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 1000.2-1988 "high voltage line needle type porcelain insulator dimensions and characteristics"
GB 1000-81 "high voltage line" needle type porcelain insulator
Model description:
GB 1000-1981 standard:
P needle type insulator;
"-" digital rated voltage, kV;
T - iron bear;
M - wood cross.
GB/T 1000.2-1988 standard:
P - type pin type insulator;
PQ1 - 1 type (reinforced insulation and type) pin type insulator;
PQ2 - reinforced insulation type 2 (severe pollution type) needle type insulator;
"-" digital rated voltage value, kV;
B - the tank above the porcelain part, in addition to the burning surface, the entire semiconductor glaze;
T with feet, iron shoulder;
L - without feet, porcelain and foot threaded connection;
LT with feet, porcelain and foot threaded connection, iron;
T number 16, 20 said lower thread diameter.
