ABB ACQ580-34, Руководство по оборудованию

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5. Ground the shields of the control cables at the clamp plate. The shields should be
continuous as close to the terminals of the control unit as possible. Only remove the
outer jacket of the cable at the cable clamp so that the clamp presses on the bare shield.
The shield (especially in case of multiple shields) can also be terminated with a lug and
fastened with a screw at the clamp plate. Leave the other end of the shield unconnected
or ground it indirectly via a few nanofarads high-frequency capacitor, eg, 3.3 nF / 630 V.
The shield can also be grounded directly at both ends if they are in the same ground
line with no significant voltage drop between the end points. Tighten the screws to secure
the connection.
6. Connect the conductors to the appropriate detachable terminals of the control unit, see
chapter Control unit (page 111) . Use shrink tubing or insulating tape to contain any stray
strands. Tighten the screws to secure the connection.
Note: Keep any signal wire pairs twisted as close to the terminals as possible. Twisting
the wire with its return wire reduces disturbances caused by inductive coupling.
7. Install the middle front cover back.
￭
Connecting external power supply wires to the control units
The external power supply is used to keep the drive control unit (CCU) and line-side converter
control unit (ZCU) powered when the main power is off.
When external power supply is used, both control units should be connected to the external
supply.
1. To connect CCU to external power: Connect external power supply cables to terminals
40 and 41 on the CCU control unit.
2. To connect ZCU to external power: Connect the provided wire harness from the “ISU
ZCU XPOW” plug connector to CCU terminals 40 and 41, or directly to an external power
supply.
RED wire = (+) and BLACK wire = (-)
Electrical installation 105
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