Beta Max Beta Lite, Operating And Maintenance Procedures

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www.betamaxhoist.com
1-800-233-5112
4-5
4.3 Electrical
Beta Max portable hoists are designed for 110V AC or 220V AC, 60-cycle, single-
phase or three-phase, 30-ampere circuitry. Models must be ordered as either 110V
AC or 220V AC.
The motor has one primary or strong winding and one secondary or weak winding.
The fail-safe conical brake operates from the inductive forces in the rotor created
by the AC current through the stator wires.
The hoist is equipped with an UP limit switch that interrupts the 24V DC coil of
the UP control relay on remote control models or the primary AC (110V or 220V)
line to the upper limit switch on models without remote control relays. This UP
limit switch is an emergency safety shutoff and should never be used as a
substitute for stopping upward motion.
Push button controls are "deadman" type and work on 24V DC circuitry with
remote control and 110V AC or 220V AC on standard units.
On remote control models, a 24V DC output transformer is connected to the
primary power when the unit is plugged in. The 24V DC power energizes the UP
contactor of the UP limit switch when the hook is not all the way up and the UP
push button is pressed. The 24V DC power also energizes the DOWN contactor if
the DOWN push button is pressed.
When the UP or DOWN push button is pressed, the operating voltage is applied to
the diode bridge. This causes the magnetic brake to overcome the pressure of the
three brake springs and pull the brake stationary plate away from the brake disc.