PXXHDC 55-4 Porcelain Spool Insulator

short description:

Price: 1.29USD

Diameter (D): 5 19/32Inches (142mm)

Spacing (H): 4 3/8Inches (111mm)

Leakage Distance: 9Inches (229mm)

Dry Arcing Distance: 5Inches (127mm)

Minimum Pin Height: 5Inches (127mm)

Net Weight Each: 4Pounds (1.8kg)

Product Detail

Product Tags


Place of origin: China
Brand name: PXXHDC
Model name: 55-4
Type: insulator
Material: porcelain
Application: low voltage
Tensile strength:13kN
Color: white and brown
Product name: 55-4 spool 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: 3,000Pounds (13.2kN)

Electrical Values

Typical Application Voltage: 13.2kV
Low-frequency Dry Flashover Voltage: 65kV
Low-frequency Wet Flashover Voltage: 35kV
Critical Impulse Flashover Voltage, Positive: 130kV
Critical Impulse Flashover Voltage, Negative: 150kV
Low-frequency Puncture Voltage: 115kV
RIV Test Voltage to Ground: 10kV
Maximum RIV at 1,000kHz: 50μV

Pin insulator

A rigid insulator consisting of an insulating component intended to be mounted rigidly on a supporting structure by means of a pin passing up inside the insulator. The insulating component may consist of one or more pieces of insulating material permanently connected together. The fixing of the insulating component to the pin can either be separable or permanent (pin insulator with integral pin).

Identification of insulators
Each insulator shall be marked, eight on the insulating component or on a metal part, with the name or trade mark of the manufacturer and the year of manufacture. In addition, each string insulator unit shall be marked with the specified electromechanical or mechanical failing load whichever is applicable. These markings shall be legible and indelible.


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.

  • Previous:
  • Next:

  • Write your message here and send it to us