NEUTRAL EARTHING RESISTORS (NERs)

Neutral Earthing Resistors (also known as neutral grounding resistors in US influenced regions) are a key component in earth fault protection of medium voltage electricity generation and distribution systems.
Cressall NERs limit the current that would flow through the neutral point of a transformer or generator in the event of an earth fault.

Features of Cressall earthing resistors include:

  • Any current or voltage rating
  • Compliance with either IEC 60076-25:2023 “Power Transformers , Neutral Grounding Resistors”  or IEEE-C57-32a (2020) “Standard for Requirements, Terminology, and Test Procedures for Neutral Grounding Devices” (formerly IEEE-32).
  • Stainless steel resistors and enclosures as standard, IP23 to IP56.
  • Type-tested standard designs (certificates available)

Options include:

  • Supply of resistor banks only for incorporation into customer’s own enclosures
  • Shock-tested marine designs
  • Provision for CTs, heaters, special cabling, etc.
  • Interlocked off-load by-pass isolators
  • Single or multiple vacuum contactors
  • High resistance grounding resistors (for use where regulations permit, e.g. some offshore installations)

DISCOVER THE FULL RANGE OF CRESSALL NEUTRAL EARTHING RESISTORS

neutral earthing modular resistors

  1. NER STANDARDS
  2. NER ELEMENTS & ENCLOSURES
  3. GENERATOR EARTHING
  4. PACKAGED EARTHING TRANSFORMERS & RESISTORS

CONTACT CRESSALL NOW FOR MORE INFORMATION ABOUT OUR NEUTRAL EARTHING RESISTORS

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