Product Introduction
The Generator Neutral Grounding Resistor Cabinet is the core equipment of the neutral - point grounding protection system for large generator sets. By connecting a precisely calculated resistor in series between the generator neutral point and the ground, it limits the fault current in the event of a single - phase grounding fault in the generator stator winding to a safe and controllable range. This critical protection device ensures generator safety, prevents severe core burnout, and ensures reliable operation of the relay protection system.
Product Picture
Triple Protection Mechanism
Current Limiting: Controls single - phase ground fault current to 5% - 20% of the generator's rated current, preventing arc damage to the stator windings.
Voltage Suppression: Limits transient overvoltage to 2.6 times the phase voltage to prevent magnetic saturation of the core.
Fault Isolation: Combined with the zero - sequence protection device, locates the fault phase within 0.5 seconds, preventing overvoltage in non - fault phases.
production equipment
Device Features
Highly Targeted, Precise Protection
The generator neutral grounding resistor cabinet is suitable for low - resistance and medium - resistance grounding systems. In the event of a single - phase grounding fault, it limits overvoltage to no more than 2.6 times the phase voltage through additional resistive current, ensuring rapid disconnection of the fault line and preventing equipment damage.
Compact Structure and Easy Installation
This cabinet integrates a Z - type grounding transformer (optional), resistors, instrument transformers, and instruments within a sealed metal cabinet. An optional disconnect switch is available. Supplied as a complete set, the cabinet offers a clear layout and facilitates commissioning and maintenance.
High - Quality Materials and Reliable Performance
Transformer: Dry - type Z - type wiring with strong insulation performance.
Resistors: Nickel - chromium/stainless steel alloy, high - temperature resistant (1600°C), stable resistance (with an extremely low temperature coefficient magnitude of ≤ 0.045%/°C), and flameproof and explosion - proof.
Overall: Corrosion - resistant and impact - resistant, with a service life exceeding 20 years.
About the factory
FAQ
Q: Can it be used in high-altitude/coastal environments?
A: Yes: It's dust-proof in high-altitude environments and salt-spray-proof at the coast, having passed extreme environment testing.
Q: Is installation difficult? Do you provide commissioning?
A: Installation is easy: It can be completed within one day, and we provide video instructions and 24-hour phone support.
Q: What information should I provide when purchasing?
A: Main requirements include: generator model, rated voltage, desired grounding current, and whether it's for indoor/outdoor use.
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