Subject 98C (98, 67, 891, 1741)

Bulletin Dated: April 3, 2017

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Enclosed and Dead-Front Switches, 650 - 1000 Volts, UL 98C.

Subject 489F (489, 1703, 1741, 1973, 2580, 6141, 6142)

Bulletin Dated: January 15, 2015

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Molded-Case Circuit Breakers and Molded-Case Switches for Use with Battery Power Supplies, UL 489F

Subject 9540 (1642, 1741,1973, 1989, 2054, 2202, 2575, 2580)

Bulletin Dated: July 1, 2014

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Energy Storage Systems and Equipment, UL 9540.

Subjects 9741 (458, 458A, 1703, 1741, 1973, 2202, 2231-1, 2231-2, 2251, 2594)

Bulletin Dated: March 20, 2014

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Bidirectional Electric Vehicle (EV) Charging System Equipment, UL 9741

Subject 1741

Bulletin Dated: June 8, 2011

SUMMARY OF TOPICS

The following topics were discussed at the meeting of the Standards Technical Panel for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources:

1. The Roles and Responsibilities of a Standards Technical Panel

2. Discussion of International Harmonization (US adoption of IEC standards)

3. IEC 62109, Safety of Power Converters for Use in Photovoltaic Power Systems

4. Additional Rating For Input Source Circuit Overcurrent Protection

5. Revision to Update AC Module PV Connectors

6. Addition of a Reference to the Outline of Investigation for Batteries for Use in Light Electric Rail (LER) Applications and Stationary Applications, Subject 1973

7. Combiner Boxes

8. Non-Isolated EPS Interactive PV Inverters Rated Less Than 30 Kva

9. Ground Fault Detection Interruption Requirements

10. Ground Fault Protection Operation Impact on Product Grounding

11. AC Modules Updates

12. Micro-Inverters

13. Wiring Harnesses

14. Solar Gain

15. Grounding

16. Stand Alone Inverter Power Quality

17. Installation Instructions

18. Southern California Edison (SCE) Building-top PV Impact Studies

19. Update on Task Group to Review and Address UL 1741 Concerning Emission Limits and Permit Voltage Distortion

20. Smart Grid

21. New IEEE 1547 Documents

22. Input Source Backfeed

23. Short Circuit Withstand Rating

24. Discussion of New Power Conversion Equipment Normal and Abnormal Operation Conditions and their Impact on PV Modules

25. Touch Safe Utility Interactive Inverter Output Terminals

26. Additional Meeting Topic Regarding an Overview of Draft IEC Document 61000-3-15

27. Additional Meeting Topic Regarding a General Discussion of the Issues Related to Ground Fault Detection

28. Additional Meeting Topic Regarding the Status of the New Outline of Investigation for Photovoltaic (PV) DC Arc-Fault Circuit Protection, Subject 1699B

29. Additional Meeting Topic Regarding Guidelines for Ensuring a Safe Voltage and Current Potential After Shutdown

Subjects 3703 (1703, 1741, and 8703)

Bulletin Dated: May 9, 2011

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Solar Trackers, Subject 3703

Subject 1699B (1699, 1703, 1741)

Bulletin Dated: May 5, 2011

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Photovoltaic (PV) DC Arc-Fault Circuit Protection, Subject 1699B. These requirements cover DC photovoltaic arc-fault circuit protection devices intended for use in solar photovoltaic electrical energy systems as described in Article 690 of the National Electrical Code, NFPA 70. This protection is intended to mitigate the effects of arcing faults that may pose a risk of fire ignition under certain conditions if the arcing persists.

These requirements cover devices including photovoltaic (PV) dc arc-fault circuit-interrupters (AFCI), arc-fault detectors (AFD), interrupting devices (ID) and inverters, converters, and charge controllers with integral arc-fault circuit-interrupter protection, and rated 1000 volts or less. They are intended for use in dc electrical systems that are supplied by a photovoltaic source, such as a module with solar cells designed to generate dc power when exposed to sunlight.

These requirements are intended to be used with the Standard for Arc-Fault Circuit-Interrupters, UL 1699.

Subjects 2703 (1703 and 1741)

Bulletin Dated: October 7, 2010

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Rack Mounting Systems and Clamping Devices for Flat-Plate Photovoltaic Modules and Panels, Subject 2703

Subject 98B (98, 1741)

Bulletin Dated: August 11, 2010

Summary of Topics

This bulletin announces the availability of the Outline of Investigation for Enclosed and Dead-Front Switches for Use in Photovoltaic Systems, Subject 98B.