Marine cable laboratory has 3600 square meters of indoor testing room and 3000 square meters of outdoor test site. It is equipped with many sets of high-voltage test systems such as power frequency series resonant set, DC voltage generator, and impulse voltage generator, etc. It is capable of testing dimensions measurement, mechanical properties, electrical properties, combustion properties, signal transmission properties, aging resistance, environmental resistance and material properties of many kinds of wires and cables. It provides test services such as type test, performance verification and pre-qualification test, etc. At the same time, it can carry out customized test according to customer requirements. The following categories of products can be tested in the laboratory: wires and cables for electrical equipment, power cables and accessories with rated voltage of 500kV and below, bare wires and their products, aerial insulated cables, optical fiber cables, communication cables, fire-resistant and flame-retardant cables, marine cables, mining cables, and raw materials for wires and cables, etc.

I. Wires and Cables for Low-Voltage Electrical Appliances and Equipments

DC resistance of conductors test, insulation resistance test, measurement of thickness and overall dimensions, tests for determining the mechanical properties of insulation and sheath, ageing in an air oven, ageing in an air/oxygen bomb, water absorption test, shrinkage test, test at low temperature, hot set test, ozone resistance test, pressure test at high temperature, resistance to cracking test, loss of mass test, thermal stability test, flexing test, wear resistance test, bending test and kink test.

II. Power Cables and Their Accessories

AC voltage test, partial discharge test, impulse test, DC voltage test, heating cycle test, measurement of capacitance, tanδ measurement, water penetration test, prequalification test, etc.

III. Bare Wires and Their Products

Tensile test, torsion test, mandrel winding test, test for continuity of coating, test for adherence of coating, test of electrical resistivity of metallic materials, etc.

IV. Flame-Retardant and Fire-Resistant Cables

Tests for vertical flame spread of vertically-mounted bunched wires or cables, test for vertical flame propagation for a single insulated wire or cable, tests for electric or optical fibre cables under fire conditions-Circuit integrity, measurement of smoke density of cables burning under defined conditions, determination of the amount of halogen acid gas, determination of degree of acidity of gases by measuring pH and conductivity, determination of low levels of fluorine, etc.

V. Cables for Digital Communication and Coaxial Cables

Tests of low-frequency electrical properties of cables including DC resistance, resistance unbalance of conductors, mutual capacitance of a pair, pair to earth capacitance unbalance and other high-frequency transmission properties including attenuation, near-end crosstalk loss, far-end crosstalk loss, characteristic impedance, return loss.

VI. Optical Fiber

Tests for transmission properties of optical fibres, such as cladding diameter, cladding non-circularity, core diameter, core non-circularity, core-cladding concentricity error and other geometric parameters，attenuation, cut-off wavelength, chromatic dispersion, mode field diameter.

VII. Rubber and Plastic Materials for Cables

Measurement of the melt flow index, thermal stability test, determination of burning behaviour by oxygen index, determination of Vicat softening temperature (VST), measurement of carbon black content, determination of the brittleness temperature by impact, shore hardness measurement, etc.