Prowinch PWMD Series, User Manual And Security Warnings

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Fig.7b The Double-motor Group of Electric Hoist Model MDI 10t
2.2.3 Electric Devices
The electric devices of the electric hoist Model CDI, MDI consists of Control Cabinet, Push Button Station and Power-cut Space Limi-
ter. The electrical principle scheme refers Fig. 9a~9b (Electricity Components in the Fig. please refer Table 2).
Control Cabinet is mounted to electric trolley with a connecting shelf. The stationary type of hoist will be fixed according to field
condition by users. The electric units should be fixed and fitted at the connecting board, while the cable is connecting with terminal
panel. The electricity control and operation is at safety voltages( normally is 36v).
The power-cut space limiter is used to prevent accident which may be caused by the loads exceeds the limited position when it goes
up or down. When the load reaches the limit position,the Rope Guide Device in Fig.1a(10) which moves axially impacts against the
Stop Block Fig.1a(11) on the space limiting lever, causing the space limit lever to push (or pull) the limiter so as cut off the circuit of
hoisting motor, then the load will stop moving. Push the button of the opposite direction, the load will disengage from the stabled
condition.
Be care the power-cut space limiter will not be used as path switch.
MAIN STRUCTURE &
RUNNING PRINCIPLE