120°C Polyvinylformal (PVF) Single strand Enamel continuously transposed conductor is one of CTC used for transmission transformer or substation transformer, which is made of single Polyvinylformal (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

Detail requirements
Short circuit of elementary conductors is not allowed
Enamel: 120°C Polyvinylformal (PVF) Epoxy coated elementary conductors must be bonded together when subjected to a temperature of 120°C
The enamel coating of the main layer should not have cracks and breaks up to the core
The breakdown voltage of an elementary conductor in the initial state must be at least 2000V.
Epoxy: 19227MC70
Single strand surface roughness: Rz10
Paper: thermally upgraded with density >0.95 g/cm3
Conductivity: 58.0 mS/m
Radius: 0.65mm±25%
Drum dimensions 1400/900-530 hole diameter 82

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