HT & LTCT Operated Meters
NABL accredited calibration of all high tension meters and LT current transformer operated meters — for industrial, utility and Open Access consumers across Andhra Pradesh and Telangana.
Scope of Calibration
All Types of HT Meters
High tension energy meters for 11 kV to 220 kV consumers
Transformer Operated HT Meters
CT and PT operated metering assemblies for high voltage installations
Class 0.2s HT Meters
Revenue-grade accuracy for large industrial and grid HT consumers
Class 0.5s HT Meters
Standard accuracy class for most HT metering points
All Types of LTCT Operated Meters
Low tension CT operated meters for commercial and industrial consumers
LTCT Class 0.5s Meters
Standard LTCT accuracy for commercial HT metering
LTCT Class 1 Meters
General purpose LTCT metering for industrial consumers
LTCT Class 2 Meters
Basic accuracy LTCT metering for smaller commercial loads
Service Details
- Location: Permanent Lab & On-site
- Voltage: 11 kV to 220 kV
- Classes: 0.2s, 0.5s, 1, 2
- Accepted by: APERC, TSERC, DISCOMs
Frequently Asked Questions
HT meters connect directly to high-tension (11 kV–220 kV) supply through instrument transformers, while LTCT meters use current transformers on the low-tension side to meter larger commercial and industrial loads without full HT infrastructure.
HT meter calibration covers 11 kV to 220 kV consumers, and LTCT meter calibration covers standard low-tension commercial and industrial connections.
HT meters are calibrated at Class 0.2s and 0.5s, and LTCT meters at Class 0.5s, 1 and 2, matching the accuracy requirements of each consumer category.