U-100 catalog

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MARCH 2008

U-10

OHIO BRASS AIKEN, SC

POWER SYSTEMS, INC.

Printed in USA

Sect

U-1

DynaVar

Distribution Class Riser Pole (PVR) Surge Arresters

2M GEN 3/08

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MARCH 2008 OHIO BRASS AIKEN, SC

U-100-2

POWER SYSTEMS, INC.

NOTE: Because Hubbell has a policy o continuous product improvement, we reserve the right to change design and specifcations without notice.

Warranty - MaterialHubbell Power Systems, Inc. warrants all products sold by it to be merchantable (as suchterm is defned in the Uniorm Commercial Code) and to be ree rom deects in material and

workmanship. Buyer must notiy the Company promptly o any claim under this warranty. The

Buyers exclusive remedy or breach o this warranty shall be the repair or replacement, F.O.B.actory, at the Companys option, o any product deective under the warranty which is returned

to the Company within one year rom the date o shipment. NO OTHER WARRANTY, WHETHER

EXPRESS OR ARISING BY OPERATION OF LAW, COURSE OF DEALING, USAGE OFTRADE OR OTHERWISE IMPLIED, SHALL EXIST IN CONNECTION WITH THE COMPANYS

PRODUCTS OR ANY SALE OR USE THEREOF. The Company shall in no event be liable orany loss o profts or any consequential or special damages incurred by Buyer. The Companys

warranty shall run only to the frst Buyer o a product rom the Company, rom the Companys

distributor, or rom an original equipment manuacturer reselling the Companys product, and isnon-assignable and non-transerable and shall be o no orce and eect i asser ted by any per-

son other than such frst Buyer. This warranty applies only to the use o the product as i ntended

by Seller and does not cover any misapplication or misuse o said product.

Warranty - ApplicationHubbell Power Systems, Inc. does not warrant the accuracy o and results rom product orsystem perormance recommendations resulting rom any engineering analysis or study. This

applies regardless o whether a charge is made or the recommendation, or i it is provided reeo charge.

Responsibility or selection o the proper product or application rests solely with the purchaser. In

the event o errors or inaccuracies determined to be caused by Hubbell Power Systems, Inc. , itsliability will be limited to the re-perormance o any such analysis or study.

Table o ContentsPage

Warranty ................................................................................... U-100-2

Introduction .............................................................................. U-100-3

Basic Construction ................................................................... U-100-3

Tests Verify PVR Arrester Design .............................................. U-100-4

Full Scale Fault Current Tests ............................................... U-100-4

Design Test Report Summary ............................................... U-100-4

Selection Considerations ......................................................... U-100-5

Temporary Overvoltage .............................................U-100-5, U-100-6

Tightening Torques for PVR Arrester Fasteners ....................... U-100-6

PVR Electrical Characteristics .................................................. U-100-7

Typical Mounting Congurations

and Hardware ....................................................................... U-100-8

Copyright 2008 Hubbell 210 North Allen Street Centralia, MO 65240

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POWER SYSTEMS, INC.

Basic Construction

In Ohio Brass arresters, the Varistors are locked in

place with tightly wound layers of berglass lament

impregnated with epoxy resin. The arrester housingis made from our proprietary blend of ESP silicone

alloy. In addition to ESPs exceptional performance

as an insulator material, ESPs properties have been

conrmed in a series of performance tests which

include tracking resistance, contamination, aging, and

seal design.

PVR arresters are used with all standard mounting

arms and brackets. They come with all the necessary

fasteners, isolators, and terminal attachments. A

specially designed glass-lled polyester insulating

bracket, with integrated disconnector, along withoptional mounting brackets such as the cross arm or

transformer bracket, enable mounting the arrester in a

way which best suits each individual customer.

Cutaway View o Typical PVR Unit

Introduction

Ohio Brass PVR arresters target cable applications

where low discharge voltages promote longer cable

life.

Stainless SteelTerminal Stud

Stainless Steel Cap

End Terminal

Live Silicone Interface

Alloy ESP Rubber Housing

Metal Oxide Varistor

Belleville Washer

Epoxy-Fiberglass Wrap

Metal Oxide Varistor

UNDERGROUND PRODUCTS

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U-100-4

POWER SYSTEMS, INC.

Tests Veriy PVR Arrester Design

Full Scale Fault Current Tests

Short circuit design tests were performed on PVR arrest-ers in accordance with Section 8.18 of IEEE C62.11-2004Standard. Eight arresters were tested. Per the standard, foursamples were tested at the claimed high current withstandcapability. Two of these samples were assembled withinternal fuse wires. The other two were good arresters whichwere subjected to an overvoltage condition, which failed thearrester (with a weak source). The arrester was immediatelysubjected to the claimed high current fault current. Two addi-tional arresters were subjected to fault currents approximate-ly half of the claimed high current value. The fault currentduration for all high current tests was 12 cycles. Finally, twoarresters were subjected to a nominal 600 amp, 1 secondfault current test. All test arresters were 17 kV MCOV, thelongest single module conguration used for each arrestertype. Tests were performed at full voltage (17 kV rms).

Successful performance was demonstrated when the epoxy-berglass wrapped arrester modules burned through torelieve internal pressures associated with the fault currentarcing. In all cases, the arrester remained intact, except at

the high current levels which caused polymer housing frag-mentation, which is acceptable.

The following table summarizes the claimed short circuitcapabilities for the arresters.

PVR Design Test Report Summary

There is no standard for PVR arresters so they were testedper the heavy duty requirement.

The table below summarizes the capabilities of PVR Arrest-ers.

The above is merely a summary of a portion of the design tests per-formed on PVR arresters. Contact your Ohio Brass territory managerfor complete test reports.

Arrester Type Short Circuit Test

Current Arms

Short Circuit Test

Duration-Sec.

PVR 20,000 .20

PVR 10,000 .20

PVR 500 1.0

Test Heavy DutyRiser Pole PVR

High Current-Short Duration

2 - 100 kADischarges

Low CurrentLong Duration

20 - 250A x 2000sec Discharges

Duty Cycle 20 - 10 kA

plus 2 - 40 kADischarges

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POWER SYSTEMS, INC.

Eectively

Grounded

Neutral Circuits

2.55

7.65

7.65

8.4

8.4

12.7

15.3

15.322.0

Maximum

2.54

4.4

5.08

7.26

12.7

13.2

13.97

14.52

22.0

24.2

24.34

26.436.5

Nominal

2.4

4.16

4.8

6.9

12.0

12.47

13.2

13.8

20.78

22.86

23.0

24.9434.5

ImpedanceGrounded

and Ungrounded

Circuits

2.55

5.1

5.1

7.65

12.7

15.3

22.0

22.0

22.0

Arrester MCOV-kVSystem L-L VoltagekV

NORMALLY RECOMMENDED PVR

MCOV FOR VARIOUS SYSTEM VOLTAGESSelection of arrester size is based upon the maximum

continuous operating voltage (MCOV) that is ap-

plied across the arrester in service (line-to-ground).

For arresters on effectively grounded systems, this isnormally the maximum line-to-ground voltage -- e.g.,

7.65 kV on a 12.47 kV multi-grounded system. For

ungrounded or impedance-grounded systems, the

MCOV should be at least 90 percent of maximum

phase-to-phase voltage. Smaller arresters than shown

may be used, contact your Ohio Brass representative

for details.

For convenience, the data shown in this catalog in-

cludes the traditional duty-cycle voltage rating associ-

ated with the MCOV of each arrester.

The selection of the actual type will be primarily gov-

erned by the insulation being protected.

Selection Considerations

MOV arresters by nature are voltage sensitive devices.

At normal line to ground voltages, the arrester is en-

ergized at its MCOV (Maximum Continuous Operating

Voltage) and conducts very little current. During distur-

bances on the system, the arrester can see elevated

voltages and therefore higher 60Hz current through the

Temporary Overvoltage

unit. The magnitude and duration of the system-gen-

erated temporary over voltage (TOV) that the arrester

can withstand is best expressed graphically. The curve

on the next page shows the TOV capability versus time

for OB PVR arresters.

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U-100-6

POWER SYSTEMS, INC.

RecommendedTightening Torque

20 foot pounds

20 foot pounds

20 foot pounds

Fastener3

8inch line terminal

38

inch ground terminal1

2inch fastener connecting

base bracket to crossarm ortransformer sidewall bracket

RECOMMENDED TIGHTENING TORQUES FORPVR ARRESTER FASTENERS

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Riser-PoleDynaVar PVR

Electrical Characteristics

Rated 0.5 sec 500 AVoltage MCOV Catalog 10kA Maximum Switching Surge

kV kV Number IR-kV(1) Maximum IR-kV(2) 1.5 kA 3 kA 5 kA 10 kA 20 kA 40 kA

03 02.55 221603 9.9 6.6 7.2 7.8 8.2 9.1 10.4 12.3 06 5.1 221605 20.0 13.3 14.6 15.7 16.6 18.3 21.0 24.8 09 7.65 221608 26.8 17.8 19.5 21.0 22.2 24.5 28.1 33.2

10 8.4 221609 29.5 19.6 21.5 23.1 24.4 27.0 31.0 36.612 10.2 221610 35.5 23.6 25.9 27.9 29.4 32.5 37.3 44.015 12.7 221613 44.2 29.4 32.2 34.7 36.7 40.5 46.5 54.818 15.3 221615 53.4 35.5 38.9 41.9 44.3 48.9 56.1 66.221 17.0 221617 60.7 40.3 44.3 47.6 50.3 55.6 63.8 75.324 19.5 221620 70.9 47.1 51.7 55.6 58.7 64.9 74.4 87.927 22.0 221622 78.6 52.2 57.3 61.7 65.2 72.0 82.6 97.530 24.4 221624 88.5 58.7 64.5 69.4 73.3 81.0 92.9 110.036 29.0 221629 105.0 69.7 76.5 82.4 87.0 96.1 110.0 130.0

8/20 Maximum Discharge Voltage - kV

All Ohio Brass Arresters are fully compliant with ANSI/IEEE C62.11 Standard

(1) Maximum discharge voltage for a 10-kA impulse current wave which produces a voltage wave cresting in 0.5 s. This can be used for

coordination where front-of-wave sparkover was formerly used.

(2) Based on a 500A surge of 45-s time to crest.

Riser PoleDynaVar PVR

(1) Center line to center line is equivalent to phase-to-phase; center line to ground is equivalent to phase-to-ground. These are recommended minimum clear-

ances only and as such are not intended to take precedence over existing construction codes or specications.

For appropriate packed weight, add 0.5 lb. per arrester.

Mounting Clearance (1) Approx. Net Weights

Unit withInsulating Bracket,

Isolator andNEMA Bracket

pounds

5.8

6.66.6

6.6

6.8

8.0

8.6

8.6

9.9

12.1

12.1

13.3

Unit with Insu-lating

Base Bracketpounds

3.3

4.14.1

4.1

4.3

5.5

6.1

6.1

7.4

9.6

9.6

10.8

UnitOnly

pounds

2.3

3.13.1

3.1

3.3

4.5

5.1

5.1

6.1

8.3

8.3

9.5

CenterLine toGroundinches

3.0

3.33.8

4.0

5.3

6.3

7.2

7.7

9.6

10.5

11.5

14.0

CenterLine to

Center Lineinches

5.0

5.35.8

6.0

7.3

8.3

9.2

9.7

11.6

12.5

13.5

16.0

LeakageDistanceTerminalto Baseinches

8.0

15.415.4

15.4

15.4

26.0

26.0

26.0

30.8

52.0

52.0

52.0

MCOVkV

2.55

5.17.65

8.4

10.2

12.7

15.3

17.0

19.5

22.0

24.4

29.0

RatedVoltage

kV

3

69

10

12

15

18

21

24

27

30

36

XOverallHeightinches

7.0

9.49.4

9.4

9.4

12.4

12.4

12.4

14.7

21.1

21.1

21.1

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U-100 catalog