Quality QY(F)-3/240 Grade 3 Triple Build Polyimide Enamelled Copper Wire | CHINGCUNG factory

QY(F)-3/240 Grade 3 Triple Build Polyimide Enamelled Copper Wire | CHINGCUNG

Name: QY(F)-3/240 Grade 3 Triple Build Polyimide Enamelled Copper Wire | CHINGCUNG
Brand: Shanghai Husu M&E Technology Co., Ltd
SKU: QY(F)-3/240
Price: 42.00 USD
Availability: InStock

Brand Name

CHINGCUNG

PRODUCT MODEL

QY(F)-3/240

certificate

RoHS

country of origin

Jiangsu

MOQ

500 Kgs

unit price

30.00-55.00 USD/Kg

payment method

T/T

Supply Capacity

100 tons/month

Product Summary

QY(F)-3/240 – Grade 3 Triple Build Polyimide Enamelled Copper Round Wire Insulation: Aromatic Polyimide (PI) | Thermal Class: 240°C | Profile: Round | Film Grade: Grade 3 (Triple Build) When operating conditions push beyond the capability of standard heavy-build insulation, QY(F)-3/240 delivers the ...

Product Description

QY(F)-3/240 – Grade 3 Triple Build Polyimide Enamelled Copper Round Wire

Insulation: Aromatic Polyimide (PI) | Thermal Class: 240°C | Profile: Round | Film Grade: Grade 3 (Triple Build)

When operating conditions push beyond the capability of standard heavy-build insulation, QY(F)-3/240 delivers the highest level of dielectric protection in the QY(F) polyimide series. The Grade 3 triple build adds a substantial polyimide film layer, making this wire the preferred specification for applications where voltage stress, thermal cycling, and environmental aggression occur simultaneously.

The aromatic polyimide insulation is applied in multiple passes and cured to form a dense, continuous barrier. This construction is particularly effective in hermetically sealed compressor motors, high-voltage transformer windings, and downhole instrumentation where failure cannot be serviced. The wire also retains flexibility after baking, allowing it to withstand the mechanical demands of automated coil winding without film cracking.

Why Grade 3 Triple Build

Maximum Dielectric Margin: The thickest polyimide film in the QY(F) range provides the highest breakdown voltage, creating design headroom for high-voltage transients and long-term insulation aging.
Hermetic & Sealed Applications: The dense polyimide barrier resists refrigerant extraction and solvent attack, maintaining insulation integrity in sealed compressor environments.
Downhole & Aerospace Reliability: Withstands the combined stresses of elevated temperature, chemical exposure, and mechanical vibration found in oilfield tools and aircraft actuators.
Proven Thermal Endurance: Rated Class 240 with heat shock resistance verified to 260°C, suitable for continuous duty at the upper limit of organic insulation capability.

Technical Data – Grade 3 (Triple Build)

Conductor Dia. (mm)	Tolerance (±mm)	Min. Film Increase (mm)	Max. Overall Dia. (mm)	Breakdown Voltage (Min)
0.40	±0.005	0.060	0.478	≥ 6600V
0.50	±0.005	0.067	0.587	≥ 7000V
0.80	±0.008	0.085	0.911	≥ 7400V
1.00	±0.010	0.095	1.124	≥ 7600V
2.00	±0.020	0.113	2.148	≥ 8000V
3.00	±0.030	0.125	3.150	≥ 9000V
4.00	±0.040	0.134	4.176	≥ 10000V

Grade 3 is recommended where the highest dielectric strength is required. Grade 1 and Grade 2 available upon request. Breakdown voltage values depend on conductor diameter and test method.

Where QY(F)-3/240 Is Specified

Application	Why Grade 3 Matters
Hermetic Compressor Motors	Resists refrigerant extraction and solvent attack over extended service life
High-Voltage Dry-Type Transformers	Maximum film thickness for turn-to-turn and layer insulation margins
Downhole Oil & Gas Tools	Combined thermal, chemical, and mechanical protection in inaccessible locations
Aerospace Actuators & Motors	Radiation tolerance and thermal stability for critical flight systems
Nuclear & Medical Equipment	Maintains dielectric properties under gamma exposure

Spool Specifications & Tapered Spool Drawing

Our QY(F)-3/240 wires are available on high-precision tapered spools designed for smooth payoff and high-speed winding. The dimensional drawing and standard spool specifications are provided below.

Tapered Spool (Cross-Section)

QY(F)-3/240 Grade 3 Triple Build Polyimide Enamelled Copper Wire | CHINGCUNG

Drawing Reference (Tapered Spool):

• d1: Outer flange diameter

• d4: Barrel (core) diameter

• d14: Inner flange diameter (taper)

• I1: Overall spool height

• I2: Traverse length (winding width)

Spool Type	d1 (mm)	d4 (mm)	I1 (mm)	I2 (mm)	d14 (mm)	Spool Weight (g)	Net Wire Weight (kg)*	Recommended Wire Sizes (mm)	Spools per Box
PT-2	105	20	170	150	115	160	3	0.002 – 0.040	8
PT-4	124	26.5	200	170	140	240	6	0.040 – 0.250	4
PT-10	160	30	230	200	180	420	12	0.250 – 0.900	2
PT-15	180	30	230	200	200	560	18	0.250 – 0.900	1
PT-25	215	32	280	250	230	780	28	0.400 – 2.500	1
PT-45	236	100	400	335	250	2150	45	0.400 – 2.500	1
PT-60	270	45	400	350	300	2750	65	0.400 – 2.500	1
PT-90	300	100	500	425	315	3900	90	1.000 – 5.000	1

* Net wire weight is valid for copper. For other metals, please inquire. Other spool types available upon request.

Grade 2 vs Grade 3 – Selection Guide

Consideration	QY(F)-2/240 (Grade 2)	QY(F)-3/240 (Grade 3)
Insulation Thickness	Heavy Build	Triple Build (thickest)
Breakdown Voltage	Standard high	Maximum
Copper Fill Factor	Higher	Slightly lower
Typical Use	General high-temperature motors	High-voltage / hermetic / critical applications

Ordering Information

Model Format	QY(F)-3/240-D (example: QY(F)-3/240-1.00)
Spool Options	PT-10, PT-15, PT-25, PT-45 (see table above)
MOQ	Negotiable; sample orders accepted
Lead Time	15–20 working days for production quantities
Standards	IEC 60317-46, NEMA MW 16-C, GB/T 6109.22