MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 17)

Model 505.60 HPU Component Identification
Model 505.60 - 505.180 SilentFlo™ HPU Introduction 17
Component Descriptions
Component Description
Commoning Expansion
Plate Allows the HPU to be commoned with another HPU.
Electrical Enclosure Houses the HPU’s electrical and control components. The wye-delta starters
for the Model 505.60/.90 HPUs are located in the electrical enclosure. The
wye-delta starters for the Model 505.120/.150/.180 HPUs are located in the
pump assemblies. The main power lines enter the electrical enclosure at its top.
The power disconnect switch removes electrical power whenever the
enclosure’s door is opened.
Filler Cap Vents the hydraulic fluid reservoir. This is where you add hydraulic fluid.
Filter Filters particles out of the hydraulic fluid as it is returned to the HPU.
Fluid Level Gage Indicates the reservoir hydraulic fluid level.
Heat Exchanger Cools the hydraulic fluid using a highly efficient, stainless steel oil-to-water
heat exchanger. The heat exchanger removes most of the heat generated by the
HPU.
Level/Temperature
Transducer Senses the hydraulic fluid level and temperature, and produces an analog
signal for display purposes.
Low Level/Temperature
Switch Senses the hydraulic fluid level and temperature. Control interlocks
automatically shut the HPU down if the fluid level drops too low or the
hydraulic fluid temperature rises above the sensor’s setting.
Manifold Combines the output of the individual pumps to deliver the full output of the
HPU through a single port. The manifold provides solenoid control of the high/
low pressure output from the individual pumps. It also contains relief valves
for each pump circuit and a bypass circuit to maintain the hydraulic
temperature during low flow conditions.
Output Pressure Controls Sets the output pressure of each pump assembly.
Power Disconnect Switch Disconnects the incoming power from the HPU. The switch is a lockable,
mechanical latch. Power is removed whenever the door to the electrical
enclosure is open. The switch will not allow the door to be opened when in the
ON (|) position. Incoming power lines to the switch are live unless power is
removed externally.
Pump Assemblies Produces the pressurized hydraulic fluid for system use. Each pump assembly
includes a motor, pump, and electrical enclosure for connecting with the main
starter.
Reservoir Holds the hydraulic fluid and houses the pump and motor.
User Interface Panel Configures and controls the operation of the hydraulic power unit and indicates
the current status of several sensors.