Formvar
Proven performance in oil-filled applications. Excellent hydrolytic stability.
MARKETS
Transformers:
General
Utility Distribution Transformers
TYPICAL APPLICATIONS
Oil-filled transformers, superconducting coils for cryogenic applications, and motors
FEATURES AND BENEFITS
- Resistant to mechanical and winding abuse due to superior flexibiity and abrasion resistance
- Performs well in in-line flattening processes.
- Compatible with most varnishes and impregnation compounds.
- Retains insulating properties when exposed to cryogenic temperatures.
- Compatible with transformer oils.
AVAILABILITY
Single
8-28 AWG
Heavy
1-28 AWG
TYPICAL PROPERTIES
This data is typical of 18 AWG copper, heavy build insulation only. It is not intended to be used to create specification limits.
THERMAL
Thermal Endurance
>110°C
Thermoplastic Flow
minimum
typical
180°C
230°C
Heat Shock (20% 3X)
20% 3x 175°C
Stress Relief Temperature
150°C
MECHANICAL
Mandrel Flexibility
minimum
typical
After Elongation
20% 3x OK
30% 1x OK
After Snap
3x OK
1x OK
Elongation
32%
40%
Unilateral Scrape
minimum
typical
Avg. of 3 sides
1150 gms
1600 gms
ELECTRICAL
Dielectric Breakdown
@RT
10 kV
@ 105° C
7 kV
High Voltage Continuity
NEMA @ 1500 V DC
5 faults/100 ft max
Typical @ 2000 DC
0-1 faults/100 ft
CHEMICAL
Completeness of Cure
5 min boil 70/30
Transfer Oil System
Retained Flexibility- 1x OK
Retained Flexibility-90% of original breakdown voltage
Resistance to Solvents
After 24 hrs @ RT
Xylene
50/50 Cellosolve/Xylene
Perchloroethylene
1% NaOH
28% Sulfuric Acid
Gasohol
50/50 Cellosolve/Xylene
Perchloroethylene
1% NaOH
28% Sulfuric Acid
Gasohol