
Q7 ASD Installation and Operation Manual
17
Power Connections
L1/R, L2/S, and L3/T are the 3-phase input supply terminals for the ASD. The ASD may be operated
from a single-phase supply. When operating using a single-phase supply, use the L1 and L3 terminals.
T1/U, T2/V, and T3/W are the output terminals of the ASD that connect to the motor.
An inductor may be connected across terminals PA and PO to provide additional filtering. When not
used, a jumper is connected across these terminals (see
).
Connect the input and output power lines of the ASD as shown in
.
Note:
In the event that the motor rotates in the wrong direction when powered up, reverse
any two of the three ASD output power leads connected to the motor.
Figure 4. ASD/Motor connection diagram.
Connect the 3-phase input power to the input terminals of the ASD at L1/R, L2/S, and L3/T. Connect
the output of the ASD to the motor from terminals T1/U, T2/V, and T3/W. The input and output
conductors and terminal lugs used shall be in accordance with the specifications listed in the section
titled
Cable/Terminal Specifications on pg. 159
Install a molded case circuit breaker (MCCB) or fuse between the 3-phase power source and the ASD in
accordance with the fault current setting of the ASD and 2005 NEC Article 430.
For 600 volt ASDs, the 15 HP or less ASDs (P/N VT130Q7U6015 – 6160) require a class-J fuse rated at
600 Volts/30 A.
On some Q7 devices 12-Pulse operation is available. A phase-shifting transformer must be supplied by
the user when configured for 12-pulse operation.
External fuses may required on the ASDs that are configured for 12-pulse operation.
Use either the Ferraz Shawmut Semiconductor fuse (P/N A70QS200) and fuse block P234C, or the
Toshiba ASD-FUSEKIT-12P. The Toshiba kit includes the required fuses and the mounting hardware
for the fuses.
DANGER
CAUTION