Installation
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300407956_002_C1 - 01/2017 - © Leybold
3.6.1 Standard- and C-Type Pumps
Figure 3.4 (RHS) shows the mains connecting methods for different voltages.
The terminal is designed for voltage ranges of 200 – 220V (cf. upper array),
or 380 – 420V (50 Hz) and 420 – 460V (60 Hz) (cf. lower array).
The LEYVAC has
no
switching devices of its own. Install an adequate motor
protection switch for the equipment. The pumps are equipped with two ther-
mal switches for motor and casing protection, and a Pt1000 sensing device
for measuring the motor’s temperature (cf. Fig. 3.3).
The motor must only be operated with an overprotection circuitry in
place.
Connect the factory-integrated Pt 1000 temperature sensor, and the ther-
mal switch of the casing (SW85) to the protection circuit of the equipment,
to prevent pump damage.
The Pt1000 serves the purpose of thermally monitoring the water-cooled
motor. It is recommended to set a warning and a shut down at temperatu-
res of 85 °C and 100 °C, respectiviely, to protect the pump in case of
unsufficient cooling water qualities or flow rates. The thermal switch of the
motor (SW90) can be used as an alternative to the Pt 1000, if fresh water
with sufficient pressure is used as coolant.
Refer to the table below for the trigger temperatures.
Electric Device (cable)
Status Action Temperatures Reset Temperatures
Motor Thermal Switch (black)
NC
90 °C
50 – 60 °C
Casing Thermal Switch (white)
NC
85 °C
45 – 65 °C
NOTICE
Fig. 3.4 Electrical connections: PE grounding,
Thermal switch (motor) and PT 1000,
and motor wiring
PE
200V
400V
