28kV Class Loadbreak Bushing Insert With Interface...

<.elastimoldO

TEST REPORT NUMBER: 283-17-8017

Thomas_ettsUTILITY PRODUCTS GROUP

DATE: 1-23-08

REPORT OF TEST ON

2701A428kV Class Loadbreak Bushing Insert

With Interface Sleeve

Thomas & Betts CorporationElastimold - Hackettstown Facility497 Schooley's Mountain RoadHackettstown, NJ 07840-3906(908) 852-1122(908) 813-2091 FAX

Statements made and data shown are, to the best of our knowledge and belief,correct and within the usual limits of commercial testing practices.

~~

Title Product Engineering Mgr.

~-Name Anthony ReedTitle Director of R&D-Elastimold

(7.4 )(7.5.1 )(7.5.2)(7.5.3)

Test Report #283-17-8017 of 10

OBJECTIVE

A. Verify that the performance levels of Elastimold® 2701A4 bushing insertswith interface sleeve meet the requirements of ANSI/IEEE 386-2006 andits proposed revision.

B. Provide application data relating to low current switching.

TESTS PERFORMED

The ANSI 386-2006 tests performed are listed below with the appropriate sectionreferences.

The parts tested with the 2701A4 inserts were the 275LR or 276LR elbows, andK1601 PC-T1 R universal wells, in all instances requiring complete assembliesunless otherwise specified.

TEST SUMMARY

The data presented in this report for the 2701A4 bushing insert combined withthe data presented in Elastimold Test Report No. 278-17 -7268 for the275LR/276LR elbow demonstrates that the Elastimold 25kV class loadbreakconnector system meets or exceeds all applicable requirements of ANSI/IEEEStd. 386-2006 and its proposed revisions.

• Electrical Testing ANSI Std. 386-2006 (Section)o A. Voltage Performance

1. Corona Voltage Level2. AC Withstand3. DC Withstand4. Impulse Withstand

o B. Current Carrying Capability1. Short-time Current (7.6)2. Current cycling (7.10)3. Accelerated Thermal Test (7.10.1)

o C. Switching Performance1. Switching Current2. Fault-Closure Current3. Operating Force Test

(7.7)(7.8)(7.14 )

o D. Sealing1. Accelerated sealing life test (7.12)


TEST RESU LTS

• A-1 Corona VoltaQe LevelThe purpose of this test is to verify that the corona voltage level of the testspecimen is above 19kV.

The test procedure consisted of raising the applied voltage to 29kV or untilcorona initiated and then lowering the voltage until corona, if present,extinguished. The test equipment used for this test had a sensitivity ofthree picocoulombs.

Ten assemblies were subjected to this test.

RESULTS: Ten assemblies had a Corona Extinction Voltage (CEV) inexcess of 19kV.

(Corona tests are performed on 100% of Elastimold premoldedconnectors. Each must have a Corona Extinction Voltage (CEV) of 19kVor higher for any discharge of three picocoulombs or greater.)

• A-2 AC Voltage WithstandThe purpose of this test is to verify that the insulation of the test specimenwill withstand 40kV for one minute.

The test voltage was raised from zero to 40kV in 30 seconds or less. Theassembly must withstand this applied voltage for one minute withoutflashover or puncture.

RESULTS: Ten assemblies passed the design AC withstand voltage test.

• A-3 DC Voltage WithstandThe purpose of this test is to verify that the insulation of the test specimenwill withstand 78kV DC for 15 minutes.

The test voltage was of negative polarity (negative terminal connected tothe center conductor of the test specimen) and was raised from zero to78kv in 30 seconds or less. The assembly must withstand this appliedvoltage for 15 minutes without flashover or puncture.

Ten assemblies were subjected to this test.

RESULTS: Ten assemblies passed the design DC withstand voltage test.

(Elastimold standard production practice includes 100% dielectric strengthverification using appropriate impulse or AC withstand voltage.)


• A-4 Impulse Voltage WithstandThe purpose of this test is to verify that the insulation of the test specimenwill withstand a 125kV impulse (three shots at each polarity).

The test voltage was a 1.2 x 50 micro-second wave having a crest valueof 125kV. Ten assemblies were subjected to this test.

RESULTS: Ten assemblies passed the design impulse withstand voltagetest.

(Elastimold standard production practice includes 100% dielectric strengthverification using appropriate impulse or AC withstand voltage.)

• B-1 Short-Time Current WithstandThe purpose of this test is to verify that the connector is capable ofwithstanding short-time currents of 10,000 amperes for 0.17 seconds (10cycles), and 3,500 amperes for 3.0 seconds (180 cycles) with all currentwaves having 1.3 minimum asymmetry factor.

Four assemblies were tested.

RESULTS: Four assemblies passed the above test without any trace ofthermal breakdown.

• B-2 Current CyclingThe purpose of this test is to verify temperature and resistance stability ofthe uninsulated connector system during current cycling.

The test was conducted in accordance with ANSI C119.4-1986 standardfor electrical connectors - "Connectors for use between aluminum-toaluminum or aluminum-to-copper bare overhead conductors. 11

Parameters of the test are outlined below:

Number of Samples:Control Conductor:Nominal Current:

Control Conductor Temp.Ambient Temp.Cycle Period:

Number of Cycles:

41/0 Aluminum232A125 ± 5°C25 ± 5°CON 2 hrs.OFF 2 hrs.500

Thermocouple locations and resistance measurement locations areshown in the test circuit diagram (Figure 1).


• B-2 Current Cycling, continuedRequirements for the test are as follows:

Resistance. The resistance of the connection tested shall be stable

between the twenty-fifth cycle and the five-hundreth cycle. Stability isachieved if any resistance measurement, including allowance formeasurement error, does not vary by more than ± 5% from the average ofall the measurements in this inteNal.

Temperature. The temperature of the connector tested shall not exceedthe temperature of the control conductor. The temperature differencebetween the control conductor and the connector shall be stable betweenthe twenty-fifth cycle and the five-hundreth cycle. Stability is achieved ifany temperature difference between the control conductor and theconnector, including allowance for measurement error, is not more than10°C below the average of all temperature differences in this inteNal.

RESULTS: All four samples (sample numbers 1 through 4) successfullypassed temperature and resistance requirements as shown in Table 1and Table 2, respectively.

After completing the required 500 cycles, the test was continued tomeasure ultimate capability. Temperature and resistance stability wassuccessfully maintained through 1200 cycles. At this point two sampleswere removed for analysis. The test was continued on the remaining twosamples for a total of 4396 cycles before the test was terminated due to atest equipment problem. Temperature and resistance stability wasmaintained within the limits of the requirement for these two samples.Physical analysis of all four samples showed no significant effects of thecurrent cycling on the parts.

• B-3 Accelerated Thermal Test

The purpose of the accelerated test is to demonstrate that 200Ampinsulated connectors can carry rated current under usual seNiceconditions.

RESULTS: All four samples successfully passed the temperature andresistance requirements.

• C-1 Switching CurrentThe purpose of this test is to verify that the loadbreak connector iscapable of closing and interrupting 200 amps with a three-phase circuithaving nominal voltages of 15.2kV line-to-ground and 26.3kV line-to-line(voltage between open contacts). Each connector is required to withstandten complete switching operations. A total of 30 samples were tested.

RESULTS: The ten consecutive requirement was met.


• C-2 Fault-Closure

The purpose of the test is to verify that the connector is capable of closin!on fault currents up to 10,000 amps magnitude and 0.17 second duratiolwith 26.3kV between the open contacts. The first ten samples thapassed switching (C-1) were tested.

RESULTS: All ten samples passed with:

1. Oscillograms showing no external ground currentsAND

2. All parts remaining within the closed connection assemblies.

The results of C-1 and C-2 demonstrate ten consecutive sample~successfully meeting switching and fault-close requirements.

• C-3 Operating Force TestThe purpose of this test is to demonstrate that the force necessary tcoperate a connector meets the requirements of IEEE Std. 386-200((Section 6.2)

RESULTS: All four samples passed the operating force requirements.

• D-1 Accelerated Sealing Life TestThe purpose of this test is to demonstrate that the conductor can maintaira long term seal at all interfaces to prevent the entrance of moisture.

RESULTS: All four samples passed.


""51 ell" .• faST C'."JlT

fig" •.•

SAIIPL& I

STI.IfD&D cor'll CDNDUCTOI

$.U'LC a

ItQUALI%J:I /'

MD. Z Aye STIAII'DID ca"'I. CDN'DUCTDI--

!l\:T'aWDCD tOPPEI CQNDUCTOI

SA.,LI: •".

!IOUI'LI' ~

..".1


Table 1

ANSI C119.4 TEMPERATURE MEASUREMENTS

Connector Temperature, • - ••• ..--. - .• -. - - ••• _. _ •• _____ •••• _" __ 1111 ••••_"_.'

SAMPLE 1Number

Control12345Cycles Conductor

251247351 6856 6262 5965 6064

501247549 7054 6460 6163 6262

751247648 7054 6658 6262 6262

1001207446 7050 6357 6060 6060

1251227448 6854 6359 6062 6161

1651247648 7054 6658 6262 6361

2051217645 7051 6556 6160 6259

2501247648 7153 6658 6262 6361

3301227646 6953 6458 6062 6161

4101257847 7352 6857 6560 6659

5001237647 7053 6558 6261 6261

Avq. Temp. Diff.

47.5553.0958.2761.7361.00Min. Accept. Temp.Diff.

37.5543.0948.2751.7351.00Pass or Fail Status

PASSPASSPASSPASSPASSAvq. - Minimum

2.53.12.31.72.0Max. - Averaqe

3.52.93.73.33.0

SAMPLE 2Number

Control6

78910Cycles Conductor25

1246361 6173 6559 7054 754950

1246460 6262 6658 7153 764875

1246658 6460 6856 7852 6846100

1206357 6159 6654 7050 7545125

1226458 6260 6656 7052 7646165

1246658 6460 6856 7252 7846205

1216556 6358 6853 7249 7744250

1246757 6460 6955 7351 7846330

1226557 6260 6755 7250 7745410

1256956 6758 7253 7550 8045500

1236657 6459 6855 7251 7845

Avq. Temp. Diff.


47.7349.9145.4541.2735.91---.--- --

Pass or Fail Status PASSPASSPASSPASSPASSAvg. - Minimum

1 71 92.52.31.9Max. - Averaqe

3.3::S.13.52.73.1

Connector Temperature(Temperature Difference: Control-C


Table 1, continued

ANSI C119.4 TEMPERATURE MEASUREMENTS

- - ~- - - - ,SAMPLE 3

Number

Control11


1247252 6658 6064 5668 586650

1247549 6955 6361 5866 606475

1247648 7054 6460 6064 6262100

1207248 6654 6159 5763 5961125

1227448 6854 6359 5864 6062165

1247549 6955 6460 5866 6163205

1217447 6853 6259 5764 6061250

1247648 7054 6460 5866 6262330

1227349 6755 6260 5666 5963410

1257946 7253 6857 6263 6461500

1237746 7053 6558 5964 6261

Avg. Temp. Diff.


38.1844.3649.7354.9152.36Pass or Fail Status

PASSPASSPASSPASSPASSAvg. - Minimum

2.21.42.71.91.4Max. - Average

3.83.64.33.13.6

SAMPLE 4Number

Control16


1246064 5965 6361 6856 745050

1246262 6262 6658 7153 764875

1246361 6262 6658 7153 7747100

1206159 6060 6456 6951 7446125

1226161 6062 6458 6953 7547165

1246361 6262 6658 7153 7648205

1216259 6160 6556 7051 7546250

1246361 6262 6658 7153 7648330

1226161 5963 6458 6854 7448410

1256659 6560 6956 7451 7946500

1236360 6261 6657 7152 7647

Avg. Temp. Diff.


50.7351.7347.6442.7337.36-.Pass or Fail Status PASSPASSPASSPASSPASSAvg. - Minimum

1.71.71.61.71.4Max. - AveraQe

3.33.33.43.32.6


Table 2

C119.4 RESISTANCE MEASUREMENTS

Connection Resistance*(DC)Microhms

Number Ambient °CR1R2R3R4Cvcles

2522326.4340.3313.5340.3

5024323.9340.6310.1337.7

7526324.4343.9310.7339.0

10023326.2343.0314.3341.0

12523324.2344.9311.3339.0

16526322.4343.9309.7341.9

20524323.9345.6312.1341.6

25025324.6349.1312.9341.3

33024328.8353.4315.0345.6

41026329.2353.7316.5346.8

50020328.0353.0317.0347.0

Ava. Resistance

325.6346.5313.0341.9Max. AcceDt. Resistance

341.9363.8328.7359.0Min. AcceDt. Resistance

309.3329.2307.3324.8

Pass or Fail status

PASSPASSPASSPASS

*Rp.~i~t::!nr.p. v::!hIP.~ r.orrp.r.tp.rl to ?()0r.

28kV Class Loadbreak Bushing Insert With Interface...

Documents

Transcript of 28kV Class Loadbreak Bushing Insert With Interface...