Productos

EPGF51/EPGF52/EPGF53 winding pipe

Product features: The winding tube made of alkali-free glass fiber yarn impregnated with epoxy resin, wound, baked and cured, has high mechanical and dielectric properties. Application areas: It is suitable for insulation structure parts in motors and electrical equipment, and can be used in humid environment and transformer oil, as well as insulation parts with flame retardant requirements.

Classificationn:

Laminated sheet

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Physical, mechanical and electrical properties

Serial Number	Indicator Name		Unit	Test Method	EPGF51 Ordinary type	EPGF52 high temperature type	EPGF53 flame retardant type
1	Density		g/cm3	GB/T 5132.2-2009 IEC 61212.2:2006	≥ 1.70	≥ 1.70	≥ 1.70
2	interlayer bonding strength		MPa		≥100	≥100	≥100
3	axial compression strength		MPa		≥150	≥150	≥150
4	Vertical layer bending strength	under normal	MPa		≥400	≥400	≥400
4	Vertical layer bending strength	After 155 ℃	MPa		-	≥ 200	-
5	Insulation resistance after water immersion Insulation resistance after water immersion		Ω		≥ 1.0 × 109	≥ 1.0 × 109	≥ 1.0 × 109
6	The vertical layer to the electric field intensity. (90 2)℃ in transformer oil		Kv/mm		See Table "Vertical Layer to Electrical Strength"
7	Parallel layer to breakdown voltage (90 2)℃ in transformer oil		kV		≥40	≥40	≥40
8	Withstand voltage along the surface after damp (5min)		kV	GB/T 23100-2008	≥12	≥12	≥12
9	Dielectric loss factor at power frequency		-	IEC 61212.2:2006 GB/T5132.2-2009	≤ 5.0 × 10-2	≤ 5.0 × 10-2	≤ 5.0 × 10-2
10	Dielectric relative permittivity at power frequency		-		5.2±0.2	5.2±0.2	5.2±0.2
11	Temperature Index (T. I)		-		≥ 130	≥ 155	≥ 130
12	water absorption		%		0.2	0.2	0.2
13	Combustibility		Level		--	--	V0
14	Partial discharge		PC	GB/T 7354-2003	≤ 5	≤ 5	≤ 5
Note 1: For interlayer bonding strength, it is only applicable to tubes with inner diameter not more than 100mm. Note 2: The height of the sample for partial discharge test is 25.0mm ± 0.2mm, and the recommended applied electric field strength is 200 V/mm ~ 300 V/mm.

Vertical layer direction electrical strength

Nominal wall thickness/mm	Electrical strength KV/mm,1min withstand voltage or 20s step-by-step boost test
	EPGF51	EEPGF52	PGF53
1.0	≥ 11.6
1.2	≥ 11.0
1.4	≥ 10.4
1.6	≥ 9.8
1.8	≥ 9.4
2.0	≥ 9.0
2.2	≥ 8.7
2.4	≥ 8.4
2.6	≥ 8.1
2.8	≥ 7.9
≥3.0	≥ 7.7