Automatic electric ltd. Is engaged in manufacturing electrical instruments, power systems and instrument transformers in india. The company has been accredited with an iso 9001 certification. Power line monitor plm - series uses an advanced microcontroller, which samples voltage & current signals and computes true rms voltage, current, power factor, powers and energies. It is used as a sub-meter for energy management. It is available as a stand - alone unit for manual monitoring. It can also be used with scada system through rs 485 port. The following are its salient features:
1. indication of instantaneous parameters.
2. programmable ctr / ptr
3. password facility to change settings.
4. data retention for 10 years.
5. optically isolated rs232c with modbus rtu protocol.
6. optically isolated rs 4s5 output through an external module msc 485 with modbus rtu protocol.
7. maximum demand for kwh, kvarh, kvah using sliding window technique.
8. 56k bytes of backup memory.
9. real time clock & calendar.
10. power line monitor is a1 ph / 3 ph - 2 el - 3w / 3 ph - 3 el - 4w
