Surge Arresters
Your partner in energy solutions
Features of the CG Sales Networks surge arresters
Background & Development
Quality Assurance & Standards
Surge arresters are used to protect power system installations and equipment
against voltage surges caused by lightning, switching operations and abnormal
service conditions. Generally arresters are connected in parallel with the equipment
to be protected, typically between phase and ground.
We follow stringent quality assurance guidelines & procedures. Arresters are
subjected to numerous quality tests & controls to ensure high reliability & ongoing
customer satisfaction.
Quality assurance is performed in three stages: 1. Measurement of ZnO characteristics through a fully automated test facility. 2. Measurement of material quality and
dimensional accuracy. 3. Full assembly and testing for the measurement of performance characteristics such as leakage current, reference voltage and partial discharge.
Our quality reputation extends throughout our entire product line and beyond to the
customer site where the product is installed.
Metal oxide arresters, without spark gaps, consist of an active element which is a
highly non-linear ceramic resistor essentially composed of Zinc Oxide. Fine Zinc
Oxide crystals are surrounded by other metal oxides (additives).
It is well-known that an effective surge protection device must demonstrate the
following characteristics:
> Extremely non-linear Voltage-Current characteristic that enables them to operate
only under transient conditions
> Low power loss under normal operating conditions
> Sufficient energy-handling capability
> High reliability and long life
> Robust design and construction
Our Zinc Oxide surge arresters meet all of these requirements. We have a modern
plant for the manufacture of Zinc Oxide arresters based on technical know-how from
Hitachi Ltd., Japan. We have not only been able to master this technology but are
also embarking on new fields of applications.
We manufacture various ZnO element sizes. These provide surge arresters with
different energy handling capabilities.
All surge arresters in this catalog are designed and tested in line with the ANSI-IEEE
C62.11 and/or IEC 60099-4 standards to fit the customer’s need. Additional tests at
-50C are performed to meet the temperature requirements for the Canadian market.
Testing
Our ZnO elements and arresters undergo stringent quality assurance and test
procedures at every stage. CGL has a fully automated test facility. This also includes
an acceptance and conformance facility as stipulated by the ANSI-IEEE, CSA or IEC
standards for specific applications. The test facility is capable of testing elements for
energy handling, lightning current performance, AC & DC characteristics and power
loss.
For standard acceptance tests, the plant has comprehensive facilities to test completely assembled arrester units in a specially designed Faraday Cage.
Each complete arrester unit must pass electrical tests for reference voltage, residual
voltage & partial discharge. These tests are in addition to the 100% production
testing performed on the metal oxide valve elements. Each arrester is also subjected
to a leak test to ensure the integrity of the sealing system.
All of our Surge Arresters conform to the requirements of international quality
standards while our quality and environmental management systems are certified to
ISO 9001:2000 and ISO 14001 respectively.
Maintenance & Service by CG Sales Networks
The products are self contained, maintenance free and require no spares over their
entire life span. We recommend regular and periodic checks in accordance with
pre-specified schedules (indicated in the instruction manuals supplied with the
arresters).
We provide solutions to all of your technical requirements through our highly qualified engineers, who have extensive experience in the field. The service engineers
and technicians from the CG Services Division can provide support for erection and
on-site commissioning.
ZnO Porcelain Housed Surge Arresters
For nominal system voltages up to 400 kV
Range of ZnO Porcelain housed Surge Arresters
CG Power Systems offers the entire range of arresters (nominal system voltage
up to 400 kV). These possess superior functional characteristics and high energy
handling capabilities ranging from distribution class to station class (up to 13.0 kJ/
kV MCOV).
Design and Construction
> Simple, robust and maintenance free construction
> Positive locking of Zinc Oxide elements prevent block
displacement during shipping
> ZnO elements with extremely non-linear V-I characteristics
offer high protective margins
> Low power loss under normal system voltages resulting
in enhanced performance at elevated temperatures
> Controlled environment assembly line
> Ultra stable elements resulting in enhanced overvoltage
protection capacity
> Shatter resistant pressure relief performance
> Unique doughnut construction of ZnO elements offer
high-energy capability, provide uniform density & temperature distribution
> Single stack design up to 144kV Duty Cycle Voltage, double
stack design up to 240kV Duty Cycle Voltage
> Available in ANSI- Grey or Brown Porcelains
Performance
The ZLA3 arrester has the following general properties:
>
>
>
>
>
TOV capability for 1 second: 1.37
Energy Absorption Capability: 8.7 kJ / kV MCOV
Pressure Relief Capability: 65 kA rms sym.
Working cantilever strength: 70,000 lb-in
We are able to customize the surge arresters in such way to meet
any MCOV and TOV and energy capability requirement. Please contact
your nearest company representative for solutions to your special needs.
Energy absorption capabilities up to 13 kJ / kV MCOV is also available.
Electrical and Physical Characteristics
Catalog No
Duty Cycle
Voltage
Switching
Steep Current
Current
MCOV
Min.
Reference
Fig below
Discharge Voltage (8/20S) (kV)
At 1.5kA
At 3.0kA
At 5.0kA
At 10kA
At 20kA
At 40kA
Discharge
Voltage
Discharge
Voltage
Leakage
1000A (kV)
10kA (kV)
In/mm
A
Approx.
Net Wt
In/mm
Lb
(kV)
(kV)
ZLA3003
3
2.55
6.4
6.9
7.2
7.8
8.6
9.4
6.2
9.2
15/375
3
20.3/505
57/26
ZLA3005
6
5.1
12.7
13.7
14.3
15.5
17.1
18.7
12.4
18.2
15/375
3
20.3/505
60/27
ZLA3007
9
7.65
19.2
20.7
21.6
23.4
25.8
28.2
18.7
27.5
15/375
3
20.3/505
62/28
ZLA3008
10
8.4
21.2
22.8
23.8
25.8
28.4
31.1
20.6
30.4
15/375
3
20.3/505
64/29
ZLA3010
12
10.2
25.4
27.4
28.6
31
34.2
37.4
24.8
36.5
15/375
3
20.3/505
66/30
ZLA3013
15
12.7
32
34.5
36
39
43
47
31.2
45.9
15/375
3
20.3/505
71/32
ZLA3015
18
15.3
38.7
41.8
43.6
47.2
52
56.9
37.7
55.6
25.6/640
3
24.2/605
84/38
ZLA3017
21
17
42.7
46
48
52
57.3
62.7
41.6
61.2
25.6/640
3
24.2/605
88/40
ZLA3019
24
19.5
51.1
55.1
57.5
62.3
68.7
75.1
49.8
73.3
25.6/640
3
24.2/605
93/42
ZLA3022
27
22
58.3
62.8
65.5
71
78.3
85.6
56.7
83.6
38.6/965
3
28.5/710
106/48
ZLA3024
30
24.4
63.2
68.1
71.1
77
84.9
93
61.5
90.6
38.6/965
3
28.5/710
110/50
ZLA3029
36
29
74.7
80.5
84
91
100
110
72.7
107
38.6/965
3
28.5/710
115/52
ZLA3031
39
31.5
81.2
87.6
91.4
99
109
119
79.1
117
45.3/1130
3
31.1/775
123/56
ZLA3036
45
36.5
94.5
102
106
115
127
139
92.1
136
45.3/1130
3
31.1/775
132/60
ZLA3039
48
39
99
107
112
121
133
146
96.7
142
45.3/1130
3
31.1/775
141/64
ZLA3042
54
42
112
120
126
136
150
164
109
160
71.5/1785
3
38.8/970
146/66
ZLA3048
60
48
128
138
144
156
172
188
125
184
71.5/1785
3
38.8/970
154/70
ZLA3057
72
57
150
162
169
183
202
221
146
215
71.5/1785
3
38.8/970
163/74
ZLA3070
90
70
189
203
212
230
254
277
184
271
102/2550
3
52.2/1305
203/92
ZLA3076
96
76
197
212
222
240
265
289
192
282
102/2550
3
52.2/1305
209/95
ZLA3084
108
84
223
241
251
272
300
328
217
320
150/3750
3
62.4/1560
254/115
ZLA3098
120
98
246
265
277
300
331
362
240
353
150/3750
3
62.4/1560
265/120
ZLA3106
132
106
271
292
305
330
364
398
264
388
150/3750
3
62.4/1560
276/125
ZLA3115
144
115
295
318
332
360
397
434
288
424
173/4325
3
62.4/1560
287/130
ZLA3131
168
131
342
369
385
417
460
503
333
491
174/4350
2
87.4/2185
375/170
ZLA3140
172
140
350
377
393
426
470
513
340
501
205/5125
2
101/2520
397/180
ZLA3144
180
144
366
395
412
446
492
537
356
525
205/5125
2
101/2520
406/185
ZLA3152
192
152
390
420
438
475
524
572
380
559
221/5525
2
97.6/2440
428/195
ZLA3180
228
180
461
497
519
562
620
677
449
662
252/6300
2
111/2775
518/235
ZLA3190
240
190
484
522
545
590
651
711
472
694
252/6300
2
111/2775
529/240
ZLA3209
258
209
521
562
586
635
700
765
508
747
276/6900
1
136/3400
575/261
ZLA3212
264
212
533
575
600
650
717
783
520
765
276/6900
1
136/3400
582/265
ZLA3220
276
220
556
600
626
678
748
817
542
798
371/9275
1
156/3910
661/300
ZLA3230
288
230
579
625
652
706
778
851
564
831
371/9275
1
156/3910
670/305
ZLA3235
294
235
592
639
666
722
796
870
577
850
371/9275
1
156/3910
675/307
ZLA3245
312
245
629
678
707
766
845
923
612
902
371/9275
1
1563910
692/315
ZLA3318
396
318
794
856
894
968
1067
1167
774
1139
449/11225
1
180/4500
827/376
ZLA3335
420
335
843
909
949
1028
1133
1239
822
1210
520/13000
1
180/4500
860/391
CG Arresters can be customized to meet virtually all your duty cycle voltage & MCOV requirements.
Please contact your nearest sales representative for solutions to your special needs.
Electrical and Physical Characteristics
Line terminal option 1
Fig 1
Fig 2
Fig 3
Line terminal standard
‘A’ : Overall Height
Standard us 10” bolt circle mounting available
Ground terminal standard
Line terminal option 2
The above table summarizes the electrical and mechanical properties of the ZLA
3 surge arresters. As a standard we offer each surge arresters with the NEMA
four hole line and ground terminal and the standard US 10” bolt circle mounting
arrangement. Optional line terminal arrangements, base insulators and surge
counters with or without ammeter can be supplied at customer’s request.
All our double and triple stack surge arresters include grading rings and corona
rings if necessary. All surge arresters are delivered including stainless steel
mounting bolts.
ZnO Polymer Housed Surge Arresters
For nominal system voltages up to 161 kV
Introduction
The new generation of polymer housed surge arresters incorporates a superior
polymer material that is recognized by the industry.
Our station class polymer surge arresters are designed & tested in accordance with
the ANSI - IEEE C62.11 and IEC-60099-4 standards. These polymer surge arresters
are suitable for both indoor & outdoor applications. Additional tests at -50 C° are
performed to meet the temperature requirements for the Canadian market.
These surge arresters have the following features:
>
>
>
>
>
>
>
Excellent protection against the ingress of moisture
Improved cantilever strength
High fault current capability
Excellent protective characteristics
Light weight
High durability
Superior performance in the presence of contamination
The type ZPL2 station class arresters offer the benefits of polymer housings for
nominal system voltages up to 161 kV. The ZPL2 arresters are approximately 1/5
the weight of the porcelain equivalent resulting in ease of handling and installation.
Performance
The ZPL2 arrester has the following properties.
>
>
>
>
TOV capability for 1 second: 1.43
Energy Absorption Capability: 5.4 kJ / kV MCOV
Pressure Relief Capability: 65 kA rms sym.
Working cantilever strength: 5200 lb-in
We are able to customize the surge arresters in such way to meet any MCOV and
TOV requirement. Please contact your nearest company representative for solutions
to your special needs.
ZnO Polymer Housed Surge Arresters
For nominal system voltages up to 161 kV
Design of ZPL2 Arresters
Pressure Relief Capability
The design consists of a number of Zinc Oxide elements contained within a
fiberglass winding that is then inserted into the silicon rubber housing. Type ZPL2
arresters are shipped as single units for Duty Cycle Voltages from 3 kV to 72 kV.
> Increases reliability and availability by shifting a number of maintenance critical
components to the mainland; by applying hybrid transformer designs in combination with on-line monitoring systems;
> The onshore booster reduces the short circuit currents for the submarine cable
and offshore platform HV equipment and allows for smaller installed reactive
power on the offshore platform;
> No need for a separate SVC, as the wind turbine generators will be used as a VAR
compensator;
> Reduction of weight on the offshore platform, due to the lower oil volume of the
main power transformer and reactors;
> Integrated switching design without switching transients;
> Integrated design with regard to the compensation of the reactive power, in full
compliance with the grid operator’s requirements;
> Maintenance of and interventions on the most maintenance critical components
are mainly shifted to the mainland (accessible 7/7 days and 24/24 hours).
Polymer Housing (Silicon Rubber)
The housing is manufactured by CGL and has been tested to provide long life even
under contaminated conditions. Electrical and mechanical tests on the housing have
included contamination tests, over-voltage tests, ultraviolet tests, thermal cycle and
tracking wheel tests. The true test of a product or material always takes place in the
field.
Increased return on investment
The severity of a failure depends on the duration and magnitude of the available fault
current passing through the arrester at the time of the failure. The ZPL2 type arrester,
with its polymer housing, eliminates the potential danger of porcelain fragmentation.
The ZPL2 design uses a fiberglass epoxy wrap to relieve the pressure that builds up
during a failure. The arresters achieve a pressure relief capability of over 65 kA rms
symmetrical.
Electrical and Physical Characteristics
Catalog No
ZPL2003
ZPL2005
ZPL2007
ZPL2008
ZPL2010
ZPL2013
ZPL2015
ZPL2017
ZPL2019
ZPL2022
ZPL2024
ZPL2029
ZPL2031
ZPL2036
ZPL2039
ZPL2042
ZPL2048
ZPL2057
ZPL2070
ZPL2076
ZPL2084
ZPL2098
ZPL2106
ZPL2115
Switching
Steep Current
Current
Reference
Discharge Min. Leakage
Discharge
Fig below
Voltage
Voltage at
Duty Cycle
Voltage
MCOV
(kV)
(kV)
At 1.5kA
At 3.0kA
At 5.0kA
At 10kA
At 20kA
At 40kA
500A (kV)
10kA (kV)
In/mm
3
6
9
10
12
15
18
21
24
27
30
36
39
45
48
54
60
72
90
96
108
120
132
144
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
29
31.5
36.5
39
42
48
57
70
76
84
98
106
115
6.7
13.3
20
22.1
26.7
33.3
40.4
44.6
53.3
60.8
66.7
78.3
85
98
103
117
133
157
197
205
233
258
303
335
6.7
13.3
20
22.1
26.7
33.3
40.4
44.6
53.3
60.8
66.7
78.3
85
98
103
117
133
157
197
205
233
258
303
335
6.7
13.3
20
22.1
26.7
33.3
40.4
44.6
53.3
60.8
66.7
78.3
85
98
103
117
133
157
197
205
233
258
303
335
8
16
24
26.5
32
40
48.5
53.5
64
73
80
94
102
118
124
140
160
188
236
246
280
310
335
370
9
18.1
27.1
30
36.2
45.2
54.9
60.5
72.4
82.6
90.5
106
115
133
140
158
181
213
267
278
317
351
370
408
10.4
20.8
31.1
34.4
41.5
51.9
62.9
69.4
83
94.7
103.8
122
132
153
161
182
208
244
306
319
363
402
419
463
6.2
12.5
18.7
20.7
25
31.2
37.9
41.8
50
57
62.4
73.4
79.6
92.1
97
109
125
147
184
192
219
242
261
289
8.8
17.7
26.5
29.3
35.4
44.2
53.6
59.1
70.7
80.7
88.4
104
113
130
137
155
177
208
261
272
309
343
370
409
8.8
17.7
26.5
29.3
35.4
44.2
53.6
59.1
70.7
80.7
88.4
104
113
130
137
155
177
208
261
272
309
343
370
409
Fig 1
‘A’ : Overall Height
Line terminal option 2
Discharge Voltage (8/20S) (kV)
Line terminal standard
Fig 2
Ground terminal standard
Available
The above table summarizes the electrical and mechanical properties of the ZPL 2
surge arresters. As a standard we offer each surge arresters with the NEMA four hole
line and ground terminal and the standard US 10” bolt circle mounting arrangement.
8.8
17.7
26.5
29.3
35.4
44.2
53.6
59.1
70.7
80.7
88.4
104
113
130
137
155
177
208
261
272
309
343
370
409
Height
“A”
Approx.
Net Wt
In/mm
Lb
9.8/245
9.8/245
9.8/245
9.8/245
9.8/245
17.1/425
17.1/425
17.1/425
17.1/425
17.1/425
17.1/425
21.2/530
21.2/530
21.2/530
30.8/770
30.8/770
30.8/770
30.8/770
45.2/1130
45.2/1130
59/1475
59/1475
59/1475
59/1475
9.8/245
9.8/245
9.8/245
9.8/245
9.8/245
17.1/425
17.1/425
17.1/425
17.1/425
17.1/425
17.1/425
21.2/530
21.2/530
21.2/530
30.8/770
30.8/770
30.8/770
30.8/770
45.2/1130
45.2/1130
59/1475
59/1475
59/1475
59/1475
Line terminal option 1
Ground terminal option1
Standard US 10” bolt circle mounting
Optional line and ground terminal arrangements, base insulators and surge counters
with or without ammeter can be supplied at customer’s request. All of our surge arresters include stainless steel mounting bolts.
Note: CG Power Systems reserves the right to change the design and specifications in this
catalogue without notice, due to continuous product improvements.
Contact
CG Sales Networks USA Inc
One Pauwels Drive - Washington 63090, MO - USA
Tel. + 1 636 239 9300 - Fax + 1 636 239 1556
usa@cgglobal.com - www.cgglobal.com