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Features of Bare Litz Wires

Single wire of the bare litz wires are not enameled.

The Bare litz wires can be provided with the insulations, in the form of yarns or tapes, which increases the electrical and mechanical values.

Bare litz wire can be round or profiled (rectangular or square).

Round litz wires are very flexible whereas profiled litz wires have better fill factor.

About Bare Litz Wires

Product Range

Cross-sectional Area 0.5 sq. mm – 400 sq. mm
Diameter of single strand 0.032mm – 2.52mm
Type of Lay CONCENTRIC / NON-CONCENTRIC
Direction of lay S/Z
Width of Pressed litz UPTO 30 MM
Thickness of Pressed litz UPTO 20 MM

Product Range

TAPES YARNS
POLYESTER FILM POLYESTER
MICA NYLON
COTTON SILK
FIBER GLASS FIBER GLASS
NOMEX ARAMID
SEMI-CONDUCTIVE COTTON

Types Bare Litz Wires

Features of HF Litz Wires

Single wire of HF Litz Wire is coated with enamel.
HF Litz wires avoids losses due to skin effect and proximity effect.
HF litz wires consists of bunched enameled wires.
The enamel insulations can be of temperature class 155, 180 , 200 , 220 or 240°C.
The enamel insulation on wires can be of Grade 1, Grade 2 or Grade 3 according to the customer requirement.
The HF litz wires can be provided with the additional insulations, in the form of yarns or tapes, which increases the electrical and mechanical values.
HF litz wires can be round or profiled (rectangular).

Skin Effect is the tendency of an electric current to distribute itself within a conductor such that the current density near the surface of the conductor is greater thatn at its core. The higher the frequency, the larger the impact of skin effect. HF Litz wire counteract this effect by increasing the surface area without significant increase in the size of conductor. Eddy currents which are generated through the fields of adjacent conductors also effect the performance of the single conductor. This is called proximity effect.

Frequency Individual Strand Diameter
1.5 MHz – 2.8 MHz 0.032 mm
850 kHz – 1.5 MHz 0.040 mm
500 kHz – 850 kHz 0.050 mm
250 kHz – 500 kHz 0.063 mm
100 kHz – 250 kHz 0.071 mm
100 kHz – 250 kHz 0.071 mm
50 kHz – 100 kHz 0.100 mm
20 kHz – 50 kHz 0.125 mm
10 kHz – 20 kHz 0.200 mm
1 kHz – 10 kHz 0.250 mm
50 Hz – 1 kHz 0.400 mm

About High Frequency Litz Wires

Product Range

Cross-sectional Area 0.5 sq. mm – 400 sq. mm
Diameter of single strand 0.032 MM – 1.00 MM
Type of Lay CONCENTRIC / NON-CONCENTRIC
Direction of lay S/Z
Width of Pressed litz UPTO 30 MM
Thickness of Pressed litz UPTO 20 MM

Product Range

TAPES YARNS
POLYESTER FILM POLYESTER
MICA NYLON
COTTON SILK
FIBER GLASS FIBER GLASS
NOMEX ARAMID
SEMI-CONDUCTIVE COTTON

Types of HF Litz Wires

Types of Insulations

Type of Enamel
Temperature IndexFeatures
Polyvinyl formal modified
120High mechanical,
Hydrolysis resistance
Polyurethane modified
155 to 180
Solderable,
Good flexibility,
Better moisture resistance
Polyester-imide modified
180
Good electrical properties
Polyester-imide modified + Polyamide-imide
200
High temperature,
Better dielectric values,
Better moisture resistance
Polyamide-imide
220
Better thermal properties
Polyimide
240Better flexibility,
Better chemical compatibility
High dielectric values
Type of Tape
Maximum Temperature
Features
Cotton
105oC
Low cost,
Good abrasion resistance
Cellulosic Papers
( Kraft paper / Crepe Paper)
120oC
Better electrical values,
Better bending values for crepe paper
Polyester (PET)
135oC
High dielectric strength,
Good abrasion resistance
Nomex ( Aromatic Polyamide)
220oC
Excellent thermal properties,
Excellent electrical properties,
Good abrasion resistance,
Polyimide
Kapton
220oC(upto 400oC under certain conditions)Very high dielectric strength,
Very good chemical resistance,
Excellent mechanical properties
Fiber Glass
Ultimate operating temperature determined by application and glass typeExcellent electrical properties at high temperature,
Excellent solvent resistance
Mica
Ultimate operating temperature determined by application and glass type
Excellent electrical properties at high temperature,
Flame resistant,
Retains electrical properties during and after exposure to fire
Type of Yarn
Maximum Temperature
Features
Cotton
105oC
Low cost,
Good abrasion resistance
Polyamide (Nylon) / Polyester
130oC
Excellent abrasion resistance,
Solderable
Glass / Polyester
155oC
Good abrasion resistance,
Solderable
Glass
>180oC
Better Electrical properties at high temperatures

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