ABB 1MRK00008-KB Thermocouple card

The resolver cable must be shielded. The pairs S1/S3, S2/S4 and R1/R2 must be twisted. The shorter the twist, the better it is. Each pair has to be shielded separately within the total shield (see 3.5). The internal shields are to be connected to connector ST2 with ST2.6, ST2.7, ST2.8, the external shield is to be connected to the connector housing. Connection of the shields on the side of the motor is not allowed, and not to the connector housing either, as otherwise interference currents of the motor winding may be discharged through this shield, which would partly wreck the shielding effect (ground loops).

The Line Cable of the Motor 

The power supply of the motor, that means the actual motor cable, has to consist of four stranded cores (U1 ,V1 ,W1 ,PE). The shorter the twist, the better it is. In order to minimize interference emission, you have to use a shielded cable. The shield must be connected with a low inductance to POWER GND (26z,b,d). On the motor side the shield has to be connected to the motor housing via the metallic connector housing. To guarantee a reliable functioning of the protective function ground contact resistance (safety against contact of the winding with the housing), the motor housing has to be connected with POWER GND (26z,b,d)

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