Mounting The Asd; Connecting The Asd; System Grounding - Toshiba Q7 Installation And Operation Manual

Mounting the ASD

The ambient operating temperature rating for the Q7 is from 14 to 104° F (-10 to 40° C). The process of
Caution!
converting AC to DC, and then back to AC produces heat. During normal ASD operation, up to 5% of
the input energy to the ASD may be dissipated as heat.
The stand-alone ASDs that are housed in the plastic enclosure should be installed securely using the
four mounting holes on the rear of the ASD in a well ventilated area that is out of direct sunlight.
When installing multiple stand-alone ASDs, ensure that there is a clearance space of at least 8 inches
(20 cm) from the top and the bottom of adjacent units. There should be at least 2 inches (5 cm) on either
side of adjacent units. For the models below 50 HP the top and bottom clearance specifications may be
reduced to 4 inches (10 cm). This space ensures that adequate ventilation is provided (see the section
titled
mounting space requirements).
Note:
Do Not operate the ASD with the enclosure door open.
ASDs produce high-frequency noise — steps must be taken during installation to avoid the negative
effects of noise. Listed below are some examples of measures that will help to combat noise problems.
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Connecting the ASD

Refer to the section titled
DANGER!
Specifications on pg. 13

System Grounding

Proper grounding helps to prevent electrical shock and to reduce electrical noise. The ASD is designed
to be grounded in accordance with Article 250 of the 2002 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.
Note:
The input, output, and control lines of the system shall be run in separate metal conduits and each shall
have its own ground conductor.
8
Enclosure Dimensions and Conduit Plate Information on pg. 48
Ensure that the ventilation openings are not obstructed.
Separate the input and output power conductors of the main circuit. Do not install the input and
output wires in the same duct or in parallel with each other, and do not bind them together.
Do not install the input or output power conductors of the main circuit 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.
Installation Precautions on pg. 2
before attempting to connect the ASD and the motor to electrical power.
The metal of conduit is not an acceptable ground.
for additional information on
and the section titled Lead Length
Q7 ASD Installation and Operation Manual