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Classification of power cables
2019-02-27
1 The conductor structure of large-size PVC insulated cables is generally fan-shaped, and the rated working temperature of thermoplastic cables is 70 ℃
Representative product model: VV VLV VY VV22 VLV22 VV23 VV32 VV33 VVV42 VV43 etc
2 cross-linked polyethylene insulated cable thermosetting cable rated working temperature: 90 ℃
The operating temperature and short-circuit operating temperature have been greatly improved: the operating temperature has increased from 70
90 ℃ Short-circuit working temperature (5 seconds) 250 ℃ from 160
For low-voltage cables, fan-shaped conductors are mainly used. For medium and high-voltage cable conductors, the highest voltage level of circular conductors is 220kV
Representative product model: YJV YJLV YJY YJV22 YJLV22 YJV23
YJV32 YJV33 YJV42 YJV43 etc
3 Natural styrene-butadiene rubber insulated cables are used in very few occasions, the main model is XLQ XQ XQ21 XQ20 XV XV22
4 viscous oil paper insulated cable has been less used, will be eliminated
5 oil-filled cable is still the main variety of high voltage, especially ultra-high voltage cable
6 Overhead insulated cables are mostly used for single cores, and 3-4 cores are twisted into bundles called cluster cables.
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