Determine the maximum secondary burden for a 1200/5, C400 CT, connected on the 1100/5 tap, that can be used to maintain the rated accuracy at 20 times rated symmetrical secondary current. Figure Q1(b) represents the typical excitation curve for multi-ratio C class CT.
Determine the maximum secondary burden for a 1200/5, C400 CT, connected on the 1100/5 tap, that can be used to maintain the rated accuracy at 20 times rated symmetrical secondary current. Figure Q1(b) represents the typical excitation curve for multi-ratio C class CT.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:10.000
CURRENT TURNS SECY
RATIO
Below the dashec ine he
exciting curent for a civen
votage for any unt ail ot
eceed the curve value
Above the dashed ine, the
voltaoe or a olven exciting
currert for any unit will not
be less than Nof the
arve value
500
RATIO RES
ohs
30oc
2000
100S
2005
201
40.1
G.05
C.10
0.15
0.20
0.25
by more than 2%
3005
4005
5005
6005
8005
0005
1000
1200
01
100 1
1201
1601
1001
200 1
2401
1000
0.41
0.46
0.01
300
20
130
0.001 0002 0 005 0.01 0.02 00 01 62
50 100
Secondary Exciting Current - I, - amps rms
Figure Q1(b)
Secondary Exciting Votage - V- volts ms
Transcribed Image Text:(b) Determine the maximum secondary burden for a 1200/5, C400 CT, connected
on the 1100/5 tap, that can be used to maintain the rated accuracy at 20 times
rated symmetrical secondary current. Figure Q1(b) represents the typical
excitation curve for multi-ratio C class CT.
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