Sale!

UL 991

Original price was: $502.00.Current price is: $251.00.

Please note:All interim revisions for this edition available at time of your purchase will be included.

Tests for Safety-Related Controls Employing Solid-State Devices

UL 991

1 Scope

1.1 These requirements apply to controls that employ solid-state devices and are intended for specified safety-related protective functions.

1.2 These requirements address the potential risks unique to the electronic nature of a control. Equipment or components employing an electronic feature shall also comply with the basic construction and performance requirements contained in the applicable end-product or component standard. These requirements are intended to supplement applicable end-product or component standards and are not intended to serve as the sole basis for investigating the risks of fire, electric shock, or injury to persons associated with a control.

1.3 These requirements do not cover controls covered by end-product standards in which an electronic control investigation is specified.

1.4 Sections 9 – 22 contain standardized test methods for investigating the performance of an electronic control when subjected to particular environmental stresses. The suitability of each test to a given control shall be determined by the end-product standard(s). Determination shall include an assessment of:

a)Whether the control will be exposed to a particular environmental stress in its application, and

b)Whether the response of the control to a particular environmental stress is relevant to its intended safety-related protective function in its application.

Edition:
3rd
Published:
10/22/2004
Number of Pages:
78
Note:
This product is unavailable in Ukraine, Russia, Belarus

Reviews

There are no reviews yet.

Be the first to review “UL 991”

Your email address will not be published. Required fields are marked *

Shopping Cart
UL 991
Original price was: $502.00.Current price is: $251.00.