IEC 62109-1
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
Safety of power converters for use in photovoltaic power systems –
Part 1: General requirements
IEC 62109-1:2010(E)
®
colour
inside
IEC 62109-1
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
Safety of power converters for use in photovoltaic power systems –
Part 1: General requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
XG
ICS 27.160
PRICE CODE
ISBN 978-2-88910-621-9
® Registered trademark of the International Electrotechnical Commission
®
colour
inside
– 2 – 62109-1 © IEC:2010(E)
CONTENTS
FOREWORD...........................................................................................................................8
INTRODUCTION...................................................................................................................10
1 Scope and object............................................................................................................11
1.1 Scope....................................................................................................................11
1.1.1 Equipment included in scope .....................................................................11
1.1.2 Equipment for which other requirements may apply ...................................11
1.2 Object ...................................................................................................................11
1.2.1 Aspects included in scope .........................................................................11
1.2.2 Aspects excluded from scope ....................................................................12
2 Normative references .....................................................................................................12
3 Terms and definitions .....................................................................................................15
4 General testing requirements..........................................................................................25
4.1 General .................................................................................................................25
4.2 General conditions for testing................................................................................ 25
4.2.1 Sequence of tests......................................................................................25
4.2.2 Reference test conditions ..........................................................................25
4.3 Thermal testing .....................................................................................................28
4.3.1 General .....................................................................................................28
4.3.2 Maximum temperatures .............................................................................28
4.4 Testing in single fault condition .............................................................................31
4.4.1 General .....................................................................................................31
4.4.2 Test conditions and duration for testing under fault conditions...................31
4.4.3 Pass/fail criteria for testing under fault conditions ......................................32
4.4.4 Single fault conditions to be applied .......................................................... 33
4.5 Humidity preconditioning .......................................................................................36
4.5.1 General .....................................................................................................36
4.5.2 Conditions .................................................................................................36
4.6 Backfeed voltage protection ..................................................................................36
4.6.1 Backfeed tests under normal conditions.....................................................37
4.6.2 Backfeed tests under single-fault conditions ..............................................37
4.6.3 Compliance with backfeed tests.................................................................37
4.7 Electrical ratings tests ...........................................................................................37
4.7.1 Input ratings ..............................................................................................37
4.7.2 Output ratings............................................................................................37
5 Marking and documentation............................................................................................37
5.1 Marking .................................................................................................................37
5.1.1 General .....................................................................................................37
5.1.2 Durability of markings ................................................................................38
5.1.3 Identification..............................................................................................38
5.1.4 Equipment ratings......................................................................................38
5.1.5 Fuse identification .....................................................................................38
5.1.6 Terminals, connections and controls..........................................................39
5.1.7 Switches and circuit-breakers ....................................................................39
5.1.8 Class II equipment.....................................................................................39
5.1.9 Terminal boxes for external connections....................................................40
5.2 Warning markings .................................................................................................40
62109-1 © IEC:2010(E) – 3 –
5.2.1
Visibility and legibility requirements for warning markings..........................40
5.2.2 Content for warning markings ....................................................................40
5.2.3 Sonic hazard markings and instructions.....................................................41
5.2.4 Equipment with multiple sources of supply.................................................41
5.2.5 Excessive touch current.............................................................................41
5.3 Documentation ......................................................................................................42
5.3.1 General .....................................................................................................42
5.3.2 Information related to installation...............................................................42
5.3.3 Information related to operation.................................................................43
5.3.4 Information related to maintenance............................................................44
6 Environmental requirements and conditions....................................................................44
6.1 Environmental categories and minimum environmental conditions .........................45
6.1.1 Outdoor .....................................................................................................45
6.1.2 Indoor, unconditioned ................................................................................45
6.1.3 Indoor, conditioned....................................................................................45
6.2 Pollution degree ....................................................................................................46
6.3 Ingress protection..................................................................................................47
6.4 UV exposure .........................................................................................................47
6.5 Temperature and humidity .....................................................................................47
7 Protection against electric shock and energy hazards.....................................................47
7.1 General .................................................................................................................47
7.2 Fault conditions.....................................................................................................47
7.3 Protection against electric shock ...........................................................................48
7.3.1 General .....................................................................................................48
7.3.2 Decisive voltage classification ...................................................................48
7.3.3 Protective separation.................................................................................52
7.3.4 Protection against direct contact................................................................52
7.3.5 Protection in case of direct contact ............................................................57
7.3.6 Protection against indirect contact .............................................................60
7.3.7 Insulation including clearance and creepage distances.............................. 68
7.3.8 Residual Current Detection (RCD) or Monitoring (RCM) device
compatibility ..............................................................................................
79
7.3.9 Protection against shock hazard due to stored energy...............................80
7.4 Protection against energy hazards ........................................................................80
7.4.1 Determination of hazardous energy level ...................................................80
7.4.2 Operator access areas ..............................................................................81
7.4.3 Service access areas ................................................................................81
7.5 Electrical tests related to shock hazard .................................................................81
7.5.1 Impulse voltage test (type test)..................................................................81
7.5.2 Voltage test (dielectric strength test) (type test and routine test)................ 83
7.5.3 Partial discharge test (type test or sample test) .........................................87
7.5.4 Touch current measurement (type test) .....................................................88
7.5.5 Equipment with multiple sources of supply.................................................89
8 Protection against mechanical hazards...........................................................................89
8.1 General .................................................................................................................89
8.2 Moving parts .........................................................................................................90
8.2.1 Protection of service persons ....................................................................90
8.3 Stability .................................................................................................................90
8.4 Provisions for lifting and carrying...........................................................................91
– 4 – 62109-1 © IEC:2010(E)
8.5
Wall mounting .......................................................................................................91
8.6 Expelled parts .......................................................................................................92
9 Protection against fire hazards .......................................................................................92
9.1 Resistance to fire ..................................................................................................92
9.1.1 Reducing the risk of ignition and spread of flame.......................................92
9.1.2 Conditions for a fire enclosure ................................................................... 93
9.1.3 Materials requirements for protection against fire hazard...........................93
9.1.4 Openings in fire enclosures .......................................................................96
9.2 Limited power sources......................................................................................... 100
9.2.1 General ................................................................................................... 100
9.2.2 Limited power source tests ...................................................................... 100
9.3 Short-circuit and overcurrent protection............................................................... 101
9.3.1 General ................................................................................................... 101
9.3.2 Number and location of overcurrent protective devices ............................ 101
9.3.3 Short-circuit co-ordination (backup protection)......................................... 102
10 Protection against sonic pressure hazards.................................................................... 102
10.1 General ...............................................................................................................102
10.2 Sonic pressure and sound level........................................................................... 102
10.2.1 Hazardous noise levels............................................................................ 102
11 Protection against liquid hazards .................................................................................. 103
11.1 Liquid containment, pressure and leakage........................................................... 103
11.2 Fluid pressure and leakage ................................................................................. 103
11.2.1 Maximum pressure ..................................................................................103
11.2.2 Leakage from parts..................................................................................104
11.2.3 Overpressure safety device ..................................................................... 104
11.3 Oil and grease..................................................................................................... 104
12 Chemical hazards......................................................................................................... 104
12.1 General ...............................................................................................................104
13 Physical requirements .................................................................................................. 105
13.1 Handles and manual controls ..............................................................................105
13.1.1 Adjustable controls .................................................................................. 105
13.2 Securing of parts .................................................................................................105
13.3 Provisions for external connections ..................................................................... 105
13.3.1 General ................................................................................................... 105
13.3.2 Connection to an a.c. mains supply ......................................................... 106
13.3.3 Wiring terminals for connection of external conductors ............................ 110
13.3.4 Supply wiring space.................................................................................111
13.3.5 Wire bending space for wires 10 mm
2
and greater ..................................112
13.3.6 Disconnection from supply sources.......................................................... 112
13.3.7 Connectors, plugs and sockets ................................................................112
13.3.8 Direct plug-in equipment.......................................................................... 113
13.4 Internal wiring and connections ........................................................................... 113
13.4.1 General ................................................................................................... 113
13.4.2 Routing....................................................................................................113
13.4.3 Colour coding .......................................................................................... 113
13.4.4 Splices and connections ..........................................................................114
13.4.5 Interconnections between parts of the PCE ............................................. 114
13.5 Openings in enclosures ....................................................................................... 114
