5 | Installation
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0870207738_RA_RC0400-0630C_USA_-_IM_en
5.4 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
NOTE
The operation with variable speed, i.e. with a variable frequency drive or a soft starter, is
allowed as long as the motor is admitted and the permitted motor speed range is neither
underrun nor exceeded (see
Technical Data [
►
27]
).
Seek advice from your Busch representative.
• Make sure that the motor is connected according to local electrical codes.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the motor.
• The power supply must be routed through a fused switch to protect the motor against
electrical or mechanical overloads.
• The motor starter has to be set consistent with the motor current listed on the motor
nameplate.
• Make sure that the motor of the vacuum pump will not be affected by electric or elec-
tromagnetic disturbance from the mains; if necessary seek advice from Busch.
• Ensure the electrical connection is properly grounded.
• Electrically connect the motor.
• Electrically connect the temperature switch (TS) so that the vacuum pump stops when
the exhaust temperature reaches 240 °F.
If the vacuum pump is equipped with a level switch:
• Electrically connect the level switch so that the vacuum pump stops when the oil
level is too low.
NOTICE
Incorrect connection.
Risk of damage to the motor!
• Check the inside of the terminal box for motor connection instructions/diagrams.
WARNING
Exhaust temperature switch is not connected.
Risk of severe injury!
Risk of damage to the vacuum pump!
• The vacuum pump comes with an exhaust temperature switch. Wire this switch into
the starter control circuit so that when the set point is reached, power is shut off to
the pump.
