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PD CISPR TR 30 — Test Method on Electromagnetic Emissions (Part 1 Electronic Control Gear for Fluorescent Lamps; Part 2 for Discharge Lamps Excluding Fluorescent)
Test Method on Electromagnetic Emissions — Electronic Control Gear for Fluorescent Lamps / for Discharge Lamps Excluding Fluorescent Lamps
💡 PD CISPR/TR 30 is a series of Published Documents issued by the British Standards Institution (BSI) based on the International Electrotechnical Commission (IEC) International Special Committee on Radio Interference (CISPR) technical report CISPR/TR 30, concerning test methods on electromagnetic emissions. Electronic control gear for lighting (commonly called “electronic ballasts / LED drivers”) produces conducted and radiated emissions while operating, which can interfere with other electronic equipment. The two parts in this batch, PD CISPR/TR 30-1:2012 (electronic control gear for fluorescent lamps) and PD CISPR/TR 30-2:2012 (electronic control gear for discharge lamps excluding fluorescent lamps), specify test methods for measuring electromagnetic emissions under “reference luminaire” conditions for two categories of lighting products.
💡 Electromagnetic emission is an important aspect of the electromagnetic compatibility (EMC) performance of electronic equipment. Luminaires and their control gear are among the most numerous electrical devices in homes, offices and commercial premises; their emission characteristics directly affect grid harmonics and radio-frequency interference, so unified, repeatable test methods are needed for assessment.
1. Overview of the Series 📌
CISPR/TR 30 is prepared by the IEC CISPR technical committee (the UK participates through Subcommittee GEL/210/11, EMC product standards) and published as a technical report; it is a “test method” type document. The two parts in this batch are summarised below:
| Standard | Product Scope | Main Test Content | Year |
|---|---|---|---|
| PD CISPR/TR 30-1:2012 | Electronic control gear for single- and double-capped fluorescent lamps | Electromagnetic emission test method under reference luminaire conditions and presumption of compliance | 2012 |
| PD CISPR/TR 30-2:2012 | Electronic control gear for discharge lamps excluding fluorescent lamps | Emission test method under reference luminaire (Class I/II) conditions and presumption of compliance | 2012 |
⚠️ A technical report (TR) differs from a formal standard; its content is largely informative, providing explanation and guidance on test methods. Formal compliance determination normally follows the relevant product standard or a generic EMC standard; when citing this report, its informative status should be made clear.
2. Core of the Test Method — Reference Luminaire 🔬
The electromagnetic emission of a luminaire depends not only on the electronic control gear itself, but also on the lamp/source, wiring layout, earthing method and luminaire construction. In order to assess the emission characteristics of control gear under “unified, comparable” conditions, CISPR/TR 30 uses the reference luminaire method:
- Reference luminaire construction: the standard specifies a unified reference luminaire structure, dimensions and materials as the mounting carrier for the control gear under test;
- Mounting and wiring schemes: it specifies the mounting and wiring arrangements of lamps, control gear and conductors in the reference luminaire (including two-sided supply wiring), with figures;
- Grounding: it specifies the earthing arrangement of the reference luminaire (e.g., earthed/non-earthed) to control the effect of the earth return on emission measurement;
- Wiring: it specifies the routing and lengths of supply, control and lamp conductors within the reference luminaire to ensure measurement consistency.
By measuring the emission of the whole “control gear + reference luminaire + specified wiring” as a single assembly, the uncertainty introduced by luminaire construction differences is largely eliminated, making different brands and models of control gear comparable.
✅ The reference luminaire method is the technical core of this series: it extends the “device under test” from the control gear alone to “control gear installed in a standardised luminaire” — the actual use condition — which is both realistic and repeatable/comparable.
3. Part 1: Electronic Control Gear for Fluorescent Lamps 🏷️
PD CISPR/TR 30-1:2012 covers electronic control gear for single- and double-capped fluorescent lamps. Its content includes: scope and references, presumption of compliance, test method, reference luminaire construction, mounting and wiring schemes, grounding, wiring, marking, and guidance for luminaire design, with figures for the reference luminaire mounting and wiring schemes.
“Presumption of compliance” means that when certain conditions are met (e.g., control gear type, power range, luminaire configuration), the product may be presumed to meet the corresponding emission limits, reducing unnecessary testing. The part also gives guidance for luminaire design, helping manufacturers consider emission control (filtering, shielding, wiring optimisation) at the design stage.
⚠️ Marking and design guidance are easily overlooked but important: product marking should facilitate identification of type and field of application; the luminaire design guidance helps fixture manufacturers avoid emission non-conformance at the design stage, preventing “fails after assembly” rework.
4. Part 2: Electronic Control Gear for Discharge Lamps (Excluding Fluorescent) 🏷️
PD CISPR/TR 30-2:2012 covers electronic control gear for discharge lamps other than fluorescent lamps (e.g., high-pressure sodium, metal-halide and other high-intensity discharge lamps). Its structure is similar to Part 1, but specifies the appropriate reference luminaire mounting and wiring schemes for discharge lamps, and in particular gives Class I and Class II reference luminaire (e.g., for discharge lamps up to and including 150 W) mounting and wiring schematics.
Discharge lamp control gear is typically higher power and operates at higher voltage; its emission characteristics differ from fluorescent control gear, so a separate test method and reference luminaire configuration are needed.
💡 Class I (with protective earth) and Class II (double/ reinforced insulation) equipment differ in earthing and insulation structure, and their emission measurements may differ. The standard gives separate reference configurations so both categories can be measured under representative conditions.
5. Key Technical Requirements 📋
Combining the two parts, the key requirements for electromagnetic emission testing include:
- Unified reference luminaire: construction, materials, dimensions and wiring per the standard, avoiding luminaire differences introducing measurement error;
- Specified measurement layout: test site, antenna/probe positions, absorbing clamp and supply impedance per the relevant EMC standard;
- Presumption-of-compliance conditions: where specified conditions are met, a presumption may be used, reducing test effort;
- Marking and traceability: product marking facilitates identification of type and scope, supporting conformity assessment and traceability;
- Design guidance application: fixture manufacturers apply emission-control guidance at the design stage to control emissions at source.
6. Engineering Practice and Applications 🛠️
This series is widely applied in the lighting and electrical industry:
- Control gear development and verification: assess the emission performance of new electronic ballasts/drivers under reference luminaire conditions;
- Fixture design and certification: luminaire manufacturers apply design guidance to optimise structure, wiring and filtering so the fixture meets EMC requirements;
- Quality sampling and type testing: testing bodies measure emissions by the unified method for comparable results;
- Troubleshooting: locate causes of emission non-conformance (wiring, earthing, filter components) using the standardised measurement layout.
⚠️ Common root causes of fixture emission non-conformance include: improperly arranged filter inductor/capacitor, lamp and supply conductors routed parallel and too long, poor earth return, and incomplete enclosure shielding. The reference luminaire method helps systematically investigate these factors.
7. Frequently Asked Questions ❓
❓ Q: Why are electromagnetic emission tests carried out in a “reference luminaire”?
A: A fixture’s actual emission is strongly influenced by the lamp, wiring, earthing and construction. Installing the control gear under test in a unified reference luminaire eliminates luminaire differences, making results from different products repeatable and comparable, while remaining close to real use conditions.
A: A fixture’s actual emission is strongly influenced by the lamp, wiring, earthing and construction. Installing the control gear under test in a unified reference luminaire eliminates luminaire differences, making results from different products repeatable and comparable, while remaining close to real use conditions.
❓ Q: CISPR/TR 30 is a technical report — is it mandatory?
A: A technical report is largely informative and not itself mandatory. Its value lies in providing a unified test method and design guidance; formal compliance determination normally follows the relevant product standard or generic EMC standard (e.g., EN 55015, CISPR 15).
A: A technical report is largely informative and not itself mandatory. Its value lies in providing a unified test method and design guidance; formal compliance determination normally follows the relevant product standard or generic EMC standard (e.g., EN 55015, CISPR 15).
❓ Q: What is the difference between Parts 1 and 2?
A: Part 1 is for electronic control gear for fluorescent lamps; Part 2 for electronic control gear for discharge lamps excluding fluorescent (e.g., high-pressure sodium, metal-halide). Because the sources and operating voltages differ, the reference luminaire configurations and test details differ.
A: Part 1 is for electronic control gear for fluorescent lamps; Part 2 for electronic control gear for discharge lamps excluding fluorescent (e.g., high-pressure sodium, metal-halide). Because the sources and operating voltages differ, the reference luminaire configurations and test details differ.
❓ Q: What is “presumption of compliance”?
A: When specified conditions are met (e.g., product type, power range, luminaire configuration), the product may be presumed to meet the corresponding emission limits, avoiding or reducing testing — an engineering-based simplified conformity assessment route.
A: When specified conditions are met (e.g., product type, power range, luminaire configuration), the product may be presumed to meet the corresponding emission limits, avoiding or reducing testing — an engineering-based simplified conformity assessment route.
❓ Q: What is the role of the luminaire design guidance?
A: It guides fixture manufacturers to control emissions at the design stage through filtering, shielding and wiring optimisation, reducing the risk of “emission non-conformance after assembly” and the associated rework cost.
A: It guides fixture manufacturers to control emissions at the design stage through filtering, shielding and wiring optimisation, reducing the risk of “emission non-conformance after assembly” and the associated rework cost.