Date of test:July 9th 1994 number of poles:3 test
frequency(Hz):50
Test No.II2-572
Numbershowing-
thepicture
Test content
pole
peak value endurable
voltage (kA,peaks)
Endure electrical
current at a short time(kA)
short circuit time
last(kA)
Situation of the
tested
Stable
Stable
Stable
-01
940953
Moving-thermostable
A
77.5
32.9
4.1
Not craze or melt
B
43.5
31.4
C
80.3
33.5
Entrust test(94)-187B
Temperature rise test
report
Tested type
NHBT
Num.
Test current
1000A
Number of poles:3
Frequency of electric
current:50Hz
Meeting point
pressure
A:B: C: N
Wind speedŁ:weaker
than0.15m/s
Connect bus bar
Cuprum bus bar, x mm
x mm ,head length(m): tail length(m):
Data of temperature
rise(k)
Number of tested part
Naked bus bar
temperature rise(environmental temperature27.4oC)
Temperature rise with
the insulate sleeve( environmental temperature28.3oC)
Permitted
temperaturerise(k)
indication
A
B
C
A
B
C
1
32.2
25.0
50
2
48.1
29.7
70
3
34.6
30.3
50
4
36.4
29.6
50
5
49.8
32.2
70
6
33.7
29.3
50
7
35.5
25.2
50
8
55.6
29.2
70
9
35.2
27.5
50
Test
result
Up to
grade
date
July of
1994
Entrust test(94)-187C
1: Purpose of the test:See the insulate performances of NHBT
when shrink on the 10kv bus bar.
2: Way of test:Put NHBT on rectangular bus bar(80xx8x1200mm) and shrink it.
The average thickness is2.3mm. Do the experiment when the distance between
poles is 100mm, 90mm and 85m. Take the average value of 3times according to
GB<solid insulate material test>.
3:test result:
Distance between
poles(mm)
One minute industry
frequency test
Endure test of whole
wave thunder strike
Positive
cathode
Given voltage
(kv)
Voltag
- e
times
break-downti-mes
Given voltage(kv)
Voltage
times
break-downtim
es
Given voltage
(kv)
Voltage
times
Breakd
owntimes
100
42
1
0
75
15
0
75
15
0
90
42
1
0
75
15
0
75
15
0
85
42
1
0
75
15
0
75
15
0
Take the average of 3times of the test, it is 21.4kV/mm
P=96.3k Pa tdry=24.5oC
twet=22oC
Lab of Xi'an high voltage
electric implement graduate school
Test report
No.00426
Page 5
Endure test of high
voltage switch implement(working frequency)
