V2.00
19837_EDEBD
A0227-2620-1_EN
48
System operation
The default settings are:
Switching threshold fan
= 28°C / hysteresis = 5°C
Switching threshold alarm
= 45°C / hysteresis = 5°C
Switching threshold overtemperature
= 48°C / hysteresis = 5°C
This means that the fan switches on when 28°C is exceeded and switches off again when
the temperature drops below 23°C .
The overtemperature alarm is triggered when 45°C are exceeded and is reset when the
temperature drops below 40°C .
The overtemperature stage switch-off is activated when 48°C are exceeded .
After the temperature has dropped below 43°C, the stages are hooked up again if re-
quired, after the discharge time has elapsed .
The setting range of the overvoltage switch-off goes up to 150% of the measuring
voltage, i .e . for a programmed measuring voltage of primarily 400V Ph/Ph, the setting
range is 400V to 600V Ph/N . The setting range is dependent on the programmed primary
measuring voltage .
When the limit for the overvoltage switch-off is exceeded, the hooked up compensation
stages are immediately switched off . After the temperature has dropped below the limit
by 1% of the limit, the compensation stages are hooked up again after the discharge time
has elapsed .
NOTE
The default setting for the overvoltage limit is, for a measuring voltage of 400V PH-Ph
10% more, i .e . 440 V PH-PH . In case of operation via voltage transformer, the limit is set
respectively higher!
Example: For a voltage transformer of 700V PH-PH
primary and 100 V PH-PH secondary, the limit is set to 770V PH-PH (770 V PH-PH + 10% (=
70 V) equals 770 V PH-PH) .
The limit is dependent on the primary voltage!