Neutral Grounding Transformer quality warranty standard:IEEE32,IEC service: 50/60Hz system resistor value:1~2000
Neutral Grounding Transformer
Scope of Application
MRD-FD type generator neutral-point resistor cabinet is complete equipment specially used by generators in power plant which adopts high-resistance grounding for neutral-point. The voltage grade for generator mainly ranges 6kv to 20kv. When the stator adopts one-point grounding, it is able to limit the grounding current to very small value, and effectively restraint electric-arc grounding transient over-voltage.
Operation Environment
1,Applies to indoors.
2,Ambient temperature: Not below -40°C, but not above +40°C.
3,The altitude shall not exceed 3000m.
4,Relative humidity:≤95%(25°C).
5,Power grid frequency: 58~62Hz(60Hz System),48~52Hz(50Hz System)
6,The air at the installation site shall be free from chemical corrosion, vapour or explosive dust.
| Main Composed Elements | |
| Resistor | made of imported stainless steel or domestic stainless steel,high conductivity and temperature coefficient,corrosion resisting, thermostability, operation safty |
| Grounding Transformer | Optional, if tansformer is angle-connected, grounding transformer should be used. |
| Counter | Optional, for recording grounding times of NGR |
| Disconnector | Optional, for convenienting maintainance |
| Heater and Humidity Controller | Optional |
| Monitor | Optional, for monitoring unbalanced current, temperature of resistor and cabinet inside, grounding fault current and grounding times when single phase grounding.And transfering the datas to main controlling room. |
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