Novar 1xxx KMB systems
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4.1.20 Parameters 31 through 37 – Alarm Indication/Actuation Limits
If indication or actuation from a condition shown in Table 4.7 is set up, you also need to specify the
relevant quantity’s limit value exceeding which triggers the indication or actuation. The table shows
parameter numbers where the limits are stored, limit setup ranges, and limit default values.
Number of switching operations limit (parameter 36) is shown in thousands.
If neither indication nor actuation from either of the two conditions has been set, the corresponding
limit value is not shown.
Table 4.6: Alarm – actuation
# condition minimum delay of
activation / deactivation
actuation
1
undercurrent
10 / 5 seconds disconnection of all sections
except fixed ones
3
voltage failure
immediately / 5 seconds disconnection of all sections
4 undervoltage maximum 1 minute (depends
on the extent of
undervoltage)
disconnection of all sections
5 overvoltage maximum 1 minute (depends
on the extent of overvoltage)
disconnection of all sections
6 THDI > maximum 1 minute (depends
on the level of THDI)
disconnection of all sections
7 THDU > maximum 1 minute (depends
on the level of THDU)
disconnection of all sections
8 CHL > maximum 1 minute (depends
on the level of CHL)
disconnection of all sections
10
external alarm immediately / 5 seconds disconnection of all sections
Note: Conditions shown above in bold type are set by default.
Table 4.7: Alarm Limits
# condition limit –
parameter
number
limit setup range standard
value
4 undervoltage 31 50 ÷ 100 % U
NOM
(par. 18) 80 %
5 overvoltage 32 100 ÷ 200 % U
NOM
(par. 18) 110 %
6 THDI > 33 1 ÷ 300 % 20 %
7 THDU > 34 1 ÷ 300 % 10 %
8 CHL > 35 80 ÷ 300 % 130 %
11 number of
switching
operations
exceeded
36 10 ÷ 2000 x thousand of switching
operations
1000
13 overheated 37 20 ÷ 60 °C 45 °C
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