Eaton Magnum Air MWN-408 User Manual page 25

1
Figure 3-16: Pictorial Diagram of Typical Current Sensing, Processing and Tripping System
1. Toroidal Current Sensor
2. Rating Plug
3. Trip Unit
4. Trip Actuator
5. Typical Magnum Circuit Breaker
6. Sensors
Note: Alternate ground locations may be required to
meet installation requirements.
Models 220 and 520 are plug compatible and
interchangeable in the field. Circuit breakers with these
trip units can be upgraded to Models 520M and/or
520MC in the field; however additional wiring (for power
supply and communications) may be required to take full
advantage of the additional features. Contact Eaton for
upgrading to Models 1150/1150i.
All the electronic trip units are self-powered with regard
to their protective functions. Current signal levels and the
tripping energy are derived from the current sensors
integrally mounted in the circuit breaker. Control power is
required to operate certain optional display and metering
functions.
1812.900A
5
6
2
3
Table 3-1: Magnum-Digitrip Trip Units
Functions 220
1
LSIG Protection Yes
Disable (I) No
GF Protection No
GF Alarm No
Display No
Programmable No
Metering No
Power and No
Energy Values
Power Quality No
Communication No
1
Long and Instantaneous only.
2
One-line, (four characters per line) LCD display.
3
Three-line, (eight characters per line) LEDdisplay.
4
Phase, neutral, ground, and high load current only.
5
Available control voltages are 24/48Vdc, 120Vac and
240Vac.
6
Models 520, 520M, 520MC and 1150 also available
with a maximum ground fault current setting of
1200A.
Magnum
4
6 5+6 5+6
520i 520Mi 520MC
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
No Yes Yes
2 2
No Yes Yes
No No No
4 4
No Yes Yes
No No No
No No No
No No Yes
5+6
1150i
Yes
Yes
Yes
Yes
3
Yes
Yes
Yes
Yes
Yes
Yes
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