THERMAL RELAY
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THERMAL RELAY
HRD series thermal relay is suitable for using in the circuit rated voltage up to 660V, rated current 93A AC 50/ 60Hz, for over-current protection of AC motor.
The relay has the differential mechanism and temperature compensation and can plug in HLD series AC contactor.
The product conforms to IEC60947-4-1 stardand.
Motion Characteristic: Three-phase Balance Motion Time
| No. | Times of the setting current | Motion time | Start condition | Ambient temperature | ||
| 1 | 1.05 | >2h | Cold state | 20±5oC | ||
| 2 | 1.2 | <2h | Heat state(Following the No.1 test) | |||
| 3 | 1.5 | <4min | ||||
| 4 | 7.2 | 10A | 2s< Tp≤10s | ≤63A | Cold state | |
| 10 | 4s< Tp≤10s | >63A | ||||
Phase-losing Motion Characteristic
| No. | Times of the setting current | Motion time | Start condition | Ambient temperature | ||
| Any two phases | Another phase | |||||
| 1 | 1 | 0.9 | >2h | Cold state | 20±5oC | |
| 2 | 1.15 | 0 | <2h | Heat state(Following the No.1 test) | ||