Elmo Rietschle R-VWP 500/1000/1500/2500 - Manual (Page 19)

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Installation
5.7 Connecting the motor
DANGER
Danger of death if the electrical installation has
not been done professionally.
The electrical installation must only be done by a
qualifi ed electrician observing EN 60204. The
operating company has to provide the main
switch.
a) The motor‘s electrical data is given on the data
plate (Fig. 2, 3/N) or on the motor data plate
(Fig. 2, 3/P
1
). The motors comply with DIN EN
60034 and are in protection class IP 55 and
insulation class F. The appropriate connection
diagram is located in the motor‘s terminal box
(not for the plug connection version). The motor
data must be compared with the data of the
existing mains network (current type, voltage,
network frequency, permitted current value).
b) Connect the motor via the motor protection
switch (for safety reasons, a motor protection
switch is required and the connecting cable
must be installed via a cable fi tting to provide
strain relief).
We recommend using motor protection switches
with delayed switch off, depending on possible
excess current. Temporary excess current may
occur when the machine is started cold.
c) The electrical control should be designed to start
the pre-pump before the Roots pump or simulta-
neously.
NOTICE
Power supply
The conditions at the installation location must match
the information on the motor data plate.
Without derating the following is permissible:
• ± 5% Voltage deviation
• ± 2% Frequency deviation