Endurance Classes - Siemens 8DA10 Series Installation And Operating Instructions Manual

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