Item No.: CO3301-5W

Multi-function relay, power controller, cos-phi controller, synchronizing unit

The multi-function relay has been designed for the control, protection and monitoring of generators. The settings and parameters may be set using a membrane keyboard on the front panel or with a PC. Remote control via interface and discrete/analog inputs for adjusting speed, frequency, voltage, power, reactive power, and power factor set points. This unit complies with all currently applicable guidelines.

Control functions:

  • Automatic synchronisation
  • Automatic power control
  • Automatic power factor control
  • Automatic voltage control
  • Automatic frequency control
  • Automatic active and reactive power distribution
  • Operating data acquisition

Protective and monitoring functions:

  • Generator: voltage/frequency (ANSI 59 / 27 / 81O / 81U)
  • Generator: overload, reverse/reduced power (ANSI 32 / 32R / 32F)
  • Generator: unbalanced load (ANSI 46)
  • Generator: instantaneous overcurrent (ANSI 50)
  • Generator: time-overcurrent (ANSI 51)
  • Generator: ground fault (ANSI 50G)
  • Generator: power factor (ANSI 55)
  • Generator: rotation field
  • Generator set: speed/frequency mismatch
  • Grid: voltage/frequency/phase shift/ROCOF (ANSI 59/27/81O/81U/78)
  • Grid: rotation field

Technical data:

  • Measuring voltage: 380...440 V/AC
  • Measuring frequency: 40....85 Hz
  • Measuring current: 2.5 A
  • Outputs: Relay manager with 3 floating relays
    Synchronising output LS-on
    Synchronising output LS-off
  • Inputs: Circuit-breaker (LS) acknowledgment signaling
  • Displays: 2 LED – Alarm, Stop
    red lamp – Circuit-breaker (LS) on
    128×64 dot graphical interactive LC display with soft keys
  • Interface: USB
  • Motor protection switch, 1 - 1.6A  
  • Measuring inputs: 4-mm safety sockets
  • Dimensions: 297 x 456 x 200 mm (HxWxD)
  • Weight: 2.7 kg