Technical data

CA01305001Z-EN www.eaton.com
IZMX circuit-breakers, INX switch-disconnectors
IZMX circuit-breakers, INX switch-disconnectors
13
Communication capability
The communication-capability of Se-
ries NRX circuit-breakers open up
new possibilities in power distribution.
The trip unit provides all important op-
eration information and passes this on
via one of the various communication
adapter modules. This increases sys-
tem transparency and shortens the re-
sponse times to states such as
overcurrent, phase asymmetry and
overvoltage. A rapid intervention in a
process can, for example, prevent
downtimes and help to schedule main-
tenance activities and therefore boost
plant availability. Series NRX offers
interface modules to support protocols
such as Modbus RTU, Profibus, and
INCOM. In addition Eaton also offers a
direct connect Ethernet Communica-
tions module that provides web en-
abled monitoring and control of the trip
unit metering, logging, alarms, and
control functions using a standard
web browser.
Greater safety for maintenance
personnel with ARMS™
Personnel safety is of paramount im-
portance in today’s work environment.
Of recent concern is the potential for
serious injury due to exposure to elec-
trical arcs. Eaton’s Series NRX trip
units offer the patented ARMS system
(Arcflash Reduction Maintenance
System™), which offers a non-delayed
immediate disconnection is in the
event of an arc fault. This disconnec-
tion is even faster than that of a non-
delayed short-circuit release. This
function can be activated directly on
the circuit-breaker or via an external
switch, such as when maintenance
personnel enter a hazardous area.
Major Benefits of ARMS:
• Increased personnel safety – by lim-
iting the available arc flash energy
• Simple to operate
• Enabled with circuit breaker door
closed by a door mounted lockable
switch
• Enabled only for the time required to
perform the desired maintenance
work
• Preserves overcurrent coordination
under normal conditions
• Reduction in incident energy levels
may permit reduced levels of Per-
sonal Protective Equipment (PPE),
therefore improving worker comfort
and mobility
Other components of the ARCON arc
fault protection system, in conjunction
with Series NRX, enable an expansion
of arc fault protection in stages.
ARCON on the Internet:
www.moeller.net/arcon
Selection criteria for
circuit-breakers
Fundamental criteria for the selection
of circuit-breakers:
• Max short-circuit current I
k
max at
the circuit-breaker’ point of installa-
tion: this value determines the short-
circuit breaking capacity or the
short-circuit current carrying ca-
pacity of the circuit-breaker. It is
compared with the I
cu
, I
cs
and I
cw
values of the switch and essentially
determines its size (see technical
data).
• Rated operational current I
n
which
should flow through the respective
branch circuit: This value must not
be greater than the maximum switch
rated operational current of the cir-
cuit-breaker. The rated operational
current can be adjusted down using
additional rated operational current
modules.
• Ambient temperature of the circuit
breaker: This is generally the inter-
nal temperature in the control panel.
Observe the derating values with in-
creased ambient temperature (see
Technical data).
• Circuit-breaker type: fixed mounted
or withdrawable units, 3 or 4 pole.
• Minimum short-circuit current,
which flows through the switching
device: The release must recognize
this value as a short-circuit and may
react with a trip.
• Protection functions of the circuit
breaker: This is determined by the
selection of the respective overcur-
rent release.
For additional resources and tools for
selecting Eaton Air Circuit Breakers
please visit us as www.eaton.com/
seriesnrx.
IL Reference Listing
Description Frame Publication
Number
Description Frame Publication
Number
Description Frame Number Description Frame Number
IL for rating plug NF and RF 70C1592 IL for cassette extension rails RF IL01301047E
IL for drawout circuit breaker cassette rejection
interlocks
NF and RF IL01301006E IL for breaker and cassette interphase barriers RF IL01301048E
IL for auxiliary switch in right accessory tray NF IL01301007E IL for CES key lock NF IL01301049E
IL for UVR/ST/OTS in left accessory tray NF and RF IL01301008E IL for Castell key lock NF IL01301050E
IL for spring release, latch check switch and motor
operator
NF and RF IL01301010E IL for Digitrip 520 and 520M NF and RF IL01301051E
IL for operation counter NF IL01301011E IL for Ethernet communications adapter module NF and RF IL01301052E
IL for door escutcheon and gasket kit NF and RF IL01301012E IL for rear primary adapters RF IL01301053E
IL for drawout cassette IP20 safety shutters NF IL01301013E IL for cassette cell switch RF IL01301054E
IL for fixed breaker arc hood NF IL01301014E IL for operation counter RF IL01301055E
IL for fixed breaker primary adapters NF IL01301015E IL for front primary adapters RF IL01301056E
IL for drawout breaker primary adapters NF IL01301016E IL for auxiliary switch in right accessory tray RF IL01301057E
IL for drawout levering (racking) mechanism NF and RF IL01301018E IL for mechanical pop-out indicator and inter-
locked indicator
NF and RF IL01301058E
IL for mechanical pop-out indicator and inter-
locked indicator
NF IL01301019E IL for CES key lock RF IL01301059E
IL for breaker and cassette interphase barriers NF IL01301019E IL for Ronis key lock RF IL01301060E
IL for cassette extension rails NF IL01301025E IL for Castell key lock RF IL01301061E
IL for mounting feet NF IL01301030E IL for Kirk Key Lock RF IL01301062E
IL for source ground/zero sequence ground sen-
sor
NF and RF IL01301031E IL for 1150 trip unit NF and RF IL01301064E
IL for neutral current sensor NF IL01301032E IL for pushbutton cover kit RF IL01301065E
IL for INCOM communications adapter module NF and RF IL01301033E IL for handheld test kit NF and RF IL01301067E
IL for Modbus communications adapter module NF and RF IL01301034E IL for drawout circuit breaker 2-way cable inter-
lock kit
NF IL01301069E
IL for PROFIBUS communications adapter module NF and RF IL01301035E IL for drawout circuit breaker 3-way cable inter-
lock kit
NF IL01301070E
IL for surface mount NF IL01301036E IL for fixed circuit breaker 2-way cable interlock
kit
NF IL01301071E
IL for fixed and drawout breaker secondary termi-
nal blocks
NF and RF IL01301037E IL for fixed circuit breaker 3-way cable interlock
kit
NF IL01301072E
IL for IP55 cover NF and RF IL01301038E IL for cassette door interlock NF IL01301073E
IL for Kirk key lock NF IL01301039E IL for handheld test kit NF and RF IL5721B13
IL for ronis key lock NF IL01301040E IL for time delay undervoltage module NF and RF IL5721B33
IL for pushbutton cover kit NF IL01301041E Series NRX low voltage power (air) circuit break-
ers
NF MN01301001E
IL for cassette cell switch NF IL01301043E Series NRX low voltage power (air) circuit break-
ers
RF MN01301003E
IL for drawout cassette IP20 safety shutters RF IL01301044E IL for Lev-In key locks (Kirk, CES, Ronis, Castell) RF IL01301063E
IL for neutral current sensor RF IL01301046E IL for remote reset RF IL01301068E
Note For more information on Series NRX, please visit www.eaton.com/seriesnrx.