1-Phase & 3-Phase Energy Meters
NABL accredited calibration of single-phase and three-phase direct and transformer operated energy meters — all classes, as per IS 13779 and IS 14697 standards.
Scope of Calibration
1-Phase Direct Operated Meters
Single-phase energy meters connected directly to the supply circuit
3-Phase Direct Operated Meters
Three-phase LT energy meters for industrial and commercial consumers
1-Phase Transformer Operated Meters
Single-phase CT operated meters for HT service consumers
3-Phase Transformer Operated Meters
Three-phase CT operated meters — standard HT metering configuration
Class 0.2s Meters
Highest accuracy class for revenue-grade and grid metering applications
Class 0.5s Meters
Standard accuracy for HT industrial and Open Access consumers
Class 1 Meters
General commercial metering — shops, offices, small industry
Class 2 Meters
Basic residential and low-load commercial metering
Service Details
- Location: Permanent Lab & On-site
- Standards: IS 14697, IS 13779, IS 13010, IS 16444
- Classes: 0.2s, 0.5s, 1, 2
- Type: Direct & Transformer Operated
- Phases: 1-Phase & 3-Phase
Frequently Asked Questions
Direct-operated meters connect straight to the supply circuit and are used for lower current LT connections, while transformer-operated meters use current/potential transformers to step down high current or voltage for HT and large LT consumers.
Class 0.2s (revenue-grade), 0.5s (standard HT/Open Access), Class 1 (commercial) and Class 2 (basic residential/small commercial) meters are all calibrated.
1-phase and 3-phase meters are calibrated as per IS 13779 and IS 14697, covering both direct and transformer-operated configurations.