UL Asia
Asia Issue 13 (Spring, 2005)   UL
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UL 508 - The UL Safety Standard for  Industrial Control Equipment
Industrial Control Equipment is a term commonly used to represent discrete components ranging from selector switches, relays, contactors, motor starters, timers, pilot lights, to complex system of these components. It encompasses more than 30 different product categories and 100 different devices (See Figure1).

Figure 1: Examples of industrial control devices covered by UL 508
Industrial Control Devices Examples
Motor starters and controllers Including manual, magnetic, and solid-state starters and controllers
Overload relays Including thermal, magnetic, and solid-state overload relays
Control circuit switches and relays Including pushbutton stations, selector switches, time-delay relays and pilot lights
Switches Including float, flow, pressure, vacuum-operated, mercury-tube and proximity switches
Autotransformers, resistors and rheostats Variable voltage and motor starting
Programmable controllers Including numerical control systems and industrial microprocessor/computer systems

Industrial Control Equipment is used extensively in industrial applications including starting, stopping, regulating, controlling, reversing, changing speed, or protecting electric motors. Components for motor control are installed primarily in control panels, motor control centers, industrial machines as well as energy distribution assemblies.

Industrial Control Equipment is required to be designed, built and evaluated for their function and safety in compliance with an established National / International standard. UL 508, covers the safety requirements for Industrial Control Equipment.

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In this issue
Get ready for EU's 2006 RoHS directive with UL's New Restricted Substances Compliance Solutions (RSCS)
UL 508 - The UL Safety Standard for Industrial Control Equipment
Recent Amendment in Japan's Pharmaceutical Affairs Law (PAL) for Medical Devices
Network Access License (NAL) Approval
Divisions of GE Medical in India to be Certified to ISO 14001:2004
UL University Seminar Schedule
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Standards Update
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