R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist TDU Motorized Trolley User Manual
Page 10
R&M Materials Handling, Inc
LoadMate Chain Hoist
Springfield, Ohio USA
TDU Instruction Manual
(: 800 955-9967
Revision 2
web:
www.rmhoist.com
08/13/02
RM-LM-TDU-MAN-1999-2-ENG.doc
10
Motor and Brake
1. Brake
Assembly
2. Brushes
3. Rotor
Stator
4. Gear Reducer
5. Printed Circuit Board
6. Control Enclosure
Motor
Two phases of the power supply are used where one phase is always energized.
Reminder:
With reference to the standards, the user must provide an emergency shutdown or mainline
disconnect switch at a maximum of 24 feet from the trolley. On the electric chain hoist, a mainline contactor
is provided in hoist control enclosure as standard.
Note:
If the motor has been in a humid atmosphere, it is advisable to check the insulation resistance. This
should not be less than 5000 ohms per volt of rated voltage.
Brake
Braking occurs when the D.C. coil is de-energized. The asbestos free friction material is on each side of the
disk. The energized coil pulls the disc against the spring and releases the brake. Once the coil is de-
energized the spring applies a clamping force, setting the brake.