Eaton 520 User Manual

30
Operating Manual for Series NRX
Trip Units - Digitrip™ 520/520M
EATON www.eaton.com
Instruction Leaet IL01301051E
effective September 2013
Symptom Probable Cause Possible Solution(s) References
Circuit breaker tripping and orange
LED (not red) illuminated above
SHORT text or above alarm text (LI
style)
Circuit breaker MCR (b) auxiliary switch not
indicating proper state
Check MCR (b) switch Refer to Appendix E or F master
connection diagram
Circuit breaker mechanism not closing properly Check with factory Refer to Section 2 for diagnostics
Maintenance Mode
will not shut off
Verify remote switch or
local switch is not on
Maintenance mode was
initially enabled by
communication and is not
available
Restore communication link if possible and
check for possible wiring errors.
Appendix C: Specications
Protection Trip Pickup Trip Time Trip Pickup Tolerance Trip Time Tolerance
LONG
I
2
t
I
R
= 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 0.95, 1.0 x I
n
2, 4 ,7, 10, 12, 15, 20, 24 at 6 x I
R
110% ±10% x I
R
+ 0, –30%
SHORT
FLAT
2, 3, 4, 5, 6, 7, 8, 10 x I
R
0.1, 0.2, 0.3, 0.4, 0.5 ±10% Per curve
SHORT
I
2
t
2, 3, 4, 5, 6, 7, 8, 10 x I
R
0.1*, 0.3*,0.5* at 8 x I
R
±10% Per curve
INST 2, 3, 4, 6, 8, 10, 12, OFF x I
n
OFF N/A on LI style
≤ 50 ms ±10% Per curve
GROUND
FLAT
0.25, 0.3, 0.35, 0.4, .05, 0.6, 0.75, 1 x I
n
0.1, 0.2, 0.3, 0.4, 0.5 ±10% Per curve
GROUND
I
2
t
0.25, 0.3, 0.35, 0.4, .05, 0.6, 0.75, 1 x I
n
0.1*, 0.3*, 0.5* at 0.625 x I
n
±10% Per curve
MCR Automatically defined by the breaker type ≤ 30 ms
HIGH INST Automatically defined by
breaker type
≤ 30 ms
Frequency 50, 60 Hz
Temperature range of circuit breaker -20°C to 55°C
Temperature trip of PC board 85°C
Relative humidity (noncondensing) 0 to 85%
Metering accuracy +- 3% x NF Max Frame Rating (1600A), +-4% RF Max Frame Rating (4000A)
Control voltage consumption 6 watts
Control voltage (if desired for Digitrip 520M
alarm relays)
24 Vdc ±10%
Alarm Relays (Resistive Load)
AC 0.5A @ 230 Vac
AC 1A @ 120 Vac
DC 1A @ 48 Vdc
DC 0.35A @ 125 Vdc

Eaton 520 Specifications

General

Brand	Eaton
Model	520
Category	Other
Language	English