BS 6626:2010 Maintenance of electrical switchgear and controlgear for voltages above 1 kV and up to and including 36 kV. Code of practice
BS 6626 is a British Standard which gives recommendations and guidance for the maintenance of electrical switchgear and controlgear having a rated a.c. or d.c. voltage above 1 kV and up to and including 36 kV.
BS 6626 doesn’t apply to explosion protected switchgear and controlgear. See BS EN 60079-17.
BS 6626 covers applications above 1 kV. Voltages below 1 kV are considered to be low voltage in line with the European Commission Directive 73/23/EEC [1], known as the “Low voltage directive”.
Contents of BS 6626:
Foreword
Section 1: General
1 Scope
2 Normative references
3 Terms and definitions
4 Maintenance policy
5 Operational policy
6 Competence
Section 2: Safety
7 Personal protective equipment and treatment of persons suffering from electric shock
8 Operational experience
9 Safety rules and procedures for safe systems of work
10 Equipment location
11 Isolation and access for maintenance
12 Preparing for maintenance work
13 Fire extinguishing equipment
14 Testing
15 Disposal of scrap
Section 3: Common recommendations relating to maintenance
16 Manufacturer’s instructions
17 Newly commissioned equipment
18 Frequency of maintenance
19 Records and drawings
20 Replacement parts
21 Cleanliness
22 Marking of covers and connections
23 Quality of connections
24 Maintenance and testing of insulation
25 Maintenance of safety earthing continuity
26 Shutters, locking devices, etc.
27 Interlocks
28 Ventilation
29 Equipment heating and lighting
30 Lifting devices
31 Tripping and closing supplies
32 Equipment tools, spares and test instruments
33 Conclusion of maintenance
Section 4: Additional recommendations relating to the maintenance of specific items
34 Circuit breakers
35 Switches
36 Disconnectors and earthing switches
37 Busbars and busbar chambers
38 Fuses
39 Contactors
40 Overload protective devices
41 Relays
42 Timing devices
43 Protective, measuring and control transformers
44 Instruments including recorders
45 Capacitors
46 Power electronic equipment
47 Cable boxes and terminations
48 Control switches including pushbuttons and limit switches
49 Liquid starters, controllers and resistors
50 Manual controllers
51 Sealed switches
52 Actuators
53 Indicator devices
54 Batteries
55 Compressed air plant
