Earth Zero | Earth Zero Flag
Earth fault indicator
The Earth Zero is an earth fault indicator. The device is used to detect, display and remotely signal earth fault currents in medium-voltage networks.
A connected summation current sensor monitors the summation current of all three conductors. The evaluation takes place in the electronics of the display device. When the response criteria are reached, a flashing red LED or LED and indicator is displayed in the indicator. The remote signaling contact is also activated.
An optional system-related external indicator light can be connected.
Product features
- Display via LED or LED and indicator
- Remote signal via relay contact
- Optional: external indicator light
Earth fault indicator via LED
Test/ reset button
Your added value
- Fast, clear detection
- Connection to telecontrol technology
- Fault detection without opening/entering the station in combination with the external indicator light
Earth fault indication via LED and indicator
Test/ reset button
Technical data
Short-circuit indicator✅
| Earth Zero | Earth Zero Flag | |
|---|---|
| Earth fault location method | Earth short circuit |
| IE> Response values earth fault current | 25, 50, 75, 100 A (other response values on request) |
| tIE> Response delay | 80, 160 ms |
| Response tolerance | ±15 % |
| Display |
|
| Remote signaling / communication | 1 relay contact + –input for external signal lamp |
| Telecommunication contact | Permanent or wiping contact (1 s) Contact rating: 230 V AC / 1 A / 62.5 VA max.; 220 V DC / 1 A / 60 W max. |
| Reset |
|
| Supply | |
| Converter power supply | ✅ |
| Internal power supply | Long-life lithium cell, service life ≥20 years, >1,200 h total flashing time (>500 h when using the external indicator lamp) |
| Housing | Polycarbonate, IP40 (built-in housing), IP65 (surface-mounted housing) |
| Temperature range | -30 °C to +70 °C |
All important documents for the device
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Other short-circuit and earth fault indicators
ComPass A 2.0
- Load current monitoring
- Detection of earth faults and short circuits for NOSPE/ KNOSPE networks
- Error display without direction indication
ComPass B
- Highly accurate monitoring
- Detection of earth faults and short circuits for all networks
- Remote signaling via RS485 / Modbus interface
ComPass B 2.0
- Highly accurate monitoring
- Detection of earth faults and short circuits for all networks
- Error direction display
ComPass Bs 2.0
- Fault direction indicator with monitoring
- Detection of earth faults and short circuits for all networks
- Switching ComPass Bs 2.0 for controlling a switch-disconnector or circuit-breaker remotely