Fanox Earth Leakage

Fanox ELR-3B – Type B Earth Leakage Relay | DC/AC up to 1000 Hz | 3 Modules

SKU FANOX-ELR3B
Fanox ELR-3B Type B earth leakage relay. Suitable for DC, pulsating, and AC up to 1000 Hz. Adjustable delay and sensitivity, fail-safe, DIN rail 3 modules.
DIN Rail IEC 62020 CE Certified
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Fanox ELR-3B – Type B Earth Leakage Relay (DC / AC / Pulsating Current)

The Fanox ELR-3B is a Type B earth leakage relay designed for modern electrical installations that include variable-speed drives (VSDs), rectifiers, UPS systems, EV chargers, and other equipment generating smooth DC, pulsating, and high-frequency AC leakage currents. It is the only relay type certified to detect all forms of leakage current up to 1000 Hz.

  • Type B rated: detects DC, pulsating DC, and AC up to 1,000 Hz leakage currents
  • Adjustable time delay and sensitivity
  • Superimmunized design — immune to external electromagnetic disturbances
  • Used with CTB toroidal transformers (external, not built-in)
  • Modular DIN rail mounting — 3 modules width
  • Sealable front cover
  • Fail-safe function (settable) — trips on relay failure

The ELR-3B is essential for installations with VFDs, frequency converters, server room PDUs, EV charging points, and any application generating non-sinusoidal leakage.