ABB | VBX01TA Invertible contactors
Reversible contactors are machines for controlling large electric motors consisting of two standard contactors and a mechanical interlock with forward and reverse mechanical reversible AC contactors. Concentrates the advantages of AC contactors and reversing switches. Simple, safe and cost effective operation, mainly for forward and reverse braking, constant operation and ignition operation of electric motors.
When the coil is energised, the static iron core generates electromagnetic suction and produces iron core suction. The contact system is associated with the iron core, which moves three moving contacts at the same time, the main contact is closed, the main contact is disconnected from the auxiliary normally closed contact associated with the machine, the auxiliary normally open contact is closed and the machine is switched on. When the coil is disconnected, the suction force disappears, the moving core linked part is separated by the reaction force of the spring, the main contact is disconnected, the auxiliary normally closed contact connected to the main contact machine is closed, the auxiliary normally open contact is disconnected and the power is disconnected.
As control elements to be summarised, relays have an extended control range, amplification, integrated signals and automatic, remote control and monitoring. For example, multi-contact relays can be used to switch on and off multiple circuits at the same time by means of different contact groups when the control signal reaches a certain value. Amplification is like sensitive relays, intermediate relays, etc., where a very small control quantity can control a very powerful circuit. Combined signals are used when multiple control signals are fed into a multi-winding relay in a defined form and are compared and combined to achieve a predetermined control effect. As for automatic, remote control and monitoring it is for example the relays on automatic devices together with other electrical appliances that can form a programmed control line, thus realising automated operation.
If you take the relay output module and the digital output module to compare, then the difference is that the relay contact capacity, high allowable voltage, generally no common end, so you can directly drive small and medium power loads, such as AC contactors, solenoid valves, etc., but the action speed is low; digital output generally can not directly drive large-capacity loads, slightly larger capacity can only drive miniature relays, but the speed is generally used for signal output, by extending the drive, can also be used to drive large-capacity equipment.
PPD512 A10-454000
PM891K01 3BSE053241R1
PM866AK02
PFTL201C 10KN 3BSE007913R10
5SHY4045L0004
5SHY4045L0006
PPD103-B03-10-150000
5SHY3545L0010/3BHB013088R0001
5SHX2645L0002
5SHX2645L0004
DSDP140B 57160001-ACX
KUC755AE106
3HAC029818-001/10 DSQC663
KUC755AE117
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