ACSS/TW-Aluminum Conductor Steel Supported Trapezoidal Wire

Introduction

Application
ACSS/TW is used for overhead distribution and transmission lines. It is designed to operate continuously at elevated temperatures up to 250°C without loss of strength, it sags less under emergency electrical loadings than ACSR/TW, excellent self-damping properties, and its final sags are not affected by long-term creep of aluminum. ACSS/TW is available in equal area and equal diameter design. The equal area design allows equal ampacity in a smaller diameter conductor when compared with a standard ACSS conductor. The equal diameter design allows more ampacity in an equal diameter conductor when compared with a standard ACSS conductor. ACSS/TW also provides many design opportunities for new line construction: i.e., reduced tower cost, decreased sag, increased selfdamping properties, increased operating temperature and improved corrosion resistance.
Description
ACSS/TW is a composite concentric-lay-stranded conductor. Steel strands form the central core of the conductor with two or more layers of trapezoidal aluminum 1350-0 wires stranded around it. The steel core carries most or all of the mechanical load of the conductor due to the "0" (fully annealed or soft) temper aluminum. Steel core wires are protected from corrosion by high strength steel core, aluminum clad steel core is also available.
Specification
● ASTM B 857 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW).

Technical parameter

ASTM B 857

Code Word	Conductor Size	Aluminum Stranding		Steel Core Stranding		Nominal Mass	Rated Strength			Nominal Outside Diameter	Nominal DC Resistance at 20℃
Code Word	Conductor Size	No. of Aluminum Wires	No. of Layers	No. of Wires	Individual Strand Wire Diameter	Nominal Mass	GA2/ MA2	GA3/ MA3	AW2	Nominal Outside Diameter	Nominal DC Resistance at 20℃
	MCM				mm	kg/km	kN	kN	kN	mm	Ω/km
Partridge	266.8	18	2	7	2.002	519	39.59	43.15	37.36	14.73	0.206
Oriole	336.4	17	2	7	2.69	783	65.83	72.5	63.16	17.53	0.1625
Flicker	477.0	18	2	7	2.388	911	57.82	63.16	55.6	19.81	0.116
Hawk	477.0	18	2	7	2.675	975	69.39	76.06	66.28	20.07	0.1153
Hen	477.0	17	2	7	3.203	1110	93.41	100.97	89.4	21.08	0.1146
Parakeet	556.5	18	2	7	2.578	1062	67.61	73.84	64.94	21.34	0.099
Dove	556.5	20	2	7	2.891	1137	80.95	88.52	77.84	21.59	0.0987
Rook	636.0	18	2	7	2.756	1217	76.95	84.51	74.28	22.61	0.0867
Grosbeak	636.0	20	2	7	3.089	1299	92.07	99.64	88.52	23.11	0.0863
Tern	795.0	17	2	7	2.25	1326	63.16	67.61	60.05	24.38	0.0697
Puffin	795.0	18	2	7	2.814	1449	84.07	91.63	81.4	24.89	0.0697
Condor	795.0	20	2	7	3.081	1518	96.52	103.64	92.96	25.15	0.0693
Drake	795.0	20	2	7	3.454	1623	115.2	124.54	108.53	25.65	0.069
Mallard	795.0	22	2	19	2.482	1836	152.57	168.58	146.34	26.67	0.0688
Phoenix	954.0	30	3	7	2.126	1530	63.16	67.61	60.49	26.67	0.0587
Rail	954.0	32	3	7	2.466	1598	74.28	80.06	72.06	26.92	0.0583
Cardinal	954.0	20	2	7	3.376	1826	115.65	124.54	109.42	27.43	0.0577
Snowbird	1033.5	30	3	7	2.212	1658	68.5	72.95	65.83	27.69	0.054
Ortolan	1033.5	32	3	7	2.565	1731	80.51	86.74	78.28	27.94	0.054
Curlew	1033.5	21	2	7	3.513	1973	125.43	134.77	116.09	28.70	0.0533
Avocet	1113.0	30	3	7	2.296	1784	72.5	77.84	70.72	28.70	0.05
Bluejay	1113.0	33	3	7	2.664	1864	86.74	93.41	84.07	28.96	0.05
Finch	1113.0	38	3	19	2.189	2123	135.22	147.67	128.1	30.23	0.0497
Oxbird	1192.5	30	3	7	2.377	1912	77.84	83.18	75.62	29.72	0.0467
Bunting	1192.5	33	3	7	2.756	1997	92.96	100.08	90.29	29.97	0.0467
Grackle	1192.5	38	3	19	2.266	2275	145	157.9	137	30.99	0.0467
Scissortail	1272.0	30	3	7	2.456	2040	83.18	88.96	80.95	30.48	0.044
Bittern	1272.0	35	3	7	2.847	2131	99.19	106.75	96.08	30.99	0.0437
Pheasant	1272.0	39	3	19	2.339	2425	151.68	165.91	145.89	32.00	0.0437
Dipper	1351.5	35	3	7	2.934	2263	105.42	113.42	102.3	32.00	0.0413
Martin	1351.5	39	3	19	2.41	2577	161.02	176.14	155.24	33.02	0.041
Bobolink	1431.0	36	3	7	3.02	2397	111.64	120.1	108.09	32.77	0.039
Plover	1431.0	39	3	19	2.482	2729	170.8	186.37	164.13	34.04	0.0387
Lapwing	1590.0	36	3	7	3.183	2664	124.1	131.66	120.1	34.54	0.035
Falcon	1590.0	42	3	19	2.616	3033	189.48	207.28	182.81	35.81	0.035
Chukar	1780.0	37	3	19	2.22	3067	157.01	169.91	149.45	36.83	0.0313
Bluebird	2156.0	64	4	19	2.441	3738	187.26	202.38	181.03	40.89	0.026
Mohawk	571.7	18	2	7	2.616	1092	69.39	76.06	66.72	21.59	0.0963
Calumet	565.3	20	2	7	2.911	1155	81.84	89.85	78.73	21.84	0.0973
Mystic	666.6	20	2	7	2.822	1274	80.95	88.52	77.84	23.11	0.0827
Oswego	664.8	20	2	7	3.16	1359	96.52	104.08	92.96	23.62	0.0827
Maumee	768.2	20	2	7	3.035	1469	93.41	102.3	89.85	24.89	0.0717
Wabash	762.8	20	2	7	3.381	1558	110.76	119.21	104.08	25.15	0.072
Kettle	957.2	32	3	7	2.471	1604	74.73	80.51	72.5	26.92	0.0583
Fraser	946.7	35	3	7	2.931	1696	93.85	101.86	90.29	27.43	0.0587
Columbia	966.2	21	2	7	3.399	1845	117.43	125.88	110.76	27.69	0.0573
Suwannee	959.6	22	2	7	3.792	1960	136.55	147.23	125.43	28.19	0.0573
—	1080.0	20	2	7	2.624	1802	84.07	90.74	81.84	28.70	0.0517
Cheyenne	1168.1	30	3	7	2.352	1873	76.51	81.4	74.28	29.46	0.0477
Genesee	1158.0	33	3	7	2.738	1945	91.18	98.3	88.52	29.72	0.048
Hudson	1158.4	25	2	7	3.726	2214	138.33	149.01	127.66	30.48	0.0477
Catawba	1272.0	30	3	7	2.456	2040	83.18	88.96	80.95	30.48	0.044
Nelson	1257.1	35	3	7	2.832	2107	98.3	105.86	95.19	30.73	0.0443
Yukon	1233.6	38	3	19	2.311	2357	147.67	161.46	142.34	31.75	0.045
Truckee	1372.5	30	3	7	2.55	2201	89.85	95.63	87.18	31.75	0.0407
Mackenzie	1359.7	36	3	7	2.944	2278	106.31	114.31	102.75	32.00	0.041
Thames	1334.6	39	3	19	2.398	2546	159.24	173.92	153.46	32.77	0.0417
St.Croix	1467.8	33	3	7	2.644	2356	96.08	102.75	93.41	32.77	0.038
Miramichi	1455.3	36	3	7	3.048	2439	113.87	120.54	110.31	33.02	0.0383
Merrimack	1433.6	39	3	19	2.484	2735	170.8	186.82	164.58	34.04	0.0387
Platte	1569.0	33	3	7	2.728	2516	102.75	109.42	99.64	33.78	0.0357
Potomac	1557.4	36	3	7	3.152	2610	121.43	128.99	117.87	34.29	0.0357
Rio Grande	1533.3	39	3	19	2.57	2925	183.26	200.16	176.14	35.05	0.0363
Schuylkil	1657.4	36	3	7	3.251	2777	129.44	137.44	125.43	35.31	0.0337
Pecos	1622.0	39	3	19	2.703	3132	200.16	219.29	192.6	36.07	0.034
Pee Dee	1758.6	37	3	7	3.35	2946	137.44	145.89	130.77	36.32	0.0317
James	1730.6	39	3	19	2.731	3302	206.39	225.96	198.83	37.34	0.032
Athabaska	1949.6	42	3	7	3.536	3269	152.57	162.35	141	38.10	0.0287
Cumberland	1926.9	42	3	19	2.878	3674	229.52	250.87	221.07	39.37	0.0287
Powder	2153.8	64	4	19	2.441	3735	187.26	202.38	181.03	40.64	0.026
Santee	2627.3	64	4	19	2.697	4558	228.18	247.31	221.07	44.70	0.0213