BOC E2M28, Instruction Manual

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E2M28 and E2M30 Rotary Vacuum Pumps
IN
STALLATION
PAGE
19
Issue K 19 Jul 05
3.7 Electrical installation: three-phase motors
3.7.1 Connect the electrical supply to the motor
Note: 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.
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 5. The fuse ratings in Table 5 are provided for guidance only. The supplier of your thermal
overcurrent protection device may specify different values to ensure correct operation of the fuse and
the overcurrent protection device. Ensure that the fuse you use is suitable for the starting currents given
in Table 5. Refer to Figure 8 or 9 as appropriate for 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. The
temperature rating of the cable must be 70
o
C or greater.
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, (Figure 8 or 9). Make sure that
the metal links are connected as shown; if they are not, move the links to the positions shown.
4. Pass the electrical supply cable through the cable-gland and connect to the appropriate terminals,
as shown in Figures 8 and 9. You must tighten the earth (ground) terminal connection to a torque
of 2.13 to 2.87 Nm.
5. Tighten the cable gland until the outer sheath of the cable is firmly gripped. Do not overtighten.
6. Ensure that the gasket seal for the terminal box cover is correctly positioned, then refit the cover
to the terminal-box and secure with the screws.
WARNING
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 and a suitable earth (ground) point.
CAUTION
Ensure that the motor is correctly configured for your electrical supply voltage and frequency. If you
do not, you can damage the motor.