PRODUCT

GTACSR, GZTACSR-Gap type conductor

GTACSR, GZTACSR used for overhead power transmission line.

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Gap type conductor

GTACSR, GZTACSR

APPLICATION:

GTACSR, GZTACSR used for overhead power transmission line.

Standard: IEC 62420, IEC 62219, IEC 60888, IEC 62004

Construction:

- The center is extra high strength galvanized steel, the outer layer is thermal-resistant (or super thermal-resistant) aluminum alloy.
- To create a gap between the core and the inner aluminum layer , the inner aluminum layer has a trapezoid shape.
- A gap between layers of aluminum alloy and steel core is filled with heat-resistant grease to prevent friction between the steel core and aluminum parts.
- The layers of aluminum alloy and steel core can move independently.

Characteristics:

Max. conductor temperature in normal operation:

GTACSR: 150℃

GZTACSR: 210℃

Advantages:

- GAP type conductors can carry up to 1.6 times (GTACSR) or 2 times (GZTACSR) the current of conventional overhead conductors due to their high temperature capability.
- Gap conductors are an excellent solution for uprating overhead lines. Existing ACSR conductors can easily be replaced by Gap conductors offering up to double the capacity.
- No or limited modifications to towers or structures are required.

Design

GTACSR/GZTACSR can be designed to have the same mechanical characteristics as existing ACSR. Design examples are shown below.

Size		mm2	185	240	265	310	370
Equivalent conductor			Lynx	Hawk	Hen	Goose	Redwing
Stranding	(Z)TAI	No/mm	14/ TZ*1(3.23) 10/TZ(2.98)	15/ TZ(3.46) 10/TZ(3.69)	19/3.1 10/TZ(3.94)	16/3.9 10/TZ(3.94)	17/4.15 12/TZ(3.83)
Stranding	Est	No/mm	7/2.0	7/2.4	7/2.8	7/2.8	7/3.8
Rated tensile strength		kN	62.4	86.8	107.5	113.8	179.5
Diameter	GTACSR/GZTACSR	mm	17.8	20.6	22.6	24.4	27.3
Diameter	Steel core	mm	6.0	7.2	8.4	8.4	11.4
Cross sectional area	Aluminum	mm2	184.5	247.9	265.3	313.1	368.2
	Steel core		21.99	31.67	43.11	43.11	79.38
	Total		206.5	279.6	308.4	356.2	447.6
Weight	Aluminum	kg/km	700.3	955.9	1098	1227	1666
D.C.Resistance at 20˚	C	Ω/km	0.160	0.119	0.111	0.0941	0.0798
Current carrying capacity*2	GTACSR(150˚C)	A	713	863	919	1021	1147
Current carrying capacity*2	GZTACSR(210˚C)	A	871	1058	1128	1255	1414
Modulus of elasticity	GTACSR/GZTACSR	GPa	77.1	78.1	81.9	79.2	87.4
Modulus of elasticity	Steel core	GPa	205.9	205.9	205.9	205.9	205.9
Coefﬁcient of linear expansion	GTACSR	10-6/˚C	19.7	19.6	19.0	19.4	18.2
Coefﬁcient of linear expansion	Steel core	10-6/˚C	11.5	11.5	11.5	11.5	11.5

Size		mm2	410	413	520	620
Equivalent conductor			Condor	Drake	-	-
Stranding	(Z)TAI	No/mm	15/4.6 10/TZ(4.55)	16/4.4 10/TZ(4.65)	18/TZ(4.01) 14/TZ(3.96) 10/TZ(3.88)	16/TZ(4.80) 12/TZ(4.75) 12/TZ(3.47)
Stranding	Est	No/mm	7/3.0	7/3.2	7/3.0	7/3.2
Rated Tensile Strengt	h	kN	138.1	149.2	152.9	178.3
Diameter	GTACSR/GZTACSR	mm	27.6	27.8	29.0	31.5
Diameter	Steel core	mm	9.0	9.6	9.0	9.6
Cross sectional area	Aluminum	mm2	411.9	413.2	518.0	615.7
	Steel core		49.48	56.29	49.48	56.29
	Total		461.4	469.5	567.5	672.0
Weight	Aluminum	kg/km	1557	1616	1856	2179
D.C.Resistance at 20˚	C	Ω/km	0.0714	0.0714	0.0570	0.0478
Current carrying capacity*2	GTACSR(150˚C)	A	1257	1219	1356	1516
Current carrying capacity*2	GZTACSR(210˚C)	A	1500	1503	1667	1866
Modulus of elasticity	GTACSR/GZTACSR	GPa	77.3	79.1	74.4	73.5
Modulus of elasticity	Steel core	GPa	205.9	205.9	205.9	205.9
Coefﬁcient of linear expansion	GTACSR	10-6/˚C	19.7	19.4	20.2	20.3
Coefﬁcient of linear expansion	Steel core	10-6/˚C	11.5	11.5	11.5	11.5

*1: TZ: Trapezoid wire

*2: Ambient temp.: 40 degree C, Wind 0.5m/sec, Wind direction: 45degree,

Solar radiation: 0.1W/cm2, Absorptivity & Emmisivity of conductor surface: 0.5

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