Branch-Circuit Protection - Grundfos CRE Montage- Und Betriebsanleitung

P2
[kW]
0.25 - 3
4
5.5
7.5
11
Exceeding these values creates resonance between the reactor and the drive, which reduces the life of the
product.
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, the circuit breaker 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 %.
2164
Maximum line reactor
[mH]
1450-2000 rpm
1450-2200 rpm
1.5
0.7
0.9
0.6
0.3
2900-4000 rpm
4000-5900 rpm
1.5
0.7
0.3
0.6
0.3