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Siemens UL 508A Industrial Control Panels Manuals
Manuals and User Guides for Siemens UL 508A Industrial Control Panels. We have
1
Siemens UL 508A Industrial Control Panels manual available for free PDF download: Reference Manual
Siemens UL 508A Reference Manual (30 pages)
Brand:
Siemens
| Category:
Industrial Equipment
| Size: 2.34 MB
Table of Contents
Table of Contents
5
Introduction
7
Overview of NEC Article 409
9
Overview of Supplement SB from the UL 508A Standard
11
Basic Steps for Calculating the SCCR of a Control Panel
13
SB4.2 - Determining the Short-Circuit Current Ratings (SCCR) of Individual Power Circuit Components
13
Basic: Device Markings or Component Instruction Sheets
13
Basic: Assumed Short-Circuit Current Rating
14
Basic: Tested Combination of Devices According to UL508
14
SB4.3 - Adaptation of the Available Short-Circuit Current Rating Based on the Peak Let-Through Currents When Using Current-Limiting Devices in the Feeder Circuit
18
Current-Limiting Transformers
18
Current-Limiting Circuit Breakers (According to UL489)
18
Current-Limiting Fuses
20
SB4.4 - SCCR Calculation of the Industrial Control Panel
23
Flow Chart for Calculating the SCCR of a Component
25
Calculation of the Short-Circuit Current Rating of an Individual Power Circuit Component According to UL 508A SB4.2
25
Calculation of the Short-Circuit Current Rating of Current-Limiting Feeder Components
26
Calculation of the Short-Circuit Current Rating of a Control Panel in Accordance with UL 508A Supplement SB 4.4
28
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