Reversing contactor
BH 9253

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.

Features
. According to IEC/EN 60 947-1, IEC/EN 60 947-4-2
. Switching at zero-crossing
. To reverse 3 phase asynchronuos 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
. 45 mm; 67.5 mm; 112.5 mm width

Technical specifications
Approvals: UL
Enclosure design: Switch cabinet
On/Off Input Control: AC, AC/DC
Temperature monitoring: Yes
Signalling output: Yes
Widths: 45, 67,5, 112,5mm
Number of poles: 3-pole
Load voltage up to: 3AC 24 - 480V
Load current up to: 20A
Type: BH 9253


Manufacturer: E. Dold & Söhne GmbH & Co. KG
Type: BH9253.11 AC400V 12A 100MS
Art. No.: 0057946