6.6 Electrical connections
WARNING: PROTECTIVE EARTH CONNECTION
Risk of injury or damage to the equipment. The pump must be adequately earthed to
prevent the accumulation of static electricity. The electrical junction box must only be
opened and electrical connections made when no explosive atmosphere is present.
WARNING: DANGEROUS VOLTAGE
Risk of shock. The electrical connections must only be provided by a trained
electrician as specied, for example, by the regulations EN 50110-1. Note the
national r
egulations of the country in which the equipment is being operated.
During all connection work, the mains power supply lines must be de-energised
(Lockout/Tagout). To prevent the pump from operating unexpectedly after a mains
power failure, the pump must be integrated with the control system in such a way
that the pump can only be switched on again manually. This applies equally to the
emergency cut-out arrangements. Observe safety information given in Electrical
hazards on page 9.
CAUTION: DAMAGE TO THE PUMP
Risk of damage to the equipment. Observe the direction arrow on the motor fan
cover. It is recommended to check the dir
ection of rotation with a phase sequence
indicator.
Prolonged operating of the motor in the wrong direction of rotation will damage the
pump.
In the case of custom pumps note the information provided on a separate sheet.
For connecting the motor, follow the schematics provided on the motor
nameplate or in its junction box, given your local mains voltage and
frequency. Electrical connection work must only be carried out by a qualied
electrician in accordance with the applicable safety rules, see IEC 60204-1
and 61010-1.
The pump is supplied with a three-phase motor but without accessories for
electrical connection. They must be connected with the appropriate cable
and a suitable motor protection switch.
Set the switch in accordance with the rating on the motor nameplate.
Observe the diagram at the motor.
After connecting the motor and after every time you alter the wiring, check
the direction of rotation. To do so, briey switch on the motor and check
whether a suitable cover (for example- a blank ange) is sucked in at the
intake port. If not, interchange two phases of the connection.
For motor wiring information, refer to the motor nameplate or the cover of
the motor terminal box. You can congure the dual voltage motors to
operate with either the high range or the low range electrical supply.
To reverse operating invert L1 and L2.
33
300956027_002_A0 - 03/2022 - © Leybold
Installation
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