Electrical Installation: Three-Phase Pumps; Check And Configure The Motor; Connect The Pump To The Local Electrical Supply - Edwards RV3 Instruction Manual

3.7

Electrical installation: three-phase pumps

3.7.1

Check and configure the motor

Ensure that the motor is correctly configured for the local electrical supply. If the pump is operated when the
motor is not correctly configured for the electrical supply, the motor will be damaged.
1. Remove the screws which secure the cover of the motor terminal-box. Remove the cover.
2. Remove the cable-gland from the inside of the terminal-box and fit the cable-gland to the cable leadthrough
hole in the side of the terminal-box.
3. Ensure that the motor is correctly configured for the local electrical supply. If necessary, reconfigure the links
(Figure 5 and Figure 6, item 1) to suit the local electrical supply:
For 200–230 V electrical supplies, the links must be configured as shown in

For 380–460 V electrical supplies, the links must be configured as shown in

3.7.2

Connect the pump to the local electrical supply

Ensure that the electrical installation of the RV pump conforms with local and national safety
requirements. It must be connected to a suitably fused and protected electrical supply and a
suitable earth (ground) point.
Notes: To prevent automatic restart of the pump-motor if the electrical supply is restored after an electrical
supply failure, connect the pump to the electrical supply through suitable control equipment which
must be reset manually after an electrical supply failure.
Edwards recommends that the electrical supply is connected to the motor through a starter or circuit breaker which
has thermal over-current protection which can be adjusted to suit the full load current ratings shown in
The fuse ratings in Table 13
device may specify different values to ensure correct operation of the fuse and the over-current protection device.
Ensure that the fuse used is suitable for the starting currents given in
1. Remove the cover from the motor terminal box.
2. Remove the cable-gland from the inside of the terminal box and fit the cable-gland to the cable leadthrough
hole in the side of the terminal box. Using a tool this should be tightened to a torque of 3.75 Nm.
3. Pass the electrical supply cable through the cable-gland. The diameter of the electrical supply cable should be
in the range 7 to 11 mm.
4. Use insulated crimped connectors to connect the wires in the cable to the terminals U1, V1 and W1 and Earth
(ground) in the terminal-box as shown in
tightened to a torque of 2.13 to 2.87 Nm.
5. Tighten the dome-shaped nut on the cable-gland until the outer sheath of the cable is firmly gripped. Using a
tool this should be tightened to a torque of 2.5 Nm, do not overtighten.
6. Ensure that the cover gasket is correctly positioned, then refit the cover to the terminal-box and secure with the
screws.
© Edwards Limited 2018. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
CAUTION
WARNING
are provided for guidance only. The supplier of the thermal over-current protection
Figure 5 and
Table 13.
Figure 6. The earth (ground) terminal connection must be
A652–01–880 Issue Y
Figure 5.
Figure 6.
Table 13.
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