Page 11 - MOTER BOOK

Performance data notes

Speed / torque & speed / current curves 11

DOL starting
Typical speed/current curve Typical speed/torque curve

(I ) Starting current During the run up period in Star, there must be an
A
(I ) Full load current adequate excess of motor torque over the load
N
(M ) Starting torque or locked rotor torque torque. The change to Delta must not occur until
A
(M ) Pull up torque or run up torque the motor is near the operating speed. Refer to
S
(M ) Pull out torque or breakdown torque Brook Crompton for running up against a load in
K
(M ) Full load torque excess of 70% full load during Star Delta starting.
N
Torque/speed curves for specific motors can be Performance figures are subject to IEC
supplied on request. tolerances. Performance figures are based on a
400 volt winding.
2
2
J (WK or WR ) = GD 2
4
kgm 2
J in lb ft =
2
0.042
Connection diagrams

Star Delta Dual voltage Thermistors

W2 U2 V2 W2 U2 V2
D.O.L
∆
∆
U1 V1 W1 U1 V1 W1
L1 L2 L3 L1 L2 L3
W2 U2 V2 W2 U2 V2 P1 P2
Y∆ Y
U1 V1 W1 U1 V1 W1

Motors => 4kW Connect to thermistor control unit.