085U (en) | 2020-09-17 | 2020-09-17 | Submersible pump test power supply circuit for nuclear power station and power supply device thereof |
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| CN213213085U true CN213213085U (en) | 2021-05-14 |
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| CN202022047079.7U Active CN213213085U (en) | 2020-09-17 | 2020-09-17 | Submersible pump test power supply circuit for nuclear power station and power supply device thereof |
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| CN (1) | CN213213085U (en) |
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