Page 217 - B_ELSB_Cat_2022_01_MCBs

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MCBs technical details
Particular supply sources and loads

Double tampoprinting of S 200 P Always according to IEC/EN 60898 standard, the ratio
The breaking capacity between the service short-circuit capacity (Ics) and the
For the modular circuit-breakers realized according to rated short-circuit capacity (Icn) – K factor – shall have
IEC/EN 60898 standard, the breaking capacity is expressed to be conforming to the enclosed table.
by the Icn quantity, indicated in Ampere, contained within
a rectangle on the front side of the device. The max value
of rated short-circuit capacity (Icn) considered by this
standard is 25000 A.

I cn K
< 6000 A 1
> 6000 A 0.75(*)
< 10000 A
>10000 A 0.5(**)

(*) Ics minimum value: 6000 A (**) Ics minimum value: 7500 A

Limiting class 3 according to the I2t values let though by the circuit-
The Manufacturer of the circuit-breaker has the right breaker for rated current up to 16 A and rated currents
to declare the energy limiting class of the device. According exceeding 16 A up to 32 A included, according to the table
to IEC/EN 60898 standard, the Manufacturer classifies the below.
circuit-breaker with a limiting class which ranges from 1 to

Rated current up to 16 A:
Short-circuit Limited energy classes
rated capacity
1 2 3
I t max (A s) I t max (A s) I t max (A s)
2
2
2
2
2
2
(A) B-C Type B Type C Type B Type C Type
3000 No 31000 37000 15000 18000
limits
4500 60000 75000 25000 30000
are
6000 specified 100000 120000 35000 42000
10000 240000 290000 70000 84000

Rated current exceeding 16 A up to 32 A included:
Short-circuit Limited energy classes
rated capacity
1 2 3
2
2
2
2
2
I t max (A s) I t max (A s) I t max (A s)
2
(A) B-C Type B Type C Type B Type C Type
3000 No 40000 50000 18000 22000
limits
4500 80000 100000 32000 39000
are
6000 specified 130000 160000 45000 55000
10000 310000 370000 90000 110000