120 °C polyvinyl aldehyde filament (PVF) continuous enameled change-over conductor

2024-02-22 11:05:14

120 °C polyvinyl aldehyde filament (PVF) continuous enameled change-over conductor

The 120 °C Polyvinylal (PVF) single wire enameled continuous transposition conductor is one of the CTCs used in transmission transformers or substation transformers and is made of a single polyvinylal (PVF) enameled wire.

Conductor data	Conductor designation	picture
	Type of wire	CTC
Single strand dimension without insulation	Number of single strands	21
	Radial direction b1	1,4±0,05mm
	Axial direction h1	6,7±0,05mm
Insulation	Enamel thickness ten	0,10±0,02mm
	Epoxy thickness of broadsided epoxy tepb	0,04±0,01mm
	Epoxy thickness of surrounding epoxy teps	-
	Outer conductor insulation Tpo	0,7±5%mm
	Interleaving paper thickness inside CTC between the axial strands	0,2mm
	Type of outer insulation	Inner most	MunksjoThermo trans HD, green, TU Kraft-paper (5A4-1М1)
		Outer most	Cindus 42HCF
Conductor (bundle)	Radial direction Bmax Bnom Bmin	14,5 14,6 14,65
	Axial direction Hmax Hnom Hmin	17,65 17,75 17,95
Material	Type	CU_ETP
	Yield strength Rp0.2	≥160N/mm2
Winding total (3phase)	Length per drum	681m
	№ of drums	3
	Conductor length Lwt	2043m
	Conductor mass (insulated)	3590kg
Winding	inner diameter	757mm

Detailed requirements
Shorting of the basic conductor is not permitted.
Enameled wire: 120 °C The epoxy resin polyvinyl aldehyde (PVF) coated main conductor must be bonded at a temperature of 120 °C. The enamel coating of the core layer must be bonded to the main conductor.
The enamel coating of the core layer must be free of cracks and tightly bonded to the core.
The breakdown voltage of the basic conductor must be at least 2000 V in the initial state.
Epoxy resin: 19227MC70
Surface roughness of single wire: Rz10
Paper: thermally reinforced, density > 0.95 g/cm3
Conductivity: 58.0 mS/m
Radius: 0.65 mm ± 25
Roll size 1400/900-530 Inner diameter 82