VFD68 Variable Frequency Drives (230 or 460 VAC)
12
•
Prevent VFD-generated EMI from causing functional problems.
-
Do not run the low-voltage signal cables and the high-voltage power cables in parallel with each other,
and do not bundle them together.
-
Run low-voltage signal cables as far away as possible from high-voltage power cables.
-
Use shielded cables for the low-voltage signal cables. Connect the sensor cable shield at only one
point and that one point is the same terminal as the sensor's common wire.
-
Install a ferrite core on the signal cable (for example, ZCAT3035-1330 TDK).
Terminal Screw Torque Specifications
Tighten the terminal screw to the specified torque. Overtightening the terminal screws may damage the
terminal blocks and screw threads. Loose terminal screw connections can result in a short circuit or
malfunction.
Branch Circuit Protection
Integral solid-state short circuit protection does not provide branch circuit protection. The installer must provide
branch circuit protection in accordance with the National Electrical Code for the U.S. or the Canadian Electrical
Code for Canada and any additional codes.
As specified, UL Class T fuses or any faster acting fuse with the appropriate rating or Listed UL 489 Molded
Case Circuit Breaker (MCCB) must be employed in accordance with Table 8 on page 13 and Table 9 on
page 13.
Table 6: Torque Specifications for VFD66Bxx Drives
Rated Capacity, kW (HP)
Terminal Screw Size
1
1.
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, P1, and earthing
(grounding). The terminal screw size for earthing (grounding) appears in parenthesis if it is a different size.
Tightening Torque, N•m (lb•in.)
0.1
–
0.75 (1/8
–
1)
M3.5
1.2 (10.6)
1.5
–
3.7 (2
–
5)
M4
1.5 (13.3)
5.5
–
11 (7.5
–
15)
M5
2.5 (22.2)
15 (20)
M6 (M5)
4.4 (39)
Table 7: Torque Specifications for VFD68Cxx Drives
Rated Capacity, kW (HP)
Terminal Screw Size
1
1.
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, P1, and earthing
(grounding). The terminal screw size for earthing (grounding) appears in parenthesis if it is a different size.
Tightening Torque, N•m (lb•in.)
0.4
–
11 (1/2
–
15)
M4
1.5 (13.3)
15 (20)
M5
2.5 (22)