neutral ground resistor for generator-XSJ

Model:	MRD-FD
Brand:	mingrui
Origin:	Made In China
Category:	Electronics & Electricity / Other Electrical & Electronic
Label:	generator neutral p , Neutral Grounding Re , Resistor
Price:	¥98000 / pc
Min. Order:	1 pc

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Product Description

1、Preface

1.1 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.

①solid grounding

②Neutral-point grounding via low-resistance

③Neutral-point ungrounded

④Neutral-point grounding via arc-suppression coil

⑤Neutral-point grounding via high resistance

Allowable Current Value Associated with Single-Phase Ground

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

1.2 Model of Generator Grounding via High Resistance

The generator neutral point grounding via high resistance is able to effectively restrain fault current, thereby effectively preventing the stator wound from breaking down, and lowering transient over-voltage due to arc flash ground.