ABB ACH550-02-602A-4 [41/454] Equipment connected to the motor cable

ABB ACH550-02-645A-4 [41/454] Equipment connected to the motor cable
Preparing for installation 37
ACH550-02 User’s Manual
Equipment connected to the motor cable
Installation of safety switches, contactors, connection
boxes, etc.
To minimise the emission level when safety switches,
contactors, connection boxes or similar equipment are installed
in the motor cable (i.e. between the drive and the motor):
EU: Install the equipment in a metal enclosure with 360
degrees earthing for the shields of both the incoming and
outgoing cable, or connect the shields of the cables
otherwise together.
Bypass connection
WARNING! Never connect the supply power to the drive output
terminals U2, V2 and W2. If frequent bypassing is required,
employ mechanically connected switches or contactors. Mains
(line) voltage applied to the output can result in permanent
damage to the drive.
Before opening an isolator (or a contactor)
If an output isolator or contactor is used, supply either stop
signal (parameter 2102 STOP FUNCTION is 1 = COAST) or RUN
ENABLE (see parameter 1601) signal from an auxiliary contact
of the isolator to the drive, in order to make sure that the drive
will cut the output voltage off immediately before the isolator
opens.

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