Model Description:

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

XP - Standard Type Disc Shaped Suspended Porcelain Insulator

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

XHP - Dome Umbrella Contaminant-Resistant Disc-Type Suspended Porcelain Insulator

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

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

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

The "C" following the kN value indicates a slot-type connection structure, the "T" denotes a socket-head cap-sleeve connection structure, while the socket 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 failure load value, in kN.

B or C indicates ball socket or slot connection.

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

P indicates the large爬距.

 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 type connection, standard type, 146—Structural height

2. U100BP/155D: U-hanging, 100kN, B-ball socket connection, P-corrosion-resistant, 155-structure height, D-dual umbrella

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

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