Technical data
12.5 Derating factors
3VL molded-case circuit breakers
166
System Manual, 03/2009, 110 0110 - 02 DS 01
Thermomagnetic overcurrent trip unit, setting values Ir (thermal)
Table 12- 27 Derating factors for low setting values
Circuit
breaker
At 0 °C
At 10 °C
At 20 °C
At 30 °C
At 40 °C
At 50 °C At 60 °C
At 70 °C
VL160X
0,80
0,84
0,88
0,92
0,96
1
1,04
1,08
VL160
0,80
0,84
0,88
0,92
0,96
1
1,04
1,08
VL250
0,80
0,84
0,88
0,92
0,96
1
1,04
1,08
VL400
0,80
0,84
0,88
0,92
0,96
1
1,04
1,08
VL630
0,80
0,84
0,88
0,92
0,96
1
1,04
1,08
Table 12- 28 Derating factors for high setting values
Circuit
breaker
At 0 °C
At 10 °C
At 20 °C
At 30 °C
At 40 °C
At 50 °C At 60 °C
At 70 °C
VL160X
0,65
0,72
0,79
0,86
0,93
1
1,07
1,14
VL160
0,65
0,72
0,79
0,86
0,93
1
1,07
1,14
VL250
0,65
0,72
0,79
0,86
0,93
1
1,07
1,14
VL400
0,65
0,72
0,79
0,86
0,93
1
1,07
1,14
VL630
0,65
0,72
0,79
0,86
0,93
1
1,07
1,14
Example for VL250:
●
I
n
= 250 A at 50 °C
●
Setting the thermal overcurrent trip unit: 250 A
●
Ambient temperature = 20 °C
●
Corrected setting = 250 x 0.87 = 217 A
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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