Electric shock prevention device of combiner box production test system

Abstract

The utility model discloses an anti-electric shock device of a combiner box production test system, which comprises a high-voltage direct-current power supply, a direct-current circuit breaker, an indicating lamp, a 24V direct-current power supply, an RS485 relay and a USB-to-RS485 converter, the negative electrode of the high-voltage direct-current power supply is connected with the negative electrode of a combiner box to be tested, and the positive electrode of the high-voltage direct-current power supply is connected with a first interface of the direct-current circuit breaker; a second interface of the direct-current circuit breaker is connected with the positive electrode of a combiner box to be tested, the positive electrode of the 24V direct-current power supply is connected with a third interface of the direct-current circuit breaker, a COM port of the relay and the positive electrode of the relay, a fourth interface of the direct-current circuit breaker is connected with the positive electrode of the indicator lamp, and an NO port of the relay is connected with one end of a shunt release in the direct-current circuit breaker. The other end of the shunt release, the negative electrode of the indicating lamp and the negative electrode of the relay are connected with the negative electrode of the 24V DC power supply. A port A and a port B of the relay are connected with a computer through a USB-to-RS485 converter. According to the utility model, after the test is completed, the upper computer sends an instruction to automatically cut off power, thereby avoiding electric shock accidents.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of anti-electric shock devices, specifically a kind of anti-electric shock device for busbar chamber production test system. BACKGROUND

[0002] Circuit breaker is an important power equipment, which can be used for infrequent starting power supply, and manually switching circuit.

[0003] When testing busbar chamber, DC high-voltage power supply is used, and manual closing and opening are needed to control power-on and power-off. When problems occur during testing, it is easy to forget to power off when looking for the cause. If the operator directly touches the device in the box, checks the wiring, or accidentally touches, etc., an electric shock accident will occur.

[0004] Therefore, when producing and testing, the electric shock situation should be fully considered, and appropriate design scheme and technical means should be selected to prevent electric shock due to forgetting to power off. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides an anti-electric shock device for busbar chamber production test system to prevent electric shock during production and testing.

[0006] The technical scheme of the utility model is as follows: the anti-electric shock device for busbar chamber production test system comprises a high-voltage DC power supply, a DC circuit breaker, an indicator light, a 24V DC power supply, an RS485 relay, and a USB-to-RS485 converter. The negative electrode of the high-voltage DC power supply is connected to the negative electrode of the busbar chamber to be tested, and the positive electrode of the high-voltage DC power supply is connected to the first interface of the DC circuit breaker. The second interface of the DC circuit breaker is connected to the positive electrode of the busbar chamber to be tested. The positive electrode of the 24V DC power supply is connected to the third interface of the DC circuit breaker, the COM port of the RS485 relay, and the positive electrode of the RS485 relay. The fourth interface of the DC circuit breaker is connected to the positive electrode of the indicator light. One end of the NO port of the RS485 relay is connected to the DC circuit breaker, and the other end of the DC circuit breaker, the negative electrode of the indicator light, and the negative electrode of the RS485 relay are all connected to the negative electrode of the 24V DC power supply. The A and B signal ports of the RS485 relay are connected to the USB port of the computer through the USB-to-RS485 converter. When the DC circuit breaker is closed, the first interface and the second interface are one passage, and the third interface and the fourth interface are one passage.

[0007] Specifically, the busbar chamber to be tested is a 1500V busbar chamber, and the high-voltage DC power supply is a 1500V high-voltage DC power supply.

[0008] Specifically, the DC circuit breaker uses GM5-40P series photovoltaic special non-polarity circuit breaker.

[0009] The utility model has the following advantages:

[0010] 1, the indicating lamp can show whether the confluence box is in the electrified state, and the electrification condition is very intuitively reflected.

[0011] 2, the production test system can automatically power off after the test is completed, the instruction of the RS485 relay is sent through the host computer, the GM5-40P DC circuit breaker is opened, and then the to-be-tested confluence box is powered off. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the electrical wiring diagram of the utility model. DETAILED DESCRIPTION

[0013] The utility model will be further described below in combination with the drawings.

[0014] As Figure 1 Indicated, the utility model includes high voltage DC power supply 2, DC circuit breaker 3, indicating lamp 4, 24V DC power supply 5, RS485 relay 6 and USB to RS485 converter 7. In the embodiment, the to-be-tested confluence box 1 is 1500V confluence box, the high voltage DC power supply 2 is 1500V high voltage DC power supply, and the DC circuit breaker 3 adopts GM5-40P. When GM5-40P is closed, the first interface and the second interface are a passageway, the third interface and the fourth interface are a passageway, and the closing and opening states of the two passageways are synchronous. GM5-40P has a separate excitation release at the right end.

[0015] When using, wiring can be carried out according to the following order:

[0016] 1. the negative pole of the to-be-tested confluence box 1 is connected with the negative pole of the high voltage DC power supply 2;

[0017] 2. the positive pole of the high voltage DC power supply 2 is connected with the first interface of the GM5-40P DC circuit breaker 3;

[0018] 3. the second interface of the DC circuit breaker 3 is connected with the positive pole of the to-be-tested confluence box 1;

[0019] 4. the positive pole of the 24V DC power supply 5 is connected with the third interface of the DC circuit breaker 3, the COM port (common end) of the RS485 relay 6 and the positive pole of the RS485 relay 6 respectively;

[0020] 5. the fourth interface of the DC circuit breaker 3 is connected with the positive pole of the indicating lamp 4, and the negative pole of the indicating lamp 4 is connected with the negative pole of the 24V DC power supply 5;

[0021] 6. Connect the NO port (normally open end) of RS485 relay 6 with one end of the DC circuit breaker 3 shunt trip, and the other end of the shunt trip is connected with the negative pole of 24V DC power supply 5;

[0022] 7. Connect the negative pole of RS485 relay 6 with the negative pole of 24V DC power supply 5;

[0023] 8. Connect the A and B signal ports of RS485 relay 6 with the A and B signal ports of USB to RS485 converter 7 respectively;

[0024] 9. Connect the USB port of USB to RS485 converter 7 with the USB port of PC 8 (the host computer installed with production test software).

[0025] The working process of the utility model is as follows: first, turn on 1500V high-voltage DC power supply 2 and 24V DC power supply 5, manually open the DC circuit breaker 3 during testing, power on the 1500V to-be-tested bus box 1, and the indicator light 4 is on, indicating that the bus box is in the power-on state. The host computer tests. After the host computer test is completed, the "open relay" instruction is automatically sent, the RS485 relay 6 is attracted, the 24V DC power supply 5 provides DC 24V to the right end shunt trip of the DC circuit breaker 3, so that the DC circuit breaker 3 is tripped, the to-be-tested bus box 1 is powered off, and the indicator light 4 is extinguished, indicating that the bus box is in the power-off state. In this way, it is prevented that the test is completed and the power is not turned off, resulting in electric shock. The host computer sends the "close relay" instruction again, and the 24V voltage of the right end shunt trip of the DC circuit breaker 3 is disconnected. Then the next closing can be carried out.

Claims

1. An anti-electric shock device for a combiner box production and testing system, characterized in that, The system includes a high-voltage DC power supply, a DC circuit breaker, an indicator light, a 24V DC power supply, an RS485 relay, and a USB-to-RS485 converter. The negative terminal of the high-voltage DC power supply is connected to the negative terminal of the combiner box under test, and the positive terminal of the high-voltage DC power supply is connected to the first interface of the DC circuit breaker. The second interface of the DC circuit breaker is connected to the positive terminal of the combiner box under test. The positive terminal of the 24V DC power supply is connected to the third interface of the DC circuit breaker, the COM port of the RS485 relay, and the positive terminal of the RS485 relay. The fourth interface of the DC circuit breaker is connected to the positive terminal of the indicator light. The NO port of the RS485 relay is connected to one end of the shunt trip unit in the DC circuit breaker. The other end of the shunt trip unit, the negative terminal of the indicator light, and the negative terminal of the RS485 relay are all connected to the negative terminal of the 24V DC power supply. The A and B signal ports of the RS485 relay are connected to the USB port of a computer via the USB-to-RS485 converter. When the DC circuit breaker is closed, the first and second interfaces form a single circuit, and the third and fourth interfaces form a single circuit.

2. The anti-electric shock device of the combiner box production and testing system as described in claim 1, characterized in that, The combiner box under test is a 1500V combiner box, and the high-voltage DC power supply is a 1500V high-voltage DC power supply.

3. The anti-electric shock device of the combiner box production and testing system as described in claim 1, characterized in that, The DC circuit breaker model is GM5-40P.

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