CN107147100B - A kind of equipment and uninterruptible power supply for preventing power supply connection short circuit - Google Patents
A kind of equipment and uninterruptible power supply for preventing power supply connection short circuit Download PDFInfo
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- CN107147100B CN107147100B CN201710282043.7A CN201710282043A CN107147100B CN 107147100 B CN107147100 B CN 107147100B CN 201710282043 A CN201710282043 A CN 201710282043A CN 107147100 B CN107147100 B CN 107147100B
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- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Relay Circuits (AREA)
Abstract
The application disclose it is a kind of prevent power supply connection short circuit equipment and uninterruptible power supply, equipment include: main contactor, auxiliary contactor, current-limiting resistance and time-delay relay；Main contactor is connected between the output end of power supply and the power supply tie point of electrical equipment；Auxiliary contactor is connected between the output end of power supply and power supply tie point after connecting with current-limiting resistance；Tie point of powering is used for the coil power supply for delayed relay, and the normally opened contact of delayed relay is used to control the supply access of main contactor.There is short circuit in power supply any two output end, since auxiliary contactor is connected with current-limiting resistance, the voltage occurred between two output ends of short circuit will be applied on current-limiting resistance, the corresponding endpoint of power supply tie point will not have voltage, corresponding time-delay relay will not act, and when time-delay relay is failure to actuate, the supply access of main contactor is not turned on, it can thus be avoided the safety accident of initiation is powered on when power supply short circuit to electrical equipment.
Description
Technical field
This application involves uninterrupted power supply technical field more particularly to it is a kind of prevent power supply connection short circuit equipment and not between
Power-off source.
Background technique
With the arrival of big data era, finance and internet industry are more and more stronger for the demand of equipment uninterrupted power supply
It is strong.Therefore, uninterruptible power supply (UPS, Uninterruptible Power System) is increasingly heavier in the status of power supply link
It wants.The electrical equipment of these industries is also higher and higher for the reliability requirement of UPS.
The external battery capacity of high power UPS is big, voltage is also higher, usually several hectovolts.In the prior art for UPS
Protection generally use breaker or breaker to add the mode of fuse.
But in practical application, since the breaking speed and breaking capacity of breaker and fuse are limited, if electric in UPS
There is short circuit in the connection in pond, and when combined floodgate powers on, battery also occurs that the safety accidents such as explosion.
In the prior art, generally increase current measuring element in the power supply line of battery, cause big electricity when there is short circuit
When stream, the current signal of current measuring element detection needs to be more than predetermined threshold value, can just turn off power switch device.
But this mode just disconnects power supply when needing to detect high current signal, however high current can also in the short time
Cell damage can be caused even to explode.
Summary of the invention
This application provides a kind of equipment and uninterruptible power supply for preventing power supply connection short circuit, and it is short can to prevent power supply connection
Power supply is damaged when preventing to connect short circuit in road.
In a first aspect, providing a kind of equipment for preventing power supply connection short circuit, comprising: main contactor, auxiliary contactor, current limliting electricity
Resistance and time-delay relay；
The main contactor is connected between the output end of power supply and the power supply tie point of electrical equipment；
The auxiliary contactor is connected to the output end of the power supply after connecting with the current-limiting resistance and the confession is electrically connected
Between contact；
The power supply tie point is used for the coil power supply for the delayed relay, the normally opened contact of the delayed relay
For controlling the supply access of the main contactor.
In the first possible implementation of the first aspect, the output end of the power supply includes three output ends: the
One output end, second output terminal and third output end；
When the power supply is battery group, first output end, second output terminal and third output end are respectively as follows: anode
Output end, middle line output terminal and cathode output end；
The main contactor and auxiliary contactor include three contacts, three contacts respectively correspond the first output end,
Second output terminal and third output end；
The current-limiting resistance includes: the first current-limiting resistance and the second current-limiting resistance；
The time-delay relay includes: the first time-delay relay and the second time-delay relay；
Contact series corresponding with first output end in first current-limiting resistance and the auxiliary contactor, described
Contact series corresponding with the third output end in two current-limiting resistances and the auxiliary contactor；
The both ends of the coil of first time-delay relay are separately connected the anode and centerline of the power supply tie point, institute
The both ends for stating the coil of the second time-delay relay are separately connected the cathode and centerline of the power supply tie point；
The normally opened contact of first time-delay relay and the normally opened contact of the second time-delay relay are for controlling the master
The supply access of contactor.
With reference to first aspect and in any of the above-described kind of possible implementation, in the second possible implementation, also
It include: the first intermediate relay and the second intermediate relay；
The coil power supply of first intermediate relay is controlled by the normally opened contact of first time-delay relay, and described the
The normally opened contact of one intermediate relay is connected in the supply access of the main contactor；
The coil power supply of second intermediate relay is controlled by the normally opened contact of second time-delay relay, and described the
The normally opened contact of two intermediate relays is connected in the supply access of the main contactor.
With reference to first aspect and in any of the above-described kind of possible implementation, in the third possible implementation, also
Including the first bleeder circuit and the second bleeder circuit；
First bleeder circuit is used to be first time-delay relay after the voltage of the power supply tie point
Coil power supply；
Second bleeder circuit is used to be second time-delay relay after the voltage of the power supply tie point
Coil power supply.
With reference to first aspect and in any of the above-described kind of possible implementation, in the fourth possible implementation, institute
Stating the first bleeder circuit includes concatenated 3rd resistor and the 5th resistance；
Second bleeder circuit includes concatenated 4th resistance and the 6th resistance；
The coils from parallel connection of coils of first time-delay relay is at the both ends of the 5th resistance；
The coils from parallel connection of coils of second time-delay relay is at the both ends of the 6th resistance.
With reference to first aspect and in any of the above-described kind of possible implementation, in a fifth possible implementation, also
It include: closing switch；
The coil that the closing switch is used to control the auxiliary contactor is powered.
With reference to first aspect and in any of the above-described kind of possible implementation, in a sixth possible implementation, also
It include: the first breaker and the second breaker；
First breaker is connected with first output end, second breaker and the third output end string
Connection.
With reference to first aspect and in any of the above-described kind of possible implementation, in the 7th kind of possible implementation, institute
The output end for stating power supply includes three output ends: the first output end, second output terminal and third output end；
When the power supply is AC power source, first output end, second output terminal and third output end are respectively as follows: A phase
Output end, B phase output terminal and C phase output terminal；
The main contactor and auxiliary contactor include three contacts, three contacts respectively correspond the first output end,
Second output terminal and third output end；
The current-limiting resistance includes: the first current-limiting resistance, the second current-limiting resistance and third current resistor；
The time-delay relay includes: the first time-delay relay, the second time-delay relay and third time-delay relay；
Contact series corresponding with first output end in first current-limiting resistance and the auxiliary contactor, described
Contact series corresponding with the second output terminal in two current-limiting resistances and the auxiliary contactor；The third current-limiting resistance and institute
State contact series corresponding with the third output end in auxiliary contactor；
The both ends of the coil of first time-delay relay are separately connected the A phase and B phase of the power supply tie point, and described the
The both ends of the coil of two time-delay relays are separately connected the B phase and C phase point of the power supply tie point；The third time-delay relay
Coil both ends be separately connected it is described power supply tie point A phase and C phase；
The normally opened contact of first time-delay relay, the normally opened contact of the second time-delay relay and third time-delay relay
Normally opened contact be used to control the supply access of the main contactor.
With reference to first aspect and in any of the above-described kind of possible implementation, in the 8th kind of possible implementation, also
It include: the first intermediate relay, the second intermediate relay and third intermediate relay；
The coil power supply of first intermediate relay is controlled by the normally opened contact of first time-delay relay, and described the
The normally opened contact of one intermediate relay is connected in the supply access of the main contactor；
The coil power supply of second intermediate relay is controlled by the normally opened contact of second time-delay relay, and described the
The normally opened contact of two intermediate relays is connected in the supply access of the main contactor；
The coil power supply of the third intermediate relay is controlled by the normally opened contact of the third time-delay relay, and described the
The normally opened contact of three intermediate relays is connected in the supply access of the main contactor.
Second aspect provides a kind of uninterruptible power supply, including the equipment, further includes: battery group；
The battery group, in the ac input end power down of uninterruptible power supply, being power supply for electrical equipment；
The equipment, for protecting the battery group when the cable of the battery group connects short circuit.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that
When there is short circuit in power supply any two output end, since auxiliary contactor is connected with current-limiting resistance, such power supply
The voltage occurred between two output ends of short circuit will be entirely applied on current-limiting resistance, and the corresponding endpoint of power supply tie point will not
There can be voltage, when voltage is not present in the corresponding point of tie point of powering, corresponding time-delay relay will not be acted, and work as delay
When relay is failure to actuate, the supply access of main contactor would not be connected, it can thus be avoided to electrical equipment when power supply short circuit
Power on the safety accident of initiation.
Detailed description of the invention
Fig. 1 is a kind of embodiment schematic diagram of equipment of prevention power supply connection short circuit provided by the present application；
Fig. 2 is another two schematic diagram of embodiment of equipment of prevention power supply connection short circuit provided by the present application；
Fig. 3 is uninterruptible power supply schematic diagram provided by the present application.
Specific embodiment
The embodiment of the present application provide it is a kind of prevent power supply connection short circuit equipment, for power supply output end two-by-two it
Between connect output short-circuit when, play a protective role, avoid power supply damage even explode.
The working principle of equipment provided by the embodiments of the present application is described in detail with reference to the accompanying drawing.
Referring to Fig. 1, which is a kind of embodiment schematic diagram of equipment of prevention power supply connection short circuit provided by the present application.
It is provided in this embodiment prevention power supply connection short circuit equipment, comprising: main contactor KM01, auxiliary contactor KM02,
Current-limiting resistance R and time-delay relay KT；
The main contactor KM01 is connected between the output end of power supply 100 and the power supply tie point M of electrical equipment 200；
The auxiliary contactor KM02 is connected to output end and the institute of the power supply 100 after connecting with the current-limiting resistance R
It states between power supply tie point M；
The power supply tie point M is used for the coil power supply for the delayed relay KT, and the delayed relay KT's is normal
Contact is opened for controlling the supply access of the main contactor KM01.
The coil and normally opened contact of KT are not shown in Fig. 1, it is to be understood that corresponding normal when the coil of KT obtains electric
It opens contact to be just closed, KM01 just powers at this time, and then the normally opened contact closure of KM01, battery group 100 are electrical equipment
200 power supplies.When otherwise the coil of KT must not be electric, corresponding normally opened contact is not closed, and KM01 disconnects power supply at this time, and KM01's is normal
Contact is opened not to be closed.
It is understood that the output end of power supply is generally there are multiple, such as the output end of power supply includes three output ends:
First output end, second output terminal and third output end；
When the power supply is battery group, first output end, second output terminal and third output end are respectively as follows: anode
Output end, middle line output terminal and cathode output end；
When the power supply is AC power source, first output end, second output terminal and third output end are respectively as follows: A phase
Output end, B phase output terminal and C phase output terminal.
It can be understood that when power supply is three-phase alternating current, it is also possible to there are middle line output terminal, at this time power supply corresponding four it is defeated
Outlet.It all can be very serious if occurring short-circuit consequence between any two output end.
When short circuit occurs in power supply any two output end, since auxiliary contactor KM02 connects with current-limiting resistance R, in this way
The voltage that power supply occurs between two output ends of short circuit will be entirely applied on current-limiting resistance R, the corresponding end power supply tie point M
Point will not have voltage, and when voltage is not present in the corresponding point of tie point M of powering, corresponding time-delay relay KT will not be moved
Make, when time-delay relay is failure to actuate, the supply access of main contactor KM01 would not be connected, it can thus be avoided power supply is short
The safety accident of initiation is powered on when road to electrical equipment.
It is illustrated so that power supply is the battery group in UPS as an example below, it, can since UPS is according to different power supply occasions
The energy that can be needed is very big, generally requires multiple battery composition battery groups.
When power supply is battery group, three output ends are respectively as follows: cathode output end, middle line output terminal and cathode output
End；
Referring to fig. 2, which is the another embodiment schematic diagram of equipment of prevention power supply connection short circuit provided by the present application.
The main contactor KM01 and auxiliary contactor KM02 includes three contacts, as shown in Figure 2.Three contacts point
The first output end, second output terminal and the third output end of other corresponding power；
The current-limiting resistance includes: the first current-limiting resistance R1 and the second current-limiting resistance R2；
The time-delay relay includes: the first time-delay relay KT1 and the second time-delay relay KT2；
Contact series corresponding with first output end in the first current-limiting resistance R1 and auxiliary contactor KM02,
Contact series corresponding with the third output end in the second current-limiting resistance R2 and auxiliary contactor KM02；
The coil of the first time-delay relay KT1 by it is described power supply tie point M anode power, it is described second delay after
The coil of electric appliance KT2 is powered by the cathode of the power supply tie point M；
The normally opened contact of the first time-delay relay KT1 and the normally opened contact of the second time-delay relay KT2 are for controlling
The supply access of the main contactor KM01.
In addition, line packet power is big since the capacity of main contactor KM01 is very big (2000A), thus line packet operating current compared with
It greatly, has been more than the driving capability of time-delay relay.Therefore, which can also include: in the first intermediate relay KM1 and second
Between relay KM2；
The effect of KM1 and KM2 is to improve driving capability, KM01 can be driven to act.
The coil power supply of the first intermediate relay KM1 is controlled by the normally opened contact of the first time-delay relay KT1,
The normally opened contact of the first intermediate relay KM1 is connected in the supply access of the main contactor KM01；
The coil power supply of the second intermediate relay KM2 is controlled by the normally opened contact of the second time-delay relay KT2,
The normally opened contact of the second intermediate relay KM2 is connected in the supply access of the main contactor KM01.
It is understood that positive voltage is all added in when the cathode output end of battery group and middle line output terminal short circuit
The coil of R1, KT1 must not be electric, and corresponding KM1 coil must not be electric, and KM01 will not be closed.When battery group cathode output end and
When middle line output terminal short circuit, negative voltage is all added on R2, and the coil of KT2 must not be electric, and corresponding KM2 coil must not be electric, KM01
It will not be closed.When the cathode output end of battery group and cathode output end short circuit, the coil of KT1 and KT2 must not be electric, corresponding
KM1 and KM2 coil it is electric, KM01 will not be closed.
In addition, the pressure-bearing of KT1 and KT2 are lower since the voltage of power supply tie point M is higher, therefore, it is necessary to will be for electrical connection
It is the coil power supply of KT1 and KT2 after the voltage of point M.
The equipment further include: the first bleeder circuit and the second bleeder circuit；
First bleeder circuit is used to be first time-delay relay after the voltage of the power supply tie point
Coil power supply；
Second bleeder circuit is used to be second time-delay relay after the voltage of the power supply tie point
Coil power supply.
Specifically, with continued reference to Fig. 2, first bleeder circuit includes concatenated 3rd resistor R3 and the 5th resistance R5；
Second bleeder circuit includes concatenated 4th resistance R4 and the 6th resistance R6；
The coils from parallel connection of coils of the first time-delay relay KT1 is at the both ends of the 5th resistance R5；
The coils from parallel connection of coils of the second time-delay relay KT2 is at the both ends of the 6th resistance R6.
In addition, the closure in order to realize long-range control KM02, may include: closing switch S1；It is closed by remotely controlling S1
It closes and disconnects.
The coil that the closing switch S1 is used to control the auxiliary contactor KM02 is powered, and then controls the normally opened touching of KM02
Point closure.
In order to play conventional protective effect, which can also include: the first circuit breaker Q F1 and the second circuit breaker Q F2；
The first circuit breaker Q F1 connects with first output end, and the second circuit breaker Q F2 and the third export
End series connection.
As shown in Fig. 2, QF1 connects with R1, QF2 connects with R2.When corresponding branch current is too big, corresponding breaker
Movement, disconnects the branch, plays a protective role.
It is understood that QF1 and QF2 are normally off under normal condition.
In addition, the equipment can also include: third current-limiting resistance (being not shown in Fig. 2)；
The third current-limiting resistance is connected with the second output terminal.The effect of third current resistor is to further function as limit
The effect of stream, when anode and middle line, or, R1 or R2 further progress current limliting can be combined when cathode and center line short circuit.
The equipment can also include: third breaker (being not shown in Fig. 2)；
The third breaker is connected with the second output terminal.One is also connected on the branch road of middle line output terminal connection
A breaker.
The concrete operating principle of Fig. 2 is described below.
When battery group 100 powers on, after being closed S1, KM02 will be closed, and battery group 100 is through QF1/QF2, KM02, R1/R2
Branch power supply to power supply tie point M, if cable connection is correct, the M voltage is normal.The voltage is through R3+R5, R4+R6 simultaneously
Bleeder circuit give respectively KT1, KT2 power, when short time-delay after act, respectively control KM1, KM2 movement.+ 48V controls power supply warp
The normally opened contact power supply of KM1 and KM2 is closed to KM01, KM01, and battery group 100 starts as the power supply of electrical equipment 200.
If occurring short circuit when battery 100 wiring of group, such as the anode and middle line at the place power supply tie point M are short-circuit, then when
When KM02 is closed, positive voltage is all added on R1, and KT1 will not work due to not having voltage, and KM1 is also failure to actuate, and KM01 can not
It closes a floodgate.
Similarly, when cathode is with middle line short circuit, KT2, KM2 will not be acted, and KM01 can not close a floodgate.
When positive electrode and negative electrode short circuit, 2 time-delay relays (KT1 and KT2) and 2 intermediate relays (KM1 and KM2) are not
It can act.Therefore, as long as there is wiring short circuit, KM01 can not be closed and power on, power on to effectively prevent battery group 100
Safety accident caused by short circuit.
It should be noted that the equipment that above embodiments provide is preferably applied in UPS, the protection of corresponding battery group.
Since UPS generally includes three kinds of power ports: exchange input, direct current input and exchange output.UPS test is carried out in laboratory to test
When card, need to provide corresponding power supply to input port, output end connects electrical equipment, just can be carried out various functions parameter
Test.It is all to be attached using flexible cable when test.The direct current input of UPS is usually to be powered by battery group, for big
The supply current of power UPS, battery group are big, and cable is all more used in parallel, and UPS model machine is needed to constantly change in test.
Therefore, it is necessary to cable of often taking out stitches, wiring cables.If cable connection error leads to short circuit, when the power-cutting switch of closure battery group
Shi Zehui causes battery explosion equal major accidents on fire.The equipment that the application above embodiments provide can be short to avoid cable wrong
The accidents such as battery explosion caused by road is on fire.
In addition, the equipment is also not limited to suitable for UPS, it also can be applied to other power supplys, such as three-phase alternating current supplies
Power supply.With the difference of practical application scene, the number of time-delay relay is converted.Need to guarantee that any both threads are shorted
When, there are a time-delay relays in the circuit after short circuit.Below for power supply be three-phase alternating current when simply introduced.
When the power supply is AC power source, the output end of power supply includes three output ends: the first output end, second output terminal
With third output end；First output end, second output terminal and third output end are respectively as follows: A phase output terminal, B phase output terminal
With C phase output terminal；
The main contactor and auxiliary contactor include three contacts, three contacts respectively correspond the first output end,
Second output terminal and third output end；
The current-limiting resistance includes: the first current-limiting resistance, the second current-limiting resistance and third current resistor；
The time-delay relay includes: the first time-delay relay, the second time-delay relay and third time-delay relay；
Contact series corresponding with first output end in first current-limiting resistance and the auxiliary contactor, described
Contact series corresponding with the second output terminal in two current-limiting resistances and the auxiliary contactor；The third current-limiting resistance and institute
State contact series corresponding with the third output end in auxiliary contactor；
The both ends of the coil of first time-delay relay are separately connected the A phase and B phase of the power supply tie point, and described the
The both ends of the coil of two time-delay relays are separately connected the B phase and C phase point of the power supply tie point；The third time-delay relay
Coil both ends be separately connected it is described power supply tie point A phase and C phase；
The normally opened contact of first time-delay relay, the normally opened contact of the second time-delay relay and third time-delay relay
Normally opened contact be used to control the supply access of the main contactor.
It is understood that be that battery group is not both with power supply, three-phase alternating-current supply need corresponding three delays after
Electric appliance needs to connect the coil of a time-delay relay between any two-phase in A, B, C three-phase.
Similarly, three-phase alternating-current supply needs corresponding three intermediate relays: the first intermediate relay, the second intermediate relay
With third intermediate relay；
The coil power supply of first intermediate relay is controlled by the normally opened contact of first time-delay relay, and described the
The normally opened contact of one intermediate relay is connected in the supply access of the main contactor；
The coil power supply of second intermediate relay is controlled by the normally opened contact of second time-delay relay, and described the
The normally opened contact of two intermediate relays is connected in the supply access of the main contactor；
The coil power supply of the third intermediate relay is controlled by the normally opened contact of the third time-delay relay, and described the
The normally opened contact of three intermediate relays is connected in the supply access of the main contactor.
The protection of three-phase alternating-current supply is similar with the protection of battery group, and details are not described herein for concrete operating principle.
Based on the equipment that above embodiments provide, the embodiment of the present application also provides a kind of uninterruptible power supply, including above real
Apply equipment described in example, further includes: battery group 100；
The battery group 100, for being powered for electrical equipment 200 in the ac input end power down of uninterruptible power supply；
The equipment 300, for protecting the battery group when the cable of the battery group 100 connects short circuit
100.When occurring short circuit between multiple output ends of battery-free group 100, the battery damaged in battery group even causes electricity
Pond explosion.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. it is a kind of prevent power supply connection short circuit equipment characterized by comprising main contactor, auxiliary contactor, current-limiting resistance and
Time-delay relay；
The main contactor is connected between the output end of power supply and the power supply tie point of electrical equipment；
The auxiliary contactor be connected to after connecting with the current-limiting resistance power supply output end and the power supply tie point it
Between；
The power supply tie point is used for the coil power supply for the time-delay relay, and the normally opened contact of the time-delay relay is used for
Control the supply access of the main contactor；
The output end of the power supply includes three output ends: the first output end, second output terminal and third output end；
When the power supply is battery group, first output end, second output terminal and third output end are respectively as follows: positive output
End, middle line output terminal and cathode output end；
The main contactor and auxiliary contactor include three contacts, and three contacts respectively correspond the first output end, second
Output end and third output end；
The current-limiting resistance includes: the first current-limiting resistance and the second current-limiting resistance；
The time-delay relay includes: the first time-delay relay and the second time-delay relay；
Contact series corresponding with first output end in first current-limiting resistance and the auxiliary contactor, second limit
Contact series corresponding with the third output end in leakage resistance and the auxiliary contactor；
The both ends of the coil of first time-delay relay are separately connected the anode and centerline of the power supply tie point, and described the
The both ends of the coil of two time-delay relays are separately connected the cathode and centerline of the power supply tie point；
The normally opened contact of first time-delay relay and the normally opened contact of the second time-delay relay are for controlling the main contact
The supply access of device.
2. it is according to claim 1 prevention power supply connection short circuit equipment, which is characterized in that further include: among first after
Electric appliance and the second intermediate relay；
The coil power supply of first intermediate relay is controlled by the normally opened contact of first time-delay relay, in described first
Between the normally opened contact of relay be connected in the supply access of the main contactor；
The coil power supply of second intermediate relay is controlled by the normally opened contact of second time-delay relay, in described second
Between the normally opened contact of relay be connected in the supply access of the main contactor.
3. the equipment of prevention power supply connection short circuit according to claim 1, which is characterized in that further include the first bleeder circuit
With the second bleeder circuit；
First bleeder circuit be used for by it is described power supply tie point voltage after be first time-delay relay line
Circle power supply；
Second bleeder circuit be used for by it is described power supply tie point voltage after be second time-delay relay line
Circle power supply.
4. the equipment of prevention power supply connection short circuit according to claim 3, which is characterized in that the first bleeder circuit packet
Include concatenated 3rd resistor and the 5th resistance；
Second bleeder circuit includes concatenated 4th resistance and the 6th resistance；
The coils from parallel connection of coils of first time-delay relay is at the both ends of the 5th resistance；
The coils from parallel connection of coils of second time-delay relay is at the both ends of the 6th resistance.
5. the equipment of prevention power supply connection short circuit according to claim 1, which is characterized in that further include: closing switch；
The coil that the closing switch is used to control the auxiliary contactor is powered.
6. the equipment of prevention power supply connection short circuit according to claim 1, which is characterized in that further include: the first breaker
With the second breaker；
First breaker is connected with first output end, and second breaker is connected with the third output end.
7. it is a kind of prevent power supply connection short circuit equipment characterized by comprising main contactor, auxiliary contactor, current-limiting resistance and
Time-delay relay；
The main contactor is connected between the output end of power supply and the power supply tie point of electrical equipment；
The auxiliary contactor be connected to after connecting with the current-limiting resistance power supply output end and the power supply tie point it
Between；
The power supply tie point is used for the coil power supply for the time-delay relay, and the normally opened contact of the time-delay relay is used for
Control the supply access of the main contactor；
The output end of the power supply includes three output ends: the first output end, second output terminal and third output end；
When the power supply is AC power source, first output end, second output terminal and third output end are respectively as follows: A phase and export
End, B phase output terminal and C phase output terminal；
The main contactor and auxiliary contactor include three contacts, and three contacts respectively correspond the first output end, second
Output end and third output end；
The current-limiting resistance includes: the first current-limiting resistance, the second current-limiting resistance and third current-limiting resistance；
The time-delay relay includes: the first time-delay relay, the second time-delay relay and third time-delay relay；
Contact series corresponding with first output end in first current-limiting resistance and the auxiliary contactor, second limit
Contact series corresponding with the second output terminal in leakage resistance and the auxiliary contactor；The third current-limiting resistance with it is described auxiliary
Contact series corresponding with the third output end in contactor；
The both ends of the coil of first time-delay relay are separately connected the A phase and B phase of the power supply tie point, and described second prolongs
When relay coil both ends be separately connected it is described power supply tie point B phase and C phase point；The line of the third time-delay relay
The both ends of circle are separately connected the A phase and C phase of the power supply tie point；
The normally opened contact of first time-delay relay, the normally opened contact of the second time-delay relay and third time-delay relay it is normal
Contact is opened to be used to control the supply access of the main contactor.
8. it is according to claim 7 prevention power supply connection short circuit equipment, which is characterized in that further include: among first after
Electric appliance, the second intermediate relay and third intermediate relay；
The coil power supply of first intermediate relay is controlled by the normally opened contact of first time-delay relay, in described first
Between the normally opened contact of relay be connected in the supply access of the main contactor；
The coil power supply of second intermediate relay is controlled by the normally opened contact of second time-delay relay, in described second
Between the normally opened contact of relay be connected in the supply access of the main contactor；
The coil power supply of the third intermediate relay is controlled by the normally opened contact of the third time-delay relay, in the third
Between the normally opened contact of relay be connected in the supply access of the main contactor.
9. a kind of uninterruptible power supply, which is characterized in that including equipment described in any one of claims 1-6, further includes: battery
Group；
The battery group, in the ac input end power down of uninterruptible power supply, being power supply for electrical equipment；
The equipment, for protecting the battery group when the cable of the battery group connects short circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282043.7A CN107147100B (en) | 2017-04-26 | 2017-04-26 | A kind of equipment and uninterruptible power supply for preventing power supply connection short circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710282043.7A CN107147100B (en) | 2017-04-26 | 2017-04-26 | A kind of equipment and uninterruptible power supply for preventing power supply connection short circuit |
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| CN107147100A CN107147100A (en) | 2017-09-08 |
| CN107147100B true CN107147100B (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710282043.7A Active CN107147100B (en) | 2017-04-26 | 2017-04-26 | A kind of equipment and uninterruptible power supply for preventing power supply connection short circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111446644B (en) * | 2020-05-13 | 2022-05-10 | 广州市锦路电气设备有限公司 | Battery switch box with protection for preventing reverse connection of battery pack and UPS positive and negative poles |
| CN112216881B (en) * | 2020-09-24 | 2023-03-03 | 中国电子科技集团公司第十八研究所 | Control circuit and control method for zinc-silver reserve battery activation line resistor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215041U (en) * | 1987-11-01 | 1988-09-28 | 大庆石油管理局第四采油厂 | Automatic testing and cut-out device for line short fault |
| CN2165559Y (en) * | 1993-09-24 | 1994-05-18 | 李德常 | Motor protector |
| CN201479019U (en) * | 2009-08-24 | 2010-05-19 | 上海根兴电气成套有限公司 | Microcomputer controlled uninterrupted multi-output power cabinet |
| CN203445669U (en) * | 2013-09-23 | 2014-02-19 | 中芯国际集成电路制造(北京)有限公司 | Uninterrupted power source cell management apparatus |
| CN103490375B (en) * | 2013-10-09 | 2018-07-10 | 兰如根 | A kind of DC source output short circuit protective device |
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2017
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