L&T HT Energy Meter

L&T HT (High Tension) Energy Meters—notably the ER300P and associated ABT (Availability Based Tariff) and trivector models—are advanced digital multi-function meters designed for accurate, secure, and comprehensive billing and monitoring in high-voltage (HT) applications such as industrial, utility, and open access/solar installations.

Key Features & Specifications

• Accuracy Classes: 0.2s, 0.5s, 1.0 (as per IS 14697 & IS 15959)

• Type: CT or CT/PT operated, supporting typical HT metering setups

• Voltage: Suitable for high-voltage applications (33kV, 11kV, etc. through external CT/PT sets)

• Current Rating: Standard 1A/5A secondary (from CTs), 10A max

• Measurement: True four-quadrant metering—kWh, kVAh, kVArh (import & export), maximum demand (MD), instantaneous V/A/PF/frequency, block energy values and frequency measurements

• Display: Large LCD with scroll/auto/manual modes; battery-powered viewing during power outages

• Communication: Supports optical, RS232, RS485, IR/RF/IrDA (model dependent) with DLMS/IEC protocols; AMR/AMI ready

• Data Logging: Load surveys/block profiles (up to 90 days); 15-minute block storage as per ABT/open access requirements; last 12 months billing profile

• Tariff & Demand: Multi-tariff/ToD configuration, MD registers, programmable seasons and profiles

• Tamper & Security: Extensive anti-tamper features—records current reversal, cover opening, voltage abnormalities, CT/PT open/mismatch, magnetic influence, and more

• Event Logging: Tamper events, abnormal conditions, power loss, battery status, etc.; data not lost on power failure (NVM: 10+ years retention)

• Other Features: Factory-set unidirectional/bi-directional operation (solar net metering), polycarbonate enclosure options with sealing, compliance to all major Indian utility requirements

Popular L&T HT Models

• ER300P: ABT, open access, and inter-utility billing compliant

• Trivector Meter Series: Multi-parameter, four-quadrant, CT/PT operated (Class 0.2s/0.5s/1.0)

• Custom ABT Meters: For PGCIL/Open Access/SEBs (compatible with NPC data formats)