Upload
asiez
View
1.169
Download
4
Tags:
Embed Size (px)
DESCRIPTION
asi-ez.com Branch or Supplemental Circuit Protection? UL489 or UL1077 Circuit Breakers? What You Need to Know to pick the correct circuit protection for your application.
Citation preview
1
UL489 or UL1077What you need to know to ensure you have
the right circuit protection for your application
www.asi-ez.com 877-650-5160
By: Richard Goodhart, Product Manager
Automation Systems Interconnect
2
Branch Protection
UL489 Listed
www.asi-ez.com 877-650-5160
UL489
3
“Branch circuit protection refers
to circuit protection at the panel box”
- Kenneth Cybart,
Electronic Design
www.asi-ez.com 877-650-5160
UL489
4
Applications: Control Panels Panel-Boards Switchboards Motor Control Centers
www.asi-ez.com 877-650-5160
UL489
5
Required for: - Convenience receptacle circuits (internal or external)
- External load circuit leaving the equipment
- Motors in equipment
- HACR equipment (heating, air Conditioning and Refrigeration)
www.asi-ez.com 877-650-5160
UL489
6
Supplemental Protection UL1077 Recognized
www.asi-ez.com 877-650-5160
UL1077
7
“supplementary overcurrent protective device is intended to
provide limited overcurrent protection for specific
applications and equipment” – UL
Reference: Supplementary Protection or
Branch Circuit Overcurrent Device
www.asi-ez.com 877-650-5160
UL1077
8
Applications: Control Circuits Power Transformers Relays PLC I/O Points Lighting Circuits
www.asi-ez.com 877-650-5160
UL1077
9
Applications:
Provides additional protection for sensitive electronics
Load side branch protection: Computers and microprocessors, Communication equipment, Electronic controllers, Power supplies, and Many other types of equipment
Motor control circuit without transformers in circuit per NEC 430-72
www.asi-ez.com 877-650-5160
UL1077
10
Great Replacement for Fuses!
www.asi-ez.com 877-650-5160
UL1077
11
UL1077 Circuit Breaker (Supplemental) Cannot Be Used in Place of a UL489 Circuit Breaker (Branch)
www.asi-ez.com 877-650-5160
UL1077
12www.asi-ez.com 877-650-5160
Feeder Circuit UL489 Miniature Circuit Breaker (MCB)
UL489 MCB
Outlet
UL1077 MCBPower Supply
UL1077 MCBComputer
UL489 MCB ExternalMotor
UL489 MCBHeatingUnit
UL1077 MCB CommunicationEquipment
Application Example
13
Click icon to add pictureContact US
For More
Circuit Breaker Information:
asi-ez.com 877-650-5160
www.asi-ez.com 877-650-5160