Electrical Connection - Grundfos MTA series Montage- Und Betriebsanleitung

6. Electrical connection

The electrical connection should be carried out in
accordance with local regulations.
Warning
Never make any connections in the pump
terminal box unless the power supply has
been switched off.
The operating voltage and frequency are marked on
the pump nameplate. Make sure that the motor is
suitable for the power supply on which it will be used.
The motor must be connected to a motor-protective
circuit breaker.
We do not recommend operation via frequency
converter.
Terminal box positions
The terminal box can be turned to another position.
Terminal box positions
Pump
9 o'clock
(standard)
MTA 30
MTA 60
MTA 90
MTA 120
MTA 200
MTA 20H
MTA 40H
MTA 70H
MTA 100H
●
The terminal box can be turned to another
position after delivery.
( ● ) The terminal box cannot be turned to another
position after delivery. The pump must be
ordered with the terminal box in position 3
o'clock.
3 o'clock
● ●
● ●
● ●
( ● )
●
( ● )
●
● ●
● ●
● ●
( ● )
●
Standard
9 o'clock
Outlet
Fig. 7 Terminal box positions (top view)
Proceed as follows:
1. Remove the bolts securing the motor to the
pump.
2. Turn the motor to the required position.
3. Refit and tighten the bolts securing the motor to
the pump.
The electric motor should be connected to the supply
as shown in the diagram inside the terminal box
cover.
Outlet
3 o'clock
9