BS EN 61643-11-2012 pdf download.Low-voltage surge protective devices Part 11: Surge protective devices connected to low-voltage power systems — Requirements and test methods.
ci) Temporary overvoltage rating UT and/or the type(s) of power system(s) the SPD is designed for according to Annex B and corresponding connection details
c2) Total discharge current ITotal for multipole SPDs (if declared by the manufacturer) and the corresponding test class
c3) Voltage drop for two port SPDs
c4) Load-side surge withstand capability for two-port SPDs (if declared by the manufacturer)
c5) Information about replaceable parts (indicators, fuses, etc. if applicable)
c6) Voltage rate of rise du/dt (if declared by the manufacturer)
c7) Current factor k. if different from Table 20
c8) Modes of protection (for SPDs with more than one mode of protection)
Information which shall be provided by the manufacturer for type testing:
di) Presence of switching component(s) (see Annex C)
d2) Follow current to be expected during preconditioning test (≤ 500 A or > 500 A – see Annex C)
d3) If the status indication circuitry does not use certified components operated within their ratings, the manufacturer shall provide the appropriate testing standards for the specific component to allow it to be tested.
d4) Isolation and dielectric withstand of separate isolated circuits d5) prospective short-circuit current for conditioning according 8.3.5.3.2
Compliance is checked by visual inspection
7.1.2 Marking
Markings on the device shall be indelible and legible and shall not be placed on screws or
removable parts.
NOTE A plug-in SPD module is not considered a removable part.
Compliance is checked by the test in accordance with 8.2.
7.2 Electrical requirements
7.2.1 Protection against direct contact
These requirements are valid for accessible SPDs where the maximum continuous operating voltage U is above 50 V r.m.s.
For protection against direct contact (inaccessibility of live parts). SPDs shall be designed in such a way that live parts cannot be touched when the SPD is installed for the intended use.
SPDs, except SPDs classified for mounting out-of-reach-only, shall be so designed that, when they are wired and mounted as for normal use, live parts are not accessible, even after removal of parts which can be removed without the use of a tool.
The connection between the earthing terminals and all accessible parts connected thereto shall be of low resistance
Compliance is checked by the tests according IEC 60529 and according 8.3.1.
7.2.2 Residual current IPE
For all SPDs with a terminal for the protective conductor, the residual current IPE shall be measured when all SPD terminals are connected to a power supply at the reference test voltage (UREF) according to the manufacturer’s instructions.
Compliance is checked by the test according 8.3.2
7.2.3 Voltage protection level Up
The measured limiting voltage of the SPDs shall not exceed the voltage protection level that is specified by the manufacturer.
Compliance is checked by the test in accordance with 8.3.3.
7.2.4 Operating duty
The SPD shall be capable of withstanding specified discharge currents during application of the maximum continuous operating voltage Uc without unacceptable changes in its characteristics.
Compliance is checked by the test in accordance with 8.3.4.
7.2.5 Disconnectors and status indicators
7.2.5.1 Disconnectors
The SPD shall have disconnectors (which can be either internal, external or both), except SPDs for connection N-PE in TN andlor TT systems only. Their operation shall be indicated by a corresponding status indicator.
The manufacturer shall provide information about the function of the indicator and the actions to be taken after change of status indication.
A status indicator may be composed of two parts (one of which is not replaced on replacement of the SPD), linked by a coupling mechanism which can be mechanical, optical, audio, electromagnetic, etc. The part of the status indicator which is not replaced shall be capable of operating at least 50 times.
NOTE The action of the coupling mechanism which operates the non-replaced pall of the status indicator may be simulated by means other than operation of the section within the replaced part of the SPD. e.g. a separate electromagnet or a spring
Where there is an appropriate standard for the type of indication used, this shall be met by the non-replaced part of the status indicator, with the exception that the indicator need only be tested for 50 operations.
7.2.6 Insulation resistance
The insulahon resistance of the SPD shall be sufficient with respect to leakage currents and protection against direct contact.
Compliance is checked by the test in accordance with 8.3.6.
7.2.7 Dielectric withstand
The dielectric withstand of the SPD shall be sufficient with respect to insulation breakdown and protection against direct contact.
Compliance is checked by the test in accordance with 8.3.7.
7.2.8 Behaviour under temporary overvoltages
An SPD shall pass the TOV-tests according 8.3.8.1 and 8.3.8.2 and shall fulfil the pass
criteria according to the relevant tables in Annex B and according 8.3.8,1 and 8.3.8.2.
NOTE I The tests given in 838.1 and 8.3.8.2 do not take into account the possibility of a surge occurring simultaneously with a TOV event.
SPD shall withstand the overvoltages caused by faults or disturbances in the high voltage system or fail in manner not creating a hazard.
SPDs, for which the manufacturer declares in his installation instructions that they may be installed in TT-systems between neutral and PE upstream the main RCD, shall pass the TOV withstand mode criteria given 8,3.8.2.BS EN 61643-11-2012 pdf download.