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1.4 Electrical connection
1.4.1 Conductors
Use 140/167 °F (60/75 °C) copper conductors only.
1.4.2 Torques
Maximum tightening torques for the terminals can be found in
section Torques, page 32.
1.4.3 Line reactors
Maximum line reactor size must not exceed 1.5 mH.
1.4.4 Fuse size/circuit breaker
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.
Motor size
Fuse size
Circuit breaker type/model
[HP (kW)]
0.5 to 3.0
25 A
25 A / inverse time
(0.25 to 2.2 kW)
Fuses
When the motor is protected by fuses, they must be rated for
480 V. Maximum sizes are stated in the table above.
Motors up to and including 3.00 HP (2.20 kW) require class K5
UR fuses.
Circuit breaker
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.
The interrupting rating (RMS symmetrical amperes) must not be
less than the values stated in the table above.
1.4.5 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
6.3 Ambient
temperature.
178
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