GE Industrial Solutions ASTAT BP - Manual (Page 72)

ASTAT BP User Manual
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8.7.5 ASTAT-BP Connected Inside Delta - Reverse Speed
IMPORTANT! If speed reversing is required, L1, L2 and L3 on the input of the ASTAT-BP can not be switched!
This is because Phase Sequence Disabled can not be implemented when ASTAT-BP is connected Inside
Delta. Thus, in order to reverse motor rotation two motor windings need to be switched as shown in the
following diagram:
(Winding V1-V2 is switched with winding U1-U2):
Reverse speed with ASTAT-BP connection Inside Delta with bypass contactor
to the ASTAT-BP and Inside Delta contactor.
C1 is an Inside Delta contactor.
U1-U2, V1-V2, W1-W2 are motor windings.
1L1-2T1, 3L2-4T2, 5L3-6T3 are ASTAT-BP controlled phases.