SHANGWEI SHANGWEI

中文
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Leakage current monitoring and protection device

The leakage current on-line monitoring device developed and produced by our company is suitable for 400V TN and TT systems such as power plants, coal, steel, textiles, etc. It can solve the problem of large-scale power loss caused by high-resistance grounding in MCC lines, non-operation of plastic shell switches and thermal relays, resulting in leapfrog tripping after PC. The insulation monitoring system continuously detects the leakage current of the electricity system, calculates the change of the insulation performance of the electrical system in real time, and accurately alarms when insulation faults occur, effectively reducing equipment damage, personal electric shock and electrical fire accidents due to leakage, and avoiding sudden power outages. Huge economic losses and adverse social effects are caused, and the prevention is truly preventive.

Key words:

Shangwei Electric

Classification:

Transformer series

Product Consulting:

 

+86-312-6783322

 

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  • Description

  • The leakage current on-line monitoring device developed and produced by our company is suitable for 400V TN and TT systems such as power plants, coal, steel, textiles, etc. It can solve the problem of large-scale power loss caused by high-resistance grounding in MCC lines, non-operation of plastic shell switches and thermal relays, resulting in leapfrog tripping after PC.
    The insulation monitoring system continuously detects the leakage current of the electricity system, calculates the change of the insulation performance of the electrical system in real time, and accurately alarms when insulation faults occur, effectively reducing equipment damage, personal electric shock and electrical fire accidents due to leakage, and avoiding sudden power outages. Huge economic losses and adverse social effects are caused, and the prevention is truly preventive.

    Functional Benefits
    1. Real-time monitoring: on the centralized control unit and the central monitoring host, the leakage current of the monitored line can be displayed in real time, and the change trend curve can be displayed on the monitoring computer, which is helpful for maintenance personnel to accurately judge the insulation condition of the system and help maintenance personnel to make maintenance plans.
    2. Four-level early warning function: support four-level (alarm level can be set) early warning, such as three-level setting value can be set 300, 2000, 3000(mA). When the system detects that the leakage current value exceeds the early warning fixed value, an alarm will be issued and adjusted to the lower-level fixed value after automatic delay. According to the length of the alarm interval, the development speed of leakage fault can be judged to determine when to overhaul, which plays the role of condition-based overhaul and improves the reliability and continuity of power supply. At the same time, the corresponding trip action time and trip setting value can be set according to the on-site working conditions, in order to prevent large-scale power failure caused by leapfrog trip, or the user can also choose to switch to "no trip".
    3. High sensitivity leakage detection transformer: Since the leakage current is usually mA level, the monitoring device is required to sample sensitively and accurately. The intelligent leakage transformer developed by our company adopts the automatic compensation design of "microcrystalline iron core" and "zero flux technology", so that the transformer is always in the ideal "zero flux" working state, and the sensitivity of the transformer is improved to the maximum extent. The leakage transformer adopts standardized design and has good interchangeability.

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