LT Neutral Grounding Resistors

Termination kit

Having Safety Screen for enclosures

Supporting Pedestal structures system

Have Cable gland & stand off insulators

Having Earth fault leakage Relay facility

Resistors having high potential transformers

Resistors having excellent stainless steel hardware

Having aluminum enclosure and hot dip galvanized enclosures

Suitable for both neutral grounding transformer / excitation transformer

Having non anti frost heating facility

Neutral Grounding resistance value is precise

Neutral Grounding Resistor are easier to install

Grounding Resistors require virtually no maintenance

Grounding Resistors valve remain constant throughout lifetime

Grounding Resistors temperature have shorter time constant facility

Such Grounding Resistors have longer life and having nor anti condensation heaters

Neutral Grounding Resistor require constant maintenance due to evaporation of gel and electrolyte the liquid resistors

Having various types of Enclosure facility

Can be install both in Indoor or outdoor locations

Duty rating 10 sec., 30 sec., 60 sec., & continuous etc

Having both system voltage and operating voltage system

Grounding Resistor temperature can rise over ambient temperature

Also having material for enclosure (protection class as per IS-12063)

Accessories Require such as space heater, current transformer, isolating switch on load & off load, manually or motorised

Rated Voltage : For neutral grounding / earthing resistor rated voltage means line- to neutral voltage i.e. System Voltage divided by root3 i.e. 1.732.

Rated Current : Means Initial current that will flow through resistor when it is cold. Normally Full load current value is same as Rated current.

Time Rating : It is length of time for which NGR must tolerate rated voltage.

Short Time Rating : Normally it is 10 sec. or 30 sec. or 60 sec. depending on design parameters of protection system. IS-3043 recommends 30 sec. rating.

Continuous Rating : It is normally 10 % of full load current for healthy system neutral grounding resistor to be designed for continuous rating of 5 % to 10 % of full load current (if required).

Material of Resistance Element : We offer resistor elements made from any stainless steel or FeCrAl or Cu-Ni or Ni-Cr or any other resistance material as per requirement. Normally formed stainless steel element are best and economical for NGRS.

Temperature Rise Allowed: Normally Temperature rise is restricted to 375 deg.c. above ambient temperature as per BS-587. It can be 760 deg.c. as per IEEE-32. It can be offered of any other temperature rise as per customer's requirement.

Construction: NGR include resistor assembly, plus required insulators, internal connections and hardware etc.

Cabling / Termination : Suitable arrangement and clearance is provided for termination of cable, flats or bus duct as per requirement with undrilled removable gland plate.