Functions and Features:

1. Bidirectional active energy measurement, reverse energy accumulated to positive energy.
2. New transfer credit accumulates to remaining credit. 20 digit number using the Standard Transfer Specification (STS) encryption techniques and protocol.
3. Precaution: When remaining credit crosses the minimum credit (20.00kWh), the warning LED glitter and buzzer buzzes (frequency 0.5Hz), and LCD also indicates the warning symbol to remind user to purchase credit.
4. Credit overflow limit: If the credit amount transferred plus remaining credit more than credit stock limit (1,000,000.00kWh), then the credit amount transferred will be refused, but the Credit amount transfer token is still valid.
5. Maximum power limit alarm: if users load exceeds the Maximum power limit, then the warning LED will glitter and buzzer buzzes (0.5Hz), and LCD also indicates warning symbol.
6. Tampering detection: if the terminal cover has been opened, the relay will automatically switch off, accompany with warning LED glitter, and the buzzer buzzing 0.5Hz) and LCD will indicate the tamper symbol. The relay will retain switch off status until a valid Clear Tamper Condition token being input.
7. LCD static display: Remaining credit
8. LCD manual display:
   Remaining credit
   Cumulative energy
   Urms
   Irms
   Power
   Meter Serial number