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BS EN IEC 63052:2021

BS EN IEC 63052:2021

$215.11

Power frequency overvoltage protective devices (POPs) for household and similar applications

Published By Publication Date Number of Pages
BSI 2021 126
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This document applies to devices for power frequency overvoltage protection (hereafter referred to as “POP”) for household and similar uses, with a rated frequency of 50 Hz, 60 Hz or 50/60 Hz, with rated voltage not exceeding 230 V AC (between phase and neutral), and with rated current not exceeding 63 A, either consisting of a functional unit in combination with a main protective device (MPD), or as one single device having opening means able to open the protected circuit in specified conditions.

The main protective device is a circuit-breaker, an RCCB or an RCBO.

NOTE 1 A POP, as one single device, is not a protective device to be used for automatic disconnection of the supply within the meaning specified in IEC 60364-4-41.

POPs are intended for use in an environment with pollution degree 2 and overvoltage category III. Devices for POPs are suitable for isolation.

POPs can be designed as a POP unit assembled to or integrated in a main protective device by the manufacturer or as an assembly of a main protective device mechanically or electrically coupled on site with the POP unit, or as one single POP having opening means able to open the protected circuit in specified conditions.

POPs are intended to mitigate the effects of power frequency overvoltages between a phase and neutral conductor (e.g. caused by loss of a neutral conductor in the three-phase supply upstream of the POP) for downstream equipment by opening the protected circuit when an overvoltage between phase and neutral is detected.

NOTE 2 In this context, the verb “mitigate” means that the POP will provide protection in most cases of power frequency overvoltages.

POPs intended for monitoring one line-to-neutral conductor voltage can be used between two-phase conductors in a phase-to-phase electrical supply system not exceeding 230 V if both conductors are switched and declared as such by the manufacturer.

POPs according to this document are suitable for use in an IT system provided all active conductors are switched.

This document does not apply to protection against common mode overvoltages.

This document does not apply to surge protective devices.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
11 Annex ZZ (informative)Relationship between this European standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered
13 English
CONTENTS
19 FOREWORD
21 1 Scope
2 Normative references
23 3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
25 3.2 Abbreviated terms
26 4 Classification
4.1 According to the method of construction
4.2 According to the number of monitored line-to-neutral conductor voltages
4.3 According to the method of mounting
5 Characteristics of POPs
5.1 Summary of characteristics
27 5.2 Rated quantities and other characteristics
5.2.1 Rated voltage
5.2.2 Rated current (In)
5.2.3 Rated frequency
5.2.4 Rated making and breaking capacity (Im)
5.2.5 Rated making and breaking capacity on one pole (Im1)
5.3 Standard and preferred values
5.3.1 Preferred values of rated voltage (Un)
28 5.3.2 Preferred values of rated current (In)
5.3.3 Preferred values of rated frequency
5.3.4 Minimum value of the rated making and breaking capacity (Im)
5.3.5 Minimum value of the rated making and breaking capacity on one pole (Im1)
5.3.6 Standard and preferred values of the rated conditional short-circuit current (Inc) and standard and preferred values of the rated conditional short-circuit current for one pole (Inc1)
29 5.3.7 Limit values of the break times and non-actuating times
5.3.8 Standard value of rated impulse withstand voltage (Uimp)
5.4 Coordination with short-circuit protective devices (SCPDs)
5.4.1 General
Tables
Table 1 – Limit values of break times and non-actuating times
Table 2 – Rated impulse withstand voltage as a function of the nominal voltage of the installation
30 5.4.2 Rated conditional short-circuit current (Inc) and rated conditional short-circuit on one pole (Inc1)
5.4.3 Operating characteristics of opening means for POPs according to 4.1.4
6 Marking and other product information
6.1 Marking
31 Table 3 – Marking and position of marking
33 6.2 Additional marking for POPs according to 4.1.4
6.2.1 Marking of POPs
6.2.2 Instructions for wiring and operation
7 Standard conditions for operation in service and for installation
7.1 Standard conditions
34 7.2 Conditions of installation
7.3 Pollution degree
8 Requirements for construction and operation
8.1 General
Table 4 – Standard conditions for operation in service
35 8.2 Mechanical design
8.2.1 General
36 8.2.2 Mechanism
37 8.2.3 Clearances and creepage distances
38 Table 5 – Minimum clearances and creepage distances
40 8.2.4 Screws, current-carrying parts and connections
41 8.2.5 Terminals for external conductors
42 Table 6 – Connectable cross-sections of copper conductors for screw-type terminals
43 8.3 Protection against electric shock
44 8.4 Dielectric properties and isolating capability
8.5 Temperature-rise
8.5.1 Temperature-rise limits
Table 7 – Temperature-rise values
45 8.5.2 Ambient air temperature
8.6 Operating characteristics
8.6.1 Operating characteristics of the MPD part
8.6.2 Operating characteristics of the POP
8.7 Mechanical and electrical endurance
46 8.8 Performance at short-circuit currents
8.9 Resistance to mechanical shock and impact
8.10 Resistance to heat
8.11 Resistance to abnormal heat and to fire
8.12 Safety performance of overstressed POPs
8.13 Behaviour of POPs in case of current surges caused by impulse voltages
8.14 Reliability
8.15 Electromagnetic compatibility (EMC)
47 9 Testing procedure
9.1 General
9.1.1 General testing procedure for the different type of POPs
48 9.1.2 Characteristics of POPs are checked by means of type tests
49 9.1.3 For certification purposes, type tests are carried out in test sequences
9.2 Test conditions
Table 8 – List of type tests
50 9.3 Test of indelibility of marking
9.4 Test of reliability of screws, current-carrying parts and connections
Table 9 – Test copper conductors corresponding to the rated currents
51 Table 10 – Screw thread diameters and applied torques
52 9.5 Test of reliability of terminals for external conductors
Table 11 – Pulling forces
53 9.6 Verification of protection against electric shock
9.7 Test of dielectric properties
9.7.1 Resistance to humidity
54 9.7.2 Insulation resistance of the main circuit
55 9.7.3 Dielectric strength of the main circuit
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits
56 9.7.5 Capability of control circuits connected to the main circuit withstanding high DC voltages due to insulation measurements
Table 12 – Test voltage of auxiliary circuits
57 9.7.6 Verification of impulse withstand voltages and of leakage current across open contacts
58 Table 13 – Test voltage for verification of impulse withstand voltage
59 9.8 Test of temperature-rise
9.8.1 Ambient air temperature
9.8.2 Test procedure
Table 14 – Test voltage for verifying the suitability for isolation, in reference to the rated impulse withstand voltage of the POP and the altitude at which the test is carried out
60 9.8.3 Measurement of the temperature of parts
9.8.4 Temperature-rise of a part
9.9 Verification of the operating characteristics
9.9.1 Test circuit
9.9.2 Off-load characteristic tests with sinusoidal alternating voltages at the reference temperature of 20 °C ± 5 °C
61 9.9.3 Test of the effect of the ambient air temperature on the operating characteristics
9.10 Verification of mechanical and electrical endurance
9.10.1 General test conditions
9.10.2 Test procedure
62 9.10.3 Additional test for POP according to 4.1.4
9.10.4 Condition of the POP after the test
63 9.11 Verification of the behaviour of the POP under short-circuit conditions
9.11.1 General
9.11.2 Short-circuit tests for POPs according to 4.1.4
Table 15 – Tests to be made to verify the behaviour of POPs under short-circuit conditions
65 Table 16 – Minimum values of l2t and lp
66 Table 17 – Power factors for short-circuit tests
70 9.12 Verification of resistance to mechanical shock and impact
9.12.1 Mechanical shock
71 9.12.2 Mechanical impact
73 9.13 Test of resistance to heat
9.13.1 Test on complete product
74 9.13.2 Ball pressure test
75 9.14 Test of resistance to abnormal heat and to fire
76 9.15 Test of safety performance of overstressed POPs
9.16 Verification of behaviour of POPs in case of current surges caused by impulse voltages
9.16.1 General
77 9.16.2 Verification of behaviour at surge currents up to 3 000 A (8/20 µs surge current test)
9.17 Verification of ageing of electronic components
78 9.18 Electromagnetic compatibility (EMC)
9.18.1 General
9.18.2 EMC tests covered by other clauses/subclauses of the present document
9.18.3 EMC tests to be performed
Table 18 – Tests already covered in this document
79 Table 19 – Tests to be applied for EMC
80 9.18.4 POPs performance criteria
81 9.18.5 Emission tests
Table 20 – Emission test conditions
82 9.19 Tests of creepage distances and clearances for electronic circuits (abnormal conditions)
9.19.1 General
9.19.2 Abnormal conditions
9.19.3 Test procedure
83 Table 21 – Maximum permissible temperatures under abnormal conditions
84 9.20 Requirements for capacitors and specific resistors and inductors used in electronic circuits
9.20.1 General
9.20.2 Capacitors
85 9.20.3 Resistors
9.20.4 Inductors and windings
Figures
Figure 1 – Thread forming tapping screw
Figure 2 – Thread cutting tapping screw
86 Figure 3 – Standard test finger (see 9.6)
87 Figure 4 – Typical diagram for all short circuit tests except for the verification of the suitability in IT systems
88 Figure 5 – Typical diagram for the verification of the suitability in IT systems
Figure 6 – Detail of impedance Z, Z1 and Z2 in Figure 4 and Figure 5
90 Figure 7 – Example of calibration record for short-circuit test (see 9.11.2.2 j))
91 Figure 8 – Mechanical shock test apparatus (see 9.12.1)
92 Figure 9 – Mechanical impact test apparatus (see 9.12.2)
93 Figure 10 – Striking element for pendulum impact test apparatus (see 9.12.2)
94 Figure 11 – Mounting support for sample for mechanical impact test (see 9.12.2)
95 Figure 12 – Example of mounting of unenclosed POPs for mechanical impact test (see 9.12.2)
96 Figure 13 – Example of mounting of panel mounting type POPs for mechanical impact test (see 9.12.2)
97 Figure 14 – Application of force for mechanical testof rail mounted POPs (see 9.12.2)
Figure 15 – Ball-pressure test apparatus (see 9.13.2)
98 Figure 16 – Surge current impulse 8/20 µs
Figure 17 – Test circuit for the surge current test
99 Figure 18 – Example of test circuit for verification of ageingof electronic components (see 9.17)
100 Figure 19 – Minimum creepage distances and clearances measured in millimetres
101 Figure 20 – Minimum creepage distances and clearances as a function of peak value of operating voltage
102 Annexes
Annex A (normative) Test sequences and number of samples to be submitted for certification purposes
A.1 Test sequences
103 Table A.1 – Test sequences for POPs classified according to 4.1.1
104 Table A.2 – Test sequences for POPs classified according to 4.1.2
105 Table A.3 – Test sequences for POPs classified according to 4.1.3
106 Table A.4 – Test sequences for POPs classified according to 4.1.4
107 A.2 Number of samples to be submitted for full test procedure
A.3 Number of samples to be submitted for simplified test proceduresin case of simultaneous submission of a range of POPs of the same fundamental design
Table A.5 – Number of samples for full test procedure
108 Table A.6 – Number of samples for simplified test procedure
109 Annex B (normative) Determination of clearances and creepage distances
B.1 General
B.2 Orientation and location of a creepage distance
B.3 Creepage distances where more than one material is used
B.4 Creepage distances split by floating conductive part
B.5 Measurement of creepage distances and clearances
113 Annex C (normative) Arrangement for the detection of the emission of ionized gases during short-circuit tests
114 Figure C.1 – Test arrangement
115 Figure C.2 – Grid
Figure C.3 – Grid circuit
116 Annex D (informative) Methods of determination of short-circuit power factor
D.1 General
D.2 Method I – Determination from DC components
D.3 Method II – Determination with pilot generator
117 Annex E (informative) Examples of terminal designs
Figure E.1 – Examples of pillar terminals
118 Figure E.2 – Examples of screw terminals and stud terminals
119 Figure E.3 – Examples of saddle terminals
Figure E.4 – Examples of lug terminals
120 Annex F (informative) Correspondence between ISO and AWG copper conductors
Table F.1 – ISO and AWG copper conductor correspondence
121 Annex G (informative) SCPDs for short-circuit tests
G.1 General
G.2 Silver wires
G.3 Declared protective devices
Table G.1 – Indication of silver wire diameters as a function of rated currents and short-circuit currents
122 G.4 Other means
Figure G.1 – Test apparatus for the verification ofthe minimum I2t and Ip values to be withstood by the POP
123 Annex H (informative) POP configurations according to classification in 4.1
Figure H.1 – POP according to classification in 4.1
124 Bibliography

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BS EN IEC 63052:2021
$215.11