Electrical Connection - Grundfos SP 1A Montage- Und Betriebsanleitung

6. Electrical connection

DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply before starting any work
on the product.
‐
Make sure that the power supply cannot be accidental-
ly switched on.
DANGER
Electric shock
Death or serious personal injury
‐
The pump must be earthed.
‐
The pump must be connected to an external main
switch and shall be provided with a means permitting it
to be locked in the OFF (isolated) position. Type and
requirements as specified in EN 60204-1, 5.3.2
The electrical connection must be carried out by an au-
thorised person in accordance with local regulations.
The supply voltage, rated maximum current and cos φ appear from
the separate name plate which must be fitted close to the
installation site.
The required voltage quality for MS and MMS motors, measured at
the motor terminals, is - 10 %/+ 6 % of the nominal voltage during
continuous operation (including variation in the supply voltage and
losses in cables).
Check also that there is voltage symmetry in the power supply lines,
i.e. same difference of voltage between the individual phases. See
Appendix, item 2.
If MS motors with a built-in temperature transmitter (Tempcon) are
not installed together with an MP 204 motor protection unit, they
must be connected to a 0.47 μF capacitor approved for phase-
phase operation (IEC 384-14) to meet the EC EMC directive
(2004/108/EC). The capacitor must be connected to the two phases
to which the temperature transmitter is connected. See fig.
Connection of capacitor.
Connection of capacitor
12
Conductor
The motors are wound for direct-on-line starting or star-delta
starting, and the starting current is between four and six times the
rated current of the motor.
The run-up time of the pump is only about 0.1 second. Direct-on-
line starting is therefore normally approved by the power supply
company.
1
2
3
4
Colours of the conductors
Flat cable
1 = L1 Brown
2 = L2 Black
3 = L3 Grey
4 = PE Yellow and green
Single conductors
Black
Yellow
Red
Green