CN214041570U - Power supply screen input integrated test bench - Google Patents

Abstract

The utility model discloses a power screen input combined test platform, a serial communication port, include: a first power supply input Uin1 and a second power supply voltage input Uin2 for connection to an external power grid; the first power output end Uout1 and the second power output end Uout2 are used for connecting a first path of power input end and a second path of power input end of the power screen; the fire wire end of the first power input end Uin1 is sequentially connected with a three-phase breaker QF11, an automatic voltage regulator TYQ1, a three-phase breaker QF12 and a contactor KM 11; the fire wire end of the second power input end Uin2 is sequentially connected with a three-phase circuit breaker QF21, a manual voltage regulator TYQ2, a three-phase circuit breaker QF22 and a contactor KM 21; the utility model discloses the different functional module of accessible realizes having great practical meaning to the detection function of excessive pressure, under-voltage, wrong looks and open phase of power screen input power.

Description

Power supply screen input integrated test bench

Technical Field

The utility model relates to a railway power supply screen technical field especially relates to a power supply screen input combined test board.

Background

The power supply screen is power supply equipment applied to the railway industry, and according to the standard requirements of a railway signal power supply system equipment series specified by the China's republic of China railway industry standard TB/T1528, the power supply screen is required to ensure that the input voltage can stably supply power when being at three-phase AC 380V +57-76V, and is also required to have the functions of three-phase power supply power failure, phase failure protection and the like.

In order to test the functions of the power supply panel, the current main test means are mainly as follows:

firstly, in order to adjust the voltage input to a power supply screen, an induction voltage regulator is usually arranged in an electric fitting workshop debugging area, the voltage range output by the induction voltage regulator is manually adjusted completely by shaking a hand wheel, and an external instrument is required for monitoring, so that the operation is inconvenient and potential safety hazards exist;

secondly, in order to test the power-off, phase-failure and phase-dislocation protection functions of a three-phase power supply (namely as an input power supply) of the power supply screen, the existing connecting circuit is simple in design and has certain potential safety hazards;

and thirdly, different function test instruments are required to be used for testing different functions. Because each function test instrument is not integrated, the power supply screen needs to borrow and reconnect circuits before the debugging of the whole machine and the factory inspection, the operation is inconvenient and the production progress is influenced.

Therefore, there is an urgent need to develop a technology capable of solving the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power screen input combined test board to the technical defect that prior art exists.

Therefore, the utility model provides a power supply screen input integrated test bench, including first power input end Uin1 and second power input end Uin2 to and first power output end Uout1 and second power output end Uout 2;

the first power supply input end Uin1 and the second power supply voltage input end Uin2 are used for being connected with an external power grid;

the first power output end Uout1 and the second power output end Uout2 are used for connecting a first path of power input end and a second path of power input end which are used as power screens of the tested equipment;

for the first power input end Uin1, the live wire end of the first power input end Uin1 is connected with a three-phase circuit breaker QF11, an automatic voltage regulator TYQ1, a three-phase circuit breaker QF12 and a contactor KM11 in sequence;

the contactor KM11 is connected in parallel with a contactor KM 12;

the contactor KM11 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS11, one end of an isolating switch QS12 and one end of an isolating switch QS 13;

the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are connected with a live wire end which is arranged at a first path of power supply input end of a power supply screen of the tested equipment through a first group of connecting terminals DZ 1;

for the second power input end Uin2, the live wire end of the second power input end Uin2 is connected with a three-phase circuit breaker QF21, a manual voltage regulator TYQ2, a three-phase circuit breaker QF22 and a contactor KM21 in sequence;

the contactor KM21 is connected in parallel with a contactor KM 22;

the contactor KM21 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS21, one end of an isolating switch QS22 and one end of an isolating switch QS 23;

the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are connected with a live wire end which is arranged at the input end of a second path of power supply of a power supply screen of the tested equipment through a second group of connecting terminals DZ 2.

Preferably, the zero line end of the first power input end Uin1 is connected to the zero line end of the first power input end of the power screen of the device under test through the first group of connecting terminals DZ 1;

the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are also connected with three live wire ends of a power socket GZ 1;

the first power input terminal Uin1 has a neutral terminal which is also connected to the neutral terminal of the power socket GZ 1.

Preferably, a phase sequence protector XQ1 is further connected to a three-phase connection line between the three-phase circuit breaker QF11 and the automatic voltage regulator TYQ 1.

Preferably, the port 11 of the phase sequence protector XQ1 is connected with two input ends of a rotary switch SA 11;

two output ends of the rotary switch SA11 are respectively connected with one end of an indicator lamp HL11 and one end of an indicator lamp HL 12;

the other end of the indicator lamp HL11 and the other end of the indicator lamp HL12 are respectively connected with one end of a dynamic breaking button K12 and one end of a dynamic breaking button K11;

the other end of the dynamic breaking button K12 and the other end of the dynamic breaking button K11 are connected with the port 21 of the phase sequence protector XQ1 after confluence and intersection.

Preferably, a voltmeter PV11, a voltmeter PV12 and a voltmeter PV13 are respectively connected to each phase connection circuit between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF 12;

each phase of connecting circuit between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF12 is also respectively connected with an ammeter PA11, an ammeter PA12 and an ammeter PA 13;

current transformers TA11, TA12 and TA13 are respectively connected in series to the ammeter PA11, the ammeter PA12 and the ammeter PA 13.

Preferably, the second power input end Uin2 has a zero line end, and is connected to a zero line end of a second path of power input end of the power screen as the device under test through a second group of connecting terminals DZ 2;

the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are also connected with three live wire ends of a power socket GZ 2;

the second power input end Uin1 has a zero line end N, and is also connected with the zero line end of the power socket GZ 2;

and a phase sequence protector XQ2 is also connected to a three-phase connecting line between the three-phase circuit breaker QF21 and the manual voltage regulator TYQ 2.

Preferably, the port 11 of the phase sequence protector XQ2 is connected with two input ends of a rotary switch SA 21;

two output ends of the rotary switch SA21 are respectively connected with one end of an indicator lamp HL21 and one end of an indicator lamp HL 22;

the other end of the indicator lamp HL21 and the other end of the indicator lamp HL22 are respectively connected with one end of a dynamic breaking button K22 and one end of a dynamic breaking button K21;

the other end of the dynamic breaking button K22 and the other end of the dynamic breaking button K21 are connected with the port 21 of the phase sequence protector XQ2 after confluence and intersection.

Preferably, a live wire L1, a live wire L2 and a live wire L3 between three-phase power supply input ends U1, V1 and W1 of the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 are respectively connected with three input ends of the three-phase circuit breaker QF 23;

three output ends of the three-phase breaker QF23 are respectively connected with three input ends of a voltage regulator motor M through a contactor KM 23;

the contactor KM23 is connected in parallel with a contactor KM 24;

the three-phase power output end U2, V2 and W2 of the manual voltage regulator TYQ2 are respectively connected with a wiring terminal U, V and W of a voltage regulator motor M;

preferably, a voltmeter PV21, a voltmeter PV22 and a voltmeter PV23 are respectively connected to each phase connection circuit between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF 22;

each phase of connecting line between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF22 is also respectively connected with an ammeter PA21, an ammeter PA22 and an ammeter PA 23;

current transformers TA21, TA22 and TA23 are respectively connected in series to the ammeter PA21, the ammeter PA22 and the ammeter PA 23.

Preferably, the first power input end Uin1 has four power sockets XS1, XS2, XS3 and XS4 connected between the live end L3 and the neutral end N;

four power sockets XS1, XS2, XS3 and XS4 are connected in parallel with each other;

the first path of power supply output end and the second path of power supply output end of the power supply screen as the tested equipment are connected with the input end of a probe power supply unit;

the probe power supply unit is used for being connected with a probe of the oscilloscope.

By above the utility model provides a technical scheme is visible, compares with prior art, the utility model provides a power screen input combined test platform, its structural design science can be through different functional module, realizes the detection function to excessive pressure, under-voltage, wrong phase and open phase of power screen input power (be three phase current) has great practical meaning.

Additionally, the utility model provides a power screen input combined test platform can simulate the input power condition that provides the power screen complete machine debugging of china's railway industry standard TB/T1528 regulation and the inspection of dispatching from the factory, need not manual regulation, can show reduction staff's intensity of labour.

Furthermore, the utility model provides a power screen input combined test board can also measure the conversion time of two way input power that the power screen has, satisfies the power screen functional requirement of dispatching from the factory test better.

Drawings

Fig. 1 is an overall circuit schematic diagram of a power supply panel input integrated test board provided by the present invention;

fig. 2 is a circuit block diagram of an embodiment of a power supply panel input integrated test board provided by the present invention;

fig. 3 is a schematic diagram of the verification of the automatic switching function of the two-path input power supply in the present invention;

FIG. 4 is a schematic diagram of the over-voltage and under-voltage protection function verification of two power supplies according to the present invention;

fig. 5 is a schematic diagram illustrating the function verification of the input power phase failure protection function in the present invention;

fig. 6 is a schematic diagram illustrating the input power source phase-error protection function verification according to the present invention;

fig. 7 is a schematic diagram of an interface for monitoring the switching time of two input power sources according to the present invention;

FIG. 8 is a schematic diagram of an interface for monitoring the power of an external power grid according to the present invention;

fig. 9 is a functional diagram for displaying voltage and current according to the present invention;

fig. 10 is an external view of the cabinet arrangement according to an embodiment of the present invention;

fig. 11 is an appearance schematic diagram of a cabinet arrangement according to another embodiment of the present invention.

Detailed Description

In order to make the technical means of the present invention easier to understand, the present application will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.

The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

Referring to fig. 1 to 11, the present invention provides a power panel input integrated test board, which is used as a front end test device of a power panel, and specifically includes two power input terminals, namely a first power input terminal Uin1 and a second power input terminal Uin2, and two power output terminals, namely a first power output terminal Uout1 and a second power output terminal Uout 2;

the first power supply input end Uin1 and the second power supply voltage input end Uin2 are used as input ends of a power supply screen input comprehensive test bench and are used for being connected with an external power grid (such as a distribution box of an external three-phase alternating current power grid);

and the first power output end Uout1 and the second power output end Uout2 are used as output ends of the power supply screen input comprehensive test board and are used for connecting a first path of power supply input end and a second path of power supply input end which are used as power supply screens of the tested equipment.

The utility model discloses in, in specifically realizing, as the power supply screen of equipment under test, for current railway signal power supply screen, for example can be PKZ type railway signal power supply screen for Tianjin railway signal limited responsibility company produces. The utility model discloses a combined test stand can be used to test the input power supply excessive pressure, under-voltage, wrong phase, open phase, electric energy quality monitoring and two way input power supply changeover time of railway signal power supply screen complete machine.

In the utility model discloses in, in the concrete implementation, see fig. 1 and show, for first power input end Uin1, the live wire end (including three-phase live wire L1, L2 and L3) that first power input end Uin1 has is connected with three-phase circuit breaker QF11, automatic voltage regulator TYQ1, three-phase circuit breaker QF12 and contactor KM11 in proper order;

the contactor KM11 is connected in parallel with a contactor KM 12;

the contactor KM11 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS11, one end of an isolating switch QS12 and one end of an isolating switch QS 13;

the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are connected with live wire ends (comprising three-phase live wires L1, L2 and L3) which are arranged at the first path of power supply input end of a power supply screen of the tested equipment through a first group of connecting terminals DZ 1;

in a specific implementation, a zero line end (i.e., an N line) of the first power input end Uin1 is connected to a zero line end (i.e., an N line) of a first power input end of a power screen of the device under test through the first group of connecting terminals DZ 1.

In particular, the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are also connected with three live wire ends (namely, A, B, C ends) of the power socket GZ 1;

the first power input terminal Uin1 has a neutral terminal N (i.e., an N-wire) that is also connected to the neutral terminal (i.e., an N-terminal) of the power outlet GZ 1.

In the concrete realization, the three-phase connecting line between three-phase circuit breaker QF11 and automatic voltage regulator TYQ1 still is connected with a phase sequence protector XQ 1.

The method specifically comprises the following steps: a live wire L1 between the three-phase circuit breaker QF11 and the automatic voltage regulator TYQ1 is connected with a port 3 of the phase sequence protector XQ 1;

a live wire L2 between the three-phase circuit breaker QF11 and the automatic voltage regulator TYQ1 is connected with a port 4 of the phase sequence protector XQ 1;

a live wire L3 between the three-phase circuit breaker QF11 and the automatic voltage regulator TYQ1 is connected with a port 11 of the phase sequence protector XQ 1;

the first power input terminal Uin1 has a neutral terminal (i.e., N line) connected to port 21 of the phase sequence protector XQ 1;

port 12 and port 22 of the phase sequence protector XQ1 are directly connected.

In particular, the contactor KM11 and the contactor KM12 are respectively used for accessing a positive phase sequence and a negative phase sequence;

wherein, the port 11 of the phase sequence protector XQ1 is connected with two input ends of a rotary switch SA 11;

two output ends of the rotary switch SA11 are respectively connected with one end of an indicator lamp HL11 and one end of an indicator lamp HL 12;

the other end of the indicator lamp HL11 and the other end of the indicator lamp HL12 are respectively connected with one end of a dynamic breaking button K12 and one end of a dynamic breaking button K11;

the other end of the dynamic breaking button K12 and the other end of the dynamic breaking button K11 are connected with the port 21 of the phase sequence protector XQ1 after confluence and intersection.

In the concrete implementation, an indicator lamp HL11 and an indicator lamp HL12 are respectively connected with a contactor coil X11 and a contactor coil X12 in parallel;

in particular, a voltmeter PV11, a voltmeter PV12 and a voltmeter PV13 are respectively connected to each phase of connection circuit between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF 12;

each phase of connecting circuit between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF12 is also respectively connected with an ammeter PA11, an ammeter PA12 and an ammeter PA 13;

current transformers TA11, TA12 and TA13 are respectively connected in series to the ammeter PA11, the ammeter PA12 and the ammeter PA 13.

In the utility model, in the concrete implementation, as shown in fig. 1, for the second power input end Uin2, the live wire end (including three-phase live wire L1, L2 and L3) that the second power input end Uin2 has is connected with three-phase circuit breaker QF21, manual voltage regulator TYQ2, three-phase circuit breaker QF22 and contactor KM21 in turn;

the contactor KM21 is connected in parallel with a contactor KM 22;

the contactor KM21 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS21, one end of an isolating switch QS22 and one end of an isolating switch QS 23;

the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are connected with live wire ends (comprising three-phase live wires L1, L2 and L3) which are arranged at the input end of a second path of power supply serving as a power supply screen of the tested equipment through a second group of connecting terminals DZ 2;

in a specific implementation, a zero line end (i.e., an N line) of the second power input end Uin2 is connected to a zero line end (i.e., an N line) of the second power input end of the power screen of the device under test through the second group of connecting terminals DZ 2.

In particular, the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are also connected with three live wire ends (namely, A, B, C ends) of the power socket GZ 2;

the second power input terminal Uin1 has a neutral terminal N (i.e., an N-wire) that is also connected to the neutral terminal (i.e., an N-terminal) of the power socket GZ 2.

In the concrete realization, the three-phase connecting line between three-phase circuit breaker QF21 and manual voltage regulator TYQ2 still is connected with a phase sequence protector XQ 2.

The method specifically comprises the following steps: a live wire L1 between the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 is connected with a port 3 of the phase sequence protector XQ 2;

a live wire L2 between the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 is connected with a port 4 of the phase sequence protector XQ 2;

a live wire L3 between the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 is connected with a port 11 of the phase sequence protector XQ 2;

the second power input terminal Uin1 has a neutral terminal (i.e., N line) connected to the port 21 of the phase sequence protector XQ 2;

port 12 and port 22 of the phase sequence protector XQ2 are directly connected.

In particular, the contactor KM21 and the contactor KM22 are respectively used for accessing a positive phase sequence and a negative phase sequence;

wherein, the port 11 of the phase sequence protector XQ2 is connected with two input ends of a rotary switch SA 21;

two output ends of the rotary switch SA21 are respectively connected with one end of an indicator lamp HL21 and one end of an indicator lamp HL 22;

the other end of the indicator lamp HL21 and the other end of the indicator lamp HL22 are respectively connected with one end of a dynamic breaking button K22 and one end of a dynamic breaking button K21;

the other end of the dynamic breaking button K22 and the other end of the dynamic breaking button K21 are connected with the port 21 of the phase sequence protector XQ2 after confluence and intersection.

In the concrete implementation, an indicator lamp HL21 and an indicator lamp HL22 are respectively connected with a contactor coil X21 and a contactor coil X22 in parallel;

in particular, the port 11 of the phase sequence protector XQ2 is respectively connected with one end of a boost button SB21 and one end of a buck button SB 22;

the other end of the voltage boosting button SB21 and the other end of the voltage reducing button SB22 are respectively connected with one end of an indicator lamp HL23 and one end of an indicator lamp HL 24;

the other end of the indicator lamp HL23 and the other end of the indicator lamp HL24 are connected with the port 21 of the phase sequence protector XQ2 after being converged and intersected.

In the concrete implementation, an indicator lamp HL23 and an indicator lamp HL24 are respectively connected with a contactor coil X23 and a contactor coil X24 in parallel;

in particular, a live wire L1, a live wire L2 and a live wire L3 between a three-phase power supply input end U1, a three-phase power supply input end V1 and a three-phase power supply input end W1 of the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 are respectively connected with three input ends of the three-phase circuit breaker QF 23;

three output ends of the three-phase breaker QF23 are respectively connected with three input ends (U, V and W end) of a voltage regulator motor M through a contactor KM 23;

the contactor KM23 is connected in parallel with a contactor KM 24;

the three-phase power output end U2, V2 and W2 of the manual voltage regulator TYQ2 are respectively connected with a wiring terminal U, V and W of a voltage regulator motor M;

it should be noted that the input end of the three-phase power supply of the manual voltage regulator TYQ2 is U1, V1, W1, and the output end thereof is U2, V2, W2, and the port is a terminal of the device and is used for connecting wires.

In the concrete implementation, a voltage meter PV21, a voltage meter PV22 and a voltage meter PV23 are respectively connected to each phase of connecting line between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF 22;

each phase of connecting line between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF22 is also respectively connected with an ammeter PA21, an ammeter PA22 and an ammeter PA 23;

current transformers TA21, TA22 and TA23 are respectively connected in series to the ammeter PA21, the ammeter PA22 and the ammeter PA 23.

In the present invention, in terms of specific implementation, as shown in fig. 1, an indicator light sub-circuit is further connected between the fire line end L1 and the zero line end N of the first power input end Uin 1;

the indicator lamp sub-circuit comprises switches K1 and K2 and an indicator lamp HL 2;

the switch K1 and the indicator light HL1 are mutually connected in series to form a first branch circuit;

one end of the first branch is connected with a live wire end L1 arranged at a first power supply input end Uin1, and the other end of the first branch is connected with a zero wire end N arranged at a first power supply input end Uin 1; the switch K2 and the indicator light HL2 are mutually connected in series to form a second branch circuit;

the second branch and the first branch are connected in parallel.

In the present invention, in particular, referring to fig. 1, the first power input terminal Uin1 has four power sockets XS1, XS2, XS3 and XS4 connected between the live line terminal L3 and the neutral line terminal N;

four power outlets XS1, XS2, XS3 and XS4 are connected in parallel with each other.

In the present invention, in terms of specific implementation, referring to fig. 1, a first path of power output end and a second path of power output end, which are used as power screens of the devices under test, are connected to an input end of a probe power supply unit;

the probe power supply unit is used for being connected with probes of instruments such as an oscilloscope and the like.

The utility model discloses in, in specifically realizing, it is shown with reference to fig. 10, fig. 11, to the utility model discloses a testboard, it includes the cabinet body, on the cabinet body, can install each electronic component that above-mentioned circuit diagram shows, and the position of external electronic component of specific needs and pilot lamp can be adjusted according to user's needs.

In order to understand the technical solution of the present invention more clearly, the working principle of the present invention is explained below.

The utility model discloses a power screen input combined test platform through operation test platform's different functional module, can realize the power screen functional verification that corresponds. The utility model discloses mainly include the test function in following seven aspects.

The automatic switching test function of the one-way input power supply and the two-way input power supply.

Referring to fig. 3, the utility model discloses a two way input power of testboard all sets up the three-phase circuit breaker, and the disconnection can simulate the outage all the way wantonly, and the break-make function of using the circuit breaker can realize two way power automatic switching function verifications.

And secondly, testing the overvoltage and undervoltage protection of the two paths of power supplies.

Referring to fig. 4, the voltage regulation functions of the automatic voltage regulator TYQ1 and the manual voltage regulator TYQ2 are applied to realize the overvoltage and undervoltage function verification of the two-way power supply.

Wherein, the input power supply of the first path adopts a 100KVA automatic voltage regulator, and the voltage can be automatically regulated through a voltage boosting button and a voltage reducing button on a control panel of the voltage regulator;

the input power supply of the second path adopts an existing 63KVA three-phase induction voltage regulator in an electric fitting workshop, and the positive rotation and the negative rotation of a voltage regulator motor are controlled by using contactors KM23 and KM24 and a button, so that the voltage boosting and reducing functions are realized.

The utility model discloses in, on specifically realizing, automatic voltage regulator TYQ1 adopts current automatic voltage regulator, for example can adopt the 100KVA automatic voltage regulator of the limited company's production of the Aipus power.

The utility model discloses in, on specifically realizing, manual voltage regulator TYQ2 adopts current manual voltage regulator, for the ripe equipment of prior art.

And thirdly, an input power supply open-phase protection test function.

Referring to fig. 5, the function verification of the open-phase protection of the input power supply is realized by applying the on-off and phase sequence protector (XQ1 and XQ2) alarm functions of the isolating switches (QS11, QS12, QS13, QS21, QS22 and QS 123). As shown in fig. 5, an isolating switch is installed on each phase voltage of the two input power supplies respectively for controlling each phase to be disconnected; each path of input power supply is provided with a phase sequence protector and an indicator light respectively and is used for displaying phase failure alarm of the power supply.

The utility model discloses in, in the concrete realization, phase sequence protector XQ1 and XQ2 are current phase sequence protector, for example can be the BDS type input of Tianjin railway signal Limited production and cross undervoltage protection ware XQ1 and XQ 2.

In the present invention, as shown in fig. 1, the ports 3, 11, 4, and 21 of the phase sequence protectors XQ1 and XQ2 serve as power input terminals, and the three-phase power connection mode is 3 for a-phase, 11 for B-phase, 4 for C-phase, and 21 for N-line. The ports 21 and 22 of the phase sequence protectors XQ1 and XQ2 are phase sequence judgment interfaces, and the judgment of the phase sequence is carried out by short-sealing the joints of the ports 12 and 22.

And fourthly, performing a test function of the input power supply phase-dislocation protection.

Referring to fig. 6, the control function of the contactors (KM12, KM11, KM21 and KM22) and the alarm function of the phase sequence protectors (XQ1 and XQ2) are used to realize the verification of the phase error protection function of the input power supply D. Each power supply is provided with 2 contactors which are respectively connected with a positive phase sequence and a wrong phase sequence, and the contactors and the rotary switches are used for controlling the positive phase sequence and the wrong phase sequence of the input power supply and simulating the wrong phase of the input power supply;

in addition, each power supply is provided with a phase sequence protector and an indicator light for displaying the phase error alarm of the power supply.

And fifthly, monitoring the switching time of the two paths of input power supplies through an interface function.

Referring to fig. 7, a power socket and a probe power unit (i.e., a probe tool) are applied to realize the function of the two-input power conversion time monitoring interface of the power screen.

The power sockets (XS1, XS2, XS3 and XS4) arranged on four guide rails are accessed from an input power end and led to the test table for supplying power to the test equipment; a probe tool (namely a probe power supply unit) can be designed by using the power supply unit and the insulating base, is led to the test table top and is used for connecting probes of instruments such as an oscilloscope and the like.

It should be noted that the power panel is provided with two input power sources (a first input power source and a second input power source), the first input power source works in a normal state, when the first input power source is powered off, the system can automatically switch to the second input power source to supply power, in order to ensure that the output of the power panel is not powered off, the switching time from the first input power source to the second input power source is not more than 0.15s (standard requirement), and the time is the switching time of the two input power sources of the power panel (namely switching time).

For the utility model discloses a, the utility model discloses a testboard through using supply socket (XS1, XS2, XS3 and XS4), probe frock GZ1 and oscilloscope, can realize two way input power supply changeover time tests, and concrete operation process is as follows:

firstly, will the utility model discloses an output terminal 1D-11, 1D-12, 1D-13, 1D-14 and the power screen of testboard are the power input terminal L1, L2, L3, N link to each other all the way, the utility model discloses output terminal 2D-11, 2D-12, 2D-13, 2D-14 and power screen two-way input terminal L1, L2, L3, N of testboard link to each other, like this the utility model discloses the test is just as the input of power screen, and electric connection is accomplished to the power screen, operates this equipment and can simulate the various abnormal conditions of power screen input power.

Then, draw forth two power cords from the unsteady reserve output terminal of voltage of power screen and receive probe frock GZ 1's L and N power unit piece back, the oscilloscope probe presss from both sides to probe frock GZ 1's L and N power unit piece openly, can lead to the test point through probe frock GZ1 like this the utility model discloses on the test table face of testboard, convenient test. And then, inserting the power line of the oscilloscope into a power socket (any one of XS1, XS2, XS3 and XS4) for electrifying the oscilloscope.

Then, close the block terminal master switch, give the utility model discloses testboard and power screen power supply, the power screen is normally worked the back, the disconnection the utility model discloses circuit breaker QF12 of testboard (be used for simulating power screen input outage or other abnormal conditions), the power screen can be automatically followed the first input power work of the same kind and is converted into the work of second way input power supply this moment, the oscilloscope waveform is looked over to the disconnection circuit breaker simultaneously, when the oscilloscope waveform appears changing, press the screen capture button, the current change figure of intercepting, read and take notes the change time on the waveform (the abscissa of oscilloscope waveform is the time, the ordinate is voltage amplitude), this moment is the conversion of two way input power supply (also be exactly the first input power supply of the same kind switches to second way input power supply) time.

It should be said still that, so will measure two way input power supply changeover time of power screen, because stipulate in power screen standard TB/T1528.1-2018, the changeover time of two way input power supplies of power screen should not be greater than 0.15s, and the power screen must test two way input power supply changeover time before dispatching from the factory, uses the utility model discloses a comprehensive test platform tests the changeover time of two way input power supplies, can save test preparation time, convenient and fast more.

And sixthly, an external power grid electric quantity monitoring interface function.

Referring to fig. 8, a power socket (or a probe fixture) and a connection terminal are used to implement the function of the external power grid power monitoring interface. Two input power lines are bent out of radian by using two groups of wiring terminals and led to a test table board, so that current test is facilitated.

And seventhly, displaying the voltage and the current.

Referring to fig. 9, a voltmeter, a current meter and a current transformer are applied to realize the voltage and current display function of the two input power supplies. Each phase of the two input power supplies is connected with a 0.5-level display voltmeter and an ammeter respectively, and the ammeter is matched with a mutual inductor and used for displaying the voltage value and the current value of each phase of the two input power supplies.

To sum up, compare with prior art, the utility model provides a pair of power screen input combined test platform, its structural design science can be through different functional module, realizes the detection function to excessive pressure, under-voltage, wrong phase and open phase of power screen input power (be three phase current) has great practical meaning.

Additionally, the utility model provides a power screen input combined test platform can simulate the input power condition that provides the power screen complete machine debugging of china's railway industry standard TB/T1528 regulation and the inspection of dispatching from the factory, need not manual regulation, can show reduction staff's intensity of labour.

Furthermore, the utility model provides a power screen input combined test board can also measure the conversion time of two way input power that the power screen has, satisfies the power screen functional requirement of dispatching from the factory test better.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The power supply screen input comprehensive test board is characterized by comprising a first power supply input end Uin1, a second power supply input end Uin2, a first power supply output end Uout1 and a second power supply output end Uout 2;

the first power supply input end Uin1 and the second power supply voltage input end Uin2 are used for being connected with an external power grid;

the first power output end Uout1 and the second power output end Uout2 are used for connecting a first path of power input end and a second path of power input end which are used as power screens of the tested equipment;

for the first power input end Uin1, the live wire end of the first power input end Uin1 is connected with a three-phase circuit breaker QF11, an automatic voltage regulator TYQ1, a three-phase circuit breaker QF12 and a contactor KM11 in sequence;

the contactor KM11 is connected in parallel with a contactor KM 12;

the contactor KM11 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS11, one end of an isolating switch QS12 and one end of an isolating switch QS 13;

the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are connected with a live wire end which is arranged at a first path of power supply input end of a power supply screen of the tested equipment through a first group of connecting terminals DZ 1;

for the second power input end Uin2, the live wire end of the second power input end Uin2 is connected with a three-phase circuit breaker QF21, a manual voltage regulator TYQ2, a three-phase circuit breaker QF22 and a contactor KM21 in sequence;

the contactor KM21 is connected in parallel with a contactor KM 22;

the contactor KM21 is provided with a three-phase power supply output end which is respectively connected with one end of an isolating switch QS21, one end of an isolating switch QS22 and one end of an isolating switch QS 23;

the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are connected with a live wire end which is arranged at the input end of a second path of power supply of a power supply screen of the tested equipment through a second group of connecting terminals DZ 2.

2. The power supply panel input comprehensive test board according to claim 1, characterized in that the first power supply input terminal Uin1 has a zero line end connected with a zero line end of the first power supply input terminal of the power supply panel as the device under test through a first set of connection terminals DZ 1;

the other end of the isolating switch QS11, the other end of the isolating switch QS12 and the other end of the isolating switch QS13 are also connected with three live wire ends of a power socket GZ 1;

the first power input terminal Uin1 has a neutral terminal which is also connected to the neutral terminal of the power socket GZ 1.

3. The power panel input comprehensive test bench of claim 2, wherein a phase sequence protector XQ1 is further connected to a three-phase connection line between the three-phase circuit breaker QF11 and the automatic voltage regulator TYQ 1.

4. The power panel input comprehensive test board according to claim 3, wherein the port 11 of the phase sequence protector XQ1 is connected with two input ends of a rotary switch SA 11;

two output ends of the rotary switch SA11 are respectively connected with one end of an indicator lamp HL11 and one end of an indicator lamp HL 12;

the other end of the indicator lamp HL11 and the other end of the indicator lamp HL12 are respectively connected with one end of a dynamic breaking button K12 and one end of a dynamic breaking button K11;

the other end of the dynamic breaking button K12 and the other end of the dynamic breaking button K11 are connected with the port 21 of the phase sequence protector XQ1 after confluence and intersection.

5. The power panel input comprehensive test bench of claim 1, wherein a voltmeter PV11, a voltmeter PV12 and a voltmeter PV13 are respectively connected to each phase connection line between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF 12;

each phase of connecting circuit between the automatic voltage regulator TYQ1 and the three-phase circuit breaker QF12 is also respectively connected with an ammeter PA11, an ammeter PA12 and an ammeter PA 13;

current transformers TA11, TA12 and TA13 are respectively connected in series to the ammeter PA11, the ammeter PA12 and the ammeter PA 13.

6. The power supply panel input comprehensive test board according to claim 1, characterized in that the second power supply input terminal Uin2 has a zero line end connected with a zero line end of the second power supply input terminal of the power supply panel as the device under test through a second set of connection terminals DZ 2;

the other end of the isolating switch QS21, the other end of the isolating switch QS22 and the other end of the isolating switch QS23 are also connected with three live wire ends of a power socket GZ 2;

the second power input end Uin1 has a zero line end N, and is also connected with the zero line end of the power socket GZ 2;

and a phase sequence protector XQ2 is also connected to a three-phase connecting line between the three-phase circuit breaker QF21 and the manual voltage regulator TYQ 2.

7. The power panel input comprehensive test board according to claim 6, wherein the port 11 of the phase sequence protector XQ2 is connected with two input ends of a rotary switch SA 21;

two output ends of the rotary switch SA21 are respectively connected with one end of an indicator lamp HL21 and one end of an indicator lamp HL 22;

the other end of the indicator lamp HL21 and the other end of the indicator lamp HL22 are respectively connected with one end of a dynamic breaking button K22 and one end of a dynamic breaking button K21;

the other end of the dynamic breaking button K22 and the other end of the dynamic breaking button K21 are connected with the port 21 of the phase sequence protector XQ2 after confluence and intersection.

8. The power panel input comprehensive test bench of claim 6, wherein live lines L1, L2 and L3 between three-phase power input terminals U1, V1 and W1 of the three-phase circuit breaker QF21 and the manual voltage regulator TYQ2 are respectively connected with three input terminals of the three-phase circuit breaker QF 23;

three output ends of the three-phase breaker QF23 are respectively connected with three input ends of a voltage regulator motor M through a contactor KM 23;

the contactor KM23 is connected in parallel with a contactor KM 24;

the three-phase power output ends U2, V2 and W2 of the manual voltage regulator TYQ2 are respectively connected with a wiring terminal U, V and a wiring terminal W of a voltage regulator motor M.

9. The power panel input comprehensive test bench of claim 6, wherein a voltmeter PV21, a voltmeter PV22 and a voltmeter PV23 are respectively connected to each phase connection line between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF 22;

each phase of connecting line between the manual voltage regulator TYQ2 and the three-phase circuit breaker QF22 is also respectively connected with an ammeter PA21, an ammeter PA22 and an ammeter PA 23;

current transformers TA21, TA22 and TA23 are respectively connected in series to the ammeter PA21, the ammeter PA22 and the ammeter PA 23.

10. The power screen input comprehensive test bench of claim 1, wherein the first power input terminal Uin1 has four power sockets XS1, XS2, XS3 and XS4 connected between the live end L3 and the neutral end N;

four power sockets XS1, XS2, XS3 and XS4 are connected in parallel with each other;

the first path of power supply output end and the second path of power supply output end of the power supply screen as the tested equipment are connected with the input end of a probe power supply unit;

the probe power supply unit is used for being connected with a probe of the oscilloscope.

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