VFD68 Variable Frequency Drives
19
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 15 and Table 16.
Table 12: 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 13: 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)
Table 14: Torque Specifications for VFD68Dxx 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 a screw for
earthing (grounding).
Tightening Torque, N•m
0.75
–
7.5 (1
–
10)
M4
1
Table 15: VFD68Bxx Drives Electrical Ratings
230 VAC
kW (HP)
0.1
(1/8)
0.2
(1/4)
0.4
(1/2)
0.75
(1)
1.5
(2)
2.2
(3)
3.7
(5)
5.5
(7.5)
7.5
(10)
11
(15)
15
(20)
Rated fuse voltage (V)
240 V or more
Fuse maximum
allowable rating (A)
(without power factor
improving reactor)
1
1.
Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
15
15
15
20
30
40
60
70
80
150
175
Molded case circuit
breaker (MCCB)
Maximum allowable
rating (A)
15
15
15
15
20
25
40
60
80
110
150
