Siemens NXAIR M Operating Instructions Manual page 66

Operating the circuit-breaker panel
Position
Panel type
(left to right)
st
1 symbol (3) All types
nd
2 symbol (4) Circuit-
breaker
Other than
circuit-breaker
rd
3 symbol Circuit-
(5; optional) breaker
Other than
circuit-breaker
Verifying correspondence of withdrawable part version and panel version
A withdrawable part may only be inserted in a panel if the coding symbols are identical in number and kind
with those on the low-voltage connector.
Carefully compare the coding symbols on the top side of the withdrawable part (1) with the
symbols on the top side of the low-voltage connector (2).
Fig. 106: Verifying correspondence of coding symbols on
66
Function coded
Electromagnetic
interlock
Rated current and
basic control
functions
Rated current
Rated current and
extended control
functions
Rated current
withdrawable part and low-voltage connector and (example)
NXAIR M
Symbols
Without electromagnetic interlock
With electromagnetic interlock:

For racking mechanism of withdrawable
part

For operating mechanism of
feeder earthing switch
With electromagnetic interlock:
For racking mechanism of withdrawable part
With electromagnetic interlock:
For operating mechanism of
feeder earthing switch
Examples:
For single use of symbols or for use in combinations
of symbols
1
2
139-2021.9 / 07