No Instantaneous Current Setting; Ground Fault Current Setting; Ground Fault Time Delay Setting; Table 4. Ground Fault Current Settings - Eaton Digitrip RMS 610 Instruction Leaflet

Instructions for Digitrip RMS 610 Trip Unit

3.7 No Instantaneous Current Setting

For types LS and LSG Trip Units, please see Sections 1 .1 .3
DlScriminator (High initial Current Release) and 1 .1 .4 OVERRIDE
(Fixed Instantaneous), for available fast-acting high short-circuit pro-
tection .

3.8 Ground Fault Current Setting

The eight (8) Ground Fault "Pick-up" Current Settings are labeled
with the code letters "A" through "K" (except there are no "G" or "I"
settings), as illustrated in Figure 17 . In general, the specific current
settings range from 0 .25 to 1 .0 times (I
cannot exceed 1200 A . The specific Ground Current Settings for
each letter are listed in Table 4 and on the (G) Time-Current Curve
applicable for the circuit breaker (see Section 5) .
For Testing Purposes Only: When using an external single phase current
N otee:
source to test low level ground fault current settings, it is advisable to use the
Auxiliary Power Module (APM) (see Section 1 .5 and Figure 11) .
Figure 17. Ground Fault Current Settings.

Table 4. Ground Fault Current Settings.

Ground Fault current Settings
(amperes)
a B
100 25 30
200 50 60
250 63 75
300 75 90
400 100 120
600 150 180
630 158 189
800 200 240
1000 250 300
1200 300 360
1250 312 375
1600 400 480
2000 500 600
2400 600 720
2500 625 750
3000/3150 750 900
3200 800 960
4000 1000 1200
5000 1200 1200
 Tolerances on settings are ± 10% of values shown.
 Refer to Type DS, Type SPB, or Series C R-Frame supplemental instruction leaflets
given in Section 5 for list of available rating plugs for each type circuit breaker.
), the rating plug value, but
n
Available Settings
A.
Specific Values
Given o n Circuit
Breaker time-Current
Curve and in Table 1

c D e F H
35 40 50 60 75
70 80 100 120 150
88 100 125 150 188
105 120 150 180 225
140 160 200 240 300
210 240 300 360 450
221 252 315 378 473
280 320 400 480 600
350 400 500 600 750
420 480 600 720 900
438 500 625 750 938
560 640 800 960 1200
700 800 1000 1200 1200
840 960 1200 1200 1200
875 1000 1200 1200 1200
1050 1200 1200 1200 1200
1120 1200 1200 1200 1200
1200 1200 1200 1200 1200
1200 1200 1200 1200 1200

3.9 Ground Fault Time Delay Setting

As illustrated in Figure 18, there are two different Ground Fault
curve shapes, i .e ., fixed time (flat) and I
selected depends on the type of selective coordination chosen . The
I t response will provide a longer time delay in the low-end of the
2
ground fault current range than will the flat response .
Five flat ( .1, .2, .3, .4, .5 sec .) and three I
response time delay settings are available . The I
are identified by the suffix asterisk (*) that appears in the setting
viewing window . The I
0 .625 x I , (the I value is marked on the installed rating plug) . For
n n
currents greater than 0 .625 x I
response .
N otee: See also Section 1 .1 .5 on Zone Interlocking .
In addition to the standard Ground Fault protection, the Digitrip RMS
N otee:
610 Trip Unit also has a GROUND TIME MEMORY (GTM) function, which
serves to protect loads in the event of a sputtering arc to ground . Without
the GTM function, the Trip Unit would normally reset each time the arc sput-
tered, and begin to time-out all over again, so that a sputtering fault may not
have been detected . But with the GTM function, the Trip Unit "remembers"
the sputtering ground current for up to five (5) times the Ground Fault Time
Setting . After that time, it does reset automatically . The GTM function does
reset rather quickly; on the 0 .1 second setting, for example, it will reset in
0 .5 second .
K
100
200
250
300
400
600
630
800
1000
1200
1200
1200
1200
1200
1200
"*" In Viewing Window
Indicates
1200
2
I t Shape
1200
Figure 18. Ground Fault Time Delay Settings.
1200
1200
eaton corporation www.eaton.com
Instruction Leaflet I. L. 29-886B
Effective August 2011
2 t response . The shape
t ( .1*, .3*, .5* sec .)
2
t response settings
2
2 t response is applicable to currents less than
, the I t response reverts to the flat
2
n
Gnd. Fault
Time
.3 Sec.
I
Available Settings
.1, .2, .3, .4, .5
. - - - - - - - -
Seconds w i t h
I I
.
Flat Response
.
,
2
I t Shape
Returns to Flat
Responses at
Approximately
0.625
.1*, .3*, .5*
Seconds W i t h
2
I t Shape
I
n
17