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III. Model Description
Type of neutral pole of 4-pole circuit breaker
Note 2
Release mode and accessory code (see Table 1)
Number of poles
Note 1
Classification of operation characteristics when residual current
contains DC component: No code for default Type AC, and Code
A for Type A residual current protection device
Rated ultimate short-circuit breaking capacity level
(Type M: M; Type L: L)
Shell frame level rated current (A)
No code for the non-delay type, and Code Y for the delay type
Code B for alarm without tripping
With earth leakage (residual current) protection function
Design number
Molded Case Circuit Breaker
Enterprise code
Note: (1) 2P is denoted by 2; 3P is denoted by 3; and 3P+N and 4P are
denoted by 4.
(2) The type of neutral pole (N pole) of the 4-pole circuit breaker is divided
into:
Type A: The N pole is not equipped with an overcurrent tripping element and
is normally on, and is not closed/opened with the other three poles (Code:
A).
Type B: The N pole is not equipped with an overcurrent tripping element, and
is closed/opened with the other three poles (Code: B).
Where the Type A 4-pole circuit breaker is 3P+N type.
Where the shell frame level rated current of Inm
＝
400 A and 630 A is not
followed by L or M, and the outline dimensions and technical parameters are
the same as those of Type M.
Installation on
the left side
Installation on
the right side
Handle
Alarm contact
Auxiliary contact
Shunt trip
Undervoltage release
Lead direction
