🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BSI PD IEC/TS 62257-5:2015:2016 Edition

BSI PD IEC/TS 62257-5:2015:2016 Edition

$189.07

Recommendations for renewable energy and hybrid systems for rural electrification – Protection against electrical hazards

Published By Publication Date Number of Pages
BSI 2016 50
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

IEC TS 62257-5:2015(E) specifies the general requirements for the protection of persons and equipment against electrical hazards to be applied in decentralised rural electrification systems. Requirements dealing with protection against electric shock are based on basic rules from IEC 61140 and IEC 60364. Decentralized Rural Electrification Systems are designed to supply electric power for sites which are not connected to a large interconnected system, or a national grid, in order to meet basic needs. Examples of such sites: isolated dwellings, village houses, community services, economic activities, etc. The main technical changes with regard to the previous edition are as follows: – redefine the maximum AC voltage from 500 V to 1 000 V, the maximum DC voltage from 750 V to 1 500 V; – removal of the limitation of 100 kVA system size. This publication is to be read in conjunction with /2.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope
2 Normative references
11 3 Terms and definitions
13 4 Classification of decentralised rural electrification systems
5 Protection against electric shock
5.1 General
5.2 Requirements on the d.c. side of a DRES
Tables
Table 1 – Typology of decentralized electrification systems
14 5.3 Requirements on the a.c. side of a DRES
5.3.1 General
5.3.2 TT system
5.3.3 TN system
Table 2 – Rated operating residual current of the protective device depending on the value of the earthing resistance
15 6 Protection against overcurrent
6.1 General
6.2 Protection against overload currents
6.3 Protection against short-circuits
7 Protection against risk of fire
16 8 Protection against effects of lightning
8.1 Principle
8.2 Examples
8.3 Protection against overvoltage
8.4 Protection against direct lightning
9 Determination of the pick up area of a rod or wire (see IEC 62305-3:2010)
9.1 General
9.2 Operational conditions and external influences
17 9.3 Wiring system
9.4 Isolation and switching
9.4.1 Isolation
18 9.4.2 Over-current protective devices
Table 3 – Number of protected poles with regard to the characteristics of the distribution system
19 9.4.3 Residual Current Devices (RCD)
9.5 Surge protective devices
20 9.6 Earthing arrangement, protective conductors and protective bonding conductors
9.6.1 Earth electrodes
21 9.6.2 Protective bonding conductors
10 Verification
11 Operation and maintenance
22 Annexes
Annex A (informative) Protection against electric shock in electrical installations
A.1 Protection against electric shock
A.2 Automatic disconnection of supply
A.2.1 General
23 A.2.2 In TN systems
A.2.3 In TT systems
24 A.3 Double or reinforced insulation
A.4 Extra-low-voltage (SELV and PELV)
A.5 Electrical separation
25 A.6 Additional protection
26 Annex B (informative) Types of LV distribution systems earthing
B.1 Terms and definitions
Figures
Figure B.1 – General outline of the distribution system
27 B.2 Types of system earthing used in DRES (Figures are from IEC 60364-1:2005)
B.2.1 General
Figure B.2 – Distribution system of the smallest type
29 B.2.2 AC TN systems
30 Figure B.3 – TN-S system 3-phase, 4-wire with separate neutral conductor and protective conductor throughout the distribution system
31 Figure B.4 – TN-S system 3-phase, 3-wire with separate earthed line conductor and protective conductor throughout the distribution system
32 Figure B.5 – TN-S system 3-phase, 3-wire with protective conductor and no distributed neutral conductor throughout the distribution system
33 Figure B.6 – TN-C-S system 3-phase, 4-wire where the PEN conductor is separatedinto the protective conductor PE and the neutral conductor Nelsewhere in the electrical installation
34 Figure B.7 – TN-C-S system 3-phase, 4-wire where the PEN conductor is separatedinto the protective conductor PE and the neutral conductor Nat the origin of the electrical installation
Figure B.8 – TN-C-S system – single-phase, 2-wire where the PEN conductor is separated into the protective conductor PE and the neutral conductor Nat the origin of the electrical installation
35 Figure B.9 – TN-C system 3-phase, 4-wire with neutral and protective conductor functions combined in a single conductor throughout the distribution system
36 B.2.3 AC TT systems
Figure B.10 – TN-S multiple source system 3-phase, 4-wire with separate protective conductor and neutral conductor to current using equipment
37 Figure B.11 – TT system 3-phase, 4-wire with earthed protective conductor and neutral conductor throughout the distribution system
Figure B.12 – TT system 3-phase, 3-wire with earthed protective conductor and no distributed neutral conductor throughout the distribution system
38 B.2.4 DC distribution systems
39 Figure B.13 – TN-S d.c. system
40 Figure B.14 – TN-C d.c. system
41 Figure B.15 – TN-C-S d.c. system
42 Figure B.16 – TT d.c. system
43 Annex C (informative) Classification of electrical equipment
C.1 Classification of residual current devices (RCDs) (see IEC 61008, IEC  61009, IEC  60755, IEC  60947-2, IEC 62423)
44 C.2 Classification of circuit breakers for a.c. operation (see IEC 60898-1, IEC 60947-2)
45 C.3 Classification of surge protective devices (see IEC 61643-11)
46 Annex D (informative) General information concerning protection against lightning
D.1 General
Figure D.1 – Example of effects of a lightning stroke
47 D.2 Protection against lightning – Principles
48 Bibliography

Related products

BSI PD IEC/TS 62257-5:2015
$189.07