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Digitrip 520i/520Mi
Long and short delay curves
Digitrip 520i/520Mi
Ground curve
Time in seconds
Current in multiples
of long delay setting I r
0.01
0.1
1
10
60
1000
7000
4000
0.5 1
50
20
2
10
100
Time in seconds
Current in multiples
of rating I n
0.01
0.1
1
10
60
1000
7000
4000
0.05 0.1
5
2
0.2
1
10
Protection and information … the digitrip family
provides choices like no other
Ever since introducing the first microprocessor-based
trip unit, Eaton has advanced the technology into a
more complete family of Digitrip RMS Electronic and
Programmable Trip Units designed and engineered
exclusively for Magnum breakers. Magnum can also be
supplied as a non-automatic switch.
Electronic trip units
•
Digitrip RMS 220 provides long time and
instantaneous protection only.
•
Digitrip RMS 520i enables the user as many as nine
phases and earth current protection settings for
maximum flexibility in trip-curve shaping and multi-
unit coordination, and adds earth fault current
protection settings.
•
Digitrip RMS 520Mi adds phase, neutral, and
Earth fault current metering … with a four-character
LCD display window.
•
Digitrip RMS 520MCi has the same features as the
520
Mi, but also includes communications.
Programmable trip units
Digitrip RMS 1150i provides programmability
for more sophisticated distribution systems
including:
•
Increased protection and coordination
capabilities.
•
Systems monitoring information including power
factor, voltage current, harmonic distortion,
values, and waveform capture with a three-line
(8
characters per line) LED display.
•
Two programmable contacts for customer use.
•
Time stamping of trip events for improved
troubleshooting and diagnostics.
•
Accuracy of 1% on metered values and 2% on
energy and power.
•
Systems diagnostic information.
•
INCOM and PowerNet communications.
•
Allows for custom curve shaping or selectable
IEC curves.
The trip unit family