Pfeiffer Vacuum DUO 11 ATEX, Руководство по эксплуатации

Страница: 29 / 60

NOTICE
Risk of damage from excess voltage
Incorrect or excessive mains voltage will destroy the motor.
► Always observe the motor rating plate specifications.
► Route the mains connection in accordance with locally applicable provisions.
► Always provide a suitable mains fuse to protect the motor and supply cable in the event of a fault.
– Pfeiffer Vacuum recommends the circuit breaker type "K" with slow tripping characteristic.
5.5.1 Choosing the cable bushing
Selection of the correct cable bushings is entirely the responsibility of the user.
The cable bushings are chosen in accordance with current EU Directive 2014/34/EU
● Select the power supply cable according to the respective application.
● The cable bushings must be suitable for the power supply cable being used.
Procedure
1. Observe the max. permissible tightening torque for the cable gland on the terminal box.
2. Refer to the operating instructions of the respective motor.
5.5.2 Connect three phase motor with 6-pin terminal board
NOTICE
Property damage from high starting torque
The specific load behavior of the vacuum pump requires direct on-line starting at full motor power.
Engine damage occurs if a different starting circuit is used.
► Always start the motor directly.
►
Never use a star-delta start-up circuit.
Ports U1 – L2, V1 – L1 and W1 – L3 rotate the motor shaft clockwise when looking at the motor fan.
W2 U1
L1
V2 V1
W1 U2
L3
L2
W2 U2 V2
U1 V1 W1
L1 L2 L3
Fig. 9: Delta connection for low voltage
The 3 phases are connected in series, and their connection points connected to the mains. The voltage
per phase is equal to the mains voltage, while the mains current is √3 times the phase current. The del-
ta connection is marked with the ∆ symbol. The voltage between the incoming mains supply lines is
called mains voltage. The mains current is the current flowing in the incoming supply lines.
W2
U1
L1
V2
V1
W1
U2
L3
L2
W2 U2 V2
U1 V1 W1
L1 L2 L3
Fig. 10: Star circuit for high voltage
Installation
29/58