Post on 16-Mar-2018
PENTAIR HOFFMAN ® 1
INTRODUCTION
Purpose
• Understand electrical enclosure standards & ratings
Objectives
• Learn how to identify potential enclosure use environments
• Understand the different rating & certification systems
Learning Time
• 15 minutes
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PROTECT FROM THE ELEMENTS
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Industrial automation equipment can be used in almost any environment imaginable. Enclosures must protect critical components from harmful elements to extend their life and prevent expensive operations downtime.
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UNDERSTANDING ENCLOSURE ENVIRONMENTS
1. UNDERSTAND THE ENVIRONMENT IN WHICH ENCLOSURES ARE TO BE USED
• Identify indoor or outdoor • Identify potential
contaminants
2. SELECT THE RATING BASED ON LOCATION AND USE ENVIRONMENT
• Select the Type or IP rating necessary to provide the protection required in the environment
3. SELECT THE ENCLOSURE AND MATERIAL WITH THE PROPER RATINGS
• Select the best solution platform that is ratings compliant
Understand the use environment, select the right enclosure 3
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Understand environment to select the right enclosure
INDUSTRIAL ENCLOSURE ENVIRONMENTS WHAT TO ASK WHEN CLASSIFYING AN INDUSTRIAL ENCLOSURE ENVIRONMENT
WATER, OIL OR LIQUIDS
Does the enclosure need to protect against water, oil or other liquids?
INDOOR OR OUTDOOR
Is the enclosure intended to be located indoors or outdoors?
DUST, DIRT OR SOLIDS
Does the enclosure need to protect against dust, dirt or other solid contaminants?
FALLING OR FORCED
Is the solid or liquid contaminant falling or being forced into the enclosure?
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Commonly recognized industry standards for protection ratings
INDUSTRY STANDARDS ORGANIZATIONS
CSA – CANADIAN STANDARDS ASSOCIATION
CSA Standard C22.2
NEMA – NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
NEMA Standards Publication 250 – Enclosures for Electrical Equipment
UL – UNDERWRITERS LABORATORIES INC.
UL 50 – Enclosures for Electrical Equipment
UL 508A – Industrial Control Panels
IEC – INTERNATIONAL ELECTROTECHNICAL COMMISSION
IEC 60529 – Classification of Degrees of Protection Provided by Enclosures
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Significant differences between industry standards
INDUSTRY STANDARDS COMPARISON
CSA – CANADIAN STANDARDS ASSOCIATION
• Testing in certified
laboratory
• Inspections to ensure compliance
• Specifies construction and performance requirements
NEMA - NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
• Manufacturer
self-declared
• Specifies construction and performance requirements
UL – UNDERWRITERS LABORATORIES INC.
• Testing in certified
laboratory
• Inspections to ensure compliance
• Specifies construction and performance requirements
IEC – INTERNATIONAL ELECTROTECHNICAL COMMISSION
• Manufacturer
self-declared
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NEMA, UL, & CSA RATINGS NORTH AMERICAN TYPE RATINGS SIMILAR ACROSS NEMA, UL AND CSA
Identify enclosure type rating by evaluating use environment
TYPE RATING
INDOOR/ OUTDOOR
PROTECTION FROM TYPICAL APPLICATIONS
TYPE 1 Indoor • Incidental personal contact • Dust and falling dirt
• Climate controlled indoor shelters • Low contamination electrical rooms • Offices and warehouses
TYPE 12 Indoor • Incidental personal contact • Dust and falling dirt • Dripping non-corrosive liquid
• Indoor security and fire applications • Light industrial facilities
TYPE 3R Outdoor • Incidental personal contact • Rain, snow and sleet
• Wireless telecommunications • Outdoor utilities
TYPE 4 Indoor/Outdoor • Incidental personal contact • Dust and falling dirt • Windblown dust and fibers • Hosedown / splashed water
• Cement plants • Outdoor plants • Rubber tire manufacturing • Industrial plants
TYPE 4X Indoor/Outdoor • Incidental personal contact • Dust and falling dirt • Windblown dust and fibers • Hosedown / splashed water • Corrosive agents
• Marine applications • Wastewater treatment facilities • Food and beverage processing plants • Pharmaceuticals and cleanrooms • Petroleum and chemical processing
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INGRESS PROTECTION RATING COMMONLY USED WORLDWIDE OUTSIDE NORTH AMERICA
IEC/IP RATING SYSTEM
I P
Protection against Solid Objects 0 - 6
Protection against Liquids 0 - 8
6 6
IEC/IP ratings cannot be directly compared to NEMA/UL/CSA 8
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IP RATING
PROTECTION FROM SOLIDS
PROTECTION FROM LIQUIDS
TYPICAL APPLICATIONS
IP20/IP30 • Objects 12mm/ 2mm in diameter
• No protection • Climate controlled indoor shelters • Low contamination electrical rooms • Offices and warehouses
IP54/IP55 • Dust (limited ingress) • Water spray • Low pressure jets
• Indoor security and fire applications • Light industrial facilities
IP66 • Dust (no ingress) • Strong water jets • Petroleum and chemical processing • Wastewater treatment facilities • Pharmaceuticals and cleanrooms
IP69K • Dust (no ingress) • High temperature • High pressure water jets
• Food and beverage processing
IEC/IP RATING SYSTEM
Identify enclosure IP rating by evaluating use environment 9
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CHOOSING INDUSTRIAL ENCLOSURE MATERIALS
Environmental ratings a primary factor in material selection
TYPE 1 TYPE 12 TYPE 3R TYPE 4 TYPE 4X
IP20/IP30 IP54/55 IP66 IP69K
MILD STEEL
MILD STEEL MODULAR
STAINLESS STEEL
NON-METALLIC
ALUMINUM
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HOFFMAN TESTING & CERTIFICATION CAPABILITIES
COMPLETE IN-HOUSE, GLOBAL TESTING CAPABILITY ENSURES FULL COMPLIANCE WITH ALL INDUSTRY STANDARDS
Hoffman has an onsite UL & CSA Certified Laboratory 11
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SUMMARY
THINGS A DESIGN ENGINEER NEEDS TO KNOW
1) How to classify an industrial automation enclosure use environment
2) Different standards for industrial automation enclosures
3) NEMA or UL Type ratings and their meaning
4) IP ratings and their meaning
5) Where typical Type or IP ratings are used
6) How to select an enclosure material to meet the rating required
7) Hoffman’s extensive testing and certification capabilities
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Understand the environment, select the right enclosure