Model Description:

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

XP - Standard Type Disk Shaped Suspend Type Porcelain Insulator

XWP - Non-stick Dish-shaped Swaying Ceramic Insulator

XHP -污染抵抗型钟罩伞盘形悬挂式瓷绝缘子

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

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

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

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

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

U - Suspended Insulator

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

B or C indicates ball socket or groove-type connections.

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

P stands for large stepover.

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—Structure height

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

3. U160BP/170T: U-hanging, 160kN, B-ball joint, P-anti-corrosion, 170-structural height, T-tri-umbrella

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