IEEE DESIGN TEST REPORT
Report No. TD 01 26 E00
Type PVI-LP Intermediate Class
Surge Arrester
This report records the results of the design tests made on Type PVI-LP
Intermediate Class surge arresters in accordance with IEEE Standard C62.112012 “IEEE Standard for Metal Oxide Surge Arresters for AC Power Circuits (>
1kV)”.
To the best of our knowledge and within the usual limits of testing practices, tests
performed on the Type PVI-LP arresters demonstrate full compliance with the
relevant clauses of the referenced standard. This is an updated version of
EU1464.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Separate reports provide details of the tests, according to the following table:
Report No.
Description
Clause
Issue Date
TD 01 26 E01
TD 01 26 E02
Insulation Withstand
8.1
Discharge Voltage
8.2
07/03/2014
07/03/2014
TD 01 26 E03
MOV Disc Accelerated Aging
8.5
07/03/2014
TD 01 26 E04
Salt Fog Accelerated Aging
8.7
07/03/2014
TD 01 26 E05
Thermal Equivalency
7.2.2
07/03/2014
TD 01 26 E06
Partial Discharge
8.11
07/03/2014
TD 01 26 E07
Switching Surge Energy Rating
8.14
07/03/2014
Single-Impulse Withstand Rating
8.15
TD 01 26 E09
Duty Cycle
8.16
07/03/2014
TD 01 26 E10
Temporary Overvoltage
8.17
07/03/2014
TD 01 26 E11
Short Circuit Pressure Relief
8.18
07/03/2014
TD 01 26 E12
MDCL and Moisture Ingress
8.22
07/03/2014
TD 01 26 E08
07/03/2014
TYPE TEST REPORT No. TD 01 26 E01
Insulation Withstand Tests on PVI-LP Arrester Housing
CERTIFICATION
This is to certify the insulation withstand test capability of the Ohio Brass Type
PVI-LP Intermediate Class surge arresters.
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
DESIGN TEST REPORT
Type PVI-LP Intermediate Class Surge Arrester
TITLE: Arrester Insulation Withstand Tests:
OBJECTIVE: To demonstrate that the voltage withstand capability of the arrester
housing external insulation meets the requirements as specified in Section 8.1.2.1 of
IEEE C62.11-2012 Standard.
CONCLUSION: Table 1 lists PVI-LP arrester minimum strike distance and leakage
distance as well as required 1.2/50 impulse withstand and 10 second wet withstand
capabilities. All PVI-LP arrester ratings meet or exceed these required levels of
withstand voltage.
Table 1
Summary Data - Insulation Withstand Test
Required
Actual
Required
Actual
Arrester
Arrester
1.2/50
1.2/50
60 HZ
60 HZ
Rated
Strike
Leakage
Impulse
Impulse
Catalog
MCOV
Voltage
Distance
Distance
Withstand
Withstand
10
second
Wet W/S
No.
(kV rms )
(kV rms )
(in)
(in)
(kV c )
(kV c )
(kV rms )
10
second
Wet
W/S
(kV rms )
300803
2.55
3
5.6
15.4
12
100
5
20
300805
5.1
6
5.6
15.4
25
100
10
20
300808
7.65
9
5.6
15.4
38
100
15
20
300809
8.4
10
5.6
15.4
42
100
16
20
300610
10.2
12
5.6
15.4
50
100
19
20
300813
12.7
15
10.8
30.8
63
160
24
40
300815
15.3
18
10.8
30.8
76
160
29
40
300817
17
21
10.8
30.8
83
160
32
40
300620
19.5
24
10.8
30.8
100
160
37
40
300822
22
27
16.1
46.2
113
210
42
61
300824
24.4
30
16.1
46.2
125
210
46
61
300629
29
36
16.1
46.2
150
210
55
61
300831
31.5
39
21.3
61.6
159
230
60
80
300636
36.5
45
21.3
61.6
184
230
69
80
300639
39
48
21.3
61.6
200
230
74
80
300642
42
54
26.5
77
217
260
80
95
300648
48
60
26.5
77
242
260
91
95
300657
57
72
31.7
92.4
292
310
108
110
TD 01 26 E01
2
TYPE TEST REPORT No. TD 01 26 E02
Discharge Voltage Characteristic
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
DESIGN TEST REPORT
Type PVI-LP Intermediate Class Surge Arrester
TITLE: Discharge-voltage characteristic
TEST OBJECTIVE: These measurements are used to obtain the maximum discharge
voltages at various current magnitudes and wave shapes.
TEST PROCEDURE: Discharge voltage tests were performed on three single disc test
samples. Tests were conducted in accordance with clause 8.3 of IEEE Standard C62.112012. Test samples were subjected to 8/20 current waves with magnitudes ranging from
1.5 kA through 20 kA. In addition, switching surge and front-of-wave (FOW) discharge
voltage tests were performed. FOW tests results included the L di/dt inductive voltage
drop of the arrester.
TEST SAMPLES: Arresters are assembled from discs accumulated within 10 kA IR
ranges as specified for each arrester rating. To verify catalog maximum IR levels were
not exceeded, a discharge voltage ratio was established at each current level based on the
test sections 10 kA IR (Table 1). That ratio was multiplied by the maximum allowed 10
kA IR accumulation specified for each rating. As summarized on Table 2, the IR
calculated based on the prorated test sections do not exceed the maximum declared
catalog levels.
TEST RESULTS: Table 1 summarizes the results of residual voltage tests performed on
three MOV test samples. Table 2 lists the claimable catalog IRs foe each rated arrester
versus its actual measured values. Note that the total FOW value includes L di/dt arrester
inductive voltage drop. In attached Annex, Figures 1-11 contain oscillograms of residual
voltage test samples at each current and wave shape.
Table 1
Sample Discharge Voltage Data Summary
Discharge Voltage (kV)
Impulse Current
(A)
Wave Shape
125
Discharge Voltage Ratio
60/100
Sample
1
12.310
Sample
2
12.283
Sample
3
12.323
Sample
1
0.816
Sample
2
0.814
Sample
3
0.815
500
60/100
13.009
13.009
13.023
0.862
0.861
1,500
8/20
13.830
13.884
13.884
0.916
0.862
0.920
3,000
8/20
14.422
14.422
14.449
0.955
0.955
0.955
5,000
8/20
15.095
15.095
15.122
1.000
1.000
1.000
10,000
8/20
16.332
16.359
16.386
1.082
1.084
20,000
8/20
17.758
17.731
17.893
1.176
1.175
1.084
1.183
40,000
8/20
19.965
19.965
20.045
1.323
1.326
5,000
.5 FOW
16.01
16.124
16.075
1.061
1.323
1.068
10,000
.5 FOW
17.495
17.511
17.479
1.159
1.160
1.156
TD 01 26 E02
0.918
1.063
2
Table 2: Type PVI-LP Arrester Discharge Voltage Summary
MCOV
Rating
2.55
3
IR Multiplier
0.797
0.849
0.883
0.924
1
1.092
8/20
0.986
Disc
0.5usec
Waveshape
60/100
8/20
8/20
8/20
8/20
Total
FOW
I (kA)
0.5
1.5
3
5
10
20
5
5
Measured IR
6.4
6.8
7.1
Catalog IR
6.5
6.9
7.2
7.4
8
8.7
7.9
7.5
8.1
8.8
8.0
8.8
8.9
5.1
6
Measured IR
12.8
13.7
14.2
14.9
16.1
17.6
15.9
Catalog IR
12.9
13.8
14.3
15.0
16.2
17.7
16.0
16.7
16.8
7.65
9
Measured IR
19.4
20.6
21.5
22.5
24.3
26.5
24.0
24.8
Catalog IR
19.4
20.7
21.5
22.5
24.4
26.6
24.1
24.9
Measured IR
21.4
22.8
23.7
24.8
26.8
29.3
26.4
27.3
Catalog IR
21.4
22.8
23.8
24.9
26.9
29.4
26.5
27.4
Measured IR
25.7
27.3
28.4
29.8
32.2
35.2
31.7
32.6
Catalog IR
25.7
27.4
28.5
29.8
32.3
35.3
31.8
32.7
Measured IR
32.2
34.3
35.7
37.3
40.4
44.1
39.8
41.4
Catalog IR
32.4
34.5
35.8
37.5
40.6
44.3
40.0
41.6
Measured IR
38.7
41.3
42.9
44.9
48.6
53.1
47.9
49.5
Catalog IR
38.9
41.4
43.1
45.1
48.8
53.3
48.1
49.7
Measured IR
42.7
45.5
47.3
49.5
53.6
58.5
52.8
54.4
Catalog IR
42.9
45.7
47.5
49.7
53.8
58.7
53.0
54.6
Measured IR
51.3
54.7
56.9
59.5
64.4
70.3
63.5
65.0
Catalog IR
51.5
54.8
57.0
59.7
64.6
70.5
63.7
65.2
Measured IR
58.1
61.9
64.4
67.4
72.9
79.6
71.9
74.1
Catalog IR
58.3
62.1
64.6
67.6
73.2
79.9
72.2
74.4
Measured IR
64.1
68.3
71.0
74.3
80.4
87.8
79.3
81.5
Catalog IR
64.3
68.5
71.3
74.6
80.7
88.1
79.6
81.8
Measured IR
77.0
82.0
85.3
89.3
96.6
105.5
95.2
97.5
Catalog IR
77.2
82.3
85.6
89.5
96.9
105.8
95.5
97.8
Measured IR
81.5
86.8
90.2
94.4
102.2
111.6
100.8
103.7
Catalog IR
81.8
87.1
90.6
94.8
102.6
112.0
101.2
104.1
Measured IR
94.0
100.2
104.2
109.0
118.0
128.9
116.3
119
Catalog IR
94.4
100.5
104.5
109.4
118.4
129.3
116.7
120
Measured IR
102.7
109.4
113.7
119.0
128.8
140.6
127.0
130
Catalog IR
103.0
109.7
114.1
119.4
129.2
141.1
127.4
130
Measured IR
111.1
118.4
123.1
128.8
139.4
152.2
137.4
141
Catalog IR
111.5
118.8
123.5
129.3
139.9
152.8
137.9
142
Measured IR
124.0
132.1
137.4
143.8
155.6
169.9
153.4
157
Catalog IR
124.4
132.5
137.8
144.2
156.1
170.5
153.9
158
Measured IR
149.6
159.4
165.7
173.4
187.7
205.0
185.1
189
Catalog IR
150.2
160.0
166.4
174.1
188.4
205.7
185.8
190
8.4
10.2
12.7
15.3
17
19.5
22
24.4
29
31.5
36.5
39
42
48
57
TD 01 26 E02
10
12
15
18
21
24
27
30
36
39
45
48
54
60
72
3
ANNEX
Oscillograms
TD 01 26 E02
4
Figure 1
Sample #2
125 A, 12.283 kV, 52/91 Wave Shape
Figure 2
Sample #2
500 A, 13.009 kV, 52/96 Wave Shape
TD 01 26 E02
5
Figure 3
Sample #2
1.5 kA, 13.884 kV, 8.4/20 Wave Shape
Figure 4
Sample #1
3 kA, 14.422 kV, 8.5/20 Wave Shape
TD 01 26 E02
6
Figure 5
Sample #2
5 kA, 15.095 kV, 8.5/18.7 Wave Shape
Figure 6
Sample #1
10 kA, 16.332 kV, 8.4/18.4 Wave Shape
TD 01 26 E02
7
Figure 7
Sample #2
20 kA, 17.731 kV, 8.4/19.7 Wave Shape
Figure 8
Sample #3
40 kA, 20.045 kV, 8.6/20.2 Wave Shape
TD 01 26 E02
8
Figure 9
Sample #1
5 kA FOW, 16.010 kV @ .5 microseconds to voltage crest
Figure 10
Sample #2
10 kA FOW, 17.511 kV @ .5 microseconds to voltage crest
TD 01 26 E02
9
TYPE TEST REPORT No. TD 01 26 E03
Disc Accelerated Aging
PVI-LP Arrester
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
DESIGN TEST REPORT
PVI-LP Intermediate Class Surge Arrester
TITLE: MOV Disc Accelerated aging procedure
TEST PROCEDURE: Tests were performed to verify that the varistors remain stable
and do not increase in power dissipation at MCOV during their expected lifetime.
TEST SAMPLES: Six arrester sections were prepared. Three sections consisted of the
shortest 48mm diameter disc and three consisted of the longest 48mm diameter disc.
Each section also consisted of a spring, end terminals, barrier film and fiberglass/epoxy
wrap using standard module construction.
TEST PROCEDURE: Tests were performed per section 8.5 of IEEE Standard C62.112012. Samples were placed inside a 115 °C ±2 °C. oven and energized at a voltage level
greater than MCOV for 1,000 hours.
TEST RESULTS: Watts loss for each sample was measured at MCOV two hours after
energization and at the completion of the 1000 hour test duration. The table below
summarizes test data.
Accelerated aging test data
Section No.
1
2
3
4
5
6
Watts Loss at 2 hours @ MCOV
4.31
3.91
4.26
14.92
20.17
13.72
Watts Loss at 1000 hours @ MCOV
1.74
1.64
1.68
4.24
4.26
4.35
CONCLUSION: Each test section demonstrated continually declining watts loss at
MCOV during the 1000 hour test duration confirming stability.
TD 01 26 E03
2
IEEE Design Test Report
Report No. TD 01 26 E04
Type EVP Station Class Arrester
Salt Fog Accelerated Aging Test
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Type PVI-LP Intermediate Class Surge Arrester
Salt Fog Accelerated Aging
INTRODUCTION:
The polymer housing accelerated aging tests were performed per Section 8.7 of
the IEEE C62.11-2012 standard. The purpose of this test was to verify the
electrical integrity of the arrester polymer housing after being subjected to 1000
hours in a salt fog environment.
SAMPLE PREPARATION:
A 48 kV rated PVI-LP arrester was assembled for this test.
TEST PROCEDURE:
The 1000 hour weathering test was performed per Section 8.7.3 of the IEEE
C62.11-2012 standard.
TEST RESULTS:
The test arrester successfully withstood the 1000 hour salt fog exposure test with
no evidence of surface tracking, erosion, or puncturing. Per Section 8.7.4, the
reference voltage change, as a result of the 1000 hour test, was less than the
allowed 5%. In addition, the partial discharge measured at the completion of the
test was less than the allowed 10pC.
TEST CONCLUSIONS:
The 48 kV rated PVI-LP Intermediate Class arrester design successfully passed
the 1000 hour salt fog test, as defined in Section 8.7 of the IEEE C62.11-2012
standard.
TD 01 26 E04
2
IEEE Design Test Report
Report No. TD 01 26 E05
Type PVI-LP Intermediate Class Arrester
Thermal Equivalency
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Type PVI-LP Station Class Surge Arrester
Thermal Equivalency
INTRODUCTION: The polymer housing accelerated aging tests were performed
per Section 7.2.2.3 of the IEEE C62.11-2012 standard.
PURPOSE: The purpose of this test is to verify that the thermal cooling curve for
the Type PVI-LP prorated section, when internally heated, will cool slower than
that of a full size PVI-LP arrester unit.
PROCEDURE: The full size arrester and the prorated section were heated up by
applying a temporary overvoltage to the test samples. The test procedure is
defined in Section 7.2.2.3 of IEEE C62.11-2012 Standard. The full size arrester
section was instrumented with (1) internal thermocouple located in the middle of
the MOV disc stack. The temperature of the arrester thermocouple was
monitored at 5 minute intervals to develop the arrester unit cooling curve. The
prorated section was instrumented with a single thermocouple and its cooling
rated was also monitored at 5 minute intervals. The cooling rate during the 1st 15
minutes was slower for the PVI-LP section than the arrester. To assure thermal
equivalency, as allowed by the standard, the starting temperature of the section
cooling curve was raised from the targeted 140 ºC point (for the arrester) to 144
ºC for the prorated section.
SUMMARY: The following cooling curve confirms that the cooling rate of the PVILP prorated section is slower than that of the full size PVI-LP arrester unit,
confirming the thermal equivalency of the prorated section to the full size
arrester.
TD 01 26 E05
2
160
Corrected Cooling Curve for PVI-LP Prorated
+4
Section Vs Arrester
140
Temperature degrees C
120
100
80
60
40
20
0
0
TD 01 26 E05
20
40Prorated Section
60
Time- Minutes
80
Arrester
100
120
3
IEEE Design Test Report
Report No. TD 01 26 E06
Type PVI-LP Intermediate Class Arrester
Partial Discharge
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate arrester design.
Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Type PVI-LP Intermediate Class Surge Arrester
Partial Discharge
INTRODUCTION:
The polymer housing partial discharge test was performed per Section 8.11 of
the IEEE C62.11-2012 standard. The test was performed on a 57 kV MCOV PVILP arrester.
TEST EQUIPMENT:
Equipment and test methods conformed to the IEEE 454-1979 standard.
TEST RESULTS:
The arrester with grading ring was energized at 1.05 times MCOV. The arrester’s
partial discharge level measured 2.0 pC, with an ambient 6.0 pC background
level.
CONCLUSION:
In addition to successfully passing the partial discharge design test, all PVI-LP
arresters are routinely tested on partial discharge to insure that all arresters meet
the required 10 pc limit.
TD 01 26 E06
2
IEEE Design Test Report
Report No. TD 01 26 E07
Type PVI-LP Intermediate Class Arrester
Switching Surge Energy Rating
This report summarizes the results of design tests made on the Type PVI-LP Intermediate
Class arrester design. Tests were performed in accordance with procedures of IEEE Std
C62.11-2012, “IEEE Standard for Metal-Oxide Surge Arresters for AC Power Circuits (>
1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses of the
referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Type PVI-LP Intermediate Class Surge Arrester
Switching Surge energy Rating
INTRODUCTION: Switching surge energy rating tests were performed per section 8.14
of the IEEE C62.11-2012 standard. Tests were performed per Station Class arrester
requirements. The main objective of this test is to claim an energy class as per Table 13
of the above mentioned standard.
TEST SAMPLE: As required by the standard, three prorated sections were tested.
TEST PROCEDURE: The test sections were conditioned with six groups of three
current impulses corresponding to energy class D (7.5 kJ/kV). The assigned conditioning
level testing was followed by two 65kA, 4/10 impulses, spaced 50 to 60 seconds apart.
The prorated sections were then placed into an oven until the temperature stabilized at
64°C.
After stabilization, test samples were subjected to long duration current impulses (2000 to
3000 µs). Within 100ms from the application of the second discharge the duty cycle rated
voltage was applied for 10s followed by power frequency recovery voltage for 30mins to
demonstrate thermal recovery.
TEST RESULTS:
The targeted energy class for this design was Class D with a 2-shot energy rating of 7.5
kJ per kV MCOV. As such, all test sections were subjected to 18 shots having a 3.75 kJ
per kV MCOV energy rating.
Figure 1 shows a typical 2200 microsecond duration Class D conditioning impulse while
Figure 2 shows an oscillogram of a typical 65 kA high current impulse.
TD 01 26 E07
2
Figure 1: Conditioning impulse at class D
Figure 2: Example of 65kA (4/10) impulse waveform
TD 01 26 E07
3
During the thermal recovery portion of the switching surge energy rating test, it was
discovered that the prorated test sections could not thermally recover after exposure to
the required Class D 7.5 kJ per kV MCOV energy discharges, followed by 10 seconds at
rated voltage.
The thermal recovery testing was repeated at the Class C 2-shot energy rating level of 6.0
kJ per kV MCOV. Figure 3 shows an oscillogram of the 2nd energy discharge followed by
10 seconds at rated voltage on section 2, while Figures 4, 5, and 6 demonstrate the
thermal stability of that test section during the recovery voltage portion of the test.
Figure 3: Class C energy shot on Section 2 (34.2 kJ/shot)
TD 01 26 E07
4
Figure 4: Recovery Oscillogram on Section 2 @ Recovery Time = 0
Figure 5: Recovery Oscillogram on Section 2 @ Recovery Time = 1 minute
Figure 6: Recovery Oscillogram on Section 2 @ Recovery Time = 30 minute
TD 01 26 E07
5
Table 1 summarizes the results of the 2-shot energy rating test performed on the three
sections preheated to 64 degree C. Table 2 records the 10 second Ur grading current,
while Table 3 summarizes section watts during the 30 minute recovery test.
Table 1- 2-Shot Energy
Section #
1
MCOV-kV rms
11.32
2
11.32
3
11.32
Shot No.
AMPS
KJ/Shot
1
538.1
34.33
2
532.3
34.74
1
544.2
34.28
2
533.2
34.31
1
538.1
34.33
2
532.3
34.74
KJ/MCOV kV rms
3.03
3.07
3.03
3.03
3.03
3.07
Table 2- 10 Second Ur Data
Section #1
60Hz (mA)
Section #2
60Hz (mA)
Section #3
60Hz (mA)
0.07
89.2
80.8
90.8
1.01
79.2
79.6
90.4
2.04
72.1
76.3
87.5
3.05
70.4
72.1
77.5
4.03
68.3
69.2
77.5
5.01
66.7
67.5
77.9
6.05
66.3
66.3
75.0
7.00
65.4
62.9
73.3
8.00
63.3
62.5
75.4
9.13
62.5
60.8
71.7
10.20
62.1
60.0
72.9
Time
(sec)
Table 3- 30 Minute Thermal Stability Recovery Test
Section #1
Section #2
Section #3
Elapsed TimeMinutes
Watts
Watts
Watts
0:00:00
30.47
29.96
26.90
0:00:30
21.32
20.03
18.80
0:01:00
16.20
16.14
15.25
0:02:00
12.86
11.99
11.53
0:05:00
9.06
9.12
8.15
0:10:00
7.27
7.42
6.13
0:20:00
5.36
5.41
4.43
0:30:00
4.17
4.06
3.42
TD 01 26 E07
6
Per the test evaluation procedure as specified in Section 8.14.5 of the standard, the
switching surge voltage of each test section was measured before and after the energy
surge duty testing. Table 4 summarizes the results of this testing. Additionally, each test
section showed no evidence of physical damage.
Table 4: .5 kA Switching Surge IRs before and after
Section #
1
2
3
.5 kA IR Before (kVc)
25.454
25.454
25.508
.5 kA IR After (kVc)
25.857
25.884
25.938
% Change
1.58%
1.69%
1.69%
CONCLUSION: The Type PVI-LP prorated sections successfully passed the switching
surge energy requirements of Energy Class C as specified in Table 13 of IEEE C62.112012.
TD 01 26 E07
7
65
IEEE Design Test Report
Report No. TD 01 26-E08
Type PVI-LP Intermediate Class Arrester
Single Impulse Withstand Rating
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Type PVI-LP Intermediate Class Surge Arrester
Single Impulse Withstand rating test
INTRODUCTION: The single-impulse withstand rating test was performed per
Section 8.15 of the IEEE C62.11-2012 standard, on ten MOV blocks.
TEST PROCEDURE: Test was performed on 10 of the longest MOV blocks used
in the PVI-LP product line. The discharge voltage (5kA, 8/20) and the reference
voltage (at 7.0 mA) were measured before and after the long duration impulses
for evaluation. Each sample was then subjected to ten groups of two long
duration impulses of 2.22 ms and a charge content of 2.2 C.
Figure 1 shows the long duration impulse waveform applied on each of the MOV
discs.
Figure 1: Wave shape of long duration impulse wave form
Test Results: Ten of (10) MOV discs successfully withstood the 20 shot
durability test performed at 2.2 coulomb charge. Per section 8.15.3, the MOV
discs were examined and found to have no physical damage. Additionally, each
MOV disc was tested for 10 kA IR and 7ma Uref reference voltage. The results of
this testing is summarized in Table 1.
Sample
No
1
2
3
4
5
6
7
8
9
10
10 kA IR
Before
(kVc)
16.12
16.12
16.12
16.07
16.08
16.09
16.06
16.08
16.09
16.09
10 kA
IR
After
(kVc)
16.19
16.16
16.19
16.12
16.14
16.12
16.11
16.11
16.14
16.13
%
Change
+0.43
+0.25
+0.43
+0.31
+0.37
+0.19
+0.31
+0.19
+0.31
+0.25
Vref @
7 mA
Before
(kVc)
9.82
9.82
9.84
9.80
9.80
9.76
9.77
9.76
9.77
Vref @
7 mA
After
(kVc)
9.93
9.94
9.97
9.92
9.91
9.87
9.89
9.88
9.88
9.91
%
Change
9.78
Table 1: Before and After Discharge Voltages and Reference Voltages
TD 01 26 E08
+1.1
+1.2
+1.3
+1.2
+1.1
+1.1
+1.2
+1.2
+1.1
+1.3
2
Conclusion: The test was successfully completed as per the IEEE C.62.11-2012
requirements. The change in discharge voltage and reference voltage were well
within 5% of initial value. The claimed single-impulse withstand rating for the
Type PVI-LP arrester is 2.0 C.
TD 01 26 E08
3
TYPE TEST REPORT No. TD 01 26 E09
DUTY CYCLE TEST
Type PVI-LP Intermediate Class Arrester
CERTIFICATION
This is to certify that the duty cycle design test has been successfully performed on the
Ohio Brass Type PVI-LP Intermediate Class surge arrester per Clause 8.16 of IEEE
C62.11-2012 Standard.
Saroni Brahma
Design Engineer
07/03/2014
Attachments
Dennis W. Lenk P.E.
Principal Engineer
DESIGN TEST REPORT
PVI-LP Intermediate Class Surge Arrester
Duty Cycle Test
INTRODUCTION: Duty cycle tests were performed per clause 8.16 of IEEE Standard
C62.11-2012. Tests were performed on three PVI-LP prorated sections assembled per
clause 8.16.1 requirements.
TEST PROCEDURE: The room temperature prorated test section was energized at its
rated voltage and subjected to twenty 10 kA, 8/20 μs discharges spaced at 1 minute
intervals. Following the twentieth impulse, the test section was placed in an oven at
64°C. After reaching 64°C, the sample was subjected to two additional 10 kA, 8/20 μs
discharges. Within 5 minutes after the second high current discharge, the sample was
energized at the prorated section recovery voltage. Watts loss was monitored over a 30
minute period demonstrating thermal stability.
TEST RESULTS: Tests were successfully completed on three prorated sections. The
following data summarizes the results of tests performed on prorated section #1.
The following data summarizes the results of the duty cycle test performed on prorated
section #1. Figures 1 and 2 show the 1st and 20th shot performed during the rated voltage
portion of the duty cycle test.
Figure 1
1st Shot @ Rated Voltage
TD 01 26 E09
2
Figure 2
20 Shot @ Rated Voltage
th
Figure 3 shows the oscillogram for the 2nd 10 kA impulse applied to the previously
preheated prorated section #1 during the recovery portion of the duty cycle test.
Figure 3
2 10 kA Discharge Prior to Recovery
nd
TD 01 26 E09
3
Figures 4 and 5 show oscillograms of the prorated section #1 grading current through the
test section at time zero and 30 minutes after application of recovery voltage,
demonstrating thermal recovery has occurred.
Figure 4
Recovery @ Time = 0 Minutes
Figure 5
Recovery @ Time = 30 Minutes
TD 01 26 E09
4
Table #1 summarizes the results of the duty cycle test performed on the three test
sections.
Table 1
Shot No.
Section #1 Watts
Section #2 Watts
Section #3 Watts
1
29.26
24.68
27.02
2
31.71
27.41
27.99
3
32.73
32.82
31.30
4
34.09
37.21
35.58
5
33.78
37.82
36.92
6
35.04
41.57
38.33
7
36.37
37.58
40.53
8
36.16
38.14
39.01
9
38.06
38.55
40.25
10
38.54
39.92
42.96
11
40.92
39.92
45.37
12
44.86
43.46
44.38
13
46.49
40.68
50.56
14
48.94
43.40
51.64
15
57.08
48.01
55.37
16
61.31
55.75
58.60
17
67.63
62.55
67.71
18
77.70
65.55
76.47
19
92.38
75.24
81.44
20
99.58
88.81
98.09
Shot No.
Section #1 Watts
Section #2 Watts
Section #3 Watts
21
3.69
3.86
3.68
22
4.46
4.93
4.53
Samples Preheated to 64 Deg C.
Within 100 msec, Recovery Voltage Applied
Elapsed Time minutes
Section #1 Watts
Section #2 Watts
Section #3 Watts
0:00:00
4.15
4.74
4.31
0:00:30
3.56
3.56
3.53
0:01:00
3.35
3.32
3.37
0:02:00
3.15
3.16
3.12
0:05:00
2.87
2.90
2.91
0:10:00
2.67
2.62
2.68
0:20:00
2.27
2.29
2.31
0:30:00
2.09
2.05
2.16
Prior to and after the duty cycle test, the 10 kA, 8/20 μs discharge voltage was measured
on the three prorated sections. Table 2 summarizes this test data.
TD 01 26 E09
5
Table 1
Section #
1
2
3
10 kA IR kVc (Before)
32.557
32.557
32.557
10 kA IR kVc (After)
32.611
32.638
32.665
10 kA IR % Change
0.2%
0.3%
0.3%
CONCLUSION: The Type PVI-LP prorated test samples successfully completed Duty
Cycle testing and demonstrated thermal stability during the recovery test. The 10 kA
discharge voltage increased 0.2-0.3%, less than the allowed 10% limit specified in
Section 8.16.4 of the IEEE C62.11-2012 standard. Disassembly revealed no evidence of
physical damage to the test samples. The Type PVI-LP arrester successfully met the
Intermediate Class arrester Duty Cycle requirements.
TD 01 26 E09
6
IEEE Design Test Report
Report No. TD 01 26 E10
Type PVI-LP Intermediate Class
Surge Arrester
Temporary Overvoltage Test
CERTIFICATION
This is to certify that the Temporary Overvoltage test has been successfully
performed on Ohio Brass Type PVI-LP Intermediate Class surge arrester.
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Temporary Overvoltage Test
INTRODUCTION: Temporary over-voltage tests were performed per clause 8.17 of
IEEE Standard C62.11-2012. Tests were performed per Intermediate Class arrester
requirements using four prorated test sections
TEST SAMPLE: Nominally 6 and 12 kV rated prorated sections were used to facilitate
testing across the designated a) thru f) time ranges. The short time data points were
generated using 6 kV rated sections while the longer time data points used 12 kV rated
sections. As both sizes of arresters were thermally equivalent prorated sections, the
results of these tests apply to all PVI-LP arrester ratings.
TEST PROCEDURE: Testing was performed per procedures specified in clause 8.17.3.
The No Prior Duty testing conformed to clause 8.17.3.1 while the Prior duty testing
conformed to clause 8.17.3.2. All prorated test sections were preheated in an oven to 64
degrees C. prior to testing.
For the Prior Duty test, energy was inputted via two long duration impulses spaced 1
minute apart. Within 100 milliseconds of the 2nd discharge, the targeted temporary
overvoltage was applied to the test section, followed immediately by recovery voltage.
The recovery voltage was applied by 30 minutes, monitoring sample watts loss to verify
the test section remained thermally stable. The total energy inputted by the two long
duration impulses exceeded 6 kJ per kV MCOV, as claimed in the switching surge
energy rating test.
TEST RESULTS: Table 1 summarizes the results of the tests successfully performed on
the No Prior Duty and Prior Duty Test Sections.
Time-Seconds
.01
.1
1
10
100
1000
10000
Table 1
Prior Duty TOV Per Unit
Times MCOV
1.535
1.450
1.365
1.295
1.240
1.205
1.195
No Prior Duty TOV Per Unit
Times MCOV
1.560
1.480
1.400
1.340
1.282
1.245
1.230
After successfully passing TOV duty tests, the 10 kA 8/20 discharge was measured and
the results compared with test values measured prior to TOV testing. The results of the 10
kA discharge testing for each section is summarized in table 2.
TD 01 26 E10
2
Table 2
Sample No.
2
4
9
14
15
16
17
19
22
10 kA IR Before
32.530
32.665
32.530
32.665
32.665
32.611
16.575
16.601
16.548
10 kA IR After
32.907
32.826
32.853
32.799
32.826
62.530
16.521
16.601
16.548
10 kA IR % Change
1.2
0.5
1.0
0.4
0.5
-0.2
-0.3
0.0
0.0
Figure 1 shows the plotted TOV capability curve data points, including actual test data
points verified by laboratory testing.
Figure 1
TD 01 26 E10
3
Figure 2 shows the plotted TOV capability curves for the No Prior Duty and Prior Duty
TOV Curves. The Prior Duty testing was performed in compliance with the Class C
Energy rating confirmed in the switching surge energy rating test.
Figure 2
CONCLUSION: Tests were successfully completed per Clause 8.17 of IEEE C62.112012 Standard. For both the No prior Duty and Prior Duty tests, each sample
demonstrated thermal stability after TOV exposure. Residual voltage at 10 kA measured
prior to and after the TOV test series changed much less than the allowed 10%. There
was no evidence of physical damage to the test sections, validating the PVI-LP arrester
TOV capability claims.
TD 01 26 E10
4
TYPE TEST REPORT No. TD 01 26 E11
SHORT CIRCUIT TEST
PVI-LP Intermediate Class Arrester
CERTIFICATION
This is to certify that the short circuit design test has been successfully performed on
Ohio Brass Type PVI-LP Intermediate Class surge arrester.
Saroni Brahma
Design Engineer
07/03/2014
Attachments
Dennis W. Lenk P.E.
Principal Engineer
DESIGN TEST REPORT
PVI-LP Intermediate Class Surge Arrester
Short-Circuit Test
OBJECTIVE: Short circuit tests were performed on the Type PVI-LP Intermediate
Class arrester per section 8.18 of IEEE Standard C62.11-2012. Tests were performed in
compliance with Table 14 of the referenced standard. Additional short circuit tests were
performed as shown.
TEST SAMPLE: Fault current tests were performed on the longest mechanical section,
as required in Section 8.18.1 of the standard. As required in Section 8.18.1, two test
samples were tested (one at 40 kArms/12 cycle high current and one at 600 amp/ 1
second) using the specified 2-source failure method. One additional 2-source and two
additional test samples for the high current test were assembled with a fuse wire oriented
axially between the mov disc stack and the fiberglass-epoxy wrap. The fuse wire samples
were subjected to the full offset current test. In addition, two samples were tested per the
2-source method at 20 kArms. These samples were failed using the specified 2-source
failure mode procedure.
TEST RESULTS: The following table summarizes the results these tests which
validated the claimed maximum 40 kA rms symmetrical, 12 cycle fault current withstand
capability of this design, with an applied ratio of 1.55 between total asymmetrical to
symmetrical rms currents. This corresponds to a 2.6 ratio, in the first half loop of fault
current, between the crest asymmetrical to rms symmetrical current, i.e., full offset. In
addition to testing at the claimed maximum capability, tests were also performed, using
the 2-source procedure, at half the claimed capability and at 600 amps as specified in
Table 14 of the standard.
All tests were performed at full voltage. Therefore, the prospective fault current, as
measured during the bolted fault test on the generator, is the claimable fault current
capability of the design.
Calibration Test
Sample
#
1
2
3
4
TD 01 26 E11
41.0 kA rms Symmetrical
Failure
Mode
Fuse Wire
Fuse Wire
2-Source
2-Source
Minimum Test
Duration-seconds
.21
.21
.21
.21
107 kA peak Asymmetrical
Condition of Module/Polymer
Housing After Test
Module Intact/Housing Separated
Module Intact/Housing Separated
Module Intact/Hsg Torn but in Place
Module Intact/Hsg Torn but in Place
2
Calibration Test
Sample
#
5
6
Failure
Mode
2-Source
2-Source
Calibration Test
Sample
#
7
8
19.9 kA rms Symmetrical
Minimum Test
Duration-seconds
.2
.2
600 A rms Symmetrical
Failure
Mode
2-Source
2-Source
Minimum Test
Duration-seconds
1.0
1.0
No Asymmetrical Requirement
Condition of Module/Polymer
Housing After Test
Module Intact/Hsg Torn but in Place
Module Intact/Hsg Torn but in Place
No Asymmetrical Requirement
Condition of Module/Polymer
Housing After Test
Module Intact/Hsg Torn but in Place
Module Intact/Hsg Torn but in Place
CONCLUSION: The eight test arresters assembled with the longest mechanical unit met
the test evaluation criteria as specified in Section 8.18.3 of IEEE C62.11-2012 Standard.
In all tests, the arrester module remained intact on the insulating support bracket after the
completion of each test. The flexible polymer housing wall section split, as intended, on
all samples to allow venting of internal arcing gases to the outside of the arrester. In all
cases, flames associated with the fault current test extinguished immediately after
completion of the test, well within the allowed 2 minute duration. These tests have
demonstrated the capability of the PVI-LP arrester design to discharge a maximum
claimable 40 kA rms symmetrical fault current using the test procedure defined in Section
8.18 of IEEE C62.11-2012 Standard.
TD 01 26 E11
3
IEEE Design Test Report
Report No. TD 01 26 E12
Type PVI-LP Intermediate Class
Surge Arrester
MDCL and Moisture Ingress Test
CERTIFICATION
This is to certify that the MDCL and Moisture Ingress design test has been
successfully performed on Ohio Brass Type PVI-LP Intermediate Class surge
arrester.
This report summarizes the results of design tests made on the Type PVI-LP
Intermediate Class arrester design. Tests were performed in accordance with
procedures of IEEE Std C62.11-2012, “IEEE Standard for Metal-Oxide Surge
Arresters for AC Power Circuits (> 1 kV).”
To the best of our knowledge and within the usual limits of testing practice, tests
performed on these arresters demonstrate compliance with the relevant clauses
of the referenced standard.
Dennis Lenk
Principal Engineer
Saroni Brahma
Design Engineer
Date: 07/03/2014
Design Test Report
PVI-LP Intermediate Class Surge Arrester
Title: Maximum design cantilever load (MDCL) and moisture ingress test for
polymer-housed arresters
INTRODUCTION: Tests were performed in accordance with section 8.22 of IEEE
C62.11-2012 Standard. The purpose of this test was to verify the seal integrity of the
polymer-housed PVI-LP arrester after being subjected to a terminal torque and
thermomechanical test, followed by the boiling water immersion test.
TEST SAMPLE: A 19.5 kV MCOV arrester was assembled for this test.
TEST PROCEDURE: The test arrester was subjected to PD, watts loss, and discharge
voltage tests prior to the bending moment and boiling water immersion test. The
mechanical portion of the test consisted of first applying a 40 ft-lb torque to the arrester
end terminals for 30 second duration. The test arrester was then placed inside a thermal
cycling oven and mechanically loaded to its 1,600 in-lb continuous cantilever rating. The
load application and test temperature cycles are shown on Figure 1
Figure 1
After completion of the mechanically loading portion of the test procedure, the water
immersion portion of the bending moment test was performed per section 8.22.3.3 and
consists of placing the mechanically stressed arrester into a boiling salt water bath for 42
hours, after which the same is cooled to room temperature and electrical tests are
repeated.
TD 01 26 E12
2
TEST RESULTS: Subsequent to the bending moment test, the test arrester was
subjected to 42 hours immersion in the specified salt water bath. After removal from the
bath, the arrester was electrically tested. The following table shows the results of the final
electrical testing, compared with initial measurements.
Sample
No.
Initial
Watts @
Uc
Final
Watts @
Uc
Initial PD
@ 1.05
times Uc
(pC)
Final PD
@ 1.05
times Uc
(pC
1
1.04
1.20
<1
<1
Initial 10
kA
Residual
Voltage
kVc
55.8
Final 10
kA
Residual
Voltage
kVc
55.9
CONCLUSION: Visual inspection confirmed that there was no damage to the arrester as
a result of the 1,600 in-lb thermomechanical conditioning, followed by the water
immersion test. Electrical tests performed before and after testing also confirmed the
electrical integrity of the test arrester. The 15% watts loss increase was below the allowed
20% limit. Partial discharge was unchanged at less than 1 pC, below the allowed 10 pC
limit. The measured 10 kA residual voltage was almost unchanged, below the allowed
5% limit. Therefore, the Type PVI-LP base mounted arrester design successfully passed
the MDCL and moisture ingress test, as defined in IEEE C62.11-2012 standard.
TD 01 26 E12
3