GB/T 12976.2-2008Paper-insulated power cables and their accessories with rated voltages up to and including 35kV -- Part 2: General and construction requirements for power cables with rated voltages 35kV (English PDF)

GB/T 12976.2-2008 is the English-translated version of 额定电压35kV(Um=40.5kV)及以下纸绝缘电力电缆及其附件 第2部分：额定电压35kV电缆一般规定和结构要求.

GB/T 12976.2-2008 — 1.1 GB/T 12976 provisions of this part of the rated voltage 21/35kV, 26/35kV (Um = 40.5kV) copper or aluminum impregnated paper must General provisions edge lead sheathed power cable (excluding gas - pressure and oil-filled cables) and structural requirements.

GB/T 12976 in this section applies to the rated voltage 21/35kV, 26/35kV (Um = 40.5kV) copper or aluminum impregnated paper must Edge lead sheathed power cables (excluding gas - pressure and oil-filled cables).

Submarine cables and special purpose cable, not included in this section. NOTE. Test methods and the corresponding requirements set out in the first part. 1.2 The maximum allowable operating temperature Table 1 to a temperature suitable for viscous oil impregnated and not trickle impregnation.

When such other maximum permissible continuous operating temperature, test temperature should be adjusted accordingly.

Table 1 insulated conductors of different voltage and maximum temperature Cable's rated voltage (U0/U) /kV Highest voltage for equipment Um /kV Maximum conductor temperature to allow normal operation no trickle of oil-impregnated cable /Viscous oil impregnated cable /21/35 40.5 6560 26/35 40.5 6560 Note 1.

The use of viscous oil impregnated in this table applies only to a temperature substantially horizontal cable buried in the soil. Note 2. For use not trickle impregnation, suitable for vertical cable laying occasions.

Note 3. If the cable buried in the soil to allow continuous operation at maximum conductor temperature (100% load factor), the soil surrounding the cable may vary depending on the starting resistance Since the time the soil dries leaving the thermal resistance becomes large.

Therefore, the conductor temperature may significantly exceed the maximum allowable value, if the expected presence of such operating conditions, should Take appropriate measures.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 13 pages — is available in the English PDF.

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