Branch Circuit Protection - PENN Controls - VFD68Bxx - VFD68Cxx - VFD68Dxx - Three‐Phase Motor Speed Controller - VFD68 Three‐Phase Variable Frequency Drive

VFD68 Variable Frequency Drives Technical Bulletin
Product name
VFD68 Three‐Phase Variable Frequency Drive
Document type
Technical Bulletin
Document revision
C
Revision date
2019-08-09
Part number
24-7664-3051

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 1 and Table 2.

Table 1. 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 15 15 15 20 30 40 60 70 80 150 175
Molded case circuit breaker (MCCB) Maximum allowable rating (A)1 15 15 15 15 20 25 40 60 80 110 150
Table 2. VFD68Cxx Electrical Ratings
460 VAC kW (HP)
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) 480 V or more
Fuse maximum allowable rating (A) (without power factor improving reactor)2 6 10 15 20 30 40 70 80 90
Molded case circuit breaker (MCCB) Maximum allowable rating (A)2 15 15 15 15 20 30 40 50 70
Table 3. VFD68Dxx Drives Electrical Ratings
575 VAC kW (HP)
0.75 (1) 1.5 (2) 2.2 (3) 3.7 (5) 5.5 (7.5) 7.5 (10)
Rated fuse voltage (V) 575 V or more
Fuse maximum allowable rating (A) (without power factor improving reactor)3 6 A 10 A 15 A 20 A 30 A 40 A
Molded case circuit breaker (MCCB) maximum allowable rating (A)1 5 A 10 A 15 A 20 A 30 A 30 A
1 Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
2 Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
3 Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.