Voltage Monitoring Relay E1YF400V01 0.85 – Undervoltage Monitoring for 3-Phase 400V Networks
The E1YF400V01 0.85 from TELE is a compact voltage monitoring relay from the ENYA series for reliable undervoltage monitoring in 3-phase networks with neutral conductors. The device continuously monitors each phase against the neutral conductor and protects electrical systems from the consequences of voltage drops and power outages.
The undervoltage threshold is fixed at 195.5 V (L-N) and complies with the requirements of VDE 0108. If the voltage of one of the monitored phases falls below this value, the output relay reliably switches off. A fixed hysteresis of approximately 5% prevents undesirable switching operations due to short-term voltage fluctuations.
The relay does not require a separate power supply, as the measuring and supply voltage are identical. A potential-free changeover contact with a switching capacity of up to 5 A at 250 V AC is available for signaling. A yellow LED indicates the current switching status of the output relay.
Thanks to its narrow design of only 17.5 mm, the device is ideally suited for space-saving mounting on DIN rails in control cabinets, power distribution systems, and safety power supplies.
Your advantages at a glance
- Undervoltage monitoring for 3-phase networks
- Rated voltage 3(N)~ 400/230 V AC
- Fixed switching threshold 195.5 V (L-N)
- According to VDE 0108
- 1 changeover contact (1 CO)
- Switching current up to 5 A
- Fixed tripping delay approx. 200 ms
- Supply voltage = measuring voltage
- Yellow LED output indication
- Compact width of 17.5 mm
- DIN rail mounting
Typical applications
- Safety power supplies
- Emergency lighting systems
- Power distribution systems
- Control cabinet construction
- Machine and plant engineering
- Building automation
- Voltage monitoring in three-phase networks
