FD3125 EATON CUTLER HAMMER, FD3125 Datasheet - Page 11

• Manufacturer Part Number: FD3125
• Description: CIRCUIT BREAKER, THERMAL MAG, 3P, 125A
• Manufacturer: EATON CUTLER HAMMER
• Series: Cr

Specifications of FD3125

• Actuator Style: Toggle
• No. Of Poles: 3
• Current Rating: 125A
• Voltage Rating Vdc: 250V
• Voltage Rating Vac: 600V
• Mounting Type: DIN Rail
• Terminals: Screw

November 2008
Multi-Function Electronic
Trip Units for All Applications
Digitrip RMS Trip Units
True rms Sensing
Digitrip RMS Trip Units utilize our
patented microprocessor-based intelli-
gence to provide true rms sensing,
permitting increased accuracy and
reliable system protection. True rms
sensing is not susceptible to nuisance
tripping when waveforms containing
high harmonic currents are present.
Digitrip RMS 310+
Digitrip RMS 310+ Electronic Trip Units
are available with Cutler-Hammer
Circuit Breakers JG and LG. They are
selectable long time delay (t LD ) and
pickup settings (I r ). A rating plug is not
required. The Digitrip 310+ offers true
rms sensing, is front adjustable and
has an optional local display of current
and cause of trip.
Rating Plugs
If rating plugs are needed for N- and
R-Frame, they are marked for 50/60 Hz
applications. Both fixed and adjustable
rating plugs are available, providing
further flexibility when applied to
selectively coordinated systems.
CA08101001E
Curve Shaping
When selectively coordinated systems
are called for, Digitrip RMS 310+ will
provide a cost-effective solution for a
variety of applications.
The standard Digitrip RMS 310+
includes an adjustable short time
pickup setting encompassing an I
ramp function which provides the
basic LS curve shaping function.
JG- and LG-Frames have an
adjustable long time delay.
JG- and LG-Frames have selectable
long time delay (t LD ) and pickup set-
tings (I r ). A rating plug is not required.
The optional Digitrip RMS 310+
provides additional flat response
short time delay adjustments on
an instantaneous setting to provide
LSI curve shaping capability.
Digitrip RMS 310+ Trip Units are
available with ground fault pickup
and flat response ground fault delay
which provides the trip unit with full
function LSG and LSIG curve shaping
flexibility.
Note: Contact factory for availability of
ground fault for LG-Frame trip unit.
Digitrip RMS 310+ Trip Units can effec-
tively coordinate with both sophisti-
cated upstream power breakers as
well as downstream thermal magnetic
breakers…making Digitrip RMS 310+
Trip Units the cost-effective reliable
choice for selectively coordinated
systems.
Thermal Memory
All Digitrip RMS Trip Units incorporate
a long delay. Thermal memory prevents
the system from cumulative overheating
due to repeated overcurrent events that
may occur in quick succession.
Field Testing
A field test kit is available for Digitrip
RMS 310+ trip units.
For more information visit: www.eaton.com
Series G Molded Case Circuit Breakers
15 – 2500 Amperes for UL, CSA & IEC Applications
Series G Electronic Trip Units
2
t
Digitrip RMS 610 and 910
Digitrip RMS 610 and 910 Trip Units
are available with Cutler-Hammer
R-Frame Circuit Breakers 800 through
2500 amperes. Digitrip 610 and 910
Trip Units provide unparalleled
system protection with the added
convenience of a local display.
Curve Shaping
Digitrip RMS 610 and 910 Trip
Units are available with up to nine
curve shaping choices achieved by
adjusting up to seven switches on the
front of the unit for optimum system
coordination. Maximum curve shaping
flexibility is provided by dependent
long and short delay adjustments that
are long delay pickup (I r ) based,
depicted on the front of the unit by the
blue portion of the time-current curve.
Additional coordination capability
can be provided by utilizing the short
delay and ground fault zone selective
interlocking features available on
these trip units.
RMS 610
RMS 910
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