LVDC
LVDC
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Technical committeeTypeAcronymIEC TR 60904-14:2020CommitteePublished year2020KeywordsDescription
IEC TR 60904-14:2020 provides guidelines for measurements of the maximum power (Pmax) output of single-junction photovoltaic (PV) modules and for reporting at standard test conditions (STC) in industrial production line settings. As it is desirable to have consistent measurement practices across the industry, this document describes the following features of such measurements: - Essential elements, in order to provide common understanding; - Common issues or complications; - Sources of error and uncertainty, including recommendations to minimize them.
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Technical committeeTypeAcronymIEC 63202-1:2019CommitteePublished year2019Description
IEC 63202-1:2019 describes procedures for measuring the light-induced degradation (LID) of crystalline silicon photovoltaic (PV) cells in simulated sunlight. The magnitude of LID in a crystalline silicon PV cell is determined by comparing maximum output power at Standard Test Conditions (STC) before, and after, exposure to simulated sunlight at a specified temperature and irradiance. The purpose of this document is to provide standardized PV cell LID information to help PV module manufacturers in minimizing the mismatch between cells within the same module, thereby maximizing power yield.
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Technical committeeTypeAcronymIEC 62925:2016CommitteePublished year2016Description
IEC 62108:2016 defines a test sequence that will quickly uncover CPV module failures that have been associated with field exposure to thermal cycling for many years. This document was specifically developed to relate to thermal fatigue failure of the HCPV die-attach, however, it also applies, to some extent, to all thermal fatigue related failure mechanisms for the assemblies submitted to test.
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Technical committeeTypeAcronymIEC 62895:2017CommitteePublished year2017KeywordsDescription
IEC 62895:2017 specifies test methods and requirements for transmission power cable systems, cables with extruded insulation and their accessories for fixed land installations, for rated voltages up to and including 320 kV.
Within the scope of this standard “extruded insulation” means insulation manufactured by extrusion of either thermoplastic (e.g. polyethylene) or crosslinked (e.g. crosslinked polyethylene, ethylene propylene rubber, etc.) material. The insulation material may be either unfilled or filled (e.g. with mineral or carbon).
The requirements apply to single-core cables in combination with their accessories, outdoor and terminations for gas insulated systems, joints, and asymmetric joints for usual conditions of installation and operation, but not to special cables and their accessories, such as submarine cables, for which modifications to the standard tests may be necessary or special test conditions may need to be devised.Technology -
Technical committeeTypeAcronymIEC 62894:2014+AMD1:2016 CSVCommitteePublished year2016Description
IEC 62894:2014+A1:2016(E) describes data sheet and name plate information for photovoltaic inverters in grid parallel operation. The object of this standard is to provide minimum information required to configure a safe and optimal system with photovoltaic inverters. This consolidated version consists of the first edition (2014) and its amendment 1 (2016). Therefore, no need to order amendment in addition to this publication.
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Technical committeeTypeAcronymIEC 62852:2014+AMD1:2020 CSVCommitteePublished year2020KeywordsDescription
IEC 62852:2014+A1:2020 applies to connectors for use in the d.c. circuits of photovoltaic systems according to class II of IEC 61140:2001 with rated voltages up to 1 500 V d.c. and rated currents up to 125 A per contact. It applies to connectors without breaking capacity but which might be engaged and disengaged under voltage. This consolidated version consists of the first edition (2014) and its amendment 1 (2020). Therefore, no need to order amendment in addition to this publication.
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Technical committeeTypeAcronymIEC 62790:2020 RLVCommitteePublished year2020KeywordsDescription
IEC 62790:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 62790:2020 describes safety requirements, constructional requirements and tests for junction boxes up to 1 500 V DC for use on photovoltaic modules in accordance with class II of IEC 61140:2016. This document applies also to enclosures mounted on PV-modules containing electronic circuits for converting, controlling, monitoring or similar operations. Additional requirements concerning the relevant operations are applied under consideration of the environmental conditions of the PV-modules. This document does not apply to the electronic circuits of these devices, for which other IEC standards apply. This second edition cancels and replaces the first edition published in 2014. This edition includes the following significant technical changes with respect to the previous edition: - Modifications in normative references and terms and definitions; - Improvement of declaration of categories for junction boxes in 4.1; - Clarification for ambient temperature in 4.1; - Addition of requirement to provide information concerning RTE/RTI or TI in 4.2; - Reference to IEC 62930 instead of EN 50618 in 4.6; - Addition of "Functional insulation" in Table 1; - Addition of "Distance through cemented joints" in Table 3; - Correction of procedure of process to categorize material groups (deletion of PTI) in 4.15.2.3; - Requirement for approval of RTE/RTI or TI for insulation parts in 4.16.1 and 4.16.2; - Change of requirements concerning electrochemical potential in 4.17.2; - Clarification for IP-test in 5.3.4.2; - Addition of test voltage for cemented joints in 5.3.6 and 5.3.16; - Addition of detailled description on how to prepare the test sample for the thermal cycle test in 5.3.9.1; - New test procedure for bypass diode thermal test (5.3.18) in accordance with MQT 18.1 of IEC 61215-2:2016; - New test procedure for reverse overload current test in 5.3.23; - New Figure 1 for thermal cycle test.
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Technical committeeTypeAcronymIEC 62788-6-2:2020CommitteePublished year2020KeywordsDescription
IEC 62788-6-2:2020 provides methods for measuring the steady-state water vapour transmission rate (WVTR), water vapour permeability (P), diffusivity (D), solubility (S), and moisture breakthrough time (Ƭ10) (defined as the time to reach 10 % of the steady state WVTR) for polymeric materials such as encapsulants, edge seals, frontsheets and backsheets. These measurements can be made at selected temperatures and humidity levels as deemed appropriate for evaluation of their performance in PV modules. Measurement is accomplished by inspection of the transient WVTR curve and by fitting it to a theoretical Fickian model. This document is best applied to monolithic films. If multilayer films are used, the D and S values are only apparent values, but the steady-state values can still be measured.
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Technical committeeTypeAcronymIEC 62788-5-1:2020CommitteePublished year2020KeywordsDescription
IEC 62788-5-1:2020 provides procedures for standardized test methods for evaluating the properties of materials designed to be used as edge seals. When modules are constructed with impermeable (or extremely low permeability) front- and backsheets designed to protect moisture-sensitive photovoltaic (PV) materials, there is still the possibility for moisture to get in from the sides. The test methods described in this document are intended to be used to standardize the way edge seals are evaluated. Only some of these tests are applied for IEC 61215 and IEC 61730, and that status depends on the specific design.
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Technical committeeTypeAcronymIEC 62788-1-7:2020CommitteePublished year2020KeywordsDescription
IEC 62788-1-7:2020 is designed as a more rigorous qualification test, using accelerated UV exposure at elevated temperature to determine whether polymeric encapsulants can suffer loss of optical transmittance. IEC 61215-2 already includes a UV preconditioning test (MQT 10), however, the parameters for that test only represent a limited level of exposure (~weeks of UV dose). This test procedure is intended for representative coupon specimens, applying stress at a greater intensity (designed relative to Phoenix, AZ), using a radiation spectrum that is more similar to the terrestrial solar spectrum, and using a duration of exposure that is more relevant to the PV application (i.e., equivalent to several years of outdoor exposure). This test quantifies the degradation rate of encapsulants so that the risk of the materials losing optical transmittance during operation in the terrestrial environments can be managed. The quantitative correlation between climate (or location of use), a specific application (utility installation, residential-installation, roof-mount, rack-mount, use of a tracker, the system electrical configuration and its operation), and the test can be established for each specific encapsulant material, but is beyond the scope of this document.
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