Model Description:

GB/T 7253-1987 and JB 9681-1999 Standards (Old Model)

XP - Standard Type Disk Shaped Suspended Porcelain Insulator

XWP - Durable Pollution-Resistant Dish-Type Suspended Ceramic Insulator

XHP - Spherical Cover Umbrella Type污染 resistant Disc Shaped Suspension Porcelain Insulator

XMP - Grass Hat Type Oil-Resistant Disc Shaped Suspended Ceramic Insulator

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

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

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

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

U - Suspended Insulator

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

B or C indicates ball joint or groove connection.

S or L denote short or long structural height, M indicates medium-length, and EL stands for extra-long.

P stands for large step pitch.

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

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

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

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

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