Siemens NXAIR Operating Instructions Manual page 91

The coding symbols characterize the functional properties of a panel version. The leftmost symbol (3)
characterizes the functional properties as regards electromagnetic interlocks.
A second symbol or a combination of two further symbols (4; 5) characterizes the panel version as regards
its current ratings.
In the case of circuit-breaker panels, the second symbol or the combination of two further symbols
characterizes the panel version additionally as regards its specific control functions. Circuit-breaker panels
with basic control functions are equipped with 1 shunt release and no other releases. Basic control functions
are coded by one symbol only. Circuit-breaker panels with extended control functions are equipped with a
second release (a second shunt release / a Ct release / an undervoltage release). Extended control
functions are coded by a combination of two symbols.
Position
Panel type
(left to right)
st
1 symbol (3) All types
nd
2 symbol (4) Circuit-breaker Rated current and
Other than
circuit-breaker
rd
3 symbol Circuit-breaker Rated current and
(5; optional)
Other than
circuit-breaker
110-0134.9 / 14
Function coded
Electromagnetic
interlock
basic control
functions
Rated current
Examples:
extended control
functions
For single use of symbols or for use in combinations
of symbols
Rated current
NXAIR / ≤ 40 kA
Operating the circuit-breaker panel
Symbols
Without electromagnetic interlock
With electromagnetic interlock:
•
For racking mechanism of switching-
device truck
•
For operating mechanism of
feeder earthing switch
With electromagnetic interlock:
For racking mechanism of switching-device
truck
With electromagnetic interlock:
For operating mechanism of
feeder earthing switch
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