CKM-S22Low voltage substation leakage fault troubleshooting training device

1 Product Introduction

deviceIn the design, a simulated transformer substation radiation line structure is adopted, which is divided into a main line and eight branch lines. The training device is equipped with three-level leakage protection devices for the substation area, including leakage protection, central protection, and household protection. The device simulates common faults such as aging of substation lines, reduced insulation level of insulators, non-standard electricity use by users, and incorrect wiring of lines to simulate leakage faults. It can further restore safety hazards such as user inability to use electricity due to leakage, line tripping beyond the level, transformer shell electrification in the substation area, and reverse voltage on the distribution box shell. The device can enable students to understand and recognize the principle of leakage and master the methods of handling leakage faults.

II Functional Features

1) The device cabinet adopts a combination splicing method, and the material used is sheet metal structure, which is elegant, neat and beautiful;

2) The device design fully complies with the requirements of the power grid safety regulations and relevant technical regulations and standards;

3) The training operation part of the device is designed completely in accordance with the protection system process of the low-voltage distribution transformer area in the rural power grid. Common components used on site, such as residual current action protection relays, residual current action protection circuit breakers, and household residual current action protection devices, are used in conjunction with simulated overhead radiation line components to form an isolated system from the mains powerTTSystem;

4) The device has multiple safety protection measures. The power control part of the device adopts overload leakage type circuit breakers, and the power supply of the device is isolated from the mains power, forming a system that is isolated from the mains powerTTThe system and circuit are equipped with current type overload protection boards（6AProtection, with adjustable protection values as needed, and leakage protection modules provide real-time and effective protection for personal and equipment safety. The operation panel of the device is equipped with residual current action protection relays, residual current action protection circuit breakers, household leakage protection devices, and fuse protectors. When short circuits or other faults are caused by misoperation, they provide reliable protection;

5) The device simulates a typical low-voltage distribution transformer substation line diagram in a rural power grid, which can be divided into eight branches, including single-phase and three-phase, with a total of more than forty users, similar to the actual situation;

6) The device can set leakage faults in the main line, branch lines, and user indoor lines, and each branch can have an independent fault point. The entire platform area is designed with150Multiple fault points;

7) The device is equipped with intelligent leakage circuit breakers from mainstream domestic brands, which have functions such as leakage protection, undervoltage, phase loss and overload protection. The leakage current can be adjusted and has communication function;

8) The first and second level residual current protection devices have communication control functions, which can be set through computer software or local operation to verify, observe and learn the design and installation requirements of the first and second level residual current protection devices, including residual current action protection values, action times and other parameters;

9) It is possible to set up wiring error faults for three-level residual current devices, simulate typical faults such as residual current protectors not being activated or not being disconnected, etc;

10) It can test students' ability to recognize diagrams and their ability to search for and handle faults, as well as their ability to correctly use tools and commonly used meters;

11) The device can simulate low voltage, phase loss, overvoltage, and heavy overload faults in the low-voltage distribution station area;

12) The device panel reserves a phase adjustment position for the circuit, which can adjust the power supply circuit as needed and achieve three-phase imbalance simulation and load leveling;

13) The device is capable of outputting leakage current0-1000mA, accuracy1mA；

14) The device can simulate the unreliable grounding fault of the neutral point grounding resistance of the transformer in the low-voltage distribution station area, and the adjustment range of the grounding resistance is0-1000Ω, accuracy1Ω；

15) The device is capable of simulatingTTThe leakage of electric motor casing in the user's home leads to reverse voltage on the transformer casing;

16) The device is equipped with a comprehensive display screen, which has functions such as timer, voice broadcast, and alarm information display;

17) The position for installing residual current circuit breakers on the device panel is equipped with mesh plates, which are compatible with installing various types of residual current circuit breakers. Other types of residual current circuit breakers can be installed and debugged on the device.