Environmental Engineering Reference
In-Depth Information
Table 11.3 (continued)
System pro M compact
Technical details: tripping characteristics
MCBs
Tripping characteristics
Acc. to
Thermal release
current
Electromagnetic release
currents
Tripping characteristic and
rated current
Tripping
time
Tripping
time
Conventioel non-
trpping c
-
Conventional
tripping c
-
Hold current
surges
Trip at
least at
[1h
´
DIN VDE
0660
1.2
1
n
3
1
n
\0.2 s
8/69 1.5
1
n
[2 min
´
Part 101 6.0
1
n
[2 s (T1)
Taken from Sect. 10 of
http://www05.abb.com/global/scot/scot209.nsf/veritydisplay/47195fae666be225c12576b6003781bb/$File/2CSC400002D0208.pdf
(accessed 21 October 2010)
The indicated tripping values of electromagnetic tripping devices apply to a frequency range of 16 2/3…60 Hz. In the case of diverving frequencies or
direct current, see paragraph ''Variation of tripping threshold of MCBs according to network frequency'' (page 6/7)
`
The thermel releases are calibrated to a nominal reference ambient temperature; for Z and K, the value is 20C, for B and C = 30C. In the case of higher
ambient temperatures, the current values fail by ca. 6% for each 10 K temperature rise
´
As from operating temperature (after 1
n
[ 1 h or, as applicable, 2 h)
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