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Home > Products > Porcelain Insulator > Line Post Insulator > Porcelain Line Post Insulator 57-25
Porcelain Line Post Insulator 57-25
Porcelain Line Post Insulator 57-25
  • Porcelain Line Post Insulator 57-25
  • Porcelain Line Post Insulator 57-25

Porcelain Line Post Insulator 57-25

    Payment Type: L/C,T/T
    Incoterm: FOB,CFR,CIF
    Min. Order: 1000 Piece/Pieces
    Delivery Time: 30 Days

Basic Info

Model No.: 57-25

Application: High-voltage

Material: Porcelain

Structure: Post Insulator

Usage: High Voltage Power Transmission

Connection Method: Trough Type

Certification: SGS, ISO9001

Color: Brown , Light Grey

Place Of Origin: Fuzhou,China

HS Code: 85462090

Additional Info

Packaging: Carton, Wooden case, Sack

Transportation: Ocean,Land


Product Description

Porcelain Line Post Insulator 57-25

1. Insulator post transformer have superior properties of low and medium temperature resistance.
2. Junper post insulatorhas strong aging resistance.
3. Porcelain line Post Insulator is nice appearance & long service time.
4. Comman glaze and semi-conductor glaze, color brown and gray both available.

ANSI Class 57-25
Creepage Distance, mm 1145
Dry Arcing Distance, mm 438
Cantilever Strength, kn 12.5
Low Frequency Flashover Voltage Dry, kv 175
Wet, kv 160
Critical Impulse Flashover Voltage
Pos., kv 290
Neg., kv 380
Test Voltage to Ground, kv 44
Maximum RIV at 1000KHZ, μv 200
Net Weight, Each Approx., kg 19.5

line post insulator

Our Services

1. Small Orders Accepted
2. Fast producing time, Prompt Delivery
3. International Approvals
4. Reply promptly in 24 hours
5. Best Price


1. Q: How about payment terms?
A: 30% TT deposit + 70% TT before shipment,50% TT deposit + 50% LC balance, Flexible payment can be negotiated.
2. Q: Do you have some videos where we can see the line producing?
A: Yes, we can provide some videos for reference.
3. Q: Are you a Manufacture Factory?
A: Yes. We are the direct manufacture factory, and our factory has specialized in Porcelain Insulator,Composite Insulator,Glass Insulator,arrester, Cold And Heat Shrinkable Tube,Cut Out Fuse and Power Fitting ,etc.

4. Q: How long is producing time ?

A: Normally it will take about 30 days for production.

5. Q: What is the standard of package ?
A: For small capacity, we use carton, but for big capacity, we will use strong wooden case for protection or double inner packs in a master carton.
6. Q: How do you make sure your good quality ?

A: We use the best raw material , and every single product will go through a series of strict test.



porcelain insulator

We warmly welcome friends both domestic and abroad to visit our company, if you have any questions, please contact with us directly.

Looking for ideal Insulator Post Transformer Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Jumper Post Insulator are quality guaranteed. We are China Origin Factory of Line Post Insulator 115kv. If you have any question, please feel free to contact us.

Product Categories : Porcelain Insulator > Line Post Insulator

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