Bowl-shaped porcelain insulator with a bell jar design

Model Description:

GB/T 7253-1987 and JB 9681-1999 standards specification (old models):

XP - Standard Type Disc Shaped Suspended Porcelain Insulator

XWP - Oil-Impermeable Spherical Suspension Porcelain Insulator

XHP -污染耐久盘形悬挂式瓷绝缘子

XMP - Hat-shaped, Non-stick, Dish-type Suspendable Ceramic Insulator

Numbers 1, 2, 3... are the design sequence numbers.

The number following the “—” represents the rated mechanical and electrical breakdown load value, in kN.

The "C" following the kN value indicates a groove-type connection structure, the "T" denotes a socket cap-slab foot connection structure, while the ball socket connection structure is not indicated.

GB/T 7253-2005 Standard Specification (New Model):

U - Suspended Insulator

The number following "U" indicates the specified mechanical or mechanical failure load value, in kN.

B or C represents ball socket or slot connection.

S or L denotes short or long structure height, M represents medium-long, and EL indicates extra-long.

P stands for large step pitch.

 Note: The naming method for insulator codes in the bidding documents of the State Grid Corporation is as follows:

1. U70B/146: U—Suspended, 70kN, B—Bushing type connection, Standard type, 146—Structure height

2. U100BP/155D: U—suspended, 100kN, B—spherical socket joint, P—corrosion-resistant, 155—structure height, D—double canopy

3. U160BP/170T: U—Suspended, 160kN, B—Socket-type connection, P—Corrosion-resistant, 170—Structural height, T—Triple umbrella

4. U70C(N)/200: U-hanging type, 70kN, C-slot connection, CN-tension-resistant, ground wire insulator.