All about Motors
Direct-on-line start of three-phase motors
Two directions of
rotation, DIUL reversing contactor
Fuseless without overload relay
Short-circuit protection and overload protection by means of
motor-protective circuit-breaker PKZM or circuit-breaker NZM.
Fuse size in the supply line in accordance with Moeller Main Catalogue,
Industrial Switchgear or AWA installation instructions.
Fuses with overload relay
Short-circuit protection1) for contactor and overload relay by means of
fuses F1.
Short-circuit protection1) for contactor by means of fuses F1.
1) Fuse size in accordance with data on the rating plate of the overload
relay F2
Reversing after actuation of
pushbutton 0
Q11: Mains contactor, clockwise
Reversing without actuation of pushbutton 0
Q12: Mains contactor, counterclockwise
Method of operation: Actuation of pushbutton I energizes the coil of
contactor Q11. It switches on the motor running clockwise and maintains
itself after button I is enabled via its own auxiliary contact Q11/14-13
and pushbutton 0 (three-wire control contact). The normally closed
contact Q11/22-21 electrically inhibits switch on of contactor Q12. When
pushbutton II is pressed, contactor Q12 closes (the motor runs in the
anticlockwise direction). Depending on the circuit, direction can be
changed from clockwise to anticlockwise either after pressing pushbutton
0, or by directly pressing the pushbutton for the reverse direction. In
the event of an overload, normally closed contact 95–96 of the overload
relay F2 or normally open contact 13–14 of the motor-protective
circuit-breaker or circuit-breaker will switch.
