Welded corrugated aluminum sheathed cable

ZTT MV underground power cables have excellent electrical properties, intended for use in power transmission and distribution substation systems with an industrial frequency rated voltage of 6-35kV, with special features on request like flame-retardant, water blocking, anti-termite, etc.

This type of cables are generally laid indoors, in tunnels and cable trenches without externally mechanical force.

STANDARD TAXNOMY

Cables are offered accords with different standards, IEC60840, IEC 62067, AS/NZS.

CONSTRUCTION

Conductor: Copper/aluminum wire, stranded circular or segmental compacted
Conductor screen: Extruded semiconducting layer
Insulation: Cross-linked polyethylene(XLPE)
Insulation screen: Extruded semiconducting layer
Armor: Smooth aluminum sheath
Outer sheath: HPDE or PVC
Semi-conductive layer: Coated with graphite or extruded semiconducting layer

CHARACTERISTCS

Benefits: Good corrosion resistant, high temperature resistant
Max. continuous temperature in operation: 90℃
Min. bending radius: 20 × OD

Parameter of some products

Rated voltage:38/66kV、36/66kV

Conductor Nominal Cross Section		mm2	240	300	400	500	630	800	1000	1200	1600	2000
Insulation thickness		mm	12	12	12	12	12	12	12	12	12	12
Approximate outer diameter		mm	72.5	74.7	77.2	80.4	83.9	88.8	97.3	102.2	108.9	114.7
Approximate weight		kg/m	6.6	7.3	8.2	9.5	11.1	13	16	18.1	22.3	26.6
Maximum DC resistance of conductor at 20℃		Ω/km	0.0754	0.0601	0.047	0.0366	0.0283	0.0221	0.0176	0.0151	0.0113	0.009
Maximum DC resistance of conductor at 90℃		Ω/km	0.097	0.0777	0.0613	0.0484	0.0384	0.031	0.0247	0.0218	0.0175	0.0151
Cable capacitance		μF/km	0.168	0.18	0.194	0.211	0.23	0.252	0.292	0.31	0.346	0.378
Cable inductance	Flat	mH/km	0.7615	0.7386	0.7154	0.6891	0.6639	0.6374	0.6054	0.5892	0.56	0.5399
Cable inductance	Trefoil	mH/km	0.4677	0.4507	0.4341	0.416	0.3992	0.3842	0.3705	0.3641	0.3475	0.3378
Reference Ampacity (Corrugated aluminum sheath)
In the air	Flat	A	645	739	854	990	1146	1307	1505	1623	1863	2044
In the air	Trefoil	A	579	659	755	866	988	1110	1273	1364	1533	1656
Buried	Flat	A	565	638	727	828	941	1053	1181	1255	1395	1490
Buried	Trefoil	A	515	579	655	739	828	915	1023	1082	1183	1252
In duct(Buried)	Flat	A	504	571	650	741	843	945	1066	1135	1264	1354
In duct(Buried)	Trefoil	A	486	550	627	715	812	910	1038	1110	1246	1351

Note: The above is only part of the product specifications and technical parameters, if you need detailed parameters, please contact our sales manager.

Interconnection of Dique substation and Tolosa substation in Argentina(Contractor: ENARSA)