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5.4.6. Protection class
Some devices are equipped with cartridge protection – temperature protection, which is realized on the basis
of the temperature value measured by an independent temperature sensor, the so-called security sensor.
The main aim of the cartridge protection is to protect against uncontrolled rise or fall in temperature. At the
moment of activation, the relay disconnects the heating / cooling power supply.
There are five classes of cartridge protection:
Class 1 – there is no under and over temperature protection
Class 2 – over temperature protection – when the temperature drops below the set protection value, the power
does not turn on automatically - the user must do it by pressing „confirm” on the alarm panel. (Figure 13)
Class 3.1 – over temperature protection – when the temperature drops below the set protection value, the
power turns on automatically.
Class 3.2 – under temperature protection – after rising the temperature above the set protection value, the
power turns on automatically.
Class 3.3 – over and under temperature protection – combination of classes 3.1 and 3.2
The temperature set in the segment can not be higher than the upper protection temperature less 2 ° C, e.g.
the upper protection temperature: 50°C the maximum temperature set in the segment that can be given is
48°C.
More information see » page 61.
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