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GB 12972.6-1991
Flexible rubber-sheathed cables for mining purposes--Part 6:Flexible cables with monitoringcore and semiconducting screens for rated voltage of 3.6/6kV
GB 12972.4-1991
Flexible rubber-sheathed cables for mining purposes--Part 4:Flexible coalcutter cables with indivdual metallic screens for rated voltage of 0.66/1.14kV
GB 12972.3-1991
Flexible rubber-sheathed cables for mining purposes--Part 3:Trailing coalcutter cables with monitoring core and semiconducting screens for rated voltage of 0.66/1.14kV
GB 12971.2-1991
Trolley and contact wires for electric traction--Part 2:Copper trolley and contact wires
GB 12971.1-1991
Trolley and contact wires for electric traction--Part 1:General
GB 12972.2-1991
Flexible rubber-sheathed cables for mining purposes--Part 2:Flexible coalcutter cables for rated voltages up to 0.66/1.14kV
GB 12972.5-1991
Flexible rubber-sheathed cables for mining purposes--Part 5:Flexible cables for rated voltage up to 0.66/1.14kV
GB 12940-1991
Technical specification for silver-graphite electrical contacts
GB/T 12826-1991
The calculation guide of the drum (reeling) cable’s current rating
GB 3836.12-1991
Electrical apparatus for explosive atmospheres--Classification ofgases or vapours with air according to their maximum experimental safe gaps andminimum igniting currents
GB 3836.11-1991
Electrical apparatus for explosive atmospheres--Method of test for ascertainment of maximum experimental safe gap
GB 12744-1991
Outdoor antipollution-type solid-core post insulators of ceramic material
GB 12528.1-1990
Insulated cables (wires) for railway vehicles of rated voltages up to and including 3 kV--General
GB 12527-1990
Aerial insulated cables of rated voltages up to and including 1 kV
GB 3836.9-1990
Electrical apparatus for explosive atmospheres--Encapsulated electrical apparatus “m”
GB/T 10593.3-1990
Methods of measuring environmental parameters for electric and electronic products--Treatment andinduction for the vibration data
GB 11920-1989
General specification of central control equipments for electrical parts in power stations and substations
GB/T 10698-1989
Expansible graphite
GB/T 10978.2-1989
Lead acid batteriesfor special type explosion proof power unit in coal mine--Product types and specification
GB/T 11023-1989
Test guide of SF6 gas tightness for high-voltage switchgear