Tap Rating; Amp Range; Contacts - GE IACS3A Instructions Manual

If t he t r ipping
s hould be u s e d,
doe s not pa s s t hr oug h t he conta cts o f the ta r g e t a n d s ea l-in c oils o f
the pr ote c ti ve r e la y .
C ONTACTS
The c ur r e n t -c lo s ing
vo l t a g e s n o t e xceeding
limite d by t he r a ting s of the s ea l- in unit.
Bur de n s f o r the t ime -ove r c u r r en t unit a r e g ive n in Table IX.
RANGE HZ
{AMPS)
0.5 - 0. 4 60 0.5
1.5 -12.0 60 1.5
60
2.0 -16. 0 2. 0
0.5 - 4.0 50 0.5
50
1. 5 -12.0 1. 5
2.0 -16.0 50 2.0
The impe da nce
NOTE:
t a p of
pic k-up
( a ppr oxima t e ly )
e xa mple ,
impe da nce
The impeda nce
( . 5/2 ) 2
GEK-34054
c u r r e n t e xceeds
t he conne c t ions being s uc h tha t t he t r ipping c u r r en t
r a t ing
2 50 volt s .
BURDENS
TABLE IX
BURDENS AT MIN.
MIN.
TAP PICKUP
z
R
0.40 3.90 4. 15
0.23 0.53 0.58
0.14 0. 30 0.33
1.16 3. 25 3.45
0.19 0. 44 0.48
0. 116 0.25 0.27
va lu e s
e a c h r e l ay.
c u r r e n t (TAP
a s the s qua r e o f
fo r a r e lay
of the 0 . 5 a mp
of the
4. 15 - 0 . 2 6 .
X
30 a mpe r e s ,
of t he conta c ts
The c u r r e n t-ca r r y ing
BURDENS IN
OHMS (Z}
TIMES PICKUP
3 10 20. 0
4.20 2.90 2. 20
0.58 0. 36 0.28
0.34 0.22
0. 15
3. 45 2. 41
1. 82
0.48 0. 298 0. 23
0.27
0. 180 0. 12
g iven a r e tho s e
The impe da nce f o r
R AT ING ) va r ie s
t he
with 0 . 5 - 4. 0
tap is g iven
2 . 0 a mp tap a t
8
a n a uxilia r y r e la y
3 0
is a mpe r e s
r a t in g
VA AT 5 AMPS
CALCULATED FROM
IMPEDANCE AT MIN.
PICKUP (I 2 Z)
104. 0
14. 5
8. 25
86. 25
12. 00
6. 75
f o r t he min imum
o t he r taps a t
i n ve r s e l y
t a p r a t ing.
Fo r
a mp r a ng e , t he
a s 4. 1 5 o hms .
2 . 0 a mpe r e s is
f o r
is