The Ohio Brass Company · 2018. 11. 1. · 213274 30 24.4 405 450 89.3 127 230 78.6 85 213279 36 29 450 527 107.2 152 250 94.3 110 CONCLUSION All housings meet or exceed the required

Report Number: TD 01 056 E11

Page 1 of 41

IEC Type Test Report

Report No. TD 01 056 E00

PDV 65 Polymer Housed Arrester

Class Distribution Medium (DM)

This report presents the type tests performed on the PDV 65 Polymer Housed Class DM Arrester design. Tests were performed in accordance with procedures of IEC 60099-4, Ed. 3.0, 2014-06, “Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” Distribution Class DM arresters are assembled at ISO 9001:2008 certified Hubbell locations. 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.

Fayaz Khatri

Dennis W. Lenk Fayaz Khatri Principal Engineer Design Engineering Supervisor Date: 4/01/2016

Separate reports provide details of each test, according to the following table:

Report No. Description Clause Issue date

TD 01 056 E01 Insulation Withstand Tests 10.8.2 4/01/2016

TD 01 056 E02 Residual Voltage 10.8.3 4/01/2016

TD 01 056 E03 Long Term Stability under Continuous Voltage 10.8.4 4/01/2016

TD 01 056 E04 Repetitive Charge transfer Rating Qrs 10.8.5 4/01/2016

TD 01 056 E05 Heat Dissipation Behavior Verification 10.8.6 4/01/2016

TD 01 056 E06 Operating Duty test 10.8.7 4/01/2016

TD 01 056 E07 Power Frequency Voltage-Versus-Time Test 10.8.8 4/01/2016

TD 01 056 E08 Short Circuit Tests 10.8.10 4/01/2016

TD 01 056 E09 Bending Moment 10.8.11 4/01/2016

TD 01 056 E10 Disconnector Test 8.9.3, 8.11.6 4/01/2016

TD 01 056 E11 Salt Fog Test 10.8.17.2 4/01/2016

TD 01 056 E12 UV Light Test 10.8.17.3 4/01/2016


Page 2 of 41


Report Number: TD 01 056 E01 PDV-65 Optima IEC Distribution Arrester DM Designation

5 kA Discharge Current

Insulation Withstand Tests IEC Clause 10.8.2

This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur rated 3 to 36 kV. Tests were performed in accordance with procedures of IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” 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.

Fayaz Khatri

Dennis W. Lenk Fayaz Khatri Principal Engineer Design Engineering Supervisor


Page 3 of 41


Insulation Withstand Tests EC Clause 10.8.2

INTRODUCTION The voltage withstand tests demonstrate the voltage withstand capability of the external insulation of the arrester housing. PROCEDURE Tests were performed in the conditions and with the test voltage shown in Table 1. The outside surface of the insulating parts was carefully cleaned and the internal parts removed per clause 8.2.1 of IEC 60099-4, Ed. 3.0, 2014-06, International Standard. During the lightning impulse voltage test, the arrester was subjected to a standard lightning impulse voltage dry test according to IEC 60060-1. Fifteen consecutive impulses at the test voltage value were applied for each polarity. The test voltage shall be at least 1.3 times the maximum residual voltage of the arrester at nominal discharge current. During the power-frequency voltage test, the distribution class arresters shall withstand a power-frequency voltage with a peak value equal to the lightning impulse protection level multiplied by 0.88 for a duration of 1 minute. The housings of arresters, intended for outdoor use, were tested in wet conditions.


Page 4 of 41

IEC Type Test Report Insulation Withstand Tests

EC Clause 10.8.2 RESULTS The following tables list the strike distance and height for the PDV 65 distribution arrester DM designation without and with the insulating support bracket. The tables also summarize the 1 minute wet 60 Hz and 1.2/50 impulse withstand requirements and claimed capability for each arrester rating. Table 1 applies to the arrester alone, without insulating bracket. Table 2 applies to arresters mounted on an insulating support bracket.

Table 1: PDV 65 Distribution Arrester DM Designation Insulation Withstand Results Without Insulating Support Bracket (Arrester Only)

Catalog Number

Uc (kVrms)

Ur

Rated Voltage (kVrms)

Arrester Strike

Distance (mm)

Total Height Without Bracket Imperial

Hardware (mm)

8/20 5 kA Discharge

(kVc)

Required 1.2/50

Impulse Withstand

(kVc)

Actual 1.2/50

Impulse Withstand

(kVc)

Required 1 Minute Wet

Power Frequency Withstand

(kVc)

Actual 1 Minute

Wet Power

Frequency Withstand

(kVc)

217253 3 2.55 155 218 9.2 13.1 80 8.1 34

217255 6 5.1 155 218 18.5 26.3 80 16.3 34

217258 9 7.65 155 218 26.8 38.1 80 23.6 34

217259 10 8.4 155 218 29.8 42.3 80 26.2 34

217560 12 10.2 155 218 35.7 50.7 80 31.4 34

213263 15 12.7 245 294 45.3 64.3 140 39.9 50

213265 18 15.3 245 294 53.6 76.1 140 47.2 50

213267 21 17 245 294 60.3 85.6 140 53.1 50

217570 24 19.5 285 355 71.4 101 170 62.8 65

213272 27 22 360 432 80.4 114 220 70.8 80

213274 30 24.4 360 432 89.3 127 220 78.6 80

213279 36 29 405 508 107.2 152 250 94.3 100


Page 5 of 41

IEC Type Test Report Insulation Withstand Tests

EC Clause 10.8.2

Table 2: PDV 65 Distribution Arrester DM Designation Insulation Withstand With Insulating Support Bracket

Catalog Number

Uc (kVrms)

Ur

Rated Voltage (kVrms)

Arrester Strike

Distance (mm)

Total Height

Without Bracket Imperial

Hardware (mm)

8/20 5 kA Discharge

(kVc)

Required 1.2/50

Impulse Withstand

(kVc)

Actual 1.2/50

Impulse Withstand

(kVc)

Required 1 Minute

Wet Power

Frequency Withstand

(kVc)

Actual 1 Minute

Wet Power

Frequency Withstand

(kVc)

217253 3 2.55 200 236 9.2 13.1 125 8.1 38

217255 6 5.1 200 236 18.5 26.3 125 16.3 38

217258 9 7.65 200 236 26.8 38.1 125 23.6 38

217259 10 8.4 200 236 29.8 42.3 125 26.2 38

217560 12 10.2 200 236 35.7 50.7 125 31.4 38

213263 15 12.7 290 312 45.3 64.3 175 39.9 60

213265 18 15.3 290 312 53.6 76.1 175 47.2 60

213267 21 17 290 312 60.3 85.6 175 53.1 60

217570 24 19.5 330 373 71.4 101 195 62.8 70

213272 27 22 405 450 80.4 114 230 70.8 85

213274 30 24.4 405 450 89.3 127 230 78.6 85

213279 36 29 450 527 107.2 152 250 94.3 110

CONCLUSION All housings meet or exceed the required levels of voltage clause 8.2 of IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” The lightning impulse voltage test was considered successful per clause 8.2.6 IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” The clause states the arrester shall be considered to have passed the test if no internal disruptive discharges occur and if the number of the external disruptive discharges does not exceed two in each series of 15 impulses. No internal discharges occurred. No external disruptive discharges occurred. All required values were met or exceeded. The power frequency voltage test was considered successful per clause 8.2.8 of IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” No internal discharges occurred. No external disruptive discharges occurred. All required values were met or exceeded.


Page 6 of 41

IEC Type Test Report Report Number: TD 01 056 E02

PDV-65 Optima IEC Distribution Arrester DM Designation 5 kA Discharge Current

Residual Voltage Test

IEC Clause: 10.8.3


Fayaz Khatri



Page 7 of 41

IEC Type Test Report Residual Voltage Tests

IEC Clause 10.8.3

INTRODUCTION This test is to determine the discharge voltages at predetermined currents. Residual voltage tests were performed on three 29mm x 42.8 mm MOV discs. PROCEDURE The following tests were performed on each sample. Each sample was allowed to cool to ambient temperature between discharges. 1. Steep Current Impulse Residual Voltage Test: 1/2 µs, 5 kA; 2. Lightning Impulse Residual Voltage Test: 8/20 µs, 1.5, 3, 5, 10, 20, 40 kA; 3. Switching Impulse Residual Voltage Test: 30-100/60-200 µs and 500 A. RESULTS Each of the three test samples was subjected to a 5 kA, 1/2 µs steep current impulse with and without an aluminum disc with the same geometry of the MOV disc. The difference in the residual voltages is the inductive drop across the MOV disc. Figures 1a and 1b show the oscillograms of the measured FOW residual voltage discharges of Sample 2 without and with an aluminum spacer, respectively.

Figure 1a. Sample 2, 5.036 kA, 18.836 kV w/o aluminum spacer.


Page 8 of 41


IEC Clause 10.8.3

Figure 1b. Sample 2, 5.059 kA, 18.885 kV with aluminum spacer. Each sample was then subjected to 1.5, 3, 5, 10 and 20 kA lightning surge impulses. Figures 2 thru 7 show the oscillogram for each of the referenced 8/20 discharge current levels on Sample 2.

Figure 2: Sample 2 , 1.513 kA, 15.108 kV.


Page 9 of 41


IEC Clause 10.8.3

Figure 3. Sample 2 , 3.044 kA, 16.179 kV.



Page 10 of 41


IEC Clause 10.8.3




Page 11 of 41


IEC Clause 10.8.3

Figure 7. Sample 2 , 39.906 kA, 27.912kV. Each sample was then subjected to 500 A switching surge impulse. Figure 8 shows the oscillogram of the switching surge discharge of Sample 2.


Page 12 of 41


IEC Clause 10.8.3

Figure 8. Sample 2, 507.7 A, 13.608 kV.

Table 1 shows the 5 kA IRs of the steep front wave measured on the three test samples with and without the aluminum disc. Per section 8.3.2 of IEC 60099-4, Ed. 3.0, 2014 Standard, Since measured spacer inductive drop is less than two percent of the MOV disc recorded FOW residual voltage, the inductive drop of the MOV disc can be disregarded

Table 1: Measurement of Inductive effect on MOV discs

Sample Number

I (kA) IR (KVpk) with

Al disc IR (KVpk) w/o

Al disc

Al disc L(di/dt)

effect (kV)

Recorded MOV disc FOW voltage drop

(kV)

1

5

18.918 18.918 0 18.918

2 18.885 18.836 .049 18.885

3 18.902 18.853 .049 18.902

Table 2 summarizes the design factors used to extrapolate the 1.5 through 40 kA 8/20 residual voltage, the 500 amp switching surge residual voltage, and MOV disc .5 microsecond FOW residual voltage. The highest factor for each wave shape is shown bolded and is multiplied by the 5 kA residual voltage of each rating to develop the family of residual voltage values. Table 3 summarizes the residual voltage values measured and claimed for each arrester rating.


Page 13 of 41


IEC Clause 10.8.3

Table 2: Residual Voltage Test.

Impulse Current

(kA)

Wave Shape

(µs)

Discharge Voltage (kVpk) Discharge Voltage Ratio (IR/10kV IR)

Sample 1 Sample 2 Sample 3 Sample 1 Sample 2 Sample 3

0.5 43/91 13.608 13.608 13.581 0.788 0.786 0.784

1.5 8/20 15.215 15.108 15.161 0.881 0.873 0.875

3 8/20 16.206 16.179 16.179 0.938 0.935 0.934

5 8/20 17.277 17.304 17.331 1.000 1.000 1.000

10 8/20 19.447 19.367 19.447 1.126 1.119 1.122

20 8/20 22.474 22.447 22.34 1.301 1.297 1.289

40 8/20 28.046 27.912 28.18 1.623 1.613 1.626

10

1/2 (w/o inductive effect)

18.918 18.885 18.902 1.095 1.091 1.091


Page 14 of 41


IEC Clause 10.8.3

Table 3: Summary of Arrester Discharge Voltages

Uc Ur

IR Factors

0.788 0.881 0.938 1 1.126 1.301 1.626 1.095

5

Wave 44/98 8/20 8/20 8/20 8/20 8/20 8/20 1/2

Unit Ht

5 kA Induct Drop

Total FOW

I (kA) 0.5 1.5 3 5 10 20 40 5 m kV 5

2.55 3 Measured

IR 6.93 7.75 8.25 8.80 9.91 11.45 14.31 9.64

0.076 0.38 10.0

Catalog

IR 7.3 8.1 8.7 9.2 10.4 12.0 15.0 10.1

0.076 0.38 10.5

5.1 6 Measured

IR 13.87 15.51 16.51 17.60 19.82 22.90 28.62 19.27

0.096 0.48 19.8

Catalog

IR 14.6 16.3 17.3 18.5 20.8 24.0 30.0 20.2

0.096 0.48 20.7

7.65 9 Measured

IR 20.80 23.26 24.76 26.40 29.73 34.35 42.93 28.91

0.124 0.62 29.5

Catalog

IR 21.1 23.6 25.1 26.8 30.2 34.9 43.6 29.3

0.124 0.62 30.0

8.4 10 Measured

IR 23.14 25.87 27.54 29.36 33.06 38.20 47.74 32.15

0.124 0.62 32.8

Catalog

IR 23.5 26.3 28.0 29.8 33.6 38.8 48.5 32.6

0.124 0.62 33.3

10.2 12 Measured

IR 27.73 31.00 33.01 35.19 39.62 45.78 57.22 38.53

0.139 0.695 39.2

Catalog

IR 28.1 31.5 33.5 35.7 40.2 46.5 58.1 39.1

0.139 0.695 39.8

12.7 15 Measured

IR 35.18 39.33 41.87 44.64 50.26 58.08 72.58 48.88

0.198 0.99 49.9

Catalog

IR 35.7 39.9 42.5 45.3 51.0 58.9 73.7 49.6

0.198 0.99 50.6

15.3 18 Measured

IR 41.61 46.52 49.53 52.80 59.45 68.69 85.85 57.82

0.198 0.99 58.8

Catalog

IR 42.2 47.2 50.3 53.6 60.3 69.7 87.1 58.7

0.198 0.99 59.7

17 21 Measured

IR 46.85 52.38 55.76 59.45 66.94 77.34 96.67 65.10

0.218 1.09 66.2

Catalog

IR 47.5 53.2 56.6 60.3 67.9 78.5 98.1 66.1

0.218 1.09 67.2

19.5 24 Measured

IR 55.46 62.00 66.02 70.38 79.25 91.56 114.44 77.07

0.292 1.46 78.5

Catalog

IR 56.3 62.9 67.0 71.4 80.4 92.9 116.2 78.2

0.292 1.46 79.7

22 27 Measured

IR 62.41 69.78 74.29 79.20 89.18 103.04 128.78 86.72

0.32 1.6 88.3

Catalog

IR 63.3 70.8 75.4 80.4 90.5 104.6 130.7 88.0

0.32 1.6 89.6

24.4 30 Measured

IR 69.34 77.52 82.53 87.99 99.08 114.47 143.07 96.35

0.332 1.66 98.0

Catalog

IR 70.4 78.7 83.8 89.3 100.6 116.2 145.2 97.8

0.332 1.66 99.5

29 36 Measured

IR 83.21 93.03 99.05 105.60 118.91 137.39 171.71 115.63

0.393 1.965 117.6

Catalog

IR 84.5 94.4 100.5 107.2 120.7 139.4 174.3 117.4

0.393 1.965 119.3


Page 15 of 41


IEC Clause 10.8.3 CONCLUSION As summarized on Table 3, the residual voltage calculated (based on the prorated test sample data) was less than the maximum declared catalog levels for each rated arrester.


Page 16 of 41



Long Term Stability under Continuous Operating Voltage

IEC Clause 10.8.4 This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur rated 3 to 36 kV. Tests were performed in accordance with procedures of IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” 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.

Fayaz Khatri



Page 17 of 41


Long Term Stability under Continuous Operating Voltage IEC Clause 10.8.4

INTRODUCTION The test is performed to demonstrate the long term stability of a surge arrester under continuous operating voltage. PROCEDURE Long term stability tests were performed on six arrester samples. All samples contained 29mm MOV discs. Three samples contained 21mm long MOV discs and three samples contained 42mm long MOV discs. Each sample also consisted of a spring, end terminals, barrier film and fiberglass/epoxy wrap using standard module construction. Tests were conducted in accordance with the requirements of Clause 10.8.4 of IEC 60099-4, Edition 3.0, 2014-06 (requiring the procedure of Clause 8.4.2 to be administered). The test samples were placed in an air oven and energized at a voltage equal to the corrected maximum continuous operating voltage, Uct, for 1000 hours. Uct is the voltage that corresponds to the maximum voltage to which an MOV disc would be subjected in a complete arrester. Non-uniform voltage distribution along the arrester length is accounted for. PDV65 arresters are designed such that the maximum voltage stress at any point along the MOV disc column is not more than 1.15 times the average stress along the column.

The temperature of the samples was maintained at 115 C 2 C for the duration of the test. Power dissipation was measured on each sample throughout the 1000 h test period. Clause 8.4.2 defines three power dissipation values:

• Pstart, measured 1 to 2 hours after the initial voltage application

• Pend, measured after 1000 hours

• Pmin, the minimum value attained during the 1000 hour test period RESULTS Table 1 summarizes the values of Pstart, Pend and Pmin for each sample.

Table 1: Power dissipation values

MOV disc diameter x

length

Power dissipation at 2 hours

Power dissipation

at 1000 hours

Minimum power

dissipation

Required ratio < 1.1

Required ratio < 1.3

Pstart (W) Pend (W) Pmin (W) Pend / Pmin Pend / Pstart

29x21 0.42 0.23 0.23 1 0.55

29x21 0.46 0.25 0.25 1 0.54

29x21 0.59 0.26 0.26 1 0.44

29x42 0.59 0.48 0.48 1 0.81

29x42 0.62 0.49 0.49 1 0.79

29x42 0.57 0.45 0.45 1 0.70

CONCLUSION Each sample demonstrated continually decreasing watts loss at Uct. The Pend/Pmin ratio was less than 1.3 and the Pend/Pstart ratio was less than 1.1. The MOV discs successfully passed the Long Term Stability under Continuous Operating Voltage test.



Page 18 of 41


PDV-65 Optima IEC Distribution Arrester DM Designation

5kA Discharge Current

Repetitive Charge Transfer Rating Qrs

IEC Clause 10.8.5

This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur Rated 3 – 36 kV. Tests were performed in accordance with procedures of IEC 60099-4, Edition 3.0, 2014-06, “Surge arresters– Part 4: Metal oxide surge arresters without gaps for a.c. systems”. 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.

Fayaz Khatri



Page 19 of 41



IEC Clause 10.8.5

INTRODUCTION

The repetitive charge transfer rating test was performed on ten MOV discs per Section 10.8.5 of the IEC 60099-4, Edition 3.0, 2014-06 standard.

PROCEDURE Test was performed on ten of the 29mm diameter MOV discs used in the PDV-65 product line. The residual voltage (5kA, 8/20μs) and the reference voltage (at 3 mA) were measured before and after the long duration impulses for evaluation. Each sample was then subjected to ten groups of two 8/20μs impulses having a charge content of 0.24 coulomb.

RESULTS

All ten out of ten MOV discs successfully passed the 20 shot durability test performed at 0.24 coulomb charge. Per section 8.5.3, the MOV discs were examined for physical damage and found to have none. Additionally, each MOV disc was tested for 5 kA residual voltage and 3 mA reference voltage. The results of this testing is summarized in Table 1.

Table 1: Residual and reference voltages before and after Qrs testing

Sample

Number

5 kA

residual

voltage

Before

(kVc)

5 kA

residual

voltage

After

(kVc)

% Change

residual

voltage

Reference

voltage

@ 3 mA

Before

(kVc)

Reference

voltage

@ 3 mA

After

(kVc)

% Change

reference

voltage

1 17.24 17.26 +0.1% 9.93 9.99 +0.6%

2 17.25 17.31 +0.3% 9.88 10.00 +1.2%

3 17.24 17.33 +0.5% 9.94 10.01 +0.7%

4 17.24 17.31 +0.4% 9.91 10.01 +1.0%

5 17.24 17.29 +0.3% 9.90 9.98 +0.8%

6 17.22 17.25 +0.2% 9.90 10.00 +1.0%

7 17.23 17.23 0.0% 9.83 9.93 +1.0%

8 17.25 17.27 +0.1% 9.92 10.02 +1.0%

9 17.24 17.25 +0.1% 9.91 9.99 +0.8%

10 17.22 17.25 +0.2% 9.91 10.00 +0.9%

The final evaluation confirming the electrical integrity of the ten tested MOV discs requires that each disc be subjected to a single 8/20μs current discharge having a magnitude greater than 0.5 kA/cm2 of disc area. For the 29mm diameter disc, each MOV disc was subjected to a single 8/20μs impulse exceeding 3.3 kA in magnitude. Table 2 below summarizes the results of this testing confirming no damage to the tested MOV discs.


Page 20 of 41



IEC Clause 10.8.5

Table 2: Final 8/20μs impulse @0.5 kA/cm2 times MOV disc area

MOV Disc # Current Magnitude kApeak Pass/Fail

1 3.40 Pass

2 3.45 Pass

3 3.41 Pass

4 3.57 Pass

5 3.40 Pass

6 3.45 Pass

7 3.49 Pass

8 3.35 Pass

9 3.51 Pass

10 3.52 Pass

CONCLUSION

The repetitive charge transfer rating test was successfully passed with 29mm MOV discs as per the IEC requirements. The change in residual voltage and reference voltage were less than 5% of initial value. The claimed

repetitive charge transfer rating (Qrs) for the Type PDV-65 Optima IEC Distribution Arrester DM is 0.2 coulomb.


Page 21 of 41


Report No.TD 01 56 E05

PDV-65 Optima IEC Distribution Arrester DM Designation

5kA Discharge Current

Thermal Equivalency Test

IEC Clause 10.8.6

This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur Rated 3 – 36 kV. Tests were performed in accordance with procedures of IEC 60099-4, Edition 3.0, 2014-06, “Surge arresters– Part 4: Metal oxide surge arresters without gaps for a.c. systems”. 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.

Fayaz Khatri



Page 22 of 41


Thermal Equivalency

IEC Clause 10.8.6

INTRODUCTION

The polymer arrester thermal equivalency tests were performed per Section 8.6 of the IEC 60099-4, Edition 3.0, 2014-06 standard. The purpose of this test is to verify that, when internally heated, the prorated sections used in Type tests of PDV65 arresters, will cool more slowly than that of a full size 21 kV rated arrester. This characterization is illustrated by comparing the thermal cooling curves and, if necessary, determining the temperature offset which will keep the prorated section equal to or more than the full size arrester.

PROCEDURE

A full size single unit 21 kV rated Type PDV65 arrester and a 12 kV and a 6 kV prorated section were heated by applying a temporary overvoltage to the test samples. Per Annex B, all samples (the arrester and the prorated sections) were energized in approximately 10 minutes to a starting temperature of 140ºC, at which time the voltage was removed. The full size arrester and the two prorated sections were instrumented with a fiber-optic sensor in the middle of the MOV disc stack. During cooling the temperature of the arrester and the test sections was monitored at 5 minute intervals to develop the cooling curve of each. As allowed in Annex B, the cooling curves for the 12 kV and 6 kV prorated sections can be heated higher to assure that, at no time during the 120 minute cooling period, do the prorated section cooling curves drop below that of the full size arrester.

CONCLUSION

The cooling curves in Figure 1 below demonstrate the thermal equivalency of the prorated sections to the full sized arrester. The adjusted temperature shown for each rated section was added to the durability tests requiring a 60ºC preheat. The cooling rate of the 12 kV prorated section is slower than that of the full size 21 kV Rated Type PDV 65 arrester and needs no additional heating. The 6 kV prorated section starting temperature for durability design testing needs to be increased 6ºC above 60ºC, prior to performing durability tests.


Page 23 of 41


Thermal Equivalency

IEC Clause 10.8.6

Figure 1. Comparison of cooling curves


Page 24 of 41

IEC Type Test Report Report Number TD 01 56 E06


Operating Duty Test IEC Clause 10.8.7


Fayaz Khatri



Page 25 of 41

IEC Type Test Report Operating Duty Test IEC Clause 10.8.7

INTRODUCTION The purpose of this test is to verify the arresters ability to thermally recover after transfer of the rated thermal charge, Qth under applied temporary overvoltage and following continuous operating conditions. PROCEDURE Tests performed in accordance with clause 10.8.7. During the test the samples were subjected to lightning impulses containing a total charge of 0.7 Coulombs. RESULTS

The three samples demonstrated thermal stability as shown in the table below.

RECOVERY Sample 1 Sample 2 Sample 3

TIME (hh:mm:ss) Watts Loss (W) Watts Loss (W) Watts Loss (W)

0:00:00 34.71 60.75 51.93

0:00:30 17.70 31.41 25.66

0:01:00 11.66 20.91 16.84

0:02:00 6.39 11.50 9.02

0:05:00 2.62 4.18 3.38

0:10:00 1.43 2.01 1.61

0:20:00 0.81 1.04 0.88

0:30:00 0.58 0.72 0.62

I

Results of the residual voltages stability testing is summarized in the table below.

SECTION RESIDUAL VOLTAGE (kV) Change

Before After

1 35.893 36.363 +1.3%

2 36.028 36.698 +1.8%

3 35.893 36.430 +1.5%

CONCLUSION All three samples met the requirements of the test with a claimable Qth rating 0.7 Coulombs. In summary the PDV65 IEC Distribution Class DM arrester passed this test.


Page 26 of 41


Report Number: TD 01 56 E07 PDV-65 Optima IEC Distribution Arrester DM Designation


Power Frequency Voltage versus Time IEC Clause 10.8.8

This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur rated 3 to 36 kV. Tests were performed in accordance with procedures of IEC Standard 60099-4, Edition 3.0, 2014-6 “Surge arresters — Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” 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.

Fayaz Khatri



Page 27 of 41

IEC Type Test Report Power Frequency Voltage versus Time

IEC Clause 10.8.8 INTRODUCTION

The purpose of this test is to prove temporary over voltage (TOV) withstand capability by demonstrating thermal recovery, and a less than 5% change in residual voltage at nominal discharge. PROCEDURE

Tests were performed per clause 10.8.8 of IEC 60099-4, Ed. 3.0, 2014-06, International Standard. RESULTS The PDV65 arresters met the requirements of this clause.

Table 1: No prior duty TOV points

No Prior Duty Points

Time (seconds) p.u. Ur

.01 1.40

.10 1.33

1 1.26

10 1.20

100 1.14

1000 1.08

Table 1 summarizes the no prior duty capability of the PDV65 as a function of time-duration of voltage. Figure 1 plots the claimed no prior duty TOV curve versus actual TOV data points.

Figure 1: No prior duty curve


Page 28 of 41


Power Frequency Voltage versus Time IEC Clause 10.8.8

Table 2: Before and after IR comparison

Sample Number

5 kA Residual Voltage (KVc) Before

5 kA Residual Voltage (KVc) After

% Change

1 18.081 18.619 +2.9%

2 18.054 18.646 +3.2%

3 36.163 36.594 +1.2%

4 36.028 36.460 +1.2%

Table 2 summarizes the pre and post-test residual voltages of each sample. The change in residual voltage was less than ±5%. After the residual voltage post check, the prorated sections were subjected to two additional impulses (3.3 kA, 8/20 µs) 50 to 60 seconds apart, as shown in Table 3. Oscillograms taken of the impulses revealed no breakdown; therefore, no mechanical damage was indicated on any of the test samples. Table 3: Summary of post-test evaluation shots

Sample No. 3.3kA IR (KVc) Shot 1 3.3kA IR (KVc) Shot 2 %

Change

1 17.678 17.731 +0.3%

2 17.731 17.920 +1.0%

3 34.644 34.778 +0.4%

4 34.913 34.980 +0.2%

CONCLUSION All test samples successfully passed the power frequency voltage versus time characteristics test per Section 10.8.8 of IEC Standard 60099-4, Ed. 3.0. For all samples, the change in 5 kA 8/20 µs residual voltage measured before and after the discharges (Table 2) was well within the limit of 5%. All samples remained physically intact with no mechanical indicated.


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IEC Type Test Report Report No. TD 01 056 E08


Short Circuit Test

IEC Clause: 10.8.10


Fayaz Khatri



Page 30 of 41

IEC Type Test Report Short Circuit Test

IEC Clause: 10.8.10 INTRODUCTION This test is conducted to show that an arrester failure is not likely to cause an explosive failure. PROCEDURE Tests were performed in accordance with requirements of clauses 10.8.10. RESULTS The following table the test results.

Calibration Test 15.0 kA Symmetrical RMS 40.0 kAc 1st Half Loop

Sample # Failure Mode Minimum Test Duration-seconds

Condition of Module/Polymer Housing After Test

1 Fuse Wire .2 Module Intact/Hsg Torn but in Place 2 Fuse Wire .2 Module Intact/Hsg Torn but in Place 3 2-Source .2 Module Intact/Hsg Torn but in Place 4 2-Source .2 Module Intact/Hsg Torn but in Place

Calibration Test 7.59 kA Symmetrical RMS No Asymmetrical Requirement



5 2-Source .2 Module Intact/Hsg Torn but in Place 6 2-Source .2 Module Intact/Hsg Torn but in Place

Calibration Test 600 Amp Symmetrical RMS No Asymmetrical Requirement



7 2-Source 1.0 Module Intact/Hsg Torn but in Place 8 2-Source 1.0 Module Intact/Hsg Torn but in Place

CONCLUSION The PDV65 IEC Distribution Class DM arrester design passed this test.


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Bending Moment

IEC Clause 10.8.11 This report presents the results of type tests made on PDV-65 Optima IEC Distribution Arrester DM Designation, Ur rated 3 to 36 kV. Tests were performed in accordance with procedures of IEC Standard 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” 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.

Fayaz Khatri



Page 32 of 41

IEC TYPE TEST REPORT Bending Moment

IEC Clause 10.8.11 INTRODUCTION The bending moment test demonstrates the ability of the arrester to withstand the manufacturer’s declared values for bending loads. PROCEDURE The bending moment test was performed on three 17 kV Uc PDV65 arresters as described in Clause 10.8.11 of IEC 60099-4, Ed. 3.0. 2014-06, for polymer housed arresters. Prior to the mechanical testing, the arresters were subjected to electrical tests to establish initial watts loss, partial discharge and residual voltage values per Clause 10.8.11.2. Tests were performed per Annex G, Figure G.6 of the standard. Samples 5 and 6 were subjected per Section 10.8.11.3.b, Step 1.1 to the specified short-term load (SSL) bending moment test. Each of the units was securely mounted to the horizontal base of the test equipment. Lateral (horizontal) loading was applied to the free end of the unit, in a direction perpendicular to the axis of the unit. The SSL was reached in approximately 50 seconds. The load was then maintained at this level for about 90 seconds. Deflection was measured prior to release of the load. After release of load, the test sample was inspected to verify that no mechanical damage had occurred, and the load-deflection curve was examined to verify that there was no discontinuity which might indicate mechanical damage. The unloaded residual deflection was measured on each sample. Sample 4 was subjected to mechanical/thermal preconditioning per Section 10.8.11.3.b, Step 1.2. The arrester terminal torque was applied to the end stud of Sample 4 for a duration of 30 seconds. The thermo-mechanical preconditioning portion of the test loads the test sample to its specified long-term load (SLL) while the arrester is being thermally cycled from -40 to +60˚C. All three samples were subjected to the water immersion test per Section 10.8.11.3.b, Step 2. Each sample was submersed in 80˚C salt water for 168 hours after which the samples were electrically evaluated. At the conclusion of the water immersion test, electrical tests were repeated on each sample (per Section 10.8.11.4). The increase in watts loss cannot change more than 20% and the internal partial discharge cannot exceed 10 pC. In addition, residual voltage must maintain within 5% and the difference in Uref measurements does not differ more than 2%. A visual inspection was made to verify that no mechanical damage had occurred. RESULTS Preliminary electrical tests were performed on the three PDV65 arresters. Table 1 summarizes the results of those preliminary electrical tests.

Table 1: Preliminary electrical test results

Test Parameter Sample 4 Sample 5 Sample 6

Initial Watts Loss at Uc (W) 0.168 0.158 0.162

Residual Voltage at 1.5 kA (kVpeak) 51.4 51.46 51.33

Partial Discharge (pC) at 1.05*Uc 0 0 0

Samples 5 and 6 were rigidly base mounted and loaded within 30 to 90 seconds to an SSL of 68 Nm (600 in-lb). The load was maintained for 60 to 90 seconds and subsequently released. The maximum recorded top end deflection under load was 6.6 mm (0.26”) while the maximum recorded residual deflection was 0.8 mm (0.03”). Sample 4 was subjected to mechanical/thermal preconditioning. A torque of 27 Nm (20 ft-lbs) was applied to the top end stud of Sample 4. The test sample was next placed inside a thermal cycling oven with the arrester loaded to an SLL of 34 Nm (300 in-lb). At the completion of the specified mechanical loading, all three samples were placed into 80˚C salt water for 168 hours. After 168 hours exposure, the water bath temperature was reduced to 50˚C. After stabilizing in the 50˚C water bath, the test samples were dried off and 60 Hz electrical tests were repeated. Table 2 summarizes the results of electrical tests performed on the test samples after the water immersion test.


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Table 2: Watts loss and PD results


Final Watts Loss at Uc (W) 0.178 0.176 0.173

Watts Loss Increase (%) +6.0% +11.3% +6.8%

Final Partial Discharge (pC) at 1.05*Uc 0 0 0

Finally, each sample was subjected to two additional 1.5 kA residual voltage surges spaced 1 minute apart. Close examination of oscillograms showed the traces to be smooth and less than 1% apart, confirming the integrity of each test sample. The percent change for residual voltage and Uref are provided in Table 4.

Table 3: Uref and residual voltage measurements

Test Step Test Description Sample 4 Sample 5 Sample 6

1 3 mA Uref (kVpeak) 33.46 33.33 33.19

2 8/20 1.5 kA Residual Voltage (kVpeak) 51.40 51.46 51.33

3 8/20 1.5 kA Residual Voltage (kVpeak) 51.83 51.84 51.52

4 3 mA Uref (kVpeak) 33.34 33.27 33.08

Table 4: Percent change for residual voltage and Uref measurements


Change in Residual Voltage (%) 0.83 0.74 0.37

Change in Uref (%) -0.36 -0.18 -0.33

CONCLUSION Three Type PDV65 17 kV Uc arresters were subjected to bending moment tests as defined in Clause 10.8.11 of IEC 60099-4 Ed 3.0, 2014-06. PD levels were confirmed to be below the allowed 10 pC. The change in watts loss was below the allowed 20% change. 1.5 kA residual voltage and Uref measurements were within 5% and 2%, respectively. PDV65 Class DM arresters successfully passed SSL testing at 68 Nm (600 in-lb) and SLL testing was successfully completed at 34 Nm (300 in-lb).


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Disconnector Test

IEC Clause 8.9.2, 8.9.3, 8.9.5

Insulating Bracket Test IEC Clause 8.11.6


Fayaz Khatri



Page 35 of 41

IEC Type Test Report Disconnector Test

IEC Clauses 8.9.2, 8.9.3, 8.9.5

Insulating Support Bracket IEC Clause 8.11.6

INTRODUCTION The ground lead disconnector is an integral part of the arrester’s insulating base bracket. The following required tests were performed to guarantee the claimed performance characteristics of both the ground lead disconnector and insulating support. PROCEDURE Durability tests were successfully performed per Clause 8.9.2.2 (Charge Transfer) and 8.9.2.3 (Operating Duty) test procedures on disconnectors with no detonations occurring. Detonation tests were successfully performed on (5) disconnectors per clause 8.9.3. Temperature cycling and seal pumping tests were successfully performed on (10) disconnectors per clause 8.9.5 test procedure. Per clause 8.11.6, three samples of each of the three insulating bracket sizes were successfully subjected to a cantilever loading exceeding its arrester’s claimed SSL loading. RESULTS Test samples successfully withstood the required charge transfer and operating duty testing without detonation. Per clause 8.9.2.4, the maximum recorded change in bracket capacitance was 5%, well below the allowed 20%. Figure 1 plots the time to detonation versus current magnitude for (5) disconnectors. Note that the time to detonation was extended to 1 ampere, well below the required 20 ampere minimum. After completing the required (10) cycle thermal cycling and seal pumping test, the disconnector capacitances were remeasured and compared with original measurements. The maximum change was 1.2%, well below the allowed 20%. Disassembly revealed that there was no moisture ingress inside the test samples. Three each of the short, medium, and long insulating brackets were successfully cantilever loaded above 1,000 in-lbs with no signs of mechanical damage. The claimed SSL rating for the attached arrester is 700 in-lbs. CONCLUSION The PDV 65 Distribution Class DM arrester disconnector successfully withstood, without damage, the charge transfer and operating duty durability tests as specified in Clauses 8.9.2.2 and 8.9.2.3, respectively. Figure 1 shows the disconnector detonation curve generated per Clause 8.9.3. The seal integrity of the disconnector was confirmed per Clause 8.9.5. Finally, the bending strengths of each of the (3) insulating bracket sizes were successfully validated per Clause 8.11.6.


Page 36 of 41

Figure 1


Page 37 of 41


Report Number TD 01 056 E11 PDV65-Optima IEC Distribution Arrester DM Designation


Salt Fog Test IEC Clause 10.8.17.2

This report presents the results of type test made on PDV65-Optima IEC Distribution Arrester DM Designation, Ur rated 3kV through 36kV. Tests were performed in accordance with procedures of IEC Standard 60099-4, Edition 3.0, 2014-06, “Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” 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.

Fayaz Khatri



Page 38 of 41

IEC Type Test Report Salt Fog Test

IEC Clause 10.8.17.2

INTRODUCTION The polymer housing salt fog test was performed per Section 10.8.17.2 of the IEC 60099-4-Ed 3.0, 2014-06 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. PROCEDURE The 1000 hour test was performed to verify Test series A per Section 10.8.17.2.2 of the IEC 60099-4-Ed 3.0, 2014-06 standard. Each arrester was mounted vertically inside the salt fog chamber. Prior to and after the 1000 hour test, the reference voltage and partial discharge of the sample were measured. The test was performed with a spray having an NaCl salt content of 10 kg/m3 per the procedure specified in section 8.7.3 of the standard. This test was performed on two 29 kV MCOV arresters. Arrester #1 was tested without its insulating support bracket attached to the base end of the arrester. Arrester #2 was tested with the insulating support bracket. RESULTS Both of the arresters tested passed the 1000 hour salt exposure. The physical condition of the polymer housings showed no signs of surface tracking or surface erosion. There was no evidence of housing or shed punctures. Table 1 summarizes the results of the electrical testing.

Table 1:

Sample Number Reference Voltage

kVc Before Salt Fog

Reference Voltage kVc After Salt Fog

Reference Voltage % Change

Partial Discharge After Salt Fog PC

1 44.3 45.0 +1.6 <1

2 44.6 45.0 +0.9 <1

Figures 1 and 2 show the salt-contaminated surfaces of the two arresters after completion of the 1000 hour duration salt fog test. There was no evidence of surface tracking, erosion, or shed punctures. CONCLUSION

The physical condition of the test arrester and the electrical testing confirmed that the PDV65 Class DM arresters successfully passed the 1000 hour salt fog exposure test.

- 39 -

IEC Type Test Report Salt Fog Test


Figure 1. Bracketless PDV65 Class DM arrester after salt fog testing

Figure 2. PDV65 Class DM arrester with isolator bracket after salt fog testing

- 40 -



UV Light Test



Fayaz Khatri


- 41 -

IEC Type Test Report UV Light Test

IEC Clause 10.8.17.3 INTRODUCTION Polymer arrester housings are exposed to ultra violet (UV) radiation not only from sunlight, but also from corona and dry band arcing. Resistance to surface degradation resulting from UV exposure is an important factor in confirming the service life of a polymer arrester. PROCEDURE The UV life test was performed per clause 10.8.17.3 of IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” Tests on polymer housing material used the fluorescent UVB technique specified in clause 10.8.17.3.1. As specified, ASTM G154, ISO 4892-1, and ISO 4892-3 provided details for performing the test. Test duration was 1000 hours on three samples of material. RESULTS There was no evidence of surface degradation, cracking or crazing on the arrester housings after completion of the 1000 hour on-voltage test. CONCLUSION The PDV 65 Distribution Class DM arrester successfully passed the polymer housing UV life test as defined in the IEC 60099-4, Edition 3.0, 2014-6 “Surge arresters -- Part 4: Metal-oxide surge arresters without gaps for a.c. systems.”

Documents

The Ohio Brass Company · 2018. 11. 1. · 213274 30 24.4 405 450 89.3 127 230 78.6 85 213279 36 29 450 527 107.2 152 250 94.3 110 CONCLUSION All housings meet or exceed the required