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2.5 Wiring and Precautions
2.5.1 General
1. DO NOT connect or disconnect wiring, or perform signal checks while the power supply is
turned ON.
2. Connect the power supply wiring to the Electronic bypass input terminals L1, L2 and L3 on
the main circuit disconnect device. DO NOT connect the power supply wiring to the bypass
output terminals T1, T2 and T3.
3. Connect the motor wiring to the bypass output terminals T1, T2 and T3 at the Class 20
Motor O/L or the output reactor if installed. DO NOT connect the power supply wiring to the
bypass output terminals T1, T2 and T3.
4. Never touch the output circuit directly or place the output line in contact with the package
enclosure.
5. DO NOT connect power factor correction capacitors on the output circuit.
6. Power supply wiring and motor wiring must be in separate conduits with separate ground
conductors. (Conduits shall NOT be used as ground).
7. Control wiring must be in conduit separate from both power supply and motor wiring.
8. Tighten the screws on the main circuit disconnect (if provided) and control circuit terminals.
9. Please observe National and Local codes when wiring electrical devices.
Failure to observe these precautions may result in equipment damage or improper
operation and may not be covered under warranty.
2.5.2 Input Wiring
The Electronic bypass package may be supplied with several different input device options.
These input options include protective devices as well as non–protective devices, it is the
responsibility of the installing parties to ensure that requirements for branch circuit protection
of the appropriate size and location is observed. All incoming power is connected to terminals
L1, L2, and L3. The following input options are available.
• Fused disconnect
• Circuit breaker
• Input line reactor
• Input RFI filter
Connect the main power supply and control wiring using the following recommended conduit
locations. The input phase sequence does not affect the output phase sequence of the VFD. It
will affect bypass sequence and motor rotation direction
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