Grundfos CRE Serie Informations Importantes page 30

3 × 440-480 V, MLE Model K
Motor size
[hp]
15
20
25
30
3 x 200-240 V, MLE Model K
Motor size
[hp]
10
15
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 %.
30
Recommended
[A]
35
50
60
70
Recommended
[A]
70
80
Maximum
[A]
RK1, Class J or T UL listed
60
RK1, Class J or T UL listed
80
RK1, Class J or T UL listed
80
RK1, Class J or T UL listed
80
Maximum
[A]
RK1, Class J or T UL
80
RK1, Class J or T UL
80
Fuse type
fuse
fuse
fuse
fuse
Fuse type
listed fuse
listed fuse