Model Description:

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

XP - Standard Type Disc Shaped Spherical Porcelain Insulator

XWP - Oil-Impermeable Disc-Shaped Suspended Ceramic Insulator

XHP - Spherical Cap Insulator with Anti-Fouling Dish for Overhead Suspension

XMP - Hat-shaped dirt-resistant disc-type suspended porcelain insulator

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

"—" followed by the number is the rated mechanical and electrical failure load value, kN.

The "C" following the kN value indicates a groove-type connection structure, while "T" denotes a ball-joint cap-flange connection structure. The ball-joint 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 destruction load value, in kN.

B or C indicates ball socket or slot connection.

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

P indicates the large climbing distance.

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

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

2. U100BP/155D: U—Suspended, 100kN, B—Bushing-type connection, P—Corrosion-resistant, 155—Structure height, D—Double canopy

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

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