IS 13779
Electrical - AC static watt-hour meters, class 1 & 2
Summry
AC static watt-hour meters are electronic devices used to measure electrical energy consumption in alternating current (AC) circuits. They use solid-state components instead of mechanical parts, providing high accuracy, reliability, tamper resistance, and long service life. These meters are widely used in residential, commercial, and industrial installations.
Why BIS Certificate is Mandatory for AC static watt-hour meters, class 1 & 2 ?
BIS certification is mandatory for AC static watt-hour meters to ensure accurate energy measurement, consumer protection, and electrical safety. It prevents the use of inaccurate or tampered meters, ensures compliance with Indian Standards, supports fair billing practices, and is legally required for manufacturing, importing, and selling meters in India.
What is BIS Certified for AC static watt-hour meters, class 1 & 2?
BIS certification for AC static watt-hour meters confirms compliance with Indian Standards such as IS 16444 / IS 13779. It covers requirements related to accuracy class, electrical safety, endurance, environmental performance, tamper resistance, and testing. Certified meters carry the ISI mark, indicating approved quality and reliability.
Test required For AC static watt-hour meters, class 1 & 2
| Title | Mandatory/Optional |
|---|---|
| General and Constructional Requirements | Required |
| a.c. High Voltage Test | Required |
| Insulation Test | Required |
| Limits of Error Due to Variation of Current | Required |
| Test of Starting Condition | Required |
| Test of no-Load Condition | Required |
| Power Consumption | Required |
| Influence of Supply Voltage | Optional |
| Short Time Overcurrent Test | Optional |
| Influence of Self-Heating | Optional |
| Influence of Heating | Optional |
| Meter Constant | Required |
| Repeatability of Error Test | Optional |
| Clearances & Creepage Distances | Optional |
| Display of Measured Values | Required |
| Output Device | Required |
| Protection against penetration of dust and water | Optional |
| Immunity to Earth Fault (For 3 phase 4 wire meters) | Optional |
| Electromagnetic Compatibility | Optional |
| Accuracy Requirements (Limits of error due to other influence quantities) | Optional |
| Accuracy Requirements (Limits of error due to ambient temperature variation) | Optional |
| Shock Test | Optional |
| Vibration Test | Optional |
| Spring Hammer Test | Optional |
| Test for climatic influences | Optional |
| Impulse Voltage Test | Optional |
| Terminal Blocks and Terminal Cover | Optional |
| Resistance to Heat and Fire | Optional |
Benefits of BIS Certification for AC static watt-hour meters, class 1 & 2
1. Accurate Energy Measurement BIS-certified meters meet strict accuracy class requirements, ensuring correct electricity billing and preventing financial losses for consumers and utilities.
2. Electrical Safety Assurance Certification ensures compliance with safety standards, reducing risks of electric shock, fire hazards, and equipment failure during long-term use.
3. Tamper Resistance and Reliability BIS standards include anti-tampering features and endurance testing, making meters reliable and secure against manipulation or unauthorized interference.
4. Legal and Regulatory Compliance BIS certification is compulsory in India, allowing manufacturers and importers to legally supply meters to utilities without penalties or rejection.
5. Trust and Market Acceptance The ISI mark builds trust among electricity boards, government agencies, and consumers, enhancing brand credibility and increasing acceptance in public and private tenders.