Page 98 - Electromechanical Devices and Components Illustrated Sourcebook

60 Electromechanical Devices & Components Illustrated Sourcebook

Forward Contactor
Heater Set

RESET 220/240 VAC COIL Power
MOTOR
CONTROLLER

CONTACTOR
20 HP / 30 AMP
24 VAC COIL
Reverse Contactor
Fwd./Off/Rev.
Switch
Chassis Ground
460/480 VAC Control Transformer
115/120 VAC
Internal Panel
Enclosure

Motor
Figure 4-71 Three-Phase Reversible Motor Controller

Heaters
240/480 VAC
Three Phase

Motor C 1 2
Controller
Main 5 M 3
6 4

Motor

C
Delta On/Off Switch

NC
NO
115 VAC
T L Control
C Transformer
Wye Delay on
Relay

Figure 4-72 Delta/Wye Motor Controller Schematic