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UL 991
UL Standard for Safety Tests for Safety-Related Controls Employing Solid-State Devices - Third Edition; Reprint with revisions through and including June 9, 2010
Organization:
UL - UL
Year: 2004
Abstract: These requirements apply to controls that employ solid-state devices and are intended for specified safety-related protective functions.
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.
These requirements do not cover controls covered by end-product standards in which an electronic control investigation is specified.
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.
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.
These requirements do not cover controls covered by end-product standards in which an electronic control investigation is specified.
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.
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| contributor author | UL - UL | |
| date accessioned | 2017-09-04T17:41:47Z | |
| date available | 2017-09-04T17:41:47Z | |
| date copyright | 38282 | |
| date issued | 2004 | |
| identifier other | DYSGSCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/164753 | |
| description abstract | These requirements apply to controls that employ solid-state devices and are intended for specified safety-related protective functions. 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. These requirements do not cover controls covered by end-product standards in which an electronic control investigation is specified. 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. | |
| language | English | |
| title | UL 991 | num |
| title | UL Standard for Safety Tests for Safety-Related Controls Employing Solid-State Devices - Third Edition; Reprint with revisions through and including June 9, 2010 | en |
| type | standard | |
| page | 80 | |
| status | Active | |
| tree | UL - UL:;2004 | |
| contenttype | fulltext |