Description

Technical Parameters

Certification

3.8/6.6 Kv Anti-Termite Medium Voltage Underwater Cable

Medium voltage underwater cable has a longitudinal waterproof design, which is an important measure to prevent moisture from penetrating along the cable for a long time. By designing waterproof tape or other materials between the inner layer and the outer sheath of the cable, it can effectively prevent moisture from penetrating into the cable and prevent electrical failures caused by moisture. Especially in humid environments, this design can significantly improve the safety and stability of the cable and avoid short circuits or insulation failures caused by moisture.

Operating temperature: -25°C to +90°C

Emergency operating temperature: 105°C

Max. Short Circuit Temperature: 250°C

Application

3.8/6.6 kV anti-termite medium voltage underwater cable is specifically engineered for wetland, coastal, and river-crossing power projects where cables are laid in environments exposed to both water immersion and biological threats. In Oceania, termites often attack the polymer cable sheaths in wetland or riverbank installations. This specialized cable features integrated termite protection in the outer sheath, ensuring long-term safe operation even when buried in soil or submerged near the coastline.

Feature

• Conductor: Stranded Compacted Circular aluminium conductor as per AS/NZS 1125

• Conductor Screen: Extruded Semi-conductive compound

• Insulation: XLPE

• Insulation Screen: Extruded Semi-conductive compound

• Longitudinal Water blocking: Water blocking tape above and below copper screen (Optional)

• Metallic Insulation Screen: Copper Wire Screen + helically applied copper tape

• binder tape/sheath over assembled cores

Composite sheath

• Inner layer: Extruded Polyvinyl Chloride, Colour: Orange

• Termite Protection: Polyamide (Nylon -12)

• Outer layer: HDPE (Black)

Certification

Medium voltage cable has obtained SAA certification, with certification numbers: SAA242046 and SAA250307 (available on the certification website). Traceability is crucial for project quality assurance. Each cable is verified by its certification number and batch label, providing projects with peace of mind in tracking compliance records. Certified cables fully comply with the Australian regulatory environment. Greater Wire offers quality assurance support and project efficiency with every SAA certified cable.

Package

sta power cable package

Factory

Dongguan Greater Wire & Cable Co., Ltd., is located in Dongguan City, Guangdong province. It integrates R&D, production, sales and maintenance, focusing on various wires and cables, and providing customized solutions for large-scale infrastructure such as airports, hospitals, factories, and schools in many regions around the world. With advanced production equipment and processes, complete testing equipment, and strong technical strength, the company has developed rapidly after years of hard work and the support of global customers, and has won a high reputation and market share in overseas markets.

Case

Company cases

Partner

greater wire Partner

FAQ

Q: What is a termite-resistant medium voltage underwater cable?

A: Termite-resistant medium voltage underwater cable is a cable specially designed for underwater environment, with termite-resistant performance and suitable for use in humid and flooded environments.

Q: Why do we need anti-termite properties?

A: In underwater environments, termites and other organisms may cause damage to cables. Anti-termite properties can extend the service life of cables and ensure safety.

Q: How much mechanical pressure can the cable withstand underwater?

A: The mechanical pressure that the cable can withstand underwater depends on many factors, including the design, material, diameter and installation method of the cable. Underwater cables are usually made of pressure-resistant materials and reinforced designs, which can withstand relatively high mechanical pressure. Underwater, the mechanical pressure mainly comes from the weight of water. The greater the water depth, the greater the pressure. Generally, the water pressure increases by about 0.1 megapascals (MPa) for every additional meter of water depth. Cable manufacturers usually perform pressure tests according to international standards to ensure that the cable can still work properly at a specific depth. Since cables from different manufacturers and models may differ in design and material, it is recommended to consult the manufacturer or supplier directly to obtain specific pressure bearing capacity data when selecting cables.

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Anti-Termite 3 core MV Cable

Anti-Termite 3C MV power Cable

No. of Cores	Core Cross sectional Area	Nominal Diameter
No. of Cores	Core Cross sectional Area	Under metallic screen	Under metallic screen	Overall
No.	mm2	mm	mm	mm
3	16	12.8	14.3	35.0
3	25	14.1	15.6	38.0
3	35	15.1	16.6	40.0
3	50	16.2	17.7	43.0
3	70	17.8	19.3	47.0
3	95	19.4	20.9	50.0
3	120	21	22.5	54.0
3	150	22.3	23.8	57.0
3	185	24	25.5	61.0
3	240	26.5	28.0	67.0
3	300	29.1	30.6	72.0
3	400	32.2	33.7	80.0
3	500	36	37.5	89.0

• Above mentioned parameters are based on 3k A/sec earth fault current capacity of copper screen

ELECTRICAL CHARACTERISTICS:

No.of Cores	Core Cross sectional Area	Max. DC Resistance at 20˚C	Max. AC Resistance at 90˚C	Approx. Capacitance	Approx. Inductance	Approx. Reactance	Continuous Current Rating
No.of Cores	Core Cross sectional Area	Max. DC Resistance at 20˚C	Max. AC Resistance at 90˚C	Approx. Capacitance	Approx. Inductance	Approx. Reactance	Buried direet in ground	In a buried duct	In Air
No.	mm2	Ω/km	Ω/km	µF/km	mH/km	Ω/km	Amps
3	16	1.91	2.449	0.22	0.618	0.194	78	67	84
3	25	1.2	1.539	0.25	0.586	0.184	100	87	110
3	35	0.868	1.113	0.28	0.565	0.177	119	103	132
3	50	0.641	0.822	0.31	0.548	0.172	140	122	158
3	70	0.443	0.568	0.36	0.518	0.163	171	150	196
3	95	0.32	0.411	0.4	0.503	0.158	203	179	236
3	120	0.253	0.325	0.45	0.487	0.153	232	205	273
3	150	0.206	0.265	0.49	0.479	0.150	260	231	309
3	185	0.164	0.211	0.53	0.470	0.148	294	262	355
3	240	0.125	0.161	0.58	0.459	0.144	340	305	415
3	300	0.1	0.129	0.6	0.452	0.142	384	346	475
3	400	0.778	0.101	0.62	0.447	0.140	438	398	552
3	500	0.0605	0.079	0.66	0.439	0.138	505	460	646

*: Current Ratings are based on IEC 60502-2 & IEC 60287, Max. Conductor Temperature at 90℃, Ambient temperature at 30℃ in Air / at 20℃ in Ground, Thermal resistivity of Soil 1.5 k.m/W & for earthenware ducts 1.2k.m/W and Depth of Laying 0.8m.

Current rating de-rating factors for other than 30℃ ambient air temperature.

20	25	35	40	45	50	55	60
1.08	1.04	0.96	0.91	0.87	0.82	0.76	0.71

Current rating de-rating factors for other than 20℃ ground temperature.

10	15	25	30	35	40	45	50
1.07	1.04	0.96	0.93	0.89	0.85	0.80	0.76

No.of Cores	Core Cross sectional Area	Max. pulling tension on conductor	Charging Current per phase	Zero sequence impedance	Electric Stress at Conductor Screen	Short circuit rating of Phase conductor
No.	mm²	kN	Amps/Km	Ohms/Km	kV/mm	kA, I sec
3	16	0.8	0.26	3.61	2.1	1.4
3	25	1.25	0.3	2.70	2.0	2.3
3	35	1.75	0.33	2.27	2.0	3.1
3	50	2.5	0.37	1.98	1.9	4.5
3	70	3.5	0.43	1.73	1.9	6.2
3	95	4.75	0.48	1.57	1.8	8.5
3	120	6	0.54	1.48	1.8	10.7
3	150	7.5	0.58	1.42	1.8	13.4
3	185	9.25	0.63	1.37	1.7	16.5
3	240	12	0.69	1.32	1.7	21.4
3	300	15	0.72	1.29	1.5	26.8
3	400	20	0.74	1.26	1.4	35.5
3	500	25	0.79	1.24	1.3	44.7

MV Cable

MV cable 02