Description
34/214 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • 861-9601.9
Integrated varistor
The integrated varistor limits overvoltages to approx. 500 V for
• protection devices (when inductive components are mounted in the vacuum circuit-
breaker)
• auxiliary voltages ≥ 60 V DC
17.3 Endurance classes
The switching devices of 8DA10 switchgear conform to the classes according to
IEC 62 271-100 and -102.
Overview
Circuit-breaker
Three-position
disconnector
Make-proof earthing
switch
NOTICE
Overvoltages in inductive circuits
Electrical control devices can be damaged by switching overvoltages.
➭ Do not switch off inductive consumers in DC circuits.
Panel type Circuit-breaker Disconnector Earthing switch
Circuit-breaker panel M2 M1
E2
1
1
By closing the circuit-breaker
E2
C2
Bus sectionalizer panel M2 M1
E2
1
E2
C2
Disconnector panel M1 E0
Function Class Standard Property
BREAKING M2 IEC 62271-100 10000 times mechanically
M2 (extended version) 30000 times mechanically with maintenance
E2 IEC 62271-100 10000 times rated normal current
50 times short-circuit breaking current
C2 IEC 62271-100 Very low probability of restrikes
Function Class Standard Property
DISCONNECTING M1 IEC 62271-102 2000 times mechanically
M1 (extended version) 3000 times mechanically
READY-TO-EARTH 1000 times mechanically
EARTHING
E2
1
1
By closing the circuit-breaker
IEC 62271-102 5 times rated short-circuit making current I
ma
Function Class Standard Property
EARTHING E1 IEC 62271-102 1000 times mechanically
2 times rated short-circuit making current I
ma
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