Automatic Synchroniser: NPRG860 / NPRG870
Successors to the RG86C/RG87B (part of the TECHNIREL range), the NPRG860 and NPRG870 carry out the paralleling of generators or Busbars on a network. 
Paralleling is initiated when all conditions are satisfied (frequency slip, voltage angle, ...) 
ANSI function codes: 90/25 

Both the NPRG860 and NPRG870 perform the following functions:
  • Measurement of the circuit breaker closing time (TA) 
  • "Dead Bus" function 
  • Frequency matching ± F
The NPRG870 has additional functions:
  • Voltage matching ± U 
  • Multi-group management function (up to 4 generators). 
These relays are part of the NP800 range, offering multi-function protection and communication via Modbus (RS485) or Modbus TCP (Ethernet).  A full brochure is available on the NP800 range page