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EARTH ZERO

The EARTH ZERO device is an earth fault indicator. It is designed to detect, locally indicate and remotely report earth fault currents in medium voltage distribution networks.

Earth Fault Indicator

Product Features

  • Indication of earth fault currents by LED and mechanical flag
  • Remote indication via relay contacts
  • Optional: external signal lamp

The EARTH ZERO device is an earth fault indicator. It is designed to detect, locally indicate and remotely report earth fault currents in medium voltage distribution networks. A wired earth fault current transformer monitors the summation current of all three conductors. The electronics of the display unit evaluates the measurements. When the fault sensitivity threshold is exceeded, a red LED will start flashing and a mechanical flag become visible. In addition to that, the remote indication contacts are energized A system-related external signal lamp (optionally available) is also activated.


Product

Note Item Number

EARTH Zero, plug-in housing

Item Number32-0513-001

EARTH Zero, surface mount housing

Item Number32-0503-001


Technical Data

Technical Data

EARTH ZERO

Earth fault indicator

  •  

IE> Earth fault trip current

25, 50, 75 or 100 A

tIE> Response delay

80 or 160 ms

Accuracy

±15 %

Indication

1 red LED, flash rate: 2 s

Reset

  • Manual reset

  • Automatic time reset:: 2, 4, 8 h

  • Voltage restoration (110 – 240 V AC)

Remote signal

1 relay contact

Relay contact

Potential-free permanent or momentary contact (1 s), adjustable
Contact capacity:
230 V AC/1 A/62.5 VA max.
220 V DC/1 A/60 W max

Power supply

Long-life lithium cell, lifetime ≥20 years,
total flashing time >1,200 h (>500 h when using the external signal lamp)

Housing

Polycarbonate, IP40 (plug-in housing), IP65 (surface mount housing)

Temperature range

-30 to +70 °C

 

Accessories

Current transformers

Earth fault current transformers

  • For earth fault indicator types EARTH 4.0, EARTH ZERO
  • For conductor Ø approximal 130 mm
  • 3 m connection cable

more...
49-6013-029

External Signal Lamps

External Signal Lamp

  • with 3 LEDs (red)
  • 10 m connection cable, for continuous contact, with battery

more...
49-0702-010
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