Coating for Busbar by Electrostatic Spray Application

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Coating for Busbar by Electrostatic Spray Application

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Coating for Busbar by Electrostatic Spray Application Specification

Chemical Name
Polyester Resin (Typical for busbar powder coatings)

CAS No
N/A (Mixture of polymeric compounds)

Type
Electrostatic Powder Coating

Standard
IEC 60439, ASTM D3359, or as per manufacturer specification

Grade
Industrial/Busbar Grade

Usage
Protective and insulating coating for electrical busbars

Appearance
Available in various colors (brown, black, red, grey, white, yellow, cream, etc.)

Physical Form
Powder

Pack Size
10 kg, 20 kg, 25 kg

Pack Type
Sealed HDPE liner inside cardboard box

Service Temperature
-40C to +120C (continuous exposure)

Application Method
Electrostatic Spray Application

Film Thickness
60-120 microns (recommended for busbar insulation)

Adhesion
Excellent (passes cross-hatch test ASTM D3359)

Toxicology
Non-toxic after curing, contains no heavy metals, RoHS compliant

Hardness
2H - 3H (pencil hardness)

Corrosion Resistance
Excellent, salt spray test > 1000 hours

Custom Colors
Available upon request

VOC Content
Zero

Gloss Levels
Matt, Semi-gloss, Gloss, Texture

Shelf Life
12 months from date of manufacture (when stored below 25C, dry & sealed)

Surface Preparation
Surface must be degreased and grit-blasted prior to application

Curing Schedule
180C - 200C for 10-15 minutes

Dielectric Strength
> 50 kV/mm (typical for busbar coatings)

Coating for Busbar by Electrostatic Spray Application About

Product Description

MT-EL-HLF59R is a one part, 100 % solids, epoxy powder coating for insulation of wire and busbars. Designed for electrostatic spray application it has excellent resistance against heat, chemicals and moisture. The coating has a good edge coverage and flexibility. It is serviceable up to 130 C.

Powder Properties

	Typical value	Method
Binder System	Epoxy resin
Density	1.75 1.85 g/cm	ISO 8130-2
Gel time at 200 C	30 50 sec.	modified ISO 8130-6
Storage stability	6 months from date of manufacture at 23 C

Application Data

Preheating temperature	190 235 C object temperature
Post cure conditions	5 10 min. at above temperature
Particle size distribution	< 32 m = 25 40 % < 160 m > 99.5 %	Malvern ISO 8130-1

Material Properties

Color	grey, ca. RAL 7047
Recommended film thickness	200 300 m
Flow	smooth
Gloss at 60 angle	40 60 units	ISO 2813
Cross cut	Gt 0	DIN EN ISO 2409
Impact resistance	> 5 Joule	DIN 3476-1
Elongation	> 5 %	DIN 3476-1
Hardness	> 100	DIN EN ISO 2815
Pencil hardness	5 H	DIN EN 13523-4
Glass transition temperature	65 7 C (Tg1) 112 5 C (Tg2) 40 60 J/g (Delta H)	ISO 11357-2 Inflection point Inflection point
Temperature index	130 C (Class B)	IEC 60216-1
Water absorption (40 h / 23 C)	< 1 %	ASTM D 570
Thermal conductivity	0.4 0.5 W/(mK)	DIN EN 821

Typical Electrical Properties

Specific surface resistivity	> 1013	IEC 60093
Dielectric strength	45 kV/mm	IEC 60243-1
Dissipation factor tan , 25 C Dissipation factor tan , 105 C	< 0.01 < 0.01	ASTM D 150 ASTM D 150
Dielectric constant (100 Hz 1 MHZ)	4.0	ASTM D 149
Comparative tracking index (CTI)	CTI 600 / CTI 175M-1.1	IEC 60112
UL 94 Vertical Burning Test	V-0	IEC 60695-11-10
Hot wire ignition (HWI)	120 sec.	IEC 60695-2-20
High current arc ignition (HAI)	150	UL 746A Section 32

Superior Insulation and Protection

This coating delivers exceptional electrical insulation with a dielectric strength exceeding 50 kV/mm, making it ideal for busbars in demanding environments. Its excellent adhesion, surface preparation requirements, and advanced corrosion resistance ensure durable performance and safety. The zero VOC formula, absence of heavy metals, and compliance with RoHS and major international standards make it a safe, eco-friendly choice for industrial applications.

Customizable Colors and Finishes

Available in a wide variety of colors including brown, black, red, grey, white, yellow, and cream, the coating can match your specific requirements. Choose from multiple gloss levels and textures for aesthetic and functional purposes. Custom shades can be requested to suit corporate or technical specifications, ensuring optimal integration with your electrical systems while maintaining a professional appearance.

FAQ's of Coating for Busbar by Electrostatic Spray Application:

Q: How is the coating applied to busbars?

A: The coating is applied using an electrostatic spray technique. After cleaning and grit-blasting the surface, the powder is sprayed evenly onto the busbar, then cured at 180C to 200C for 10-15 minutes to ensure proper adhesion and insulation.

Q: What film thickness is recommended for insulating busbars, and why?

A: A film thickness of 60-120 microns is recommended for busbar insulation. This range ensures optimal electrical insulation, mechanical protection, and durability without compromising flexibility or performance.

Q: When can the coated busbar be put into use after application?

A: Busbars can be handled and put into service once the coating has completed its curing cycle-typically 10-15 minutes at 180C-200C-followed by sufficient cooling. The cured coating provides immediate insulation and protection.

Q: Where can this busbar coating be used?

A: This industrial-grade coating is suitable for electrical busbars in switchboards, panels, and distribution assemblies across utility, industrial, and infrastructure applications, where robust insulation and corrosion resistance are required.

Q: What are the main process steps for optimal coating performance?

A: First, degrease and grit-blast the busbar surface for proper adhesion. Next, uniformly apply the powder by electrostatic spray. Finish by curing at the recommended temperature and time. Proper process ensures high dielectric performance and durability.

Q: What are the advantages of using this powder coating for busbars?

A: Benefits include superior electrical insulation, excellent adhesion and corrosion resistance, non-toxic properties, zero VOC emissions, and customization in colors and finishes. It's also RoHS compliant and suitable for continuous high-temperature service.

Q: How should the coating powder be stored and what is its shelf life?

A: The powder should be stored in sealed packaging below 25C in a dry environment. Under these conditions, it maintains its properties for up to 12 months from the manufacturing date.

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