Model Description:

Standards specified by GB/T 7253-1987 and JB 9681-1999 (old models):

XP - Standard Type Disk Shaped Suspendable Porcelain Insulator

XWP - Non-stick Disk Shaped Suspended Porcelain Insulator

XHP - Spherical Umbrella Pollution-Resistant Disc Shaped Suspended Porcelain Insulator

XMP - Grass Hat Type Non-Stick Dish-shaped Suspendable Ceramic Insulator

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

The number following “—” is the rated mechanical and electrical failure load value, kN.

The "C" following the kN value indicates a groove-type connection structure, the "T" denotes a socket-head cap-screw connection structure, while the ball joint 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 indicates ball and socket or groove connection.

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

P indicates the large爬距 (distance between rungs).

 Note: The naming method for insulator designations in the State Grid Corporation of China's bidding documents is as follows:

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

2. U100BP/155D: U—suspended type, 100kN, B—spherical socket connection, P—anti-corrosion type, 155—structural height, D—double canopy

3. U160BP/170T: U-hanging, 160kN, B-ball socket connection, P-corrosion-resistant, 170-structure height, T-tri-umbrella

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