Maintenance To Bypass; Vfd To Bypass; Bypass To Vfd - ABB ACS580MV Hardware Manual

Maintenance to Bypass

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Check all the enclosures of bypass unit are properly closed and ready for operation
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Unlock the mode selection switch
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Set the mode selection switch to "Local position" or "Remote position"
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Lock the mode selection switch
•
Close KM3
•
Close QF1.

VFD to Bypass

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Open QF1
Hint: In case need to switch between"Local position" and "Remote position", please
apply step 2 to step 4, otherwise skip to step 5.
•
Unlock the mode selection switch
•
Set the mode selection switch to "Local position" or "Remote position"
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Lock the mode selection switch
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Open KM2
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Open KM1
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Wait for at least 3 x rotor time constant (if not available, wait for longer than 5s)
•
Close KM3
•
Close QF1.

Bypass to VFD

•
Open QF1
Hint: In case need to switch between "Local position" and "Remote position", please
apply step 2 to step 4, otherwise skip to step 5.
•
Unlock the mode selection switch
•
Set the mode selection switch to "Local position" or "Remote position"
•
Lock the mode selection switch
•
Open KM3
•
Close KM1
•
Close KM2
•
Close QF1.
Operation principle and hardware description 27