Glass Fibre Polyester Wound Varnish Enamelled Rectangular Copper Wire

Dimension: Thickness(a) 0.3-10 mm; Width(b) 1-22 mm
Thermal Class (℃): 120; 180; 200; 220; 240
Feature: Solderable and Self-bonding
Standard: IEC, NEMA, GB, JIS, UL

Introduction

Glass-fiber wrapped enameled flat copper wire is manufactured by first applying an enamel coating to a high-quality rectangular copper conductor and then wrapping it with glass fiber. According to customer requirements, the appropriate thermal class of insulating varnish is selected and baked so that the glass fiber, insulating varnish, and conductor are firmly bonded into an integrated structure.

The fiber covering consists of a combination of polyester and glass fibers. The glass fibers are electrical-grade continuous-filament glass yarn, while the polyester fibers are high-grade yarn produced through the linear polymerization of ethylene glycol and terephthalic acid. The polyester fiber content does not exceed 50% of the total yarn weight.

Feature

Available Insulation Thickness Grades

PG1 – Bare conductor with one layer of polyester glass fiber or two layers of finer polyester glass fibers meeting the specified dimensions.
PG2 – Bare conductor with two layers of polyester glass fiber.
Grade 1 PG1 – Grade 1 enameled conductor with one layer of polyester glass fiber (PG1).
Grade 1 PG2 – Grade 1 enameled conductor with two layers of polyester glass fiber (PG2).
Grade 2 PG1 – Grade 2 enameled conductor with one layer of polyester glass fiber (PG1).
Grade 2 PG2 – Grade 2 enameled conductor with two layers of polyester glass fiber (PG2).

Tolerance on Conductor Dimensions

The tolerance on conductor dimensions for polyester glass-fiber wound varnish enameled rectangular copper wire varies according to the nominal conductor size.

Nominal Width or Thickness of Conductor (mm)		Tolerance (mm)
Over	Up to and Including
–	3.15	±0.030
3.15	6.30	±0.050
6.30	12.50	±0.070
12.50	16.00	±0.100

Fields Are Most Widely Used:

Motor Manufacturing: Provides excellent electrical insulation and mechanical strength, making it suitable for high-speed, high-temperature, and high-voltage operating environments.

Transformer Manufacturing: Withstands high voltages and elevated operating temperatures while providing outstanding electrical insulation to ensure reliable transformer performance and operational safety.

Inductor Manufacturing: Delivers stable electrical performance and excellent heat resistance, ensuring reliable operation in a wide range of inductor applications.

Automotive Electronics: Its excellent electrical properties, mechanical strength, and high-temperature resistance make it an ideal choice for electric vehicles and other automotive electronic systems.

Increase in Dimensions Due to the Insulation

Nominal Width of Conductor (mm)		Increase in Dimensions (mm)
		Polyester-Glass Fiber Covering Over Bare Conductor						Polyester-Glass Fiber Covering Over Grade 1 Enameled Wire						Polyester-Glass Fiber Covering Over Grade 2 Enameled Wire
		Single Covering (PG1)			Double Covering (PG2)			Single Covering (Grade 1 PG1)			Double Covering (Grade 1 PG2)			Single Covering (Grade 2 PG1)			Double Covering (Grade 2 PG2)
Over	Up to incl.	Min.	Nom.	Max.	Min.	Nom.	Max.	Min.	Nom.	Max.	Min.	Nom.	Max.	Min.	Nom.	Max.	Min.	Nom.	Max.
-	3.15	0.08	0.12	0.16	0.19	0.25	0.31	0.14	0.21	0.27	0.25	0.34	0.42	0.20	0.27	0.33	0.31	0.40	0.48
3.15	6.30	0.10	0.14	0.18	0.21	0.28	0.35	0.16	0.23	0.29	0.27	0.37	0.46	0.22	0.29	0.35	0.33	0.43	0.52
6.30	12.50	0.11	0.16	0.21	0.22	0.30	0.38	0.17	0.25	0.32	0.28	0.39	0.49	0.23	0.31	0.38	0.34	0.45	0.55
12.50	16.00	0.12	0.18	0.24	0.24	0.32	0.40	0.18	0.27	0.35	0.30	0.41	0.51	0.24	0.33	0.41	0.36	0.47	0.57