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SKT - Surge Arresters
3-Electrode Ceramic Surge Arrester
■
COMMON DIMENSIONS
Electrical Characteristics
Type
DC
spark-over
voltage
(100V/s)
V
75±25%
90±25%
150±20%
+30
230
-40
Ⅱ
Ⅰ
350±20%
Ⅱ
SKT-3R-470A
SKT-3R-600A
470±20%
600±20%
I
Ⅱ
≤600
≤900
≤700
≤1200
/
100
/
100
5
5
80
≥10
10
<1
≤200
5
5
80
≥10
10
<1
≤200
≤500
≤800
/
100
5
5
80
≥10
10
<1
≤200
Ⅰ
Impulse
spark-over
voltage
(1KV/us)
V
≤600
≤600
≤700
≤800
Impulse
discharge
current
(10/1000us
300times)
A
50
50
100
100
5
5
80
Impulse
discharge
current
(8/20us
10times)
KA
5
5
5
AC
discharge
current
(50Hz 1s 5
times) A
5
5
5
Holdover
Voltage
V
Insulation
resistance
Ω
Capacitance
pF
Transverse
voltage
durationns
SKT-3R-75A
SKT-3R-90A
SKT-3R-105A
/
/
80
≥10
10
≥10
10
≥10
10
<1.5
<1.5
<1
≤200
≤200
≤200
SKT-3R-230A
≥10
10
<1
≤200
SKT-3R-350A
Note: Specification are subject to change without notice.
1