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EPSILON EM-570
GEN-4 RTV SILICONE RUBBER HIGH VOLTAGE INSULATOR COATING
TECHNICAL DATASHEET & SPECIFICATIONS
Rev. 15; January 2015
TABLE OF CONTENTS
Contents
Introduction ______________________________________________________________________________________________ 1
Technical Specifications __________________________________________________________________________________ 2
Storage, Handling, Application and Maintenance ______________________________________________________ 3
List of Tests Conducted __________________________________________________________________________________ 5
More Information_________________________________________________________________________________________ 6
Contact Us _________________________________________________________________________________________________ 6
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 1
Introduction
ONE-PART ULTRA-HYDROPHOBIC COATING
Epsilon Gen-4 EM-570 is an ultra-hydrophobic UV-resistant coating that enhances an insulator's surface
properties to prevent the formation of a conductive layer even in the most polluted of environments.
The HVIC is designed to protect AC and DC insulators of up to 1200kV class.
INTENDED USAGE
Coastal, Industrial and other forms of pollution are a major cause for leakage current, corona, arcing and
flashovers across insulators (porcelain, glass, ceramic and silicone composite rubber insulators) at
switchyards and substations. The application of EM-570 HVIC on insulators is a proven and 100% effective
method to mitigate the risks of pollution and eliminate flashovers - while reducing or even altogether
eliminating the need for insulator washing.
Figure 2: Coated Insulators
Epsilon EM-570 HVIC may also be used on aging composite insulators to avoid degradation and enhance
the life of such insulators. HVIC can also be used on metallic substrates as a ‘paintable electrical
insulation’ due to the high dielectric strength and resistance to UV rays
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 2
Technical Specifications
Epsilon EM-570 Gen-4 RTV HVIC
Type One part, RTV
Appearance Paint
Specific Gravity ≥ 1.26
Primary Filler Type Quartz
Secondary Filler ATH
Color Gray
Usage Temperature Range ºC -4°C to 121°C
Cure Method Oxime
Skin-over time at standard conditions* 15 minutes
Tack free at 25°C and 50% RH 30 minutes
Min Percent Solids (By Weight) ≥ 78%
Min Percent Solids (By Volume) ≥ 64%
Viscosity, cps 1700 to 2500
As cured – at standard conditions* for 7 days
Dielectric Strength, (ASTM D 149) 36.0 kV/mm
Volume resistivity, ohm.cm (ASTM D257) 9.0 × 1014
Dissipation factor at 100Hz (ASTM D150) 0.021
Water Repellency Angle 118° ± 3°
Tracking wheel withstand, hours 1,000 Hours
Min. Salinity Level withstood during Artificial Pollution Test on flashed-over and coated string of disc insulators (400kV)
112 kg/m3
Hydrophobicity Recovery within 48 hours (REC 76/2006) To HC2
Aerosol Can available for purchase (for touch-ups) Yes
Method of Application Airless Spray, brush or roller
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 3
Storage, Handling, Application and Maintenance
STORAGE & HANDLING
• Store in a cool and dry place with adequate ventilation. Keep containers tightly sealed.
• Moisture ingress could lead to unwanted and premature curing of the HVIC.
• Material must be agitated thoroughly prior to use.
• Keep away from heat, sparks, open flame and moisture
• For a detailed safety procedures, please refer to the product Material Safety & Datasheet (MSDS)
• The coating has a shelf life of 12 months from date of delivery to the customer and must be
applied within that period for warranties to hold good
SAFETY
• Please refer to the latest version of the MSDS
HVIC QUANTITY ESTIMATION
Considering HVIC usage is largely dependent upon formulation, application efficiencies, applicator
training, equipment design, weather conditions and other parameters, it is recommended that the
BOQ of equipment to be coated is informed to Epsilon who can provide a detailed calculation of HVIC
usage. A request for an HVIC quantity calculation can be made here.
APPLICATION
Application of HVIC must be conducted by the Epsilon Asia Group or by qualified personnel with suitable
training. Application must be conducted in an off-line state in accordance with:
IEEE Standard_1523 2002_Application maintenance and Evaluation for HVICs And Epsilon RTV HVIC Insulator Coating Application Maintenance and Handling Procedure (V12 or later) In most cases, the Epsilon standard exceeds the IEEE standard and Epsilon HVIC procedure V12 (or later) will be followed. Target thickness of the coating must be after an assessment of site conditions and as per relevant ‘coating thickness table’ stated in the Epsilon RTV HVIC Insulator Coating Application Maintenance and Handling Procedure
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 4
POST-APPLICATION MAINTENANCE
Maintenance not needed after application of Gen-4 HVIC in most cases. However, it is advisable to refer to the Epsilon RTV HVIC Insulator Coating Application Maintenance and Handling Procedure or contact an Epsilon representative. Insulator washing is not required in most cases but if washing is desired, pressure of 400 psi (7.6 bar) should not be exceeded. Care should be taken to not climb on, scratch or physically harm the coating. However, performance of the coating will not be degraded by minor nicks or cuts.
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 5
List of Tests Conducted
1 CPRI - Artificial Pollution Test by Salt Fog Method on coated 'flashed-over' insulators
2 CPRI - Hydrophobicity Recovery Test REC 76/2206
3 ESKOM - Heavy to very Heavy Pollution Test
4 IEC 06587 EM-570 HVIC Tracking and Erosion - Martin Testing Lab (4.5kV)
5 IEC 06587 EM-570 HVIC Tracking and Erosion – Univ. of Waterloo (2.5kV and 4.5kV)
6 ASTM G53 EM-570 HVIC 5000 hour test
7 Water Immersion/Absorption Test – Univ. of Waterloo
8 Hydrophobicity Retention Test – Univ. of Waterloo
9 Hydrophobicity Assessment of – Univ. of Waterloo
10 CEA Purchasing Spec LWIWG -02(96) Water Penetration Test - Power Labs
11 CEA Purchasing Spec LWIWG -01(96) Tracking Wheel & Erosion Test - Powertech Labs
12 ASTM D150 - Relative Permittivity and Dissipation Factor - University of Waterloo
13 Water Repellency Angle Test - University of Waterloo
14 Dielectric Breakdown Strength Test as per ASTM D149 - University of Waterloo
15 Inclined Plane Tracking Test as per ASTM D2303 - University of Waterloo
EM-570 GEN-4 RTV HIGH VOLTAGE INSULATOR COATING
Page 6
More Information
1. Case studies using RTV Coatings across various industries like power generation, transmission,
distribution, metals, cements, refineries, sugar and chemicals
2. Scientific/academic papers authored by Epsilon Asia Group
3. A technical paper authored by TATA POWER/CGPL 4,000 MW Power Plant in Mundra, India
regarding their experiences with Gen-4 RTV Coating
Contact Us
Please visit us at our website, telephone our offices or write to us at just-ask@epsilonasia.com
Epsilon Asia Group
Worldwide Sales incl. India: Avanza Epsilon Elektro Pvt. Ltd.:
X-29 Hauz Khas, New Delhi – 110016; T: +91.11.4101.4888; F: +91.11.4102.2525
SE Asia and Australia-Pacific: Epsilon Engineering (Thailand) Co. Ltd.:
Level 29, The Offices at CentralWorld, 999/9 Rama-I Road, Bangkok 10330, Thailand;
T: +66.2.207.2487; +66.8148.29021
www.epsilonasia.com
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