PORTER

High Impact L.V. (LOW VOLTAGE)

Revised 11-1972

PIN INSULATOR

For Railroad
Telephone
Telegraph
Communications
Lines

Non-breakable, light weight features result in . . .

• Lower Installation Cost • Lower Maintenance Cost • Lower Freight Cost

FEATURES

• Impact strength-able to resist damage by pellets, rocks, BB's, small bore rifles, accidental dropping during installation, or mishandling when in transit.
• Light weight-1600% less weight than a comparable glass insulator.
• Lasting transparency-high light transmittance reduces "visibility" of insulator when installed.
• Wide temperature limits-properties are maintained despite heat-and cold. Remains ductile and impact resistant in -60F and does not distort in 250 heat.
• Electrical performance-retains its characteristics over a wide range of frequencies and temperatures.
• Abrasion resistant.
• Self extinguishing, flame retardant-will not support combustion.
• Good chemical and staining resistance properties.
• Eliminates danger and expense of broken insulators.
• Reduces shipping cost from distribution areas.
• Eliminates bulky packing material.

H.K. Porter Insulators
4 THREADS PER INCH TAPERING 1.111 INCH PER FOOT x 1 3/4 DEEP (PER AAR I-A-33). 4 THREADS PER INCH TAPERING 1.111 INCH PER FOOT x 11 1/2 DEEP THREAD ANGLE 106 (PER AAR I-A-33).
1069324-W
L. V. Insulator
For Wood Pin
106932-S
L. V. Insulator
For Steel Pin

DESIGN

The 106932 L. V. Insulator is now available for wood or steel pin mounting per REA Spec. PE-34. No bushing is required. The L. V. Insulator meets the requirements of the Association of American Railroad's Specification I-A-33, for Type C-1999, petticoat insulator and Bell Telephone Laboratory Specification AT-7051 for type D.P. and Toll insulators. By using high impact electrical grade polycarbonate resin (Underwriters Laboratory approved for electrical applications) the wall thickness of the L.V. Insulator has been reduced in comparison to the glass and still maintains superior mechanical characteristics and equivalent electrical properties.

Ordering Instructions- When ordering use the suffix "W" for wood pin and "S" for steel pin mounting. Example: 106932-W-106932-S

COMPARISON TEST DATA USING L.V. 106932 VS TYPE C-1999 OR TYPE D.P. INSULATOR

TESTS CONDUCTED L.V. Insulator Glass Insulator
Electrical Tests
Dielectric Strength-Dry

(Tested in accordance with A.S.A. Spec. C29.1, Section 3)

32.6 KV 42.9 KV
Dew Flashover

(Tested in accordance with A.S.A. Spec. C29.1, Section 4.6)

32.3 KV 25.5 KV
Impulse Withstand Voltage (1.5 x 40 Wave)

(Tested in accordance with Section 4.8 of A.S.A. Spec. 29.1 and NEMA Publication 109)

53.0 KV 58.3 KV
Thermal Shock Tests
Hot to Cold Test (Temperature differential 70 F) No Effect No Effect
Cold to Hot Test (Temperature differential 100 F)

(Tested in accordance with Section F of the Association of American Railroads, Spec. 1-A-33 and Bell Telephone Laboratories Spec. AT-7051)

No Effect No Effect
Special Cold to Hot Test-Insulators placed in a freezer at 0 F for thirty minutes, then immersed in water at 155 F for thirty minutes - temperature differential 155 F No Effect Shattered
Mechanical Tests
Drop-Shock Test

Insulators were dropped (free fall) from a height of fifty feet on to a concrete surface

No Effect Shattered
Rifle Shot Test

Insulators were mounted on a wood post and subjected to repeated shots from 25 to 50 feet distance using standard .22 caliber rifle

Will penetrate through insulator, leaving a hole but no cracks or chips. Some shots off centerline of insulator are deflected. Chipped, cracked, and shattered
Cantilever Load Test

(Tested in accordance with Bell Telephone Laboratories Specification AT-7051, paragraph 3.2)

No Effect No Effect
Weight

106932-W
106932-S

.09 Ibs.
.12 Ibs.
1.55 Ibs.

For more information write Electrical Division, H. K. Porter Company, Inc.,
Porter Building, Pittsburgh, Pa. 15219

PORTER
ELECTRICAL DIVISION
H. K. PORTER COMPANY, INC.