Technical data
12.5 Derating factors
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
159
12.5
Derating factors
The tables for derating factors apply for SENTRON VL used under difficult operating conditions in the
following areas:
Use at altitudes above 2000 meters
Table 12- 20 Derating factors for high altitudes
Circuit
breaker
Characteristic
values
Altitude (m)
2000
3000
4000
5000
6000
7000
8000
Switching capacity
I
CU
/I
CS
1,0
0,9
0,8
0,7
0,6
0,5
0,4
Operating voltage
V
max
1,0
0,9
0,8
0,7
0,6
0,5
0,4
Operating current
I
max
1)
1,00
0,96
0,92
0,88
0,84
0,80
0,76
All
Set current I
r
2)
1,00
1,02
1,04
1,06
1,08
1,10
1,12
1)
At max. ambient temperature 50 °C
2)
Thermomagnetic trip units only
Summary of Contents for SENTRON 3VL series
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Page 10: ...Table of contents 3VL molded case circuit breakers 10 System Manual 03 2009 110 0110 02 DS 01 ...
Page 350: ...Correction sheet 3VL molded case circuit breakers 350 System Manual 03 2009 110 0110 02 DS 01 ...
Page 358: ...Glossary 3VL molded case circuit breakers 358 System Manual 03 2009 110 0110 02 DS 01 ...
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