Shanghai STEP Electric Corporation
Chapter 8 Elevator Elevator Commissioning Guide
8.2 Check before Power on
After installation of electrical control systems, electrical parts must be checked:
1. Check the connection of all parts, according to the user manual and electrical schematic
diagram.
2. Check whether the strong current part and the weak current part are connected. Check the
resistance between various voltage circuits with ohm grade of a multimeter, and the grounding
resistance should be ∞.
3. Please carefully check whether the power incoming line of the control cabinet and motor
connections are correct, to avoid burning the elevator integrated drive controller after power on.
4. Check whether the control cabinet case, motor case, car grounding wire, hall door grounding
wire are reliably and securely connected, to ensure personal safety.
▲ Note: The cabinet case and the motor case should be one point grounding.
8.3 Power on and Check
8.3.1 Confirmation before Power on
1. Check the control cabinet for earthing short circuit before power on:
(1) input power line three-phase ground
(2) Motor line three-phase ground
(3) Terminal 220V ground
(4) Communication line ground
(5) Encoder line ground
Please exclude all items above if short circuited.
2. Grounding check: (Make sure the following items are reliably grounded)
(1) Control cabinet ground
(2) Motor ground
(3) Lift car ground
(4) Door motor ground
(5) wire casing ground
(6) Encoder shield control cabinet ground
(7) Encoder shield motor terminal ground
Note: single terminal grounded for asynchronous motor encoder shield, both terminals
grounded for synchronous motor Encoder shield.
3. Check communication lines, encoder cable and power line wiring: (Please confirm whether the
site meets the following requirements, if not, please correct):
(1) Well communication line is twisted pair line and the twist distance <35mm
(2) Lift car communication line is twisted pair and the twist distance <35mm
(3) Group control communication line of parallel connection is a twisted pair line and the
twist distance<35mm (only parallel connection or group control elevator)
(4) Encoder lines and power lines go separate trunking
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