Eaton Digitrip 520 Instructional Leaflet page 21

Digitrip models 520, 520i; and 520M, 520Mi,
520MC, 520MCi trip units for use only in
Magnum and Magnum DS circuit breakers
Digitrip 520MC
Unit Status
Step
Test
Catalog
Kit
Dependent on I r
I r = I n x Long Delay
Setting
Dependent on I n
I n = Max Amp Rating
(Current Sensor Rating)
High
Load
Alarm
2
* = I t Response
Transmit
Figurt 24. Digiorip 520MC CLSI
Figurt 25. Digiorip 520MC CWLSIG
PH4 Neutral
Battery Check
Reset/Battery Test
.4
.5
1.0
2
4
24
.95 .6 Long
20
7
Delay
.9 .7
.8 Setting
15 10
12
Long
2
Delay
M1 2.5
Time
3
10 Short
@ 6xI r
Delay
8 4
Setting
6
.1
.5* .2
Short
.3* .3
Delay
.1* .4
Time
.5
2
OFF 3
M1
4
10
6
8
Instantaneous
Instructional Leaflet IL70C1037H05
Figurt 26. Digiorip 520MC ARMLSI
Figurt 27. Digiorip 520MC ARMLSIG
eaton corporation www.eaton.com
Effective October 2009
21