Generator Neutral Grounding Resistor

Model:	MRD-FD
Brand:	mingrui
Origin:	-
Category:	Electronics & Electricity / Power Supply & Distribution / Power Distribution Cabinet
Label:	Generator Resistor , Resistor , Neutral Resistor
Price:	US $5000 / set
Min. Order:	1 set

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Product Description

MRD-FD Neutral Grounding Resistor for Generator

Preface

1. Selection of Generator Neutral Grounding Mode

Generator is the driving force in power system, which must have the right ability to respond to sudden failure in operation, to which the mode of generator neutral grounding is closely related.

-solid grounding

-Neutral-point grounding via low-resistance

-Neutral-point ungrounded

-Neutral-point grounding via arc-suppression coil

-Neutral-point grounding via high resistance

Fault Current Allowable Value of the Winding.

Single-Phase Grounding of Generator Stator

Generator Nominal Voltage(kV)	Generator Nominal Capacity(MW)		Allowable Fault Current Value(A)
6.3	≤50		4
10.5	Steam turbine generators	50-100	3
	Water turbine generator	10-100
13.8~15.75	Steam turbine generators	125-200	2
	Water turbine generator	40-225
18~20	300-600		1

Brief Introduction of Product

1. Scope of Application

MRD-FD type neutral ground resistor cabinet is complete equipment specially used for generators in power plant which adopts high-resistance grounding for neutral. The voltage grade for generator mainly ranges from 6kv to 20kv. When one point of the stator grounds, the device is able to limit the grounding current at a reasonable value, and effectively restraint arc flash transient overvoltage associated with single-phase grounding.

Operation Environment

Applies to indoors.
Ambient temperature: between -40 and +40 centigrade.
The altitude shall not exceed 3000m.
Relative humidity be or lower than 95%(25 centigrade)
Power grid frequency:58-62Hz (60Hz System), 48-52Hz (50Hz System)
The air at the installation site shall be free from chemical corrosion, vapour or explosive dust.