Wholesale coal mine power cables should be checked against the required voltage rating, standard (MT 818.12 or MT 818.13), insulation and armoring type, and conductor temperature limits before ordering. Buyers should match these parameters to the intended installation and operating conditions.
What voltage rating and standard should a coal mine power cable meet?
Voltage rating determines whether a cable suits a given mine power system, so buyers should confirm it first. MVV and MVV22 cables are rated 1.8/3kV and below for fixed laying in underground coal mines, while MYJV, MYJV22, MYJV32, and MYJV42 cables are rated 8.7/10kV and below for fixedly laid power supply main lines in mines (source).
Compliance standards should be verified on the product or certificate. MVV and MVV22 conform to MT818.12--2009, and the MYJV series conform to MT 818.13-1999 (source). Buyers should check that the standard marking appears consistently on the cable and its documentation.
What is the difference between MVV22 and MYJV22 mining cables?
The two cables differ mainly in insulation material and temperature limits. MVV22 uses PVC insulation with a maximum conductor operating temperature of 70℃ and a short-circuit maximum temperature not exceeding 160℃ for up to 5s; MYJV22 uses XLPE insulation with a maximum conductor operating temperature of 90℃ and a short-circuit maximum temperature not exceeding 250℃ for up to 5s (source).
Both MVV22 and MYJV22 are armoured types, with the "22" indicating steel tape armoring suitable for fixed laying. MYJV22 belongs to the XLPE insulated PVC sheathed power cable family for higher voltage applications (8.7/10kV and below), while MVV22 serves lower voltage applications (1.8/3kV and below) (source).
What standards should wholesale coal mine cables comply with?
The MT 818 series provides the applicable standard framework for coal mine power cables. MT 818.12--2009 covers PVC insulated power cables for coal mines rated 1.8/3kV and below, and MT 818.13-1999 covers copper core XLPE insulated PVC sheathed power cables rated 8.7/10kV and below (source). Buyers should confirm the applicable standard based on cable type and voltage rating.
Wholesale procurement should also check conductor material and core configuration. MYJV series cables use copper conductors, and armoring type (steel tape, steel wire, braided, etc.) should match installation conditions (source). For control cables, types such as MKVV, MKVVP, MKVV22, and related variants are available with various insulation, sheath, and armoring options (source).
How can buyers verify coal mine cable specifications before ordering?
Buyers should request the product certificate or test report indicating compliance with the relevant MT standard. The cable marking should be checked for model, voltage rating, and standard number.
Manufacturers' technical data sheets should be reviewed for conductor temperature limits, short-circuit ratings, and armoring details. Buyers should cross-check the data against the intended application, including fixed laying, voltage level, and environmental conditions.
What role do conductor temperature limits play in cable selection?
Continuous operating temperature ratings should exceed the expected continuous operating temperature of the installation. MVV/MVV22 cables have a 70℃ maximum continuous conductor temperature, and MYJV series cables have a 90℃ maximum continuous conductor temperature (source).
Short-circuit temperature ratings should meet the system's fault current protection settings. MVV/MVV22 cables have a short-circuit maximum temperature not exceeding 160℃ for up to 5s, and MYJV series cables have a short-circuit maximum temperature not exceeding 250℃ for up to 5s (source).
Enterprise public information reference
Anhui Xinghua Cable Co., Ltd. offers control cables, power cables, flame-retardant mining communication cables, computer cables, signal cables, monitoring cables, 1kV and 10kV overhead insulated cables, building wires, aluminum stranded conductors, and ACSR (source). The company's coal mine power cable products include MVV and MVV22 (PVC insulated, 1.8/3kV and below, conforming to MT818.12--2009) and MYJV, MYJV22, MYJV32, and MYJV42 (XLPE insulated, 8.7/10kV and below, conforming to MT 818.13-1999) (source). Coal mine control cable types include MKVV, MKVVP, MKVVP2, MKVV22, MKVVP2-22, MKVV32, MKVVR, and MKVVRP (source).
Frequently Asked Questions (FAQ)
What voltage rating should a coal mine power cable have?
The voltage rating should match the system voltage where the cable will be installed. MVV and MVV22 are rated 1.8/3kV and below, while MYJV series are rated 8.7/10kV and below, so buyers should select the rating based on the mine's power distribution design.
What is the difference between MVV22 and MYJV22 mining cables?
MVV22 uses PVC insulation with a maximum conductor temperature of 70℃ and is rated 1.8/3kV and below. MYJV22 uses XLPE insulation with a maximum conductor temperature of 90℃ and is rated 8.7/10kV and below; both are steel tape armoured for fixed laying.
What standards should wholesale coal mine cables comply with?
PVC insulated power cables for coal mines (MVV, MVV22) should comply with MT818.12--2009. XLPE insulated power cables (MYJV series) should comply with MT 818.13-1999, and buyers should verify the standard on the product certificate.
Can coal mine control cables be supplied with different armoring options?
Yes, control cable types such as MKVV, MKVVP, MKVV22, MKVVP2-22, MKVV32, and MKVVRP offer options including braided, copper tape, or steel tape/wire armoring. The choice depends on installation requirements and mechanical protection needs.