Cutler-Hammer Digitrip RMS 510, Инструкция по эксплуатации

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I.L. 29·8858
r-,
1""1
I
1
I
I
I cr-
Setting lnst.
I L
[Ij x In
:
®
(S)
I_ -
Available Settings
2, 2.5, 3, 4,
5, 6, M , , M ,
In Multiples of
Rating Plug
Amperes On)
M1
and
M2
Values are Specified on Rating Plug
Fig.
4.5
Instantaneous Current Settings
Note: For Testing Purposes Only: When using an
external single phase current source to test low level
ground fault current settings, it is advisable to use
the Auxiliary Power Module (APM) (See Fig. 7). Espe­
cially when the single phase current is low, without
the APM it may appear as if the trip unit does not
respond until the current is well above the set value,
leading the tester to believe there is an error in the
trip unit when there is none. The reason this occurs
is that the single phase test current is not a good
simulation of the normal three phase circuit. If three
phase current had been flowing, the trip unit would
actually have performed correctly. Use the APM for
correct trip unit performance whenever single phase
tests are made.
Available Settings
Gnd-Fault
�
Settin g
A ,
8,
C, D,
[]J x ln
E, F, H, K
e
Specific Values
Given on Ci rcuit
Breaker Time-Current
Curve and i n Table
1
Fig.
4.6
Ground Fault Current Settings
Effective May 1 997
Page 9
TABLE 1 - G ROUND FAULT CUR RENT SETTINGS
GROUND FAULT CURRENT SETTINGS
(AMPERES)CD
A B
c D
E F
H K
100
25 30 35
40 50 60
75 1 00
200
50 60 70
80 1 00 120
1 50 200
§ 250 63
75 BB
100 1 2 5 150
1 BB 250
300
75 90
105 120 150
1BO 225 300
Cii
LU
400
1 00 120 140
160 200
240 300 400
a:
LU
600
1 5 0 1BO 2 1 0
240 300 360
450 600
c..
630 1 5B 1B9
221 252
31 5 37B 473
630
:::!;
s
BOO 200 240
2BO 320 400
4BO 600 BOO
(!)
1 000
250 300 350
400 500
600 750 1 000
:::1
....J
1 200 300
360 420
480 600 720
900 1 200
c..
(!)
1 250 3 1 2
375 43B 500
625 750 93B
1 200
z
�
1 600 400 4BO
560 640 BOO
960 1 200 1 200
a:
2000
500 600 700
BOO 1 000 1 200
1 200 1 200
Cl
2400
600 720 B40
960 1200
1 200 1 200 1 200
LU
....J
1 200
1200
....J
2500 625
750 B75 1 000
1 200
1 200
�
3000/3 1 5 0
750 900
1 050 1 200 1 200
1 200 1 200 1 200
(/)
�
3200
BOO 960
1 1 20 1 200 1 200
1 200 1 200 1 200
4000
1 000 1200 1200
1 200 1 200 1 200
1 200 1200
5000 1 200
1200 1 200 1 200
1200 1 200 1 200
1 200
CD Tolerances on settings are ±1
0%
of values shown.
®
Refer to Type DS, type SPB or Series C R-Frame supplemental instruction
leaflets given in Section
9
for list of available rating plugs for each type circuit
breaker.
4.9 Ground Fault Time Delay Setting
As illustrated in Fig. 4.7, there are two different Ground
Fault curve shapes, i.e., fixed time (flat) or 12t response.
The shape selected depends on the type of selective
coordination chosen. The 12t response will provide a
longer time delay in the low-end of the ground fault cur­
rent range than will the flat response.
Five flat (.1 , .2, .3, .4, .5 sec.) and three 12t (.1*, .3*, .5*
sec.) response time delay settings are available. The 12t
response settings are identified by the suffix asterisk (*)
that appears in the setting viewing window. The 12t
response is applicable to currents less than 0.625 times
the ampere rating of the installed rating plug (In)· For cur-
rents greater than 0.625 x In the 12t response reverts to
the flat response.
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