Autoquip FREIGHTLIFT FLH - Manual (Page 16)

16
CONTROL TRANSFORMER SECONDARY FUSE
This fuse is attached to the electrical control transformer and protects the 115 volt
control circuit from damage should a fault occur which would result in excessive electric
current flow. Should the fuse activate (blow), it will prevent the operation in either
direction and the interlock circuit will not operate. These fuses are located in the control
enclosure.
DANGER !
High voltage! May cause personal injury or death. Repairs
should only be performed by a qualified electrician or service technician
and OSHA requirements for Lock-Out, Tag-Out must be followed!!
MOTOR STARTER OVERLOADS (MSO)
These are current sensing devices that are located in the three legs of the electric motor
primary power circuit (208, 230, or 460 volt). They protect the motor from excessive
current draw if it becomes overloaded, experiences low line voltage, or has a short
circuit. Should any leg sense an over-current situation, the element will heat up and trip
the heat sensitive device housed in the motor starter coil circuit. Power is removed to
the coil and the three line power contacts are opened in the motor primary power circuit.
This will stop the motor from rotating until the overloads are reset and/or the fault is
cleared which caused the trip condition.
NOTE: The MSO will only affect the “UP” circuit. The platform carriage can be lowered
if the MSO trips.
PERSONNEL GUARDS
Depending on the application, one or more of the following personnel protection
features is included in the design of this equipment (different states may vary on the
exact design and orientation of these features – IT IS IMPORTANT TO BECOME
FAMILIAR WHICH THE SPECIFIC CODE REQUIREMENTS OF YOUR STATE):
- GATES & ENCLOSURES: Required per ASME B20.1 to protect personnel from
inadvertent physical contact with a moving lift & moving load at all lift landings.
- CARRIAGE RAILINGS & SNAP CHAINS: Required per ASME B20.1 to protect
personnel whenever personnel walk onto the lift carriage when in the raised
position. Railings or side guards protect non-operating sides, snap chains protect
operating sides.
- CARRIAGE BACK-STOP PANELS: Additional safety feature recommended at all
upper levels to provide additional fixed guarding 2” (max.) away from & across all
unused, operating sides of the lift (typical with non-shaftway “Z” & 90 degree load
patterns).
SAFETY FEATURES