Note: the document extract you supplied is for IEC/TR 60736:1995 - "Testing equipment for electrical energy meters" - not IEC 60061-3 (lamp caps and gauges). Below is SEO-optimized content based on the provided IEC/TR 60736:1995 extract. If you instead want content for IEC 60061-3:1969/AMD40:2009, please provide that text or confirm and I will prepare a separate summary.
Overview
IEC/TR 60736:1995 provides guidance and technical recommendations for testing equipment for electrical energy meters (MTE) used in type and acceptance testing of single‑phase and three‑phase meters (Classes 0.5, 1 and 2). The report defines terminology, accuracy requirements, test procedures and laboratory practices needed to ensure reliable meter verification, calibration and type approval.
Key Topics
- Definitions and methods: Clear definitions for meter testing equipment (MTE), the wattmeter (power × time) method and the energy comparison (standard‑meter) method.
- Accuracy and error determination: Requirements for overall MTE error, permissible error limits by meter class, methods to determine errors (comparison with reference and working standards), and rules for applying corrections.
- Reference conditions: Specification of input/output reference conditions the MTE manufacturer must declare so meters under test receive appropriate voltage, current, frequency and waveform.
- Magnetic field limits: Recommended maximum magnetic flux density at meter locations (examples given for output currents such as 10 A and 200 A) and interpolation rules for intermediate values.
- Repeatability and statistical control: Procedures for repeated measurements at a control point, calculation of standard deviation limits, and acceptance criteria for new and in‑service MTEs.
- Testing procedure and ranges: Selection of voltage/current/power‑factor test points (basic and control measurements), number and sequence of tests for single‑ and three‑phase MTEs, and guidance on additional points to detect interference.
- Dielectric and safety properties: Requirements that MTEs retain insulation and dielectric qualities under normal service and humidity conditions; follow local safety regulations for insulation tests.
- Laboratory and bench guidance (Appendices A–C): Practical notes on lab environment, supply stability, meter test benches, wiring to minimize induction and capacitive interference, and initial checking of new equipment.
Applications
- Calibration and type‑testing of electricity meters by manufacturers and independent test labs
- Utility meter acceptance and quality control programs
- National metrology institutes and conformity assessment bodies performing meter verification
- Suppliers of meter testing equipment and calibration services
Related Standards
- Meter performance and classification standards (refer to IEC meter class documents)
- National regulations for electrical safety and insulation testing
- For complete, authoritative technical details and latest amendments, consult the IEC publications database or subscribe to the IEC standards service.
Open preview (PDF)Amendment 40 - Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 3: Gauges
