Thytronic NA20, Manual, Page: 46 / 208

FUNCTION CHARACTERISTICS
46 NA20 - Manual - 04 - 2022
All alarm and/or trip elements can be enabled or disabled by setting
ON
or
OFF
the
ThALx Enable
e
Th>x Enable
parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermo-
metric probes - 26 \ PTx Probe \ ThALx Alarm (ThALx Trip) where x = 1...8 .
Each trip threshold (Th>x) may be associated with the breaker failure (BF) function by setting
ON
the
Th>xBF
parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermometric
probes - 26 \ PTx Probe \ ThALx Trip where x = 1...8.
[1]
Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu.
Fun-F26.ai
Logic diagram for thermal protection with RTD thermometric probes (26)
T°
≤
+24 5.0°C
T°
>
Pt
x
>
Pt
x
Pt1
Pt2
Pt3
Pt4
Pt5
Pt6
Pt7
Pt8
0 T
TR
IP
PIN
G
M
AT
RIX
(
LE
D+R
EL
AY
S)
T°
>
Th
ALx
Pt100- x Trip
Pt100- xAlarm
t
Th
>
x
t
ThALx
BF Enable (ON ≡ Enable)
Pt100 OK
Pt100 FAULT
Th>xBF
TOWARDS BF LOGIC Th>x BF_OUT
TOWARDS DIAGNOSTIC Pt
x
> Diagnostic
TRIP
&
&
&
T°
≥
-4 9.0°C
0 T
ThALx-K
ThALx-L
Th>x-K
Th>x-L
Th
ALx
Th >
x
t
ThALx
t
Th
>
x