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IEEE 946 2020

IEEE 946 2020

$47.67

IEEE Recommended Practice for the Design of DC Power Systems for Stationary Applications

Published By Publication Date Number of Pages
IEEE 2020 74
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Revision Standard – Active. Recommended practices for the design of dc power systems for stationary applications are provided in this document. The components of the dc power system addressed by this document include lead-acid and nickel-cadmium storage batteries, static battery chargers, and distribution equipment. Guidance in selecting the quantity and types of equipment, the equipment ratings, interconnections, instrumentation and protection is also provided. This recommendation is applicable for power generation, substation, and telecommunication applications.

PDF Catalog

PDF Pages PDF Title
1 IEEE Std 946™-2020 Front cover
2 Title page
4 Important Notices and Disclaimers Concerning IEEE Standards Documents
8 Participants
10 Introduction
11 Contents
13 1. Overview
1.1 Scope
1.2 Purpose
14 1.3 Exclusions
2. Normative references
15 3. Definitions
16 4. Organization of this recommended practice
5. Description and operation
5.1 General
18 5.2 System design considerations
19 6. Batteries
20 6.1 Number of battery strings
6.2 Determination of battery duty cycle and battery size (capacity)
22 6.3 Installation design
24 6.4 Maintenance, testing, and replacement
6.5 Qualification, relevant codes, and standards
7. Battery chargers
25 7.1 Number of chargers
7.2 Load sharing between paralleled chargers
7.3 Determination of rated output
27 7.4 Installation design
28 7.5 Output characteristics
30 7.6 Qualification
32 8. Distribution system
8.1 System layout
36 8.2 Distribution panels
37 8.3 Available short-circuit current
39 8.4 Protective device description and rating
40 8.5 Voltage ratings for loads
41 8.6 Qualification
42 9. DC power system instrumentation, controls, and alarms
9.1 General
45 9.2 DC power system ground detection
47 9.3 DC bus undervoltage alarm
9.4 Special loading considerations
9.5 Design features to assist in battery testing
48 9.6 Cross-tie between buses
10. Protection against electrical noise, lightning, and switching surges
49 10.1 Electromagnetic interference (EMI), radio-frequency interference (RFI)
10.2 Lightning and switching surges
11. Spare equipment
50 Annex A (informative) Bibliography
52 Annex B (informative) Battery charger sizing—Sample calculations
B.1 General
B.2 Equation
B.3 Example 1: Power generation
53 B.4 Example 2: Substation
B.5 Example 3: Telecommunication
57 Annex C (informative) Battery available short-circuit current—Sample calculations
C.1 Introduction
C.2 Discussion
58 C.3 Sample calculations for a lead-acid battery
60 Annex D (informative) Battery charger and dc power system, short-circuit current contribution
D.1 Introduction
D.2 Combined effect of currents from battery, charger, and connected inductive load
D.3 Sample evaluation
63 Annex E (informative) Effect of unintentional grounds on the operation of dc power systems
E.1 Introduction
E.2 Discussion
64 E.3 Sample evaluations
66 Annex F (informative) Telecommunication-specific considerations
F.1 Telecommunication qualifications
F.2 Telecommunication dc power system distribution design
67 F.3 Telecommunication power plant location
68 F.4 Telecommunication battery sizing considerations
69 F.5 Filter of charging/rectification equipment
70 F.6 Telecommunication rectifier/charger controls and signals
71 Annex G (informative) Load sharing of chargers
72 Annex H (informative) Center tapped battery design considerations
73 Annex I (informative) Additional batteries in nuclear power generation applications
74 Back cover

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IEEE 946 2020
$47.67