PXXHDC 55-3 Porcelain Pin Insulator

short description:


Diameter (D): 4 3/4 Inches (121mm)

Spacing (H): 3 3/4 Inches (95mm)

Leakage Distance: 7 Inches (178mm)

Dry Arcing Distance: 4 1/2Inches (114mm)

Net Weight Each: 2.2 Pounds (1.0kg)

Product Detail

Product Tags


Place of origin: China
Brand name: PXXHDC
Model name: 55-3
Type: insulator
Material: porcelain
Application: low voltage
Tensile strength:11kN
Color: white and brown
Product name: 55-3 pin insulator
Certification: ISO9001/ISO14001/ISO18001
Usage: Insulation protection
Standard: ANSI/IEC60383
Advantage: factory price, high quality
Packing: carton box
MOQ: 1000 Pieces

Mechanical Values

Cantilever Strength: 2,500Pounds (11kN)

Electrical Values

Typical Application Voltage: 11kV
Low-frequency Dry Flashover Voltage: 56kV
Low-frequency Wet Flashover Voltage: 30kV
Critical Impulse Flashover Voltage, Positive: 90kV
Critical Impulse Flashover Voltage, Negative: 110kV
Low-frequency Puncture Voltage: 90kV
RIV Test Voltage to Ground: 10kV
Maximum RIV at 1,000kHz: 50μV
High voltage line pin type porcelain insulator:
High-voltage line pin porcelain insulators are mainly used for insulating and supporting conductors in overhead transmission lines. According to the rated voltage, it is divided into five grades: 6, 10, 15, 20 and 35kV. The pin insulator is composed of porcelain and steel feet (or screw sleeves), and the porcelain and steel feet (or screw sleeves) are connected with Portland cement cement as a whole. The surface of the porcelain is white or brown, and the surface of the steel foot is hot-dip galvanized.


A disruptive discharge external to the insulator, connecting those parts which normally have the operating voltage between them.
Dry lightning impulse withstand voltage
The lightning impulse voltage which the insulator withstand dry, under the prescribed conditions of the test
Wet power frequency withstand voltage
The power frequency voltage which the insulator withstand wet, under the prescribed conditions of test.

Puncture voltage

The voltage which causes puncture of a string insulator unit or a rigid insulator under the prescribed conditions of test

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