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Porcelain Surge Arresters

Porcelain surge arresters are widely used in power systems for protecting equipment from transient voltage spikes or surges, such as those caused by lightning or switching operations. They are typically used in medium- and high-voltage applications.

Distribution type

porcelain-surge-arresters-img
Sl. No
System Voltage (kV)
Rated Voltage Ur (kV)
Nominal Discharge Current (kA)
MCOV (kV)
Designation As per IEC99-4 Ed3.0
LD Class as per IEC99-4 2009
Qrs(C.)
Qth (C.)
High Current 4/10µs KA
1
0.440
0.5
1.5
0.4
-
Distribution class
-
-
-
2
3.3
3
5
2.55
-
Distribution class
0.2
0.7
65
3
3.3
4.5
5
3.8
DM
Distribution class
0.2
0.7
65
4
6.6
6
5
5.0
DM
Distribution class
0.2
0.7
65
5
11
9
5
7.65
DM
Distribution class
0.2
0.7
65
6
11
9
10
7.65
DH
Class1
0.4
1.1
100
7
11
12
5
10.0
DM
Distribution class
0.2
0.7
65
8
11
12
10
10.0
DH
Class1
0.4
1.1
100
9
22
18
5
15.3
DM
Distribution class
0.2
0.7
65
10
22
18
10
15.3
DH
Class1
0.4
1.1
100
11
22
24
5
20.0
DM
Distribution class
0.2
0.7
65
12
22
24
10
20.0
DH
Class1
0.4
1.1
100
13
33
30
5
25.0
DM
Distribution class
0.2
0.7
65
14
33
30
10
25.0
DH
Class1
0.4
1.1
100
15
33
36
5
30.0
DM
Distribution class
0.2
0.7
65
16
33
36
10
30.0
DH
Class1
0.4
1.1
100

Other parameters

  • Maximum Lightning Impulse Residual Voltage at Nominal Discharge current(8/20µs) for Arrester with rated voltage 0.5kV to 36kV shall 3.6*Rated Voltage
  • Partial Discharge at 1.05 *MCOV : <10pC
  • Frequency :50 Hz
  • Reference Voltage shall be greater than Rated Voltage.
  • Creepage Distance 25mm/kV, 31mm/kV or as applicable.
  • Reference Standard : IEC60099-4 and IS15086-4.

Station type

station-type
Sl. No.
System Voltage (kV)
Rated Voltage Ur (kV)
Nominal Discharge Current (kA)
MCOV (kV)
Designation as per IEC 99-4 Ed3.0
LD Class as per IEC 99-4 : 2009
Qrs (C)
Wth (C)
1
6.6
6
10
5.0
DH
Class 1
0.4
-
2
6.6
6
10
5.0
SL
Class 2
1
4
3
6.6
6
10
5.0
SM
Class 3
1.6
7
4
11
9
10
7.65
DH
Class 1
0.4
-
5
11
9
10
7.65
SL
Class 2
1
4
6
11
9
10
7.65
SM
Class 3
1.6
7
7
11
1
10
10.0
DH
Class 1
0.4
-
8
11
1
10
10.0
SL
Class 2
1
4
9
11
1
10
10.0
SM
Class 3
1.6
7
10
15
15
10
12.75
DH
Class 1
0.4
-
11
15
15
10
12.75
SL
Class 2
1
4
12
15
15
10
12.75
SM
Class 3
1.6
7
13
22
18
10
15.3
DH
Class 1
0.4
-
14
22
18
10
15.3
SL
Class 2
1
4
15
22
18
10
15.3
SM
Class 3
1.6
7
16
22
24
10
20.0
DH
Class 1
0.4
-
17
22
24
10
20.0
SL
Class 2
1
4
18
22
24
10
20.0
SM
Class 3
1.6
7
19
33
30
10
25.0
DH
Class 1
0.4
-
20
33
30
10
25.0
SL
Class 2
1
4
21
33
30
10
25.0
SM
Class 3
1.6
7
22
33
36
10
30.0
DH
Class 1
0.4
-
23
33
36
10
30.0
SL
Class 2
1
4
24
33
36
10
30.0
SM
Class 3
1.6
7
25
33
42
10
35.0
SL
Class 2
1
4
26
33
42
10
35.0
SM
Class 3
1.6
7
27
66
60
10
51.0
SL
Class 2
1
4
28
66
60
10
51.0
SM
Class 3
1.6
7
29
66
72
10
61.0
SL
Class 2
1
4
30
66
72
10
61.0
SM
Class 3
1.6
7
31
110
96
10
81.0
SM
Class 3
1.6
7
32
132
120
10
112.0
SM
Class 3
1.6
7
33
220
198
10
168.0
SM
Class 3
1.6
7
34
220
216
10
183.0
SM
Class 3
1.6
7

Other parameters

  • Maximum Lightning Impulse Residual Voltage at Nominal Discharge current(8/20µs) for Arrester with rated voltage 6kV to 36kV shall 3.3*Rated Voltage.
  • High Current Impulse Withstand Value (4/10µs) : 100kA
  • Partial Discharge at 1.05 *MCOV : <10pC
  • Frequency :50 Hz
  • Reference Voltage shall be greater than Rated Voltage.
  • Creepage Distance 25mm/kV, 31mm/kV or as applicable.
  • Reference Standard : IEC60099-4 and IS15086-4.