Electronic Single-Phase Prepayment Kilowatt Hour Meter (DDSY2188)

1. Long-term active energy measurement without any calibration.
2. LCD / LED display.
3. Employ high-capacity magnetism-reserved relays with high reliability and low power consumption. 4. Prepay expenses by IC card, purchase first, consume second.
5. Trip and cut off power so as to remind the user of purchase in time when the residual energy reaches alarm value.
6. Data write-back function: When IC card is inserted into the slot, purchased electric quantity and parameters are inputted into the KHM while the corresponding parameters in the KHM are written back into IC card, which could be read out accurately by electricity sales system.
7. Anti-tamper function, recording the non-normal consumption information.
8. Peak load control function, setting up the peak load discretionarily.
9. Automatically turn off power as well as memorize the frequency once overloaded.
10. Internal data saves itself as blackout to ensure the memory period of at least 10 years.
11. Unique card for each user, fraud proof.