Chapter 3: Wiring
Firmware – S1043
Revision: 2 (9/98)
42
© Saftronics, Inc.
3.5.4
Control Circuit Wiring Precautions
•
Separate control circuit wiring (Terminals 1 to 33) from main circuit wiring (Terminals L1, L2, and L3 (R, and S,
and T), B1, B2 , T1, T2, and T3 (U, V, and W),
√
,
⊕
1,
⊕
2, and
⊕
3 and other high-power lines.
•
Separate wiring for control circuit Terminals 9, 10, 18, 19, and 20 (contact outputs) from wiring for Terminals 1 to
8, 21, 22, 23, 25, 26, 27, 33 and 11 to 17.
•
Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults. Process cable ends
as shown in
Figure 3.21
.
•
Connect the shield wire to Terminal 12(G).
•
Insulate the shield with tape to prevent contact with other signal lines and equipment.
Figure 3.21
Processing the Ends of Twisted-Pair Cables
3.6
Wiring Check
Check all of the wiring after wiring has been completed. Do not perform a megger check on control circuits.
•
Is all wiring correct?
•
Have any wire clippings, screws, or other foreign material been left?
•
Are all screws tight?
•
Are any wire ends contacting other terminals?
Connect to shield
sheath terminal at
VG5 (Terminal 12)