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7.2. Pressure monitoring devices
A device for monitoring the gas in the switch-disconnector
can be installed on the front of the panel. The devices
described below can be installed.
Temperature compensated pressure switch (Pressure
regulator)
The device is self-powered and maintenance-free. The
operator communicates with the device by means of two
pushbuttons on the front.
Pushbutton 1: Check: shows whether the display is
functioning correctly;
Pushbutton 2: Interrogates the monitoring device: the
following information can be displayed:
− OK: correct operating pressure;
− Low: low pressure (minimum level for operation)
− Very low: insufficient pressure (operation cannot be
performed). These indications can be displayed remotely by
means of 2 contacts built into the device.
Pressure gauge
The device detects the measurement in temperature
compensated zones and monitors the operating pressure of
the gas in the switch-disconnector.
The pressure gauge has 2 reference zones:
− green: correct operating pressure;
− red: insufficient pressure (operation cannot be
performed).
There is also a version with remote indications.
Fig. 60
Fig. 61
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