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Single Core Medium Voltage Power Cable to IEC 60502 1

Single Core Medium Voltage Power Cable to IEC 60502 4

Single Core Medium Voltage Power Cable to IEC 60502

Single Core Medium Voltage Power Cable to IEC 60502 are designed for distribution of electrical power with nominal voltage Uo/U ranging from 1.8/3KV to 26/35KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations.

Standard IEC 60502 Part 1(1.8/3KV) IEC 60502 Part 2(3.6/6KV to 18/30KV)

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Construction

Technical Specifications

Quality Control

Application

Construction

Single Core Medium Voltage Power Cable to IEC 60502

Conductor

Copper or Aluminium conductor,round standed or Compacted,Class2 to IEC 60228,BS EN 60228.For smaller sizes,solid conductor, Class 1 as per IEC 60228, BS EN 60228 can also be supplied upon request.

Insulation

Insulation is of polyvinyl chloride (PVC) intended for 1.8/3KV and 3.6/6KV Power Cable cross-linked polyethylene compound (XLPE) or ethylene propylene rubber (EPR/HEPR)

Conductor Screen

The conductor screen consists of an extruded layer of non metallic, semi-conducting compound firmly bonded to the insulation to exclude all air voids. The conductor screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and 3.6/6KV Power Cable.

Armour (for armored cable)

The Armour consists of round aluminum wire amour applied helically over an extruded separation sheath.

Metallic Layer

The metallic layer may be applied over the individual cores or the core assembly collectively.
The following types of metallic layers are provided:
1) Metallic Screen
2) Concentric Conductor
3) Metallic Sheath
4) Metallic armor

Separation Sheath (for armored cable)

The separation sheath comprises a layer of extruded PVC, PE or LSZH, applied under the armor .The nominal thickness is calculated by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. For Power Cable without a lead sheath, the nominal separation sheath thickness shall not be less than 1.2mm. For Power Cable where the separation sheath is applied over the lead sheath, the nominal separation sheath thickness shall not be less than 1.0mm.

Lapped Bedding (for armored lead sheathed cable)

The lapped bedding consists of either impregnated/synthetic compounded paper tapes or a combination of two layers of these paper tapes followed by a few layers of compounded fabulous materials. The thickness is around 1.5mm.

Insulation Screen

The insulation screen consists of an extruded layer of non metallic, semi-conducting compound extruded over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. As an option, a semi-conducting tape may be applied over the extruded semi-conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. The insulation screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and 3.6/6KV Power Cable. The screen may be covered by semi-conductive water blocking swellable tape to ensure longitudinal watertightness.

Over Sheath

Overall sheath comprises a layer of extruded thermoplastic compound (PVC,PE or LSZH can be offered as an option.) or elastomeric compound (polychlorprene CSP or chlorosulfonated PE). The nominal oversheath thickness is calculated by 0.035D+1 where D is the fictitious diameter immediately under the oversheath in mm. For unarmored Power Cable and Power Cable with the oversheath not applied over the armor, metallic screen or concentric conductor, the nominal oversheath thickness shall not be less than 1.4mm. And for Power Cable with oversheath applied over the armor, metallic screen or concentric conductor, the nominal oversheath thickness shall not be less than 1.8mm.

Physical Proerties

Operating Temperature: up to 70°C (PVC insulation); up to 90°C (XLPE or EPR insulation)
Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature( 5 seconds maximum duration ): 140-160°C (PVC insulation) 250°C (XLPE or EPR insulation)
Bending Radius: 12 x OD

Technical Specifications

Single Core Medium Voltage Power Cable to IEC 60502

Single Core 3.6/6KV (Um=7.2KV)

Single Core 6/10KV (Um=12KV)

Single Core 8.7/15KV (Um=17.5KV)

Single Core 12/20KV (Um=24KV)

Single Core 18/30KV (Um=36KV)

Single Core 21/35KV (Um=42KV)

Single Core 26/35KV (Um=42KV)

Single Core 1.8/3KV(Um=3.6KV) to 26/35KV(Um=42KV) XLPE Insulation

Single Core 1.8/3KV(Um=3.6KV) to 26/35KV(Um=42KV) EPR Insulation

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
10	2.5	0.1	16	1.8	16	320	260	1.2	1.6	1.8	22	610	550
16	2.5	0.1	16	1.8	16	390	290	1.2	1.6	1.8	22	680	580
25	2.5	0.1	16	1.8	18	500	340	1.2	1.6	1.8	23	810	660
35	2.5	0.1	16	1.8	19	610	400	1.2	1.6	1.8	24	940	730
50	2.5	0.1	16	1.8	20	750	450	1.2	1.6	1.8	26	1100	810
70	2.5	0.1	16	1.8	22	970	550	1.2	1.6	1.8	27	1350	930
95	2.5	0.1	16	1.8	23	1250	660	1.2	1.6	1.9	29	1670	1080
120	2.5	0.1	16	1.8	25	1500	760	1.2	1.6	1.9	31	1950	1200
150	2.5	0.1	25	1.8	26	1790	860	1.2	1.6	2	32	2270	1350
185	2.5	0.1	25	1.8	28	2160	1000	1.2	2	2.1	35	2770	1620
240	2.6	0.1	25	1.9	31	2770	1250	1.2	2	2.2	38	3440	1930
300	2.8	0.1	25	2	34	3400	1500	1.2	2	2.2	41	4120	2210
400	3	0.1	35	2.1	38	4280	1850	1.3	2.5	2.4	46	5250	2820
500	3.2	0.1	35	2.1	41.5	5325	2240	1.4	2.5	2.6	50	6550	3520
630	3.2	0.1	35	2.2	45.3	6745	2750	1.5	2.5	2.7	56	7960	4020
800	3.2	0.1	50	2.4	49.4	8290	3310	1.5	2.5	2.8	59	9660	4820
1000	3.2	0.1	50	2.5	54.2	10256	3990	1.5	2.5	3	63	11690	5540

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
16	3.4	0.1	16	1.8	18	450	350	1.2	1.6	1.8	24	770	670
25	3.4	0.1	16	1.8	20	560	400	1.2	1.6	1.8	25	910	750
35	3.4	0.1	16	1.8	21	680	460	1.2	1.6	1.8	26	1040	820
50	3.4	0.1	16	1.8	22	810	520	1.2	1.6	1.8	28	1190	900
70	3.4	0.1	16	1.8	24	1050	620	1.2	1.6	1.9	29	1470	1040
95	3.4	0.1	16	1.8	25	1320	730	1.2	1.6	2	31	1780	1190
120	3.4	0.1	16	1.8	27	1580	840	1.2	2	2	34	2150	1410
150	3.4	0.1	25	1.9	28	1880	960	1.2	2	2.1	35	2480	1560
185	3.4	0.1	25	1.9	30	2250	1100	1.2	2	2.1	37	2890	1730
240	3.4	0.1	25	2	33	2870	1350	1.2	2	2.2	40	3570	2050
300	3.4	0.1	25	2.1	35	3490	1580	1.2	2	2.3	42	4230	2330
400	3.4	0.1	35	2.2	39	4350	1920	1.3	2.5	2.4	47	5320	2890
500	3.4	0.1	35	2.2	39.9	5325	2240	1.4	2.5	2.5	51	6510	3530
630	3.4	0.1	35	2.3	43.7	6675	2765	1.5	2.5	2.6	56	7960	4050
800	3.4	0.1	50	2.5	48.6	8225	3330	1.5	2.5	2.7	59	9670	4850
1000	3.4	0.1	50	2.6	52.9	10210	4030	1.6	2.5	2.9	63	11710	5570

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
25	4.5	0.1	16	1.8	22	640	480	1.2	1.6	1.8	28	1020	860
35	4.5	0.1	16	1.8	23	760	540	1.2	1.6	1.9	29	1170	950
50	4.5	0.1	16	1.8	24	900	610	1.2	1.6	1.9	30	1340	1040
70	4.5	0.1	16	1.8	26	1140	710	1.2	1.6	2	32	1610	1190
95	4.5	0.1	16	1.8	27	1420	830	1.2	2	2.1	35	2020	1430
120	4.5	0.1	16	1.9	29	1700	950	1.2	2	2.1	36	2310	1570
150	4.5	0.1	25	1.9	31	1990	1070	1.2	2	2.2	38	2660	1740
185	4.5	0.1	25	2	32	2380	1230	1.2	2	2.2	39	3070	1920
240	4.5	0.1	25	2.1	35	3010	1490	1.2	2	2.3	42	3750	2240
300	4.5	0.1	25	2.1	37	3620	1720	1.3	2.5	2.4	46	4590	2690
400	4.5	0.1	35	2.2	41	4490	2070	1.3	2.5	2.5	49	5550	3120
500	4.5	0.1	35	2.3	43	5460	2460	1.3	2.5	2.6	52	6590	3600
630	4.5	0.1	35	2.4	48	6790	2590	1.4	2.5	2.7	57	8060	4110
800	4.5	0.1	50	2.6	52	8420	3570	1.5	2.5	2.8	61	9800	4970
1000	4.5	0.1	50	2.7	55	10330	4180	1.6	2.5	3	65	10850	5710

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
25	5.5	0.1	16	1.8	24	720	560	1.2	1.6	1.8	29	1200	980
35	5.5	0.1	16	1.8	25	840	620	1.2	1.6	1.9	30	1350	1070
50	5.5	0.1	16	1.8	26	990	690	1.2	2	2	33	1550	1250
70	5.5	0.1	16	1.8	28	1230	800	1.2	2	2.1	35	1840	1420
95	5.5	0.1	16	1.9	30	1530	940	1.2	2	2.1	37	2160	1570
120	5.5	0.1	16	2	31	1810	1050	1.2	2	2.2	38	2470	1730
150	5.5	0.1	25	2	33	2110	1190	1.2	2	2.2	40	2810	1890
185	5.5	0.1	25	2.1	35	2510	1360	1.2	2	2.3	42	3240	2090
240	5.5	0.1	25	2.1	38	3130	1610	1.3	2.5	2.4	45	4150	2580
300	5.5	0.1	25	2.2	40	3760	1860	1.3	2.5	2.5	48	4800	2890
400	5.5	0.1	35	2.3	43	4650	2220	1.4	2.5	2.6	52	5780	3350
500	5.5	0.1	35	2.4	46	5530	2545	1.5	2.5	2.7	55	6850	3850
630	5.5	0.1	35	2.5	50	6700	3100	1.5	2.5	2.9	55	8380	4400
800	5.5	0.1	50	2.6	55	8580	3690	1.6	2.5	3	64	10130	5270
1000	5.5	0.1	50	2.7	59	10620	4450	1.7	2.5	3.1	68	12180	6000

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
50	8	0.1	16	2	31	1250	960	1.2	2	2.2	38	1910	1640
70	8	0.1	16	2	34	1510	1090	1.2	2	2.3	41	2240	1820
95	8	0.1	16	2.1	35	1830	1240	1.2	2	2.3	42	2570	1980
120	8	0.1	16	2.1	37	2110	1360	1.3	2.5	2.4	45	3060	2310
150	8	0.1	25	2.2	38	2420	1510	1.3	2.5	2.5	47	3430	2510
185	8	0.1	25	2.2	40	2830	1680	1.3	2.5	2.5	50	3890	2720
240	8	0.1	25	2.3	43	3500	1980	1.4	2.5	2.6	52	4630	3120
300	8	0.1	25	2.4	45	4150	2250	1.4	2.5	2.7	54	5330	3430
400	8	0.1	35	2.5	49	5070	2640	1.5	2.5	2.8	58	6360	3930
500	8	0.1	35	2.6	52	5945	2965	1.6	2.5	2.9	61	7670	4490
630	8	0.1	35	2.7	56	7445	3555	1.7	2.5	3	65	8870	5020
800	8	0.1	50	2.8	61	9060	4180	1.9	2.5	3.2	69	10790	5980
1000	8	0.1	50	2.9	65	11140	4980	2	2.5	3.3	73	12860	6730

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
50	9.3	0.1	16	2	35.7	1526	1239	1.2	2	2.3	43.5	2331	2116
70	9.3	0.1	16	2.1	37.6	1809	1393	1.2	2.5	2.4	46.6	2680	2325
95	9.3	0.1	16	2.2	39.4	2123	1555	1.2	2.5	2.5	48.4	2981	2482
120	9.3	0.1	16	2.2	40.8	2405	1688	1.4	2.5	2.5	49.8	3487	2867
150	9.3	0.1	25	2.2	42.3	2733	1838	1.4	2.5	2.6	51.5	3870	3055
185	9.3	0.1	25	2.3	44.7	3216	2082	1.4	2.5	2.6	53.5	4420	3370
240	9.3	0.1	25	2.4	46.9	3766	2333	1.4	2.5	2.7	55.8	4981	3676
300	9.3	0.1	25	2.4	49.3	4408	2605	1.4	2.5	2.8	58.5	5661	3971
400	9.3	0.1	35	2.5	52.3	5473	3057	1.6	2.5	2.9	61.7	6865	4550

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Nom. Insulation Thickness	Copper Tape Thickness	Copper Wire Screen Area	Unarmoured Cables				Aluminium Wire Armoured Cables
				Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight		Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	Approx. Weight
				Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL	Nom. Bedding Thickness	Armour Wire Size	Nom. Sheath Thickness	Approx. Overall Diameter	CU	AL
mm²	mm	mm	mm²	mm	mm	kg/km		mm	mm	mm	mm	kg/km
50	10.5	0.1	16	2.1	38.3	1689	1402	1.2	2.5	2.5	46.8	2580	2395
70	10.5	0.1	16	2.2	40.2	1980	1564	1.2	2.5	2.5	48.8	2937	2611
95	10.5	0.1	16	2.2	41.8	2283	1714	1.2	2.5	2.6	50.9	3206	2737
120	10.5	0.1	16	2.3	43.4	2588	1871	1.4	2.5	2.6	51.5	3753	3177
150	10.5	0.1	25	2.3	44.9	2923	2028	1.4	2.5	2.7	53.8	4143	3371
185	10.5	0.1	25	2.4	47.3	3415	2281	1.4	2.5	2.7	55.6	4694	3693
240	10.5	0.1	25	2.5	49.6	3975	2542	1.4	2.5	2.8	57.6	5258	4005
300	10.5	0.1	25	2.5	51.9	4625	2822	1.4	2.5	2.9	60.8	5940	4301
400	10.5	0.1	35	2.6	54.9	5704	3288	1.6	2.5	3	63.6	7155	4894

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as

Nom. Cross - Section Area	Buried direct in Ground				Laid in Single Way Duct				Laid in Air
	Trefoil		Flat spaced		Trefoil		Flat Touching		Trefoil		Flat Touching		Flat spaced
	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL
mm²	A		A		A		A		A		A		A
10	84	59	87	62	78	55	98	56	103	75	106	77	122	88
16	109	84	113	88	103	80	104	81	125	97	128	99	150	116
25	140	108	144	112	132	102	133	103	163	127	167	130	196	153
35	166	129	172	134	157	122	159	123	198	154	203	157	238	185
50	196	152	203	157	186	144	188	146	238	184	243	189	286	222
70	239	186	246	192	227	176	229	178	296	230	303	236	356	278
95	285	221	293	229	271	210	274	213	361	280	369	287	434	338
120	323	252	332	260	308	240	311	242	417	324	426	332	500	391
150	361	281	366	288	343	267	347	271	473	368	481	376	559	440
185	406	317	410	324	387	303	391	307	543	424	550	432	637	504
240	469	367	470	373	447	351	453	356	641	502	647	511	745	593
300	526	414	524	419	504	397	510	402	735	577	739	586	846	677
400	590	470	572	466	564	451	571	457	845	673	837	676	938	769
500	650	530	672	546	604	504	661	537	935	773	938	776	1118	919
630	700	600	882	646	654	554	771	617	1045	883	1048	886	1318	1089
800	750	660	1002	756	694	594	871	717	1145	983	1148	986	1528	1279
1000	800	720	1112	856	724	644	971	807	1235	1083	1238	1086	1738	1469

Nom. Cross - Section Area	Buried direct in Ground				Laid in Single Way Duct				Laid in Air
	Trefoil		Flat spaced		Trefoil		Flat Touching		Trefoil		Flat Touching		Flat spaced
	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL	CU	AL
mm²	A		A		A		A		A		A		A
10	81	57	83	58	74	52	94	53	94	68	97	70	110	79
16	106	82	109	84	99	77	100	78	116	90	119	92	138	107
25	136	105	140	109	128	99	129	100	153	119	156	121	181	141
35	162	126	167	130	153	118	154	120	186	144	190	147	221	171
50	192	149	198	153	181	140	183	142	224	174	229	178	266	207
70	234	182	242	188	222	172	224	174	280	218	287	223	334	259
95	280	217	289	224	266	206	269	208	343	266	352	273	409	317
120	319	247	329	256	303	235	306	238	398	309	407	317	474	368
150	357	277	369	287	341	264	344	267	454	352	465	361	540	419
185	403	314	417	325	386	300	390	303	522	406	534	417	621	484
240	467	364	484	377	449	350	454	354	619	483	634	495	736	575
300	526	411	545	426	509	397	515	401	712	556	728	570	843	659
400	597	471	618	487	580	456	588	462	825	651	843	667	977	770
500	657	531	718	567	620	509	678	542	915	751	849	767	1157	920
630	707	601	928	667	670	559	788	622	1025	862	1054	876	1357	1090
800	757	661	1048	777	710	599	888	722	1125	961	1154	977	1567	1280
1000	807	721	1158	877	740	649	988	812	1215	1061	1244	1077	1777	1470

Quality Control

Single Core Medium Voltage Power Cable to IEC 60502

Raw Material Test

NPC has always chosen raw material suppliers who have a good reputation, possess stable supply capabilities and have passed international quality system certifications (such as ISO 9001). And establish a long-term cooperative relationship with it, forming a stable and reliable raw material supply chain.
We will ensure that all raw materials are subject to strict inspection procedures upon entry to the factory, and can only be stored in the warehouse after they have been confirmed to meet the standards.

Process inspection

NPC has strict quality control procedures for each process in the cable production process.
Process documents: Develop detailed process flow and operation instructions to clarify the operating specifications and quality standards of each process.
Equipment calibration: Regularly calibrate key equipment such as wire drawing machines, stranding machines, extruders, and diameter gauges to ensure that the accuracy meets the requirements.
First piece confirmation: Before each batch of production, the first piece is trial-produced to confirm that the process parameters, product dimensions, electrical performance, etc. meet the standards before mass production can be carried out.

Finished Product

Inspectors conduct ex-factory inspections on cables according to relevant standards and corresponding product inspection specifications to ensure that each ex-factory product complies with the process regulations.

Application

Renewable Energy

Power & Energy Industry

Transport Sector

Real Estate & Construction

Infrastructure & Municipal Industry

Data Centers

Mining and Oil & Gas Industry

Industrial Manufacturer

Technical Advantages

● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions

Conductor Stranded Work Shop

CCV Production Line

CCV production 01

Partical Voltage Test Labtoary

Auto-Winding Machine

Oil Chromatography Test Machine

Auto-core cutting machine

Basic Insulation Level Test Labtoary

Auto Laser Cutting Machine

Automatic Desanding Machine

Automatic Dryer Machine

Product Packaging

Wires and Cables packaging (1)

Wires and Cables packaging (2)

Wires and Cables packaging (3)

Wires and Cables packaging (4)

Wires and Cables packaging (5)

Wires and Cables packaging (6)

Wires and Cables packaging (7)

Wires and Cables packaging (8)

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FAQ From Customers

What are the advantages of power cables and overhead lines?

(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people;
(2) The maintenance workload is small and frequent inspections are not required;
(3) No need to erect towers;
(4) Help improve power factor.

Which aspects should be considered when choosing the cross section of a power cable?

(1) The long-term allowable working current of the cable;
(2) Thermal stability once short circuited;
(3) The voltage drop on the line cannot exceed the allowable working range.

What are the measures for cable fire prevention?

(1) Use flame-retardant cables;
(2) Use fireproof cable tray;
(3) Use fireproof paint;
(4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.;
(5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.

What should be paid attention to during the transportation and handling of cables?

(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat.
(2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.

What inspections should be carried out for the acceptance of cable lines?

(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear;
(2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements;
(3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements;
(4) Good grounding;
(5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted;
(6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.

How many projects can cable engineering be divided into?

(1) Construction site transportation: including the loading and unloading, transportation and empty vehicle return journey of engineering materials from the warehouse to the construction site.
(2) Local engineering: including road excavation, tunnel, trench construction, etc.
(3) Laying engineering: including laying, intermediate head production, lift cover plate, buried pipe, school tide, tractor head production, etc.
(4) Two-end engineering: including the production and installation of support, suspension bridge and its foundation, the production of terminal heads, the installation of oil pressure and signal devices, and the electrical performance testing of various types.
(5) Stopping works: including the production of oil-filled cable stop heads, the installation of fuel supply tanks, automatic drainage and signal devices, etc.
(6) Grounding engineering: including installation of insulation joints, transposition boxes, protectors, and grounding boxes.

What tests and inspections should be carried out on power cables before laying?

Before laying, check whether the type, specification and length of the cable meet the requirements and whether there is external force damage. Low-voltage cables use a 1000V megohmmeter to remotely measure the insulation resistance, and the resistance is generally not less than 10MΩ. High-voltage cables use a 2500V megger to measure the resistance. Generally not less than 400MΩ.

What are the factors that determine the long-term allowable current carrying capacity of the cable?

(1) The long-term allowable working temperature of the cable;
(2) The heat dissipation performance of the cable itself;
(3) The condition of the cable installation and the heat dissipation conditions of the surrounding environment.

According to the difference of insulation and protective layer, what are the main types of commonly used low-voltage power cables?

(1) Oil-impregnated paper insulated lead-clad (or aluminum-clad) power cable;
(2) Non-drip oil-impregnated paper insulated power cable;
(3) PVC insulated and sheathed power cable;
(4) Cross-linked PVC insulated and PE sheathed power cable;
(5) Cross-linked PVC insulated and sheathed power cable;
(6) Rubber insulated power cables.

What are the requirements for the fire blocking of cable holes?

For larger cable penetration holes, such as the cable penetration floor, etc., when using fireproof blocking materials to block, according to the actual situation, first coat four to six layers of fireproof paint on the cable surface, the length is about 1.5m below the hole, and then use fire-resistant The material is processed into a board-supporting fire-proof blocking material with a certain strength to ensure that it is firm after being blocked and is easy to disassemble and assemble when the cable is replaced. The plugging is dense and non-porous to effectively block smoke and fire.

What are the main properties of the insulation material of the power cable?

(1) High breakdown strength;
(2) Low dielectric loss;
(3) Very high insulation resistance;
(4) Excellent discharge resistance;
(5) It has certain flexibility and mechanical strength;
(6) Long-term insulation performance is stable.

What are the regulations for cable protection tubes?

(1) When the cable needs to be laid through a protective pipe, the inner diameter of the pipe should not be less than 1.5 times the outer diameter of the cable, and the inner diameter of the concrete pipe, clay pipe, asbestos, and cement pipe should not be less than 100mm;
(2) The bending radius of the cable tube should meet the requirements of the bending radius of the cable inserted;
(3) Each pipe should not exceed three elbows at most, and there should be no more than two right-angle bends.

How to measure the outer diameter of the cable sheath?

At five evenly distributed points on the circumference of the sheath, measure the outer diameter of the sheath and its average value. The average outer diameter is the outer diameter of the sheath.

How to connect copper core cables with different cross-sections?

Copper core cables with different cross-sections can be connected by open-back weak copper pipes and connected by soldering, or pure copper rods can be connected into copper pipes according to different cross-sectional requirements and connected by crimping.

What are the insulating materials used to make cable terminal heads or intermediate joints?

There are insulating glue, insulating tape, insulating tube, insulating gloves, insulating resin, etc.

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Welcome your inquiry

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Single Core Medium Voltage Power Cable to IEC 60502

Construction

Conductor

Insulation

Conductor Screen

Armour (for armored cable)

Metallic Layer

Separation Sheath (for armored cable)

Lapped Bedding (for armored lead sheathed cable)

Insulation Screen

Over Sheath

Physical Proerties

Technical Specifications

Quality Control

Raw Material Test

Process inspection

Finished Product

Application

Technical Advantages

Conductor Stranded Work Shop

CCV Production Line

CCV production 01

Partical Voltage Test Labtoary

Auto-Winding Machine

Oil Chromatography Test Machine

Auto-core cutting machine

Basic Insulation Level Test Labtoary

Auto Laser Cutting Machine

Automatic Desanding Machine

Automatic Dryer Machine

Product Packaging

Related Products

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Instrumentation Cables—PVC Insulated, Overall Screened, Wire Armoured PVC Sheathed Cables(CU/PVC/OSCR/SWA/PVC)

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ALL ALUMINUM CONDUCTORS（AAC）

Instrumentation Cables—PVC Insulated,Individual &Overall Screened, Wire Armoured PVC Sheathed Cables(CU/PVC/IOSCR/SWA/PVC)

FAQ From Customers

Welcome your inquiry