12.2.3
UL: Short Circuit Current Rating
The integrated variable speed drives are suitable to be used on a circuit capable of delivering no more
than 100 kA RMS symmetrical. Details can be found in the following table.
The fusing for the short-circuit protection must comply with the requirements in UL248.
Tests were made with RK fuses without semiconductor protection:
Protection rat-
ing
Maximum AC
Voltage
Rating of Fuse
used motor type
RK1
277 V
20 A / 600 V
(e.g Ferraz Shawmut / TRS20R)
MK116- #I#.##.#C
RK1
130 V
10 A / 250 V
(e.g Ferraz Shawmut / TRS10R)
MK116- #I#.##.#I
RK5
240 V
25 A / 250 V
(e.g. Ferraz Shawmut / TR25R)
MK116- #I#.##.#B
MK116- #I#.##.#G
MK152- #I#.##.#E
RK5
240 V
50 A / 250 V
(e.g. Ferraz Shawmut / TR50R)
MK152- #I#.##.#B
RK5
480 V
15 A / 600 V
(e.g. Ferraz Shawmut / TR15R)
MK116- #I#.##.#A
MK116- #I#.##.#F
MK116- #I#.##.#H
MK152- #I#.##.#D
RK5
480 V
30 A / 600 V
(e.g. Ferraz Shawmut / TR30R)
MK152- #I#.##.#A
MK152- #I#.##.#H
RK5
480 V
25 A / 600 V
(e.g. Ferraz Shawmut / TR30R)
MK152- #I#.##.#F
MK152- #I#.##.#G
Integrated solid state short circuit protection does not provide branch circuit protection.
Branch circuit protection must be provided in accordance with the National Electrical Code and any additional
local codes, or the equivalent.
Assembly instructions
ECblue BASIC-MODBUS, ECblue BASIC
Enclosure
L-BAL-F079D-GB 2044 Index 002
Part.-No.
72/80
