SPX Cooling Technologies TG MAG86-100 Benutzerhandbuch

36

U

U

delta

star

delta

star

L1

L1

L2

L2

L3

L3

N

N

U1  V1 W1

  

U1 V1  W1

  

W2 U2 V2

  

W2 U2 V2

  

A.0500.551 – IM-TGMAG/02.00 EN (02/2008)

Circuit breaker
For safety work on a pump unit, install a circuit breaker as close as possible to the machine. It also is 
advisable to place an earth fault circuit breaker. The switching equipment must comply with prevailing 
regulations, as stipulated by EN 60204-1.

Motor overload protection
To protect the motor against overloads and short-circuits a thermal or thermo-magnetic circuit 
breaker must be incorporated. Adjust the switch for the nominal current absorbed by the motor.

•  Do not use a star-delta circuit with electric motors due to the required high starting torque.

•  For single-phase alternating current, use motors with a “reinforced” starting torque.

•  Ensure a sufficiently high starting torque for frequency-controlled motors and adequate cooling

of the motor at low speeds. If necessary, install a motor with forced ventilation. 

U (volt)

230/400 V

400 V

3 x 230 

V

delta

–

3 x 400 V

star

delta

When using a combustion engine in the  
pump unit, see the engine instruction  
manual included in the delivery. Contact  
the pump supplier if the manual is not  
included.
Irrespective of this manual the following  
must be respected for all combustion  
engines:

•  Compliance with local safety regulations
•  The exhaust of combustion gases must be screened to avoid contact
•  The starter must be uncoupled automatically once the engine has started
•  The pre-set maximum number of engine revolutions may not be modified
•  Before starting the engine, the oil level must be checked

•  Never run the engine in a closed area
•  Never refuel the engine while it is still running

Internal gear pumps demand a relatively high starting torque. During the operation shock loads occur 
due to pulsations inherent to the gear pump principle. Therefore, choose a coupling which  
is 1.5 times the torque recommended for normal constant load.

Fit – without impact tool – both halves of the coupling to the pump shaft and the motor shaft 
respectively.

Alignment  
The pump and motor shafts of complete units are accurately pre-aligned in the factory. After  
installation of the pump unit, the pump and motor shaft alignment must be checked and 
re-aligned if necessary.