Product Introduction
Distribution Network Grounding Resistor Cabinets (also known as neutral point grounding resistor cabinets or low - resistance grounding complete sets) are essential safety devices in modern power systems, particularly in medium - voltage distribution networks such as 10kV and 35kV. They are primarily used to limit fault current during single - phase grounding faults, protecting system equipment and personnel. They also provide reliable fault signals to relay protection devices, ensuring that faults can be quickly and accurately cleared, significantly improving the reliability, safety, and stability of distribution network power.
Product Picture
Core Functions and Benefits
Limiting Fault Current and Protecting Equipment:
When a single - phase ground fault occurs in the distribution network, the Distribution Network Grounding Resistor Cabinet effectively limits the fault current to a preset safe range (typically 100A - 1000A), preventing excessive fault current from causing thermal and mechanical damage to transformers, cables, switchgear, and other equipment, thereby extending equipment life.
Suppressing Overvoltage and Protecting Insulation:
Effectively suppressing overvoltages caused by arc grounding or intermittent grounding (which can reach 3 - 5 times the normal phase voltage), preventing dangerous overvoltages in the system, protecting the insulation of electrical equipment, and reducing the risk of insulation breakdown.
Providing Fault Signals for Rapid Location:
Combined with a zero - sequence current transformer and grounding transformer (if used), the grounding resistor cabinet provides a clear and stable zero - sequence current signal to the relay protection system, enabling the protection device to quickly and accurately identify and disconnect the faulty line, minimizing the scope of the power outage and shortening fault location time.
Ensuring Personal and System Safety:
By limiting fault current and overvoltage, the risk of arcing, fire, or other hazards at the fault point is significantly reduced. At the same time, the operating safety margin of the entire power distribution system is improved.
Application scenarios
The Distribution Network Grounding Resistor Cabinets find application in the following scenarios:
Urban distribution networks (primarily cable lines).
Industrial and mining enterprise substations.
Flammable and explosive locations such as those in the petroleum, chemical, and natural gas industries.
Transportation hubs such as railways, subways, and airports.
Large commercial centers, hospitals, and data centers.
Booster substations for wind farms and photovoltaic power plants.
Industrial sectors such as water conservancy, metallurgy, and papermaking.
production equipment
About the factory
Service and Support
We provide comprehensive services, from design and product selection to manufacturing, factory testing, on - site installation guidance, commissioning, and technical training. All distribution network grounding resistor cabinets undergo rigorous electrical performance testing and mechanical inspection before shipment to ensure superior quality. We are committed to providing timely technical support and comprehensive after - sales service to ensure the long - term and stable operation of our customers' systems.
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