- If the voltage of the main or the control power is under voltage, UVT which is installed inside of the breaker breaks the circuit automatically. Please connect with UVT time-delay device in order to present the timedelay function because UVT is technically instantaneous type.
- The closing of a circuit breaker is impossible mechanically or electrically if control power not supplied to UVT. To close the circuit breaker, 65–85% of rated voltage should be applied to both terminals of UVT coil (D1, D2).
- When using UVT coil, the double trip coil can not be used, and the location of trip coil is changed.
1. Rated voltage and characteristics of UVT coil
| Rated voltage[Vn] | Operating voltage range[V] | Power consumotion[VA or W] | Trip time[ms] | |||
|---|---|---|---|---|---|---|
| DC[V] | AC[V] | Pick up | Drop out | Inrush | Steady-state | |
| 24–30 | — | 0.65–0.85 Vn | 0.4–0.6 Vn | 200 | 5 | Less than 50ms |
| 48–60 | 48 | |||||
| 100–130 | 100–130 | |||||
| 200–250 | 200–250 | |||||
| — | 380–480 | |||||
- Note) Operating voltage range is the min. rated voltage standard for each rated voltage (Vn).
2. Specification of the wire
- Refer to the below table regarding the length and specification of wire when using trip coil with DC 24–30 [V] or DC/AC 48–60 [V] of rated voltage.
The maximum wire length
| Rated voltage [Vn] | |||||
|---|---|---|---|---|---|
| DC 24–30 [V] | DC/AC 48 [V] | ||||
| Wire type | #14 AWG(2.08mm2) | #16 AWG(1.31mm2) | #14 AWG(2.08mm2) | #16 AWG(1.31mm2) | |
| Operating voltage |
100% | 48.5m | 30.5m | 233.2m | 143.9m |
| 85% | 13.4m | 8.8m | 62.5m | 39.3m | |
- Note) In case of using UVT coil, the location of TC coil is changed.