Technical standard:
The first part GB/T 1001.1-2003 overhead line insulators "nominal voltage above 1000V: AC system with ceramic or glass insulator components - Test methods and definitions, criteria"
GB/T 4056-2008 "string insulator units" socket connection size
GB/T 7253-1987 "disc suspension insulator element size and the characteristics of"
JB 9681-1999 "high voltage line tolerance of disc suspension insulators"
Overhead line insulator AC system GB/T 7253-2005 "with a nominal voltage above 1000V ceramic or glass insulator element - disc suspension insulator element characteristics"
Model description:
GB/T 7253-1987 and JB 9681-1999 standard (old model):
XP: common type of disc suspension insulators;
XWP - resistant disc suspension insulators;
XHP - Bell umbrella tolerance of disc suspension insulators;
XMP - hat type stain resistant disc suspension insulators;
The numbers 1, 2, 3... For the design of sequence number;
"-" digital rated electrical failure load value, kN;
The value of kN behind the C shaped connection structure, T socket cap - flat pin connection structure, socket connection structure not said.
GB/T 7253-2005 standard (new type):
U znsulator;
U said after the digital electrical or mechanical provisions of the failure load value, kN;
B or C socket or slot connection;
S or L for short or long structural height, M said in a long, long EL;
P said a large climbing distance.
Note: in the national Power Grid Corp in the bidding document naming method of insulator code is as follows:
Example: 1 U70B/146:U - B - 70kN, suspension, ball and socket type connection, ordinary type, 146 to the height of the structure;
2 U100BP/155D:U - 100kN - B, suspension, ball and socket type connection, P - type 155 - level structure of anti fouling, and D double umbrella;
3 U160BP/170T:U - 160kN - B, suspension, ball and socket type connection, P - type 170 - level structure of anti fouling, and T - three umbrella;
4 U70C (N) /200:U - C - 70kN, suspension, slot connection, CN tension type, ground insulator.
