CableDataSheet, Cable and Wire Technical Consulting Service

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Standard covering flexible trailing cables for use in mines and quarries.

BS6708 reference BS6708 Type 7, Type 7M, Type 7S BS6708 Type 11 BS6708 Type 20 BS6708 Type 21 BS6708 Type 62, 63,64 BS6708 Type 201 and Type 211 BS6708 Type 307 (includes 307M and 307S) BS6708 Type 321 and Type 331 BS6708 Type 621 and Type 631 BS6708 Type 506, Type 512, Type 518 & Type 524

Voltage Rating 640/1100V 640/1100V 640/1100V 640/1100V 640/1100V 640/1100V 1.9/3.3kV 1.9/3.3kV 3.8/6.6kV 320/550V

Flexible Trailing Cable Application For use on equipment including excavators, coal-cutters and crushing machines. For use with shuttle cars, coal cutters and at-face equipment For the supply of heavy-duty machinery used for excavating and crushing applications (3 core cables) For the supply of heavy-duty machinery used for excavating and crushing applications (4 core cables) Trailing cable with pliable galvanised steel wire armouring for mine roadway extension cables and mechanically protected cables in quarries and coal face lighting Trailing cable with pliable galvanised steel wire armouring for mine roadway extension cables and mechanically protected cables in quarries and coal face lighting For use on equipment including excavators, coal cutting and crushing machinery Trailing cable with pliable galvanised steel wire armouring for mine roadway extension cables and mechanically protected cables in quarries and coal face lighting Trailing cable with pliable galvanised steel wire armouring for heavy-duty equipment Flexible multicore auxilliary cables with galvanised steel pliable wire armouring to provide remote control circuits and for the interconnection between mechine sections and associated auxilliary equipment

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Znergy Cable ( ARYUV PTY LTD )


About Znergy Cable

Znergy Cable is a global electrical component, electrical cable, solar & renewable energy component manufacturer. It is proudly a part of the Aryam Australia Group. Invested with cutting edge technology, we manufacture Low Voltage to High Voltage and any specialist cables in Mining, Fire, LSZH, Shipping, Instrumentation, Oil & Petro-chemical, Gas, Solar, Undersea submersible and industrial cables. Boasting advanced capabilities in technology, Znergy Cable manufactures cables for nuclear plants, space agency projects and boasts HV capabilities up to 512KV. The plants manufacture cables for many Australian, European and American cable manufactures under an OEM agreement


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What is a trailing or reeling cable?

Trailing and reeling cables are electrical power cables for mobile apparatus, such as large excavators, draglines, stackers and reclaimers. The cable allows the mobile apparatus to move without disconnecting its electric power supply.

A reeling cable is specifically designed to be frequently reeled on and off a cable drum or reeler (e.g. an iron ore rail-mounted reclaimer), whereas a trailing cable is specifically designed to be moved with the mobile apparatus (e.g. a coal mine dragline, mineral sands mobile processing plant).


large excavators



coal mine dragline


stackers



Stacker-Reclaimer



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Epaflex Polyurethanes Spa

Epaflex was established in 1991 as a system house specialised in the production of polyurethane systems for the footwear industry. Over the years, Epaflex's business has expanded further and diversified, first with the second line of products, Thermoplastic polyurethane (TPU) granules and then with the production of Polyureas, Polyaspartates, Prepolymers and spray foams for insulation. Together with Elachem SpA, Epaflex forms part of an industrial group which recently set up a major chemical plant for the production of resins.
All of the polyesters used for Epaflex spray foams are produced by Elachem to permit precise control of the quality of the raw materials and a level of competitiveness to meet the needs of the market.



Address

Via Circonvallazione Est, 8,
27023 Cassolnovo PV, Italia

Contacts

Tel: (+39) 0381 929521
Fax: (+39) 0381929523


Email
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What is the AC Hi-Pot Testing?

Cables and cable accessories can also be field tested with 60 Hz AC voltage, even though this is typically not done because of the requirement for heavy and costly test equipment that may not be available or transportable to a field site. The typical field tests done on cables are DC hi-pot or VLF tests, such as one-tenth of hertz
frequency tests in lieu of AC hi-pot tests. Nevertheless, if AC hi-pot acceptance and maintenance tests are to be done on power cables, then it needs to be kept in mind that this test is not very practical in the field. Also, the AC hi-pot test can only be completed as a go-no-go test. Hence, it may create extensive damage in the case the cable under test fails. On the other hand, the AC hi-pot test has a distinct benefit over other tests that stress the insulation comparably to the normal operating voltage. Also, this test replicates the factory test completed on the new power cable. When completing the AC 60 Hz hi-pot test attention needs to be given to the adequacy of the test equipment for successfully charging the test specimen. The AC test equipment needs to have proper volt-ampere (VA) capacity to provide the needed cable charging current requirements of the tested cable. The VA capacity of the AC hi-pot test equipment can be calculated with the following formula:

𝑉𝐴 = 2𝜋𝑓𝑐𝐸^2 or 𝑘𝑉𝐴 = 2𝜋𝑓𝑐𝐸^2 × 10^−3

where

c is capacitance (μf/mile)
f is the frequency (Hz)
E is the test voltage (kV) of the test set
The test voltage values suggested for acceptance and maintenance tests are 80%
and 60%, respectively, of the final factory test voltage.

Conditioning - All the test specimens shall be kept at a temperature of 27 f 2°C for a period
of not less than 16 h Immediately before test.

Procedure

8.1 The distance between marker lines shall be measured.

8.2 The test pieces shall be suspended in the oven and weights attached to the bottom grips to
exert a force of the value specified for the material in the relevant cable standard.

8.3 After 15 min in the oven at 'the temperature specified for the material in the relevant cable
standard, the distance between the marker lines shall be measured. If the oven does not have a
window and the oven door needs to be opened to make the measurement, the measurement shall
be made not more than 30 s after opening the door.
fin the case of dispute the test shall be carried out in an oven with a window and the measure-
ment made without opening the door.

8.4 The tensile force shall then be removed from the test piece (by cutting the test piece at the
lower grip), and the test piece left to recover for 5 min at the specified temperature.

3.5 The test pieces shall then be removed from the oven and allowed to cool slowly to ambient
temperature, after which the distance between the marker lines shall be measured again.


Calculation
The percentage hot set elongation = (B-A)/A x 100
Permanent set percent = (C -A)/A x 100

initial Length Length of the Gauge mark A, mm
Between the Mark after 15 Min with load Gauge Mark B, mm
Length of the Gauge Mark at Room Temperature after Test, C mm