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Neovar F 502 F class Air Drying Varnish

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Strong bonding hence firmly holds the wires

Stony Hardness

Resists hot transformer oil /mild acids & alkalis

Dries fast ensuring rapid service to customers

Durable Insulation

Excellent Heat & Moisture Resistance

Exhibits good flexibility

Excellent electrical & Anti tracking properties

Product Description

NeoVar F 502 is an isophthalic alkyd resin based Class F (Temp. index 1550C) air drying type impregnating varnish. It exhibits excellent dielectric properties under humid condition, good bond and adhesive strength. Its stony hardness & good flexibility protects the wire winding from external shocks.

Application Areas

NeoVar F 502 is suitable for insulating all kinds of electrical windings where additional protection is desired. Finds use as a air drying varnish for coil winding & for insulation board mould making

 

Properties

Method

Standard Values

Colour

----

Reddish Colour Liquid

Viscosity

F/C B-4/ at 30ºC

60 70 secs

Sp. Gravity

at 30ºC

0.93 ± 0.02

Non Volatile matter

2gms/120ºC/1hr

52 ± 2%

Flash Point

Open Cup

Minimum 28ºC

Effect on enameled wire

----

No reaction

Reaction of Varnish with Copper

----

No reaction

Compatibility with Thinner

Varnish:Thinner

1:infinite

Drying Properties

Drying in Thin layer

Surface Dry Tack free

10-15 mins

60-90 mins

Re softening

1650C

No change

Recommended drying schedule

4 – 6 hrs at Room Temperature or 3 –4 hrs at 70 0C

Electrical properties

 

Dielectric strength

@ RT @ 155ºC

After 24hrs immersion in water

90 KV/mm

65 KV/mm

60 KV/mm

Volume Resistivity

500 VDC in air

2.2 x 1012 ohm-c m

Temperature Index

By TGA in air

1560C

Properties of cured film

Effect of Transformer oil

 

No effect

Flexibility

Mandrel apparatus

No crack observed

All the testing have done as per IS : 10026 (Part III) – 1983

Surface Preparation & Application Method

Ensure before application, wire windings are free from moisture and other impurities. NeoVar F 502 can be applied by any suitable method like brushing / pouring / dipping /impregnation.

Packing, Storage & Shelf life

Available in 900 gm, 21 kg, 180 kg pack sizes. Store in a cool & dry place

Shelf life 1 year from date of manufacture in original sealed container at Room Temperature











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