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Power Connection Requirements
Connect the 3-phase input power to the input
terminals of the ASD at R/L1, S/L2, and T/L3.
Connect the output of the ASD to the motor from
the ASD terminals U/T1, V/T2, and W/T3. The input
and output conductors and terminal lugs used shall
be in accordance with the requirements listed in the
section titled
Voltage/Current Specifications on pg.
280.
If multiple conductors are used in parallel for the
input or output power and it is necessary to use
separate conduits, each parallel set shall have its
own conduit and not share its conduit with other
parallel sets (i.e., place U1, V1, and W1 in one
conduit and U2, V2, and W2 in another — refer to
NEC Article 300.20 and Article 310.4). National and
local electrical codes should be referenced if three
or more power conductors are run in the same
conduit (refer to NEC Article 310 adjustment
factors).
Note:
National and local codes should be
referenced when running more than
three conductors in the same conduit.
Figure 3. Q9 Plus
ASD/Motor Typical
Connection
Diagram.
System Grounding
Proper grounding helps to prevent electrical shock
and to reduce electrical noise. The Q9 Plus ASD is
designed to be grounded in accordance with Article
250 of the NEC or Section 10/Part One of the
Canadian Electrical Code (CEC).
The grounding conductor shall be sized in
accordance with Article 250-122 of the NEC or Part
One-Table 6 of the CEC.
— The Metal Of Conduit Is Not An
Acceptable Ground —
The input, output, and control lines of the system
shall be run in separate metal conduits and each
shall have its own ground conductor.
ASDs produce high-frequency noise — steps must
be taken during installation to avoid the negative
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Installation and Connections
Q9 Plus ASD Install/Op Manual
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 NEC Article 430.
The ASD is designed and tested to comply with UL
Standard 508C. Modifications to the ASD system or
failure to comply with the short circuit protection
requirements outlined in this manual may disqualify
the UL rating. See
Table on page 284
specific short circuit protection recommendations.
As a minimum, the installation of the ASD shall
conform to NEC Article 110, the Occupational
Safety and Health Administration requirements, and
to any other local and regional industry codes and
standards.
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.
effects of noise. Listed below are some examples of
measures that will help to combat noise problems.
• DO NOT install the input power and output power
wires in the same duct or in parallel with each
other, and do not bind them together.
• DO NOT install the input/output power wires and
the wires of the control circuit in the same duct or
in parallel with each other, and DO NOT bind
them together.
• Use shielded wires or twisted wires for the control
circuits.
• Ensure that the grounding terminals (G/E) of the
ASD are securely connected to ground.
• Connect a surge suppressor to every
electromagnetic contactor and every relay
installed near the ASD.
• Install noise filters as required.
for typeform-
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