ELGi EN 30X-100, Инструкция по эксплуатации, техническому обслуживанию и запасным частям

Страница: 18 / 108

2.10
General functional description
valve opens and the compressor starts loading. This
ensures very little starting load. Next, the intake valve
opens and the system starts building up pressure. Anti-
vibration mountings reside below the airend and the
motor. This configuration reduces the transmission of
vibration from both the airend and motor to the structure,
reducing noise and ensuring reliability of the parts
mounted on the structure.
2.4.4 Control system
Depending on the demand for compressed air from the
application at a particular time, the compressor needs to
respond accordingly. The compressor, therefore, operates
in either loading or unloading mode to meet this
requirement. The primary objective of these modes is to
save energy and reduce wear and tear on the machine.
The control system ensures a smooth start without
overloading the motor.
The compressor is started in star mode, during which
most of the compressed air is vented to the atmosphere.
This mechanism helps prevent overloading of the motor.
In delta mode, the motor speed stabilizes, the solenoid
valve energizes after 10 seconds of change-over to reduce
load on the motor, the blow-down valve closes, and the
compressor starts loading.
When the receiver pressure reaches the maximum limit, a
signal arrives at the solenoid valve from the control
system. Next, the inlet valve actuates and closes, and the
compressor runs in unloading mode. If unloading mode
continues for more than 5 minutes, i.e., no compressed
air is consumed and thus no decrease in pressure occurs,
the system stops and switches to standby mode. If a drop
in pressure
occurs in
the receiver, the compressor returns to loading mode
automatically.