10
Motor
Manual
5.3 Connection diagram
As standard all three-phase motors are suitable for 400 V
connection, unless otherwise stated.
• Motors with nameplate data D/Y 230/400V are connect-
ed as star (Y).
• Motors with nameplate data D/Y 400/690V are connect-
ed as delta (D).
The connection diagram is labelled inside the terminal box.
Generally, power to motors must be supplied and protected
through protective devices such as RCDs, fuses, MCBs, MC-
CBs, etc. The connection diagram for Y/D is shown in Fig-
ure 1.
Figure 1 Connection types Y/D
Star-delta starting
Hoyer standard motors are suitable for star-delta starting.
The starting current and torque in Y mode are approxi-
mately one-third of the starting current and torque in D
mode. Make sure there is enough starting torque to acceler-
ate the total load with star connection.
To Next Page
Loading...
