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MSD Manual
Connection Diagram
Figure 6 shows the typical wiring connections between the MotorShield
Refer to the instructions for the VFD or other equipment to which the fault contact is connected.
To prevent damage due to abnormal over temperature conditions, the use of an optional thermal
interlock circuit with thermal switch is recommended to shut down the drive if internal reactor
temperatures exceed its temperature rating.
Grounding
The MotorShield
premises wiring system. The equipment grounding connection must conform to the requirements
of the National Electrical Code (NEC) and/or any other codes that apply to the installation site.
The ground connection must be made using a wire conductor. Metallic conduit is not a suitable
grounding conductor. The integrity of all ground connections should be periodically checked.
Power Wiring
Connect the output of the VFD, terminals T1(U), T2(V), & T3(W), to the input of the MotorShield
terminals U, V, & W. Connect the motor to the output of the MotorShield
Use wire that is appropriate for the voltage and current rating of the motor.
Caution
Use copper wire with an insulation temperature rating of 90°C or higher.
The wire size and the voltage ratings must conform to the requirements of the National
Electrical Code (NEC) and/or other applicable electrical codes.
Be sure to also follow the motor wiring instructions provided in the instruction manual for the
VFD.
Figure 6 – Typical Connection Diagram
panel equipment grounding lug must be connected to the ground of the
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16
4.0 Installation Guidelines
and the VFD and motor.
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, terminals T1, T2, & T3.
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,
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