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GREEGOO Electric Co.,Ltd.
No.6 Floor,Jinye Mansion, Lvzhuang, Liushi, Yueqing, Zhejiang, 325604 P.R. China
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Magnetic Latching Contactors (GCR1-F)
|Magnetic latching contactors of both block and bar mounted types are fitted with a special electromagnet which enables them to remain in the "On" position when the coil is no longer energised.
The special properties of magnetic latching contactors make them suitable for a large number of applications.
■ Refineries, power stations, excitation circuits.
■ Contactors remaining in the closed state for long periods.Examples:refineries, power supplies,low voltage distribution.
■ Selective opening control.
■ No unwanted opening and closing of the main power poles.
■ Current carrying at voltages up to 1000 Volts.
■ Retention of the sequence memory in automatic control equipment in the event of loss of control voltage.
■ Energy saving, since the source of supply to the coil does not need to supply current when the contactor is latched in the
■ Change of state from "Closed" to "Open" by current signal through the coil.
■ Unaffected by mains interference.
■ Utilisation of contactors beyond their breaking capacity, as operations are performed off-load.
■ Contactors are silent in the latched position.
Operation of the electromagnet (GCR1-F block contactors)
■ GCR1-F magnetic latching contactors are fitted with a double coil with 3 terminals comprising a latching winding and an
unlatching winding. The 2 windings have a common point which can necessitate special wiring precautions when the
latching supply is separate from the unlatching supply.
■ The power supplies may be a.c. or d.c. For d.c. operation, the polarities indicated must be complied with.
■ Operating precautions:the 2 windings must not be supplied simultaneously,a winding must not be supplied
continuously,supply to the coils must be via pulsed contacts.
■ Manual opening: if the control voltage is not present, the contactor can be unlatched manually.
Selection guide for utilisation category AC-3
|Rated operational current inAC-3(q≤55℃)||Rated operational power (standard motor power ratings)||Reference|
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Add: No.6 Floor,Jinye Mansion, Lvzhuang, Liushi, Yueqing, Zhejiang, 325604 P.R. China Tel: +86-577-62776000 Mob: +86-15958776000 Fax: +86-577-62776006