ZLZB/ZDGZ series high-voltage distribution equipment comprehensive protector mining explosion-proof intelligent measurement and control unit

Description :

  The ZLZB/ZDGZ series comprehensive protector for high-voltage distribution equipment is a core intelligent control unit designed specifically for underground and surface high-voltage switchgear in coal mines. This device mainly solves the pain points of single protection function, low action accuracy, and difficult fault diagnosis in traditional high-voltage power supply systems. It is suitable for power systems with 6kV/10kV neutral points not grounded or grounded through arc suppression coils. As the "brain" of high-voltage distribution equipment, it integrates data acquisition, logical judgment, execution control, and human-computer interaction functions, which can monitor the operation status of the power grid in real time, ensure that the power supply is quickly cut off in case of short circuit, overload, leakage and other abnormalities, and ensure the stable operation of the mining power system and the safety of personnel and equipment.

  The ZLZB/ZDGZ series high-voltage distribution equipment comprehensive protector adopts high-performance microprocessors and industrial grade components, with a wide temperature working range and strong anti-interference ability. The shell is usually made of flame-retardant ABS engineering plastic or metal shielding shell, with a protection level of IP54 or above, suitable for harsh environments with high humidity and dust underground. The implementation standards comply with relevant national standards such as MT/T 1178-2019 "Comprehensive Protection Device for High Voltage Switches in Coal Mines" and GB/T 14598. Internally integrated high-precision current transformer signal input interface, supporting 0-5A or 0-1A standard signal input, with measurement error controlled within ± 1%. The communication interface comes standard with RS485 and supports Modbus RTU protocol, making it easy to access the mine automation monitoring system and achieve remote data upload and control command issuance.

  When selecting the ZLZB/ZDGZ series high-voltage distribution equipment comprehensive protector, it is necessary to clarify the voltage level (6kV or 10kV) and the matching vacuum circuit breaker model. This series of products is divided into two sub series, ZLZB and ZDGZ. The former focuses on general line protection, while the latter may be optimized for specific functions such as grounding line selection or dual circuit switching. Please refer to the manufacturer's technical manual for details. Applicable scenarios include high-voltage feeder switches and mobile substations in central substations and mining area substations underground in coal mines. Not applicable to low-voltage 380V/660V systems or ordinary civilian distribution cabinets without explosion-proof requirements. If there is strong electromagnetic interference on site, it is recommended to choose a model with a metal shielding shell and ensure good grounding to avoid misoperation or refusal to move.

  The installation of the ZLZB/ZDGZ series high-voltage distribution equipment comprehensive protector must strictly follow the wiring diagram, and special attention should be paid to the prohibition of open circuit on the secondary side of the current transformer. The voltage sampling circuit needs to be equipped with fuse protection. In daily maintenance, the display screen and buttons should be cleaned regularly to prevent coal dust accumulation from affecting operational sensitivity. It is recommended to conduct a simulated transmission test once every quarter to verify whether the action values and time of overcurrent, quick break, leakage and other protection functions meet the setting requirements. Common faults include black screen display (check power module), communication interruption (check RS485 wiring polarity), or sampling deviation (calibrate zero drift). Before resuming operation after a long-term shutdown, it is necessary to recheck the protection settings to ensure that they match the current power grid operation mode and avoid accidents caused by excessive tripping due to improper settings.

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