Electrical Installation: Three-Phase Motors; Connect The Pump To Your Electrical Supply - Edwards E1M5 Instruction Manual

3.7

Electrical installation: three-phase motors

3.7.1

Connect the pump to your electrical supply

Ensure that the electrical installation of the pump conforms with your local and national
safety requirements. It must be connected to a suitably fused and protected electrical supply
If your pump-motor can be used with more than one voltage range, you must ensure that the
motor is confi
Note:
We recommend that you connect the electrical supply 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 Table 2. The fuse ratings in Table 2 are provided for guidance only. The supplier
of your thermal over-current protection device may specify different values to ensure correct
operation of the fuse and the over-current protection device. Ensure that the fuse you use is suitable
for the starting currents given in Table 2. Table 2 also gives the figure reference of the correct
electrical supply connection diagram for your motor.
The diameter of the outer sheath of the electrical cable must be in the range 10-14 mm. The cable
must conform in size and colour coding with your local and national electrical installation
regulations.
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.
3. Refer to the electrical supply connection diagram for your pump, (Figures 12, 13, 14, 15, 16 or
17). Make sure that the metal links are connected as shown; if they are not, move the links to
the position shown.
4. Pass the electrical supply cable through the cable-gland and connect to the appropriate
terminals, as shown in Figures 12, 13, 14, 15, 16 or 17.
5. Tighten the cable gland until the outer sheath of the cable is firmly gripped. Do not overtighten.
20
ed for your electrical supply voltage and frequency. If you do not, you may
gur
The pump will restart automatically when the electrical supply is restored after an interruption.
If you do not want the pump to restart automatically, use electrical control equipment which must
be reset manually.
WARNING
and a suitable earth point.
CAUTION
damage the motor.
E2M2, E1/E2M5 and 8, E2M12 Rotary Vacuum Pumps