CN115313653A - A simulation platform training system with intelligent fusion terminal as the core - Google Patents

Abstract

The invention discloses a simulation station area training system with an intelligent fusion terminal as the core, including a fault simulation platform, a simulation dispatch master station, a transformer and a line pole, a JP cabinet and a loading box. , fuse-type isolating switch, 3 simulated residual current action protectors, molded case circuit breakers, State Grid I-type concentrators, smart capacitors, wireless temperature measurement devices, simulated low-voltage shunt monitoring units, temperature and humidity sensors, noise sensors, The loading box is built with an AC power supply simulation module, a network switch, a serial port server, a plurality of fault simulation modules and a power supply module. According to the design of the low-voltage power distribution station area of the typical rural network, the trained staff can not only deeply understand the basic structure and internal wiring of the low-voltage station area on site, but also learn the functions, installation and maintenance of various low-voltage intelligent devices.

Description

A simulation station area training system with intelligent fusion terminal as the core

technical field

The invention relates to an intelligent fusion terminal, in particular to a simulated area training system with the intelligent fusion terminal as the core.

Background technique

The intelligent fusion terminal is an important edge computing node for power distribution and an edge device of the "cloud-pipe-edge-end" architecture of the basic intelligent IoT system for building the low-voltage power distribution Internet of Things. It has the functions of edge IoT, state perception and data collection, and is the support of State Grid's marketing, power distribution and emerging fields. At present, intelligent fusion terminals have been put into operation on a large scale in various provinces and cities. However, as a new type of intelligent equipment, operation and maintenance personnel lack relevant training experience, and the existing simulation training systems are mostly based on a single set of equipment, which lacks support for intelligent fusion terminals. Comprehensive reproduction and fault simulation of the core intelligent station area.

Contents of the invention

The purpose of the present invention is to provide a simulation station area training system with intelligent fusion terminals as the core, which can truly reproduce the operating conditions of low-voltage intelligent station areas with intelligent fusion terminals as key nodes, and meet the needs of fusion terminal project construction and operation and maintenance personnel To meet the needs of skill training, provide operation and maintenance personnel with a real, safe and complete application scenario for training, learning and troubleshooting of intelligent equipment in low-voltage station areas.

The technical solution to realize the purpose of the present invention is: a simulation station area training system with an intelligent fusion terminal as the core, including a fault simulation platform, a simulation dispatching master station, a transformer and a pole, a JP cabinet and a loading box, the JP The cabinet is equipped with intelligent fusion terminal, fuse type isolating switch, 3 simulated residual current action protectors, molded case circuit breaker, State Grid I-type concentrator, smart capacitor, wireless temperature measuring device, simulated low-voltage shunt monitoring unit, temperature A humidity sensor and a noise sensor, the loading box is equipped with an AC power simulation module, a network switch, a serial port server, a plurality of fault simulation modules and a power supply module;

The fault simulation platform is used to send control instructions to the AC power simulation module, control the electrical value of the electrical circuit, and at the same time generate a fault preset instruction according to the collected data, and send the fault preset instruction to each fault simulation module and simulation Residual current action protector, simulated low-voltage shunt monitoring unit;

The AC power simulation module is controlled by the fault simulation platform, and simulates the abnormal situation of the electrical value of each electrical circuit in the low-voltage station area;

The fault simulation modules, the simulated residual current action protector, and the simulated low-voltage shunt monitoring unit send alarm information to the intelligent fusion terminal after sensing the fault;

The intelligent fusion terminal collects real-time data and alarm information of the wireless temperature measuring device, temperature and humidity sensor, noise sensor, State Grid I-type concentrator, simulated residual current action protector, simulated low-voltage shunt monitoring unit, and smart capacitor, Send to the fault simulation platform and the simulation dispatching master station to simulate the on-site operating conditions of the low-voltage distribution station area.

Further, there are 5 fault simulation modules, and the fault simulation is carried out through relays. The first fault simulation module is connected between the State Grid I-type concentrator and the intelligent fusion terminal to simulate a fault event in a station area; the second The fault simulation module is connected to both ends of the fuse-type isolating switch to simulate the fault event of the fuse-type isolating switch; the third fault simulation module is connected between the intelligent fusion terminal and the simulated residual current action protector for Simulate the communication failure event between the intelligent fusion terminal and the simulated residual current action protector; the fourth fault simulation module is connected between the intelligent fusion terminal and the simulated low-voltage shunt monitoring unit, and simulates the intelligent fusion terminal and the simulated low-voltage shunt Monitoring unit communication fault event; the fifth fault simulation module is connected between the intelligent fusion terminal, the wireless temperature measuring device, and the smart capacitor, and simulates a communication fault event between the intelligent fusion terminal, the wireless temperature measuring device, and the smart capacitor.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention is designed according to the typical rural low-voltage distribution station area, and contains various intelligent devices such as intelligent fusion terminal, simulated residual current action protector, and simulated low-voltage shunt monitoring unit. The trained staff can not only deeply understand the on-site low-voltage station area Basic structure, internal wiring, you can also learn the functions, installation and maintenance of various low-voltage intelligent equipment;

2. The present invention can repeatedly simulate a variety of faults in the station area, and strengthen the logical thinking and hands-on ability of the operation and maintenance personnel in on-site fault handling;

3. The present invention takes the intelligent fusion terminal of the station area as the key node, connects various intelligent devices, collects real-time data and status information of each line in the station area, and sends them to the simulation dispatching master station; the operation and maintenance personnel can know in time through the simulation dispatching master station The current operating status and real-time alarm information of the station area, and at the same time understand the working mode of the on-site intelligent low-voltage station area;

4. The invention truly reproduces the operating conditions of the low-voltage intelligent station area with the intelligent fusion terminal as the key node, and is equipped with a simulation dispatching master station, a fault simulation platform, a simulated residual current action protector, and a simulated low-voltage shunt monitoring unit, etc. A variety of intelligent equipment can repeatedly simulate the faults of various low-voltage station areas on site, and the operation faults of various low-voltage intelligent equipment.

Description of drawings

Figure 1 is the overall architecture diagram of the system.

Figure 2 is a functional structure diagram of the fault simulation platform.

Figure 3 is a general architecture diagram of fault simulation.

Figure 4 is a fault simulation architecture diagram of an intelligent fusion terminal.

Fig. 5 is a schematic structural diagram of an execution unit for switching incoming line voltage of a fusion terminal.

Fig. 6 is a fault simulation framework diagram of a simulated residual current operated protector.

Fig. 7 is a fault simulation architecture diagram of the simulated low-voltage shunt monitoring unit.

Detailed ways

Example 1

A simulation area training system with intelligent fusion terminal as the core proposed in this embodiment includes a fault simulation platform, a simulation dispatching master station, transformers and utility poles, a JP cabinet, and a loading box. The JP cabinet refers to Jiangsu 200kVA low-voltage comprehensive The distribution box is customized according to the bidding specification, with one input and three outputs. The main equipment in the cabinet includes: intelligent fusion terminal, fuse type isolating switch, simulated residual current action protector (3 pieces), molded case circuit breaker, and State Grid I-type concentrator , smart capacitors, wireless temperature measuring devices, simulated low-voltage shunt monitoring units, temperature and humidity sensors, and noise sensors. The main equipment in the loading box includes: AC power supply simulation module, network switch, serial port server, multiple fault simulation modules, power module.

The smart capacitor includes a built-in controller, 2 groups of supplementary capacitors and 1 group of supplementary capacitors;

As shown in FIG. 1 , in the present invention, the fault simulation platform issues fault preset instructions to each fault simulation module, simulates residual current action protector, and simulates low-voltage shunt monitoring unit. Each fault simulation module, the simulated residual current action protector, and the simulated low-voltage shunt monitoring unit sense the fault and send it to the intelligent fusion terminal. The alarm information is sent to the fault simulation platform and the simulation scheduling master station. Trained staff can check the specific alarm information and carry out troubleshooting through the simulation dispatching master station.

As shown in Figure 2 and Figure 3, the fault simulation platform includes an acquisition unit, a fault simulation unit and a display unit, the acquisition unit is used for electrical quantity acquisition and state quantity acquisition, and the fault simulation unit includes an AC power module control unit , simulated residual current action protector control unit, fault simulation module control unit and simulated low-voltage shunt monitoring unit control unit, the fault simulation platform sends control instructions to the AC power supply simulation module through a network switch/serial port server, and the console District electrical circuit electrical value; send instructions for generating preset faults to the fault simulation module, the fault simulation modules, the simulated residual current action protector, and the simulated low-voltage shunt monitoring unit through the switch/serial port server; The network switch/serial port server interacts with the data of the intelligent fusion terminal to collect the electrical quantity and state quantity of the station area; the main wiring diagram and real-time alarm of the station area can also be viewed on the display interface of the fault simulation platform.

The AC power simulation module is controlled by the fault simulation platform through the network switch/serial port server, and simulates the abnormal situation of the electrical value of each electrical circuit in the low-voltage station area; Or failures such as phase failure, voltage loss, upper voltage limit, lower voltage limit, heavy load, overload, unbalanced three-phase voltage, unbalanced three-phase current, etc. of each outgoing branch circuit, all fault alarm information can be sent through the intelligent fusion terminal Send to the fault simulation platform and the simulation scheduling master station.

The fault simulation module 1 is connected between the State Grid I-type concentrator and the intelligent fusion terminal, receives the control command of the fault simulation platform through the switch/serial port server, executes the fault command through the action of the internal relay, and simulates the station area Fault events and alarm information are sent from the intelligent fusion terminal to the fault simulation platform and the simulation scheduling master station.

The intelligent fusion terminal can collect the wireless temperature measuring device, temperature and humidity sensor, noise sensor, State Grid I-type concentrator, simulated residual current action protector, low-voltage shunt monitoring unit, smart capacitor real-time data, and alarm information, through The switch/serial port server sends to the fault simulation platform and the simulation dispatching master station to completely simulate the on-site operating conditions of a typical low-voltage distribution station area.

The State Grid I-type concentrator can collect the data of the connected electric meter, and the data is sent to the fusion terminal through the 485 line, and then sent to the failure simulation platform and the simulation dispatching master station by the intelligent fusion terminal.

The temperature and humidity sensors and noise sensors can collect temperature, humidity and noise data in the station area, and the data are sent to the fusion terminal through the 485 line, and then sent to the fault simulation platform and simulation dispatching master station by the intelligent fusion terminal.

The fault simulation module 2 is connected to both ends of the fuse type isolating switch, receives the fault simulation platform control command through the switch/serial port server, executes the fault command through the action of the internal relay, and simulates the fault event of the fuse type isolating switch.

The fault simulation module 3 is connected between the intelligent fusion terminal and the simulated residual current action protector, accepts the control command of the fault simulation platform through the switch/serial port server, executes the fault command through the action of the internal relay, and simulates the The intelligent fusion terminal communicates fault events with the simulated residual current operated protector.

The simulated residual current action protector is installed in each branch of the outgoing line of the JP cabinet, and can collect the electrical data of the outgoing branch in the station area, and the data is sent to the fusion terminal through the 485 line, and then sent to the fault by the fusion terminal The simulation platform and the simulation dispatching master station; accept the control instructions of the fault simulation platform through the switchboard/serial port server, and simulate the fault situation of the outgoing line branch in the station area.

The fault simulation module 4 is connected between the intelligent fusion terminal and the simulated low-voltage shunt monitoring unit, accepts the control command of the fault simulation platform through the switch/serial port server, executes the fault command through the action of the internal relay, and simulates the The intelligent fusion terminal communicates fault events with the simulated low-voltage branch monitoring unit.

The simulated low-voltage branch monitoring unit is installed in each branch of the outgoing line of the JP cabinet, and can collect electrical data of the outgoing branch in the station area, and the data is sent to the intelligent fusion terminal through the 485 line, and then sent to the intelligent fusion terminal by the fusion terminal. Fault simulation platform and simulation dispatching master station; receiving the control instructions of the fault simulation platform through the switch/serial port server, and simulating the failure situation of the outgoing line branch in the station area.

The fault simulation module 5 is connected between the intelligent fusion terminal, the wireless temperature measuring device, and the smart capacitor, accepts the control command of the fault simulation platform through a switch/serial port server, and executes the fault command through an internal relay action, A communication failure event between the intelligent fusion terminal, the wireless temperature measuring device, and the intelligent capacitor is simulated.

The wireless temperature measuring device can collect the temperature of the copper bars in the station area, and the data is sent to the fusion terminal through the 485 line, and then sent to the fault simulation platform and the simulation dispatching master station by the intelligent fusion terminal.

The smart capacitor is installed on the outgoing line of the JP cabinet for reactive power compensation during the power transmission process, and the data is sent to the smart fusion terminal through the 485 line, and then sent to the fault simulation platform and the fault simulation platform by the fusion terminal. Simulation scheduling master station.

Example 2

Based on Embodiment 1, this embodiment provides a specific implementation manner of fault simulation of the intelligent fusion terminal.

As shown in Figure 4, the fault simulation module 1 is connected between the intelligent fusion terminal and the national network type I concentrator, and receives the failback instruction generated by the fault simulation platform fault through the switch/serial port server, Control the output of the AC analog module and the action of the relay, and simulate any phase open circuit, wrong polarity, and wrong phase sequence faults of the fusion terminal circuit power line. When the power supply is open circuit fault, it will generate a voltage loss/phase failure/power failure alarm message according to the specific situation. When the wrong polarity or wrong phase sequence fault occurs, voltage unbalance over-limit/current unbalance over-limit alarm information will be generated according to specific circumstances, and all fault alarm information will be sent to the fault simulation platform and simulation platform through the intelligent fusion terminal. Scheduling master.

As shown in Figure 5, it is the specific implementation method of the voltage loop fault simulation of the intelligent fusion terminal. There are three relays in the A, B, and C three-phase branches. Taking the A-phase voltage open circuit as an example, under normal power-on conditions , the normally closed contact of the relay in the phase A voltage circuit is closed, that is, the contacts 1M and 1H in relay 1, the contacts 2M and 2H in relay 2, and the contacts 3M and 3H in relay 3 are connected, and the phase A of the intelligent fusion terminal is normal Power-on. Through the fault simulation platform, the phase A voltage circuit disconnection fault preset instruction is issued, the relay 1 acts, the normally closed contact is disconnected, and the normally open contact is closed, that is, the contacts 1M and 1H in the relay 1 are disconnected, and the contact 1M is connected to 1F, and the A-phase voltage incoming line of the fusion terminal is open, and an A-phase loss-of-voltage alarm is sent.

Example 3

Based on Embodiment 1, this embodiment provides a specific implementation manner of fault simulation of the fuse type isolating switch.

Fuse type isolating switch is a current protector made according to the principle that after the current exceeds the specified value for a certain period of time, the heat generated by itself melts the melt, thereby disconnecting the circuit. However, the melting of the melt is one-time, which does not meet the requirements of the multiple failure simulation of the present invention. The fault simulation module 2 of the present invention can simulate the open circuit caused by the melting of the internal melt of the fuse-type isolating switch, and has multiple repeatable operability. The fault simulation module 2 receives the fault preset command of the fault simulation platform through the switch/serial port server, controls the action of the relay, and converts the normally closed contact to the normally open contact, which can simulate the open circuit caused by the melt melting of any phase of the switch, and the fault simulation After the end, the normally open contact turns back to the normally closed contact, simulating the normal working condition of the electrical circuit.

Example 4

Based on Embodiment 1, this embodiment provides a specific implementation manner of fault simulation of the simulated residual current operated protector. Because the structure of each outlet branch is the same, this embodiment only provides a specific implementation method for the simulated residual current operated protector fault simulation of one branch.

As shown in FIG. 6 , the fault simulation module 3 can simulate communication faults of the simulated RCD, including communication line disconnection faults and communication line wrong polarity faults. The fault simulation module 3 receives the control command of the fault simulation platform through the switch/serial port server, controls the relay action, and turns the normally closed contact to the normally open contact, which can simulate the disconnection of the 485 communication line or the fault of the wrong polarity. , through the fault simulation platform, the normally open contact of the control relay is turned back to the normally closed contact, and the communication returns to normal.

At the same time, the simulated residual current action protector can receive the fault simulation platform control instructions through the switch/serial port server. The fault simulation platform can set the electrical value of each phase of the simulated residual current action protector, and simulate the residual current protection action/alarm, zero-missing protection action/alarm, overload protection action/alarm, Undervoltage protection action/alarm, phase failure protection action/alarm and other electrical circuit faults. If the different values of the three-phase currents of the simulated residual current operated protector are given, so that the generated residual current value exceeds the residual current protection alarm limit, the residual current protection alarm can be generated. The fault simulation platform can control the disconnection of any phase relay inside the simulated residual current action protector to simulate the fault of the equipment itself.

All fault alarm information is sent to the fault simulation platform and the simulation scheduling master station through the intelligent fusion terminal.

Example 5

Based on Embodiment 1, this embodiment provides a specific implementation manner of fault simulation of the simulated low-voltage shunt monitoring unit.

As shown in Figure 7, each phase loop of the three outlet branches in the station area is equipped with the simulated low-voltage shunt monitoring unit, and the fault simulation module 4 can simulate the communication fault of the simulated residual current action protector, including Communication line disconnection fault and communication line wrong polarity fault. The fault simulation module 4 receives the control command of the fault simulation platform through the switch/serial port server, controls the action of the relay, and turns the normally closed contact to the normally open contact, which can simulate the disconnection of the 485 communication line or the fault of the wrong polarity. , through the fault simulation platform, the normally open contact of the control relay is turned back to the normally closed contact, and the communication returns to normal.

At the same time, the simulated low-voltage shunt monitoring unit can receive the fault simulation platform control instruction through the switch/serial port server. The simulated low-voltage shunt monitoring unit has no liquid crystal display, and can only display the current equipment status through the indicator light. Under normal conditions, the display light of the simulated low-voltage shunt monitoring unit is always green; the fault simulation platform can issue instructions to control the simulated low-voltage shunt monitoring unit to be in a fault state or in a configuration state, and the fault state display light is off. In the configuration state, the display light is flashing green, and the simulated low-voltage shunt monitoring unit cannot work normally in both states; the fault simulation platform can issue instructions to control the simulated low-voltage shunt monitoring unit to be in an overcurrent fault state, and display The light is solid red.

All fault alarm information is sent to the fault simulation platform and the simulation scheduling master station through the intelligent fusion terminal.

The invention truly reproduces the operating conditions of the low-voltage intelligent station area with the intelligent fusion terminal as the key node, and is equipped with a simulation dispatching master station, a fault simulation platform, a simulated residual current action protector, and a simulated low-voltage shunt monitoring unit. The equipment can repeatedly simulate the faults of various low-voltage station areas on site and the operation faults of various low-voltage intelligent equipment.

Claims (11)

1. A simulation platform area training system with an intelligent fusion terminal as the core, characterized in that it includes a fault simulation platform, a simulation dispatching master station, a transformer and a pole, a JP cabinet and a loading box, and the JP cabinet is built with an intelligent Fusion terminal, fuse type isolating switch, 3 simulated residual current action protectors, molded case circuit breaker, State Grid I-type concentrator, smart capacitor, wireless temperature measuring device, simulated low-voltage shunt monitoring unit, temperature and humidity sensor, noise A sensor, the loading box is equipped with an AC power simulation module, a network switch, a serial port server, a plurality of fault simulation modules and a power supply module; The fault simulation platform is used to send control instructions to the AC power simulation module, control the electrical value of the electrical circuit, and at the same time generate a fault preset instruction according to the collected data, and send the fault preset instruction to each fault simulation module and simulation Residual current action protector, simulated low-voltage shunt monitoring unit; The AC power simulation module is controlled by the fault simulation platform, and simulates the abnormal situation of the electrical value of each electrical circuit in the low-voltage station area; The fault simulation modules, the simulated residual current action protector, and the simulated low-voltage shunt monitoring unit send alarm information to the intelligent fusion terminal after sensing the fault; The intelligent fusion terminal collects real-time data and alarm information of the wireless temperature measuring device, temperature and humidity sensor, noise sensor, State Grid I-type concentrator, simulated residual current action protector, simulated low-voltage shunt monitoring unit, and smart capacitor, Send to the fault simulation platform and the simulation dispatching master station to simulate the on-site operating conditions of the low-voltage distribution station area. 2. according to claim 1, the emulation station district training system with the intelligent fusion terminal as the core is characterized in that, there are 5 fault simulation modules, and fault simulation is carried out by relays, and the first fault simulation module is connected to the Between the State Grid I-type concentrator and the intelligent fusion terminal, a fault event in the station area is simulated; the second fault simulation module is connected to both ends of the fuse-type isolating switch, and the fault event of the fuse-type isolating switch is simulated; the third The fault simulation module is connected between the intelligent fusion terminal and the simulated residual current action protector, and is used to simulate the communication fault event between the intelligent fusion terminal and the simulated residual current action protector; the fourth fault simulation module is connected to the Between the intelligent fusion terminal and the simulated low-voltage shunt monitoring unit, simulate the communication failure event between the intelligent fusion terminal and the simulated low-voltage shunt monitoring unit; the fifth fault simulation module is connected between the intelligent fusion terminal and the wireless temperature measuring device, Between the smart capacitors, a communication failure event between the smart fusion terminal, the wireless temperature measuring device, and the smart capacitor is simulated. 3. The simulation station area training system based on the intelligent fusion terminal as the core according to claim 2, wherein the simulation station area fault event of the first fault simulation module specifically includes: receiving the failure generated by the fault simulation platform By controlling the action of the relay, it simulates any phase open circuit, wrong polarity and wrong phase sequence faults of the intelligent fusion terminal circuit power line. When the power supply is open circuit fault, it will generate a voltage loss/phase failure/power failure alarm message, wrong polarity In the event of faults and wrong phase sequence faults, a voltage unbalance limit/current unbalance limit alarm message will be generated. 4. according to claim 3, the emulation station district training system with the intelligent fusion terminal as the core is characterized in that, the first fault simulation module comprises 9 relays, and each branch of the three phases is provided with 3 relays. In the case of normal power-on, the normally closed contacts in the relay are all closed, and for the voltage circuit disconnection fault preset command, the normally closed contact of the first relay in the branch circuit is opened, and the normally open contact is closed. 5. according to claim 2, the emulation station area training system with the intelligent fusion terminal as the core is characterized in that, the second fault simulation module controls the action of the relay, and the normally closed contact turns the normally open contact, simulating The open circuit caused by the melting of any phase of the fuse-type isolating switch, after the fault simulation is completed, the normally open contact turns back to the normally closed contact, simulating the normal working condition of the electrical circuit. 6. The simulation platform area training system based on the intelligent fusion terminal as the core according to claim 2, wherein, the third fault simulation module controls the action of the relay, and the normally closed contact turns the normally open contact, simulating 485 communication line is disconnected or the polarity is wrong. After the simulation is over, the normally open contact of the control relay is turned back to the normally closed contact through the fault simulation platform, and the communication returns to normal; the fault simulation platform sets the simulated residual current action protection The electrical value of each phase of the device, and the third fault simulation module simulates the residual current protection action/alarm, zero-missing protection action/alarm, overload protection action/alarm, undervoltage protection action/alarm and phase failure of the simulated residual current action protector Protection action/alarm electrical circuit failure. 7. according to claim 1, it is the emulation platform area practice training system of core with intelligent fusion terminal, it is characterized in that, the down-connected electric meter data collected by the State Grid Type I concentrator, the platform collected by the temperature and humidity sensor The area temperature and humidity data, the noise data collected by the noise sensor, and the temperature of the copper bars in the station area collected by the wireless temperature measuring device are all sent to the intelligent fusion terminal through the 485 line. 8. The simulated area training system with intelligent fusion terminal as the core according to claim 1, characterized in that, the simulated residual current action protector and the simulated low-voltage shunt monitoring unit are all installed in the outlet branch of the JP cabinet , collect the electrical data of the outgoing line branch in the station area, and send the data to the intelligent fusion terminal through the 485 line, and simulate the failure situation of the outgoing line branch in the station area. 9. The simulation area training system based on the intelligent fusion terminal according to claim 1, wherein the intelligent capacitor is installed on the outgoing line of the JP cabinet, and reactive power compensation is carried out during the power transmission process, The data is sent to the intelligent fusion terminal through the 485 line. 10. The simulation station area training system based on the intelligent fusion terminal as the core according to claim 1, characterized in that, the abnormal conditions of the electrical values of each electrical circuit in the low-voltage station area simulated by the AC power simulation module include a power outage in the station area, Incoming line or each outgoing branch circuit loses phase, loses voltage, voltage exceeds the upper limit, voltage exceeds the lower limit, heavy load, overload, three-phase voltage unbalance and three-phase current unbalance. 11. According to any one of claims 1 to 10, the simulated area training system with the intelligent fusion terminal as the core is characterized in that the simulated low-voltage shunt monitoring unit includes a display light, and the display light is always green under normal conditions. On; the fault state display light is off, the configuration state display light is flashing green, and the overcurrent fault state is steady red.

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