Appendix
37
1.4 Electrical connection
1.4.1 Conductors
, page 11.
1.4.2 Torques
Maximum tightening torques for the terminals can be found in
section
, page 65.
1.4.3 Line reactors
The maximum line reactor sizes are listed below.
Short circuit current
If a short circuit occurs, the pump can be used on a mains supply
delivering not more than 5000 RMS symmetrical amperes, 600 V
maximum.
Fuses
Fuses used for motor protection must be rated for minimum
500 V.
Motors up to and including 10 Hp require class K5 UL-listed
fuses.
Any UL-listed fuse can be used for motors of 15 Hp.
Branch circuit protection
When the pump is protected by a circuit breaker, this must be
rated for a maximum voltage of 480 V. The circuit breaker must
be of the "inverse time" type.
Overload protection
Degree of overload protection provided internally by the drive, in
percent of full-load current: 102 %.
1.5 Outdoor installation
According to UL 778/C22.2 No 108-14 pumps that are intended
for outdoor use shall be marked enclosure type 3 and the product
shall be tested with rated surface temperature down to -31 °F
(-35 °C). The MLE enclosure is approved for type 3 or 4 and rated
surface temperature down to 32 °F (0 °C), thus only for indoor
use in UL 778/C22.2 No 108-14 pump applications. For ambient
temperature during operation, see section 10.1.2 Ambient
temperature.
Motor
[Hp]
Maximum line reactor size
[mH]
.50
1.5
.75
1.5
1
1.5
1.5
1.5
2
1.5
3
2
5
0.7
7.5
0.3
10
0.6
15
0.3
