Model Description:

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

XP - Standard Type Disc Shaped Suspended Porcelain Insulator

XWP - Non-stick Disk Shaped Suspended Ceramic Insulator

XHP - Spherical Umbrella Type Suspending Porcelain Insulator with Anti-Soiling Dish

XMP - Grass Hat Type Durable Contaminant-Resistant Spherical Suspended Ceramic Insulator

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

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

The "C" following the kN value denotes a slot-type connection structure, the "T" indicates a ball-joint cap-flange connection structure, and the ball-joint structure is not represented.

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

U - Suspended Insulator

The number following the "U" indicates the specified mechanical or mechanical failure 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-long, and EL indicates extra-long.

P indicates the large climbing distance.

Note: The naming method for insulator designations 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—Bushing type connection, P—Corrosion-resistant, 155—Structure height, D—Double canopy

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

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