802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11
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Description
10.11 Endurance classes
The switching devices of NXPLUS C switchgear conform to the classes according to IEC 62271-
100, -102 and -103.
Overview
Circuit-breaker (standard)
Circuit-breaker up to 15 kV, 31.5 kA, 1250 A (option)
Three-position disconnector (standard)
Three-position disconnector up to 15 kV, 31.5 kA, 1250 A (option)
Panel type
Circuit-breaker
Disconnector
Switch-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
Vacuum contactor
panel
2
2
For the switching device "vacuum contactor", no classes have been defined in the standard.
M1
M1
E3
E2
Transformer panel
M0
M1
E3
E2
Ring-main panel
M1
M1
E3
E2
Metering panel
M1
M1
E3
E2
Function
Class
Standard
Property
BREAKING
M2
IEC 62271-100
10000 times mechanically without maintenance
E2
IEC 62271-100
• 10000 times rated normal current
• 50 times rated short-circuit breaking current without
maintenance
C2
IEC 62271-100
Very low probability of restrikes
Function
Class
Standard
Property
BREAKING
M2
IEC 62 271-100 30000 times mechanically with maintenance
E2
IEC 62 271-100 30000 times rated normal current
50 times rated short-circuit breaking current
C2
IEC 62 271-100 Very low probability of restrikes
Function
Class
Standard
Property
DISCONNECTING
M1
IEC 62271-102
2000 times mechanically
READY-TO-EARTH
M0
E0
IEC 62271-102
IEC 62271-102
1000 times mechanically
No making capacity
EARTHING
E2
1
1
The EARTHING function with class E2 is reached by closing the circuit-breaker in combination with
the three-position disconnector (class E0)
IEC 62721-200
IEC 62271-102
50 times rated short-circuit making current I
ma
Function
Class
Standard
Property
DISCONNECTING
M1
IEC 62271-102
5000 times mechanically
READY-TO-EARTH
M0
E0
IEC 62271-102
IEC 62271-102
5000 times mechanically
No making capacity
EARTHING
E2
1
1
The EARTHING function with class E2 is reached by closing the circuit-breaker in combination with
the three-position disconnector (class E0)
IEC 62721-200
IEC 62271-102
50 times rated short-circuit making current I
ma