Fuses
Model J: Fuses used for motor protection must be rated for
minimum 500 V. Motors up to and including 10 hp (7.5 kW) require
class K5 UL-listed fuses. Any UL-listed fuse can be used for motors
of 15 hp (11 kW).
Model K: Fuses used for motor protection must be rated for
minimum 600 V.
For fuse sizes, see the section on recommended size of
fuses.
3 × 440-480 V, MLE Model K
Motor size
[hp]
Recommended
[A]
Maximum
[A]
Fuse type
20 50 80
RK1, Class J or
T UL listed fuse
25 60 80
RK1, Class J or
T UL listed fuse
30 70 80
RK1, Class J or
T UL listed fuse
Branch-circuit protection for MLE Model J
When the pump is protected by a circuit breaker, the circuit breaker
must be rated for a minimum voltage of 500 V. The circuit breaker
must be of the inverse-time type.
Branch circuit short-circuit protection
For the USA
Integral 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.
For Canada
INTEGRAL SOLID STATE SHORT-CIRCUIT PROTECTION DOES
NOT PROVIDE BRANCH CIRCUIT PROTECTION. BRANCH
CIRCUIT PROTECTION MUST BE PROVIDED IN ACCORDANCE
WITH THE CANADIAN ELECTRICAL CODE, PART I.
Overload protection
Degree of overload protection provided internally by the drive, in
percent of full-load current: 102 %.
12
Appendix A
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