This standard specifies the classification, technical requirements, testing method, inspection rules, mark, package, transport and storage of low voltage binding post of explosion-proof electrical apparatus made from Grade A arc-resistant insulating material.
This standard is applicable to d I, d II Grade B low voltage binding post of explosion-proof electrical apparatus with rated voltage to 1140V, rated current to 630 A, frequency to 50Hz.
This standard is not applicable to the binding post of direct drawing in system explosion-proof electrical apparatus.
2 Normative References
GB 998 Basic Testing Methods of Low Voltage Electric Apparatus
GB 1411 Solid Electric Insulating Materials--Test Methods of High-voltage Small-current Intermittent Arc Resistance
GB 1497 the Basic Standard for Low-voltage Apparatus
GB/T 1804 General Tolerances Tolerances for Linear Dimensions Without Individual Tolerance Indications
GB/T 2423.4 Basic Environmental Testing Procedures for Electric and Electronic Products Test Db: Damp Heat, Cyclic
GB 3836.2 Electrical Apparatus for Explosive Atmospheres Flameproof Electrical Apparatus “d”
GB 3836.3 Electrical Apparatus for Explosive Atmospheres Increased Safety Electrical Apparatus “e”
GB 4207 Method for Determining the Comparative and the Proof Tracking Indices of Solid Insulating Materials under Moist Conditions
JB 834 Environmental Technical Requirements of Low-voltage Appliance for Tropical Use
JB 4159 General Technical Requirements for Electric Products in the Tropics
3 Product Classification
3.1 Single core terminals
3.1.1 Cylindrical mounted terminals
3.1.1.1 Variety and specification
According to the classification of rated insulation voltage Ui, conducting rod ,thread sizes and incoming line mode be provided with twenty varieties; See Table 1 " △":
