This standard defines static watt-hour meters with accuracy classes 0.2 S, 0.5 S, and 1 S, alongside var-hour meters with accuracy classes of 0.2 S, 0.5 S, and 1 S. These meters are designed for measuring alternating current electrical active and reactive energy across frequencies spanning from 45 Hz to 55 Hz. They cater to both single-phase and three-phase balanced and unbalanced loads.

This standard exclusively pertains to transformer-operated static watt-hour meters featuring enclosed measuring elements and registers within the meter case. It also covers operation indicators and test outputs. Additionally, it extends to meters equipped with multiple rate tariffs and those capable of measuring energy in both forward and reverse directions.

Certain static reactive energy (var-hour) meters may fall under the purview of this standard, treated akin to active energy (watt-hour) meters with the requisite power factor adjustment. Ideally, maintaining identical accuracy classes for both active and reactive energies in a meter is preferred. Nonetheless, this standard permits the reactive energy accuracy class to be one level lower than that of the active energy.

This does not apply to the following:

• Watt-hour and var-hour meters designed for systems where the voltage across the connection terminal surpasses 600 V (line-to-line voltage for meters in polyphase systems).

• Portable and outdoor meters

• Data interfaces to the meter register.

• The mechanical requirements for rack-mounted meters are not covered by this standard.

Meters are categorized according to their specific class indices, such as 0.2 S or 0.5 S.

Meters must be meticulously crafted to eliminate any potential hazards during regular use and under typical conditions, prioritizing personal safety against electric shock, overheating, and fire. Additionally, the meter casing should be sealable, restricting access to internal components until the seal is broken.

TESTS

The specified tests must be conducted.

• General and Constructional Requirements

• a.c. High Voltage Test

• Insulation Test

• Accuracy Requirements (Limits of Error)

• Test of starting condition

• Test of no-load condition

• Power Consumption

MARKING

Marking must adhere to the specifications outlined in IS 14697:2021. AC static watt-hour meters may also bear the standard mark (ISI Mark). Manufacturers are required to obtain a BIS license from the Bureau of Indian Standards to utilize the standard mark (ISI Mark). This license is granted following a comprehensive assessment of manufacturing infrastructure, production processes, and testing capabilities conducted during an on-site visit to the manufacturing premises by the Bureau.

PROCESS FOR BIS ISI MARK CERTIFICATION

BIS CERTIFICATION PROCESS

Acquiring a BIS license requires a comprehensive review of manufacturing infrastructure, quality control abilities, testing resources, and production procedures. This thorough assessment guarantees that products not only adhere to regulations but also prioritize consumer safety and reliability.

NOTE:

For comprehensive guidance on the BIS ISI Certification process, please explore:

• Procedure for Domestic Manufacturers

• Procedure for Foreign Manufacturers

WHY USE ABSOLUTE VERITAS?

Absolute Veritas is a prominent organisation from the private sector of India primarily dealing with the Inspection, Testing, Audits, Certification of products& consulting services to various industries in India and worldwide, ensuring compliance with regulatory standards and industry requirements. Offering a comprehensive range of services including product certification, testing, training, auditing, and compliance services, Absolute Veritas helps manufacturers and importers achieve higher production efficiency and quality standards.

Absolute Veritas (AV) will handle end to end pre-registration request, sample preparation, documentation, testing and application process for FMCS Certification

For any questions regarding the most recent update on FMCS registration licenses, please reach out to us via email at cs@absoluteveritas.com