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中性接地电阻

中性接地电阻

项目介绍:

RARA Neutral Grounding Resistors are designed to provide added safety to industrial distribution systems by limiting ground fault current to reasonable levels. In a typical grounded three phase system, the NGR is connected directly to the earth ground. This can cause high ground fault current (typically 10,000 to 20,000 amps) and excessive damage to transformers, generators, motors, wiring, and associated equipment. Installing a RARA Neutral Grounding Resistor between neutral and ground limits fault current to safe levels while still allowing sufficient current flow to operate fault clearing relays

-custom designed for your particular system
-durable, all stainless steel resistor elements
-elements are well insulated from ground for added safety
-corrosion resistant enclosures
-several stages of assembly depending on shipping needs

 

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产品信息

Characteristics of Metal Resistive Elements

-reliable electrical characteristics
-resistor contact points are spot or argon-welded eliminating contact defects
-high resistance to mechanical vibration
-advanced cutting and trimming technology ensures low resistance tolerance
-easy maintenance and verification

Minimum Information Needed for Model Selection

-voltage rating [KV/R3]
-current rating [A]
-time rating [sec.]
-resistance [ohms]
-indoor/outdoor
-ambient environmental conditions

 

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