Appendix
35
Appendix
25. Installation in the USA and Canada
25.1 Electrical connection
25.1.1 Conductors
Use minimum 140/167 °F (60/75 °C) copper conductors only.
25.1.2 Torques
Power terminals
Power terminal:
1.7 ft-lbs
Relay, M2.5:
0.4 ft-lbs
Input control, M2: 0.15 ft-lbs
25.1.3 Line reactors
Max. line reactor size must not exceed 2 mH.
25.1.4 Fuse size/circuit breaker
If a short circuit happens the pump can be used on a power
supply delivering not more than 5000 RMS symmetrical amperes,
480 V maximum.
Fuses
When the pump is protected by fuses they must be rated for
600 V. Maximum sizes are stated in table below.
Up to 10 Hp use Class K5 UL Listed fuses. For 10 to 30 Hp use
any class UL Listed fuse.
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 table below.
USA - Hp
25.1.5 Overload protection
Degree of overload protection provided internally by the drive,
in percent of full-load current: 102 %.
25.2 General considerations
For installation in humid environment and fluctuating
temperatures, it is recommended to keep the pump connected to
the power supply continuously. This will prevent moisture and
condensation build-up in the terminal box.
Start and stop must be done via the start/stop digital input
(terminal 2-3).
Subject to alterations.
1RWH
1RWH
In order to maintain the UL/cUL approval, follow
these additional installation instructions.
The UL approval is according to UL508C.
2-pole
4-pole
Fuse size
Circuit breaker type/model
1
1
25 A
25 A / Inverse time
1.5
1.5
25 A
25 A / Inverse time
2
2
25 A
25 A / Inverse time
3
3
25 A
25 A / Inverse time
5
5
40 A
40 A / Inverse time
7.5
–
40 A
40 A / Inverse time
10
7.5
50 A
50 A / Inverse time
15
15
80 A
80 A / Inverse time
20
20
110 A
110 A / Inverse time
25
25
125 A
125 A / Inverse time
30
–
150 A
150 A / Inverse time
DBP-1 - GRUNDFOS PUMP CRE - 99392005
Summary of Contents for SPKE Series
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