Surge Arresters
Functional Specification Guide
Polymer-Housed UXL High-Strength Station-Class Arrester
G235-104-1
Functional Specification for Polymer-Housed UXL High-Strength Station-Class Surge Arresters
1. Scope:
1.1 This specification covers the electrical and mechanical characteristics of polymerhoused high-strength station-class arresters.
2. Applicable Standards:
2.1. The surge arresters shall meet the requirements of IEEE Std C62.11™-2012 standard
“Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits”.
3. Construction:
3.1. Arresters shall be polymer-housed station-class. The housing should contain a
minimum of 75% silicone rubber. Housings, which are primarily EPDM, EPR or other
carbon-based materials, are not acceptable.
4. Cantilever Strength:
4.1. Polymer-housed station-class arresters should meet ultimate cantilever strength, in inlbs, for the following designs:
UXLB (3-360 kV)
80,000 in-lbs
UXLC (132-360 kV) 92,000 in-lbs
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Surge Arresters
Functional Specification Guide
G235-104-1
Polymer-Housed UXL High-Strength Station-Class Arrester
5. Creepage Distance:
5.1. The arrester housing shall have minimum creepage distance per the following table:
Arrester
Rating
(kV, rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
Creep UXLB
(in)
38
46
46
46
54
54
61
61
69
69
77
84
84
92
92
100
108
108
123
123
169
177
184
192
200
Creep UXLC
(in)
-
Arrester
Rating
(kV, rms)
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
Creep UXLB
(in)
215
246
246
307
307
330
330
353
399
422
430
438
445
453
484
614
614
691
706
722
783
360
845
Creep UXLC
(in)
322
322
330
345
345
422
429
445
460
460
468
460
483
690
698
714
721
798
829
836
859
6. Terminals
6.1. Terminals shall have solderless clamp-type connections suitable to accept up to 1.15”
diameter conductors.
7. Mounting Provisions:
7.1. The arrester shall be supplied with a 3-hole mounting base using an 8.75”-10” diameter
bolt circle pattern. The bolt-holes should be sized for .5” diameter bolts.
8. Nameplate:
8.1. The arrester should specify the manufacturer name, catalog number, serial number,
arrester rating and MCOV. It should be permanently affixed to the mounting base.
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Surge Arresters
Functional Specification Guide
G235-104-1
Polymer-Housed UXL High-Strength Station-Class Arrester
9. Protective Characteristics:
9.1. The arrester shall have discharge voltages, which do not exceed the following switching
surge energy rating (two shot-thermal):
UXL - Standard Energy Handling (minimum 15 kJ/kV of MCOV)
TOV*
Arrester
Rating
(kV, rms)
3
6
9
10
12
15
18
21
24
27
30
33
36
39
42
45
48
54
60
66
72
78
84
90
96
108
120
132
138
144
162
168
172
180
192
198
204
216
228
240
258
264
276
288
312
330
336
360
*
**
***
Arrester
MCOV
(kV rms)
2.55
5.1
7.65
8.4
10.2
12.7
15.3
17
19.5
22
24.4
27.5
29
31.5
34
36.5
39
42
48
53
57
62
68
72
76
84
98
106
111
115
130
131
140
144
152
160
165
174
180
190
209
212
220
230
245
267
272
289
1 sec
3.5
6.9
10.4
11.4
13.9
17.2
20.8
23.1
26.5
29.9
33.1
37.3
39.4
42.8
46.2
49.6
53
57
65.2
72
77.4
84.2
92.3
97.8
103.2
114.1
133.1
143.9
150.7
156.2
176.5
177.9
190.1
195.6
206.4
217.3
224.1
236.3
244.4
258
283.8
287.9
298.8
312.3
332.7
362.6
369.4
392.5
10 Sec
3.3
6.6
9.9
10.8
13.1
16.4
19.7
21.9
25.1
28.4
31.5
35.4
37.4
40.6
43.8
47
50.3
54.1
61.9
68.3
73.5
79.9
87.7
92.8
98
108.3
126.3
136.6
143.1
148.2
167.6
168.9
180.5
185.6
195.9
206.2
212.7
224.3
232
244.9
269.4
273.3
283.6
296.5
315.8
344.2
350.6
372.5
Front-ofwave
Protective
Level**
(kV Crest)
7.7
15.3
22.5
24.7
30
37.3
45
50
57.3
64.7
71.7
80.8
85.2
92.6
99.9
108
115
124
141
156
168
183
200
212
224
247
288
312
326
338
382
385
412
423
447
470
485
512
529
558
614
623
647
676
720
758
820
849
Maximum Discharge Voltage
(kV Crest)
1.5kA
6.2
12.5
18.4
20.2
24.5
30.4
36.7
40.7
46.7
52.7
58.4
65.8
69.4
75.4
81.4
87.4
93.4
101
115
127
137
149
163
173
182
201
235
254
266
276
312
314
335
345
364
383
395
417
431
455
501
508
527
551
587
618
668
692
3kA
6.5
13
19.2
21.1
25.6
31.9
38.4
42.6
48.9
55.2
61.2
68.9
72.7
79
85.2
91.5
97.7
106
121
133
143
156
171
181
191
211
246
266
279
289
326
329
351
361
381
401
414
436
451
476
524
532
552
577
614
647
699
724
5kA
6.8
13.5
20
21.9
26.6
33.1
39.9
44.3
50.8
57.3
63.6
71.6
75.5
82
88.6
95.1
102
110
125
138
149
162
178
188
198
219
256
276
289
300
339
342
365
375
396
417
430
453
469
495
545
552
573
599
638
672
727
753
10kA
7.3
14.6
21.5
23.6
28.7
35.7
43
47.7
54.8
61.8
68.5
77.2
81.4
88.4
95.4
103
110
118
135
149
160
174
191
202
214
236
275
298
312
323
365
368
393
404
427
449
463
489
505
533
587
595
618
646
688
724
783
811
20kA
7.8
15.6
23
25.2
30.6
38.1
45.9
51
58.5
66
73.2
82.5
87
94.5
102
110
117
126
144
159
171
186
204
216
228
252
294
318
333
345
390
393
420
432
456
480
495
522
540
570
627
636
660
690
735
774
837
867
Temporary Overvoltage (TOV) with Prior Duty.
Based on a 10 kA current impulse that results in a discharge voltage cresting in 0.5 µs.
45-60 µs rise time for a 500 A peak current surge.
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Switching Surge Protective Level
(kV Crest)
40kA
8.6
17.2
25.3
27.8
33.8
42
50.6
56.2
64.5
72.7
80.7
90.9
95.9
105
113
121
129
139
159
176
189
205
225
238
252
278
324
351
367
380
430
433
463
476
503
529
546
575
595
628
691
701
727
760
810
853
922
955
125A
5.5
11
16.2
17.8
21.7
27
32.4
36
41.3
46.6
51.7
58.3
61.5
66.8
72
77.4
82.6
89
102
113
121
132
144
153
161
178
208
225
236
244
276
278
297
305
322
339
350
369
382
403
443
449
466
488
519
547
591
613
250A
5.7
11.3
16.6
18.3
22.2
27.6
33.2
36.9
42.3
47.8
53
59.7
62.9
68.4
73.8
79.2
84.6
91.1
105
115
124
135
148
157
165
183
213
230
241
250
282
285
304
313
330
347
358
378
391
412
454
460
478
499
532
560
605
627
500A***
5.8
11.6
17.1
18.8
22.8
28.4
34.2
38
43.6
49.2
54.5
61.4
64.8
70.4
76
81.6
87.1
93.8
108
119
128
139
152
161
170
188
219
237
248
257
291
293
313
322
340
358
369
389
402
425
467
474
492
514
548
577
623
646
1000A
6
12
17.7
19.5
23.6
29.4
35.4
39.3
45.1
50.9
56.4
63.6
67.1
72.9
78.6
84.4
90.2
97.1
111
123
132
144
158
167
176
195
227
246
257
266
301
303
324
333
352
370
382
403
417
440
484
490
509
532
567
597
645
668
Surge Arresters
Functional Specification Guide
Polymer-Housed UXL High-Strength Station-Class Arrester
G235-104-1
10. Standard Production Tests:
10.1. Every metal oxide varistor and arrester shall be 100% production tested as follows to
demonstrate compliance with the manufacturers’ specifications. Test report should be
supplied with each arrester. Each arrester shall be marked with a unique serial
number to allow tracking for at least 20 years from date of production.
10.1.1. Metal Oxide Varistor Tests
10.1.1.1.
10.1.1.2.
10.1.1.3.
Measure Reference Voltage at specified Reference Current.
This voltage level must fall within the parameters established
by the manufacturer.
The discharge voltage of each MOV must be measured per
IEEE Std C62.11™-2012 standard, Section 12.2, “Discharge
Voltage Test”.
The leakage current must be measured by a method
prescribed by the manufacturer.
10.1.2. Complete Arrester Tests
10.1.2.1.
10.1.2.2.
10.1.2.3.
The partial discharge must be measured at no less than 1.05
times MCOV.
The Watts Loss must be measured at no less than 1.05 times
MCOV.
The arrester reference voltage must be verified for each
arrester.
11. Quality Assurance
11.1. Any varistor or complete arrester that does not comply with the requirements of these
specifications shall be rejected.
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