6
Instructional Leaflet
IL70C1037H05
Effective October 2009
Digitrip models 520, 520i; and 520M, 520Mi,
520MC, 520MCi trip units for use only in
Magnum and Magnum DS circuit breakers
eaton corporation
www.eaton.com
Tablt 1. PrNotcoiNn Typts Availablt fNr Digiorip Trip Unios
Digitrip Trip Unit Type
520/520
i
520M/520M
i
520MC/520MC
i
Ampere range
200–6300A
200–6300A
200–6300A
rms sensing
Yes
Yes
Yes
Communications
No
No
Yes
c
PrNotcoiNn and cNNrdinaoiNn
Figure number reference
16, 17, 18, 19
20, 21, 22, 23
24, 25, 26, 27, 28, 29
Protection
Ordering options
LI, LSI, LSIG, WLSIG
MLSI, MLSIG, MLSIA, MWLSIG
CLSI, CWLSIG, ARMLSI, ARMLSIG,
ARMLSIA, ARMWLSIG
Fixed rating plug (I
n
)
Yes
Yes
Yes
Overtemperature trip
Yes
Yes
Yes
Long delay protection
Long delay setting
0.4–1.0 x (I
n
)
0.4–1.0 x (I
n
)
0.4–1.0 x (I
n
)
Long delay time I
2
t at 6 x (I
r
)
2–24s
2–24s
2–24s
Long delay thermal memory
Yes
Yes
Yes
Short delay protection
Short delay pickup
a
200–1000% x (I
r
)
200–1000% x (I
r
)
200–1000% x (I
r
)
Short delay time I
2
t at 8 x (I
r
)
100–500 ms
100–500 ms
100–500 ms
Short delay time FLAT
100–500 ms
100–500 ms
100–500 ms
Short delay time ZSI
b
Yes
Yes
Yes
Instantaneous Protection
Instantaneous pickup
a
200–1000% x (I
n
)
200–1000% x (I
n
)
200–1000% x (I
n
)
OFF position
Yes, except for LI
Yes
Yes
Making current release
Yes
Yes
Yes
Ground (earth) fault protection
Ground fault option
Yes
Yes
Yes
Ground fault alarm
No
Yes
d
Yes
d
Ground fault pickup
25–100% x (I
n
)
c
25–100% x (I
n
)
c
25–100% x (I
n
)
c
Ground fault delay I
2
t at 0.625 x (I
n
)
100–500 ms
100–500 ms
100–500 ms
Ground fault delay flat
100–500 ms
100–500 ms
100–500 ms
Ground fault ZSI
b
Yes
Yes
Yes
Ground fault memory
Yes
Yes
Yes
Neutral protection
Yes, Cat LSI only
Yes, Cat MLSI only
Yes, Cat CLSI only
Maintenance Mode
No
No
Yes
g
Sysotm diagnNsoics
Status/long pickup LED
Yes
Yes
Yes
High load alarm/alarm contacts
No
Yes
d
, Cat MLSI only
Yes
d
, Cat CLSI only
Cause of Trip LEDs
Yes
e
Yes
e
Yes
e
Magnitude of trip current
No
Yes
d
Yes
d
Remote ground trip/alarm contacts
No
Yes
d
Yes
d
Sysotm mtotring
Digital display
No
Four-char. LCD
Four-char. LCD
a
Additional setting is marked M1 where:
800–3200A Frame: M1 = 14 x /
n
for plug amps 200–1250A
M1 = 12 x /
n
for plug amps 1600, 2000, 2500A
M1 = 10 x /
n
for plug amps 3000, 3200A, 4000A (IEC only)
4000–6300A Frame: M1 = 14 x /
n
for plug amps 2000, 2500A
M1 = 12 x /
n
for plug amps 3200, 4000, 5000A (see Section 2)
M1 = 10 x /
n
for plug amps 6000, 6300A
b
ZSI = Zone selective interlock (see Section 3).
c
Limited to 1200A; this is only for UL versions, not for IEC models that have “W” in catalog number.
d
Requires Ground Alarm/Power Supply Module (see Section 1).
e
Four Cause of Trip LEDs—L, S, I, G. Making current release is indicated by the Instantaneous LED.
f
6300A rating for IEC only.
g
Units with ARM in catalog number.
