DOLD BH 9253 | Reversing contactor
The reversing contactor BH 9253 is used to reverse the direction of 3-phase asynchronuos motors by switching 2 phases. An electrical interlocking disables the control of both directions at the same time. The reversing contactor has a short on and off delay time. When reversing the phases a switchover delay is guaranteed. To protect the power semiconductors the unit incorporates temperature monitoring. When overtemperature is detected the power semiconductors swith off and an output relay as well as a red LED is activated. This state is stored. When the temperature is back to normal the semiconductors can be activated again by switching off and on the control voltage.
Technical Specifications
| Model | Product Number | Switch Delay | Switching Capacity | Protection Degree |
| DOLD Reversing Contactors | BH 9253 | On: Max. 30 msOff: Typically 25 ms
Switch-over: 100 ms |
At AC 15:NO: 3 A / AC 230 V (IEC/EN 60 947-5-1)
NC: 1 A / AC 230 V (IEC/EN 60 947-5-1) |
Housing: IP 40 (IEC/EN 60 529)
Terminals: IP 20 (IEC/EN 60 529) |
- According to IEC/EN 60 947-1, IEC/EN 60 947-4-2
- Switching at zero-crossing
- To reverse 3 phase asynchronous motors up to
5.5 kW / 400 V (7.5 HP / 460 V) - Electrical interlocking of both directions
- Temperature monitoring to protect the power semiconductors
- Measured nominal current up to 20 A
- LEDs for status indication
- Galvanic separation between control circuit and power circuit
Width x Height x Depth:
112.5 x 67.5 x 45 mm
