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3.2.2.3 Recommended Control and Signal Wire Sizes
The recommended wire sizes to connect I/O signals to the terminal strip on the
Regulator board are shown in table 3.9. Recommended terminal tightening torque is
0.5 Newton-meters (4.5 in-lb). Operator controls can be up to 303 meters (1000 feet)
from the drive.
3.2.2.4 Recommended Motor Lead Lengths
To reduce line disturbances and noise, motor lead length should not exceed 76 meters
(250 feet) for any non-Reliance Electric motor or any non-inverter duty motor.
When total lead length exceeds 76 meters (250 feet), nuisance trips can occur caused
by capacitive current flow to ground. Note that these capacitively-coupled currents
should be taken into consideration when working in areas where drives are running. If
the motor lead length must exceed these limits, the addition of output line reactors or
other steps must be taken to correct the problem. Refer to table 3.11 for a list of
compatible reactors.
For Reliance Electric inverter duty motors, use the recommended lead lengths shown
in table 3.10 as a guideline.
Your application may be restricted to a shorter lead length due to:
•
•
•
•
Figure 3.3 illustrates how to calculate motor lead lengths.
GV3000/SE
Drive
38 m (125')
Motor
Motor
This example shows how to measure various motor configurations when the maximum motor lead length is 76 m (250 ft). Note that drives using
vector regulation can be connected to only one motor at a time.
Planning Before Installing
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Table 3.9 – Recommended Terminal Strip Wire Sizes
Terminals
1 to 31
the type of wire
the placement of wire (for example, in conduit or a cable tray)
the type of line reactor
the type of motor.
GV3000/SE
Drive
15 m (50')
38 m (125')
Motor
61 m (200')
Motor
Figure 3.3 – How to Calculate Motor Lead Lengths
20 to 14 AWG, 2 to 0.5 mm
GV3000/SE
Drive
61 m (200')
8 m (25')
8 m (25')
Motor
Motor
Wire Size
2
GV3000/SE
Drive
76 m (250')
Motor
3-7
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