Ac Hoist Motor, Brake, And Velocity Encoder; Checking The Hoist Motor; Wiring The Hoist Motor To The Controller - MCi iControl User Manual

AC Hoist Motor, Brake, and Velocity Encoder

This section contains instructions for:
• Checking the hoist motor for insulation breakdown or short to ground

• Wiring the hoist motor to the controller

• Verifying iField module or low-current
• Installing the

Checking the Hoist Motor

If this job reuses existing rotating equipment, the equipment must be checked for insulation
breakdown before proceeding.
1. Disconnect all motor and brake wiring.
2. Perform an insulation test between these wires and the frame of the related equipment
using a Megohm meter to subject the insulation to the same high voltages that would be
present during elevator operation.
3. A minimum insulation resistance of 100k Ohms is required.
4. Correct any insulation problems before proceeding with installation. Insulation prob-
lems may indicate a serious problem in the equipment.
Wiring the Hoist Motor to the Controller
Incoming power to the controller and outgoing power wires to the motor must be in their
respective grounded conduit.
It is very important that AC motor wires be kept separate from control wires both inside and
outside the controller cabinet. The encoder or tachometer wiring must use a separate grounded
conduit. Use a shielded power cable between the motor drive and the AC Motor stator connec-
tions to reduce RFI/EMI noise (Siemens Protoflex - EMV or equivalent). The shield must be
terminated to earth ground at both ends. Keep the AC power wiring separate from the control
wires.
1. Refer to drawing -D1 in the job prints. This drawing shows the AC drive and connections
to rotating equipment.
2. Make connections as shown in the job prints. Be certain to follow any schematic notes
regarding wire sizes and any specific motor wiring connections.
AC Hoist Motor, Brake, and Velocity Encoder
velocity encoder
brake resistance and wiring the brake
2
2-21