MBC1-F Magnetic latching Contactor
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 energized.
Applications
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.
Properties
- 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 closed state.
- 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.
Technical Data
| Type | MBC1-F115 | MBC1-F150 | MBC1-F185 | MBC1-F225 | MBC1-F265 | MBC1-F330 | |
| Rated working current (A) | AC-3 | 115 | 150 | 185 | 225 | 265 | 330 |
| AC-1 | 200 | 250 | 275 | 315 | 350 | 400 | |
| Standard power ratings of 3-phase motors AC-3 (KW) | 220/230V | 30 | 40 | 55 | 63 | 75 | 100 |
| 380/400V | 55 | 75 | 90 | 110 | 132 | 160 | |
| 415V | 59 | 80 | 100 | 110 | 140 | 180 | |
| 440V | 59 | 80 | 400 | 110 | 140 | 200 | |
| 500V | 75 | 90 | 110 | 129 | 160 | 200 | |
| 660/690V | 80 | 100 | 110 | 129 | 160 | 200 | |
| 1000V | 65 | 65 | 100 | 100 | 147 | 160 | |
| Type | MBC1-F400 | MBC1-F500 | MBC1-F630 | MBC1-F780 | MBC1-F800 | |
| Rated working current (A) | AC-3 | 400 | 500 | 630 | 780 | 800 |
| AC-1 | 500 | 700 | 1000 | 1500 | 1500 | |
| Standard power ratings of 3-phase motors AC-3 (KW) | 220/230V | 110 | 147 | 200 | 220 | 220 |
| 380/400V | 200 | 250 | 335 | 400 | 400 | |
| 415V | 200 | 280 | 375 | 125 | 420 | |
| 440 | 250 | 295 | 400 | 425 | 420 | |
| 500V | 257 | 355 | 400 | 450 | 430 | |
| 660/690V | 280 | 335 | 450 | 475 | 470 | |
| 1000V | 185 | 335 | 450 | 450 | 450 | |
