Electrical Connection - Grundfos CRE Betriebsanleitung

Electrical connection

Conductors
See section requirements, page 10.
7.2 Cable
Torques
Maximum tightening torques for the terminals can be
found in section Torques, page 61.
Line reactors
Maximum line reactor size must not exceed 1.5 mH.
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 %.
Technische Änderungen vorbehalten.
75