Control And Driving System - Hertz HSC serie Bedienungshandbuch

4.4 WORKING PRINCIPLES OF AIREND UNIT
The airend unit on HSC series is a single stage, oil injected and positive displacement unit. The airend unit
is composed of two special constructed rotors that operate in parallel to each other, the bearings of rotors
and the rotor casing / body that maintains these rotors. The rotors are asymmetric helical profiled of male
and female structure.
When the male profile is driven by motor, it turns with female profile in the casing / body.
The air received from the suction side is trapped by the rotors and directed towards the outlet port
inside the casing / body and compressed.
Contact of profiles to each other is prevented by the oil that enters the airend; the oil also prevents the
slip of compressed air backwards.
ANY KIND OF MODIFICATION ON THE AIREND UNIT WITHOUT THE PERMISSION OF OUR
COMPANY ABOLISHES THE FULL GUARANTEE OF THE COMPRESSOR

4.5 CONTROL AND DRIVING SYSTEM

It controls the operation of the electrical motor and coupled electrical systems of your compressor. It can be
evaluated into two sub groups; electronic controller unit and starting system controlled by this.
-ELECTRONIC CONTROLLER UNIT
It enables you to make all related operational adjustments of your compressor. Pressure and temperature
values, failures and service periods are easily traced.
In the enclosed number 2 booklet you will find all usage and adjustment data related with controller
unit.
-STARTER SYSTEM
Your system is equipped with star-delta or inverter controlled start up systems. This system is designed to
protect your system from all kinds of failure situations of all equipments.
There is an Emergency Stop button in right of control panel for emergency situations. This button is
easily accessible.
As all contactor, thermal fuse and all cable connection elements are defined by code, they can be easily
traced from electrical wiring diagram and on the machine.
WYE-DELTA STARTER: Is used to avoid excessive power from network during start and for preventing the
mechanical damage that may cause by full speed start up.
When you want to start the compressor, first the star contactor and afterwards the main contactor are
energized the compressor motor is started up. Your compressor does not deliver air during star period.
After 4-6 seconds the compressor reaches the normal speed, the star contactor releases and the delta
contactor is energized. This way your compressor is switched on full power.
When you want to stop the compressor the energy of the contactors are removed and the motor stops
freely.
FREQUENCY INVERTER DRIVING: In the inverter application, the motor speed is changed in the course of the
pressure data received from system. And constant air pressure is obtained in the compressed air system. This
way the most economic operation is obtained and the losses in other systems are prevented.
When you want to operate the system, the inverter is switched on and this allows reaching your
compressor to maximum speed from zero speed smoothly.
When maximum speed is reached, the compressor starts to produce air.
When you want to stop the compressor; again like start up the motor is smoothly decelerated and
stopped.
In the enclosed number 3 booklet; "Control and start up system" named group lists and related
electrical wiring diagrams, installation pictures and part lists of two systems are included.
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