ABB REF542PLUS Bay Control and Protection Unit

Technical Data and Measurements

Quantity Class Range:

• Phase Current, Earth Current: 0.5, 0.1-4 In
• Line Voltage, Phase Voltage: 0.5, 0.2-1.5 Vn
• Active, Reactive Energy: 2
• Active, Reactive, Apparent Power: 1
• Cosφ: 1, –1 to +1
• Frequency: 0.02, 40-75 Hz

Protection Functions and Operation Time:

• Protection Functions: Class 3
• Operation Time: Class 3 or minimum ±15 ms
• Rated Current (In): 0.2 A, 1 A, or 5 A
• Rated Voltage (Un): 100 V - 125 V
• Rated Frequency (fn): 50 Hz or 60 Hz

ANSI Code Protection Functions and Parameters:

• 68 Inrush Stabilization (only in connection with 50 and 51):

  • N: 2.0 to 8.0
  • M: 3.0 to 4.0
  • Time: 200 to 100,000 ms

• 68 Inrush Harmonic:

  • Min Current Threshold: 0.05 to 40.00 x In
  • Fault Current Threshold: 0.05 to 40.00 x In
  • Harmonic Ratio Threshold: 5% to 50%

• 50 Overcurrent Instantaneous:

  • I>>>: 0.100 to 40.000 x In
  • t: 15 to 30,000 ms

• 51 Overcurrent High:

  • I>>: 0.05 to 40.00 x In
  • t: 20 to 300,000 ms

• 51 Overcurrent Low:

  • I>: 0.05 to 40.00 x In
  • t: 20 to 300,000 ms

• 51 IDMT Overcurrent (Inverse Definite Minimum Time):

  • Ie: 0.050 to 40.000 In
  • K: 0.050 to 1.500

Module Features:

• Input Channels: 14
• Possible Auxiliary Voltage Ranges:
  • 19...72 V DC (Threshold: 14 V DC)
  • 88...132 V DC (Threshold: 50 V DC)
  • 88...132 V DC (Threshold: 72 V DC)
  • 176...264 V DC (Threshold: 143 V DC)
• Hardware-Fixed Filter Time: 1 ms (Additional filter time configurable in software)

Power Outputs (Channels BO 1 to 6):

• Maximum Operating Voltage: 250 V AC/DC
• Make Current: 8 A
• Load Current: 6 A
• Breaking Capacity: 70 W (1 contact), 130 W (2 contacts in series) at L/R ≤ 40 ms, 10,000 operations
• Operating Time: 8 ms

Signal Outputs:

• Channels BO7 and BO8, and Watchdog Output (WD):

  • Maximum Operating Voltage: 250 V AC/DC
  • Load Current: 2 A
  • Operating Time: 8 ms

• Optional Static Output on BO7:

  • Maximum Operating Voltage: 250 V DC
  • Make Current: 1.5 A peak
  • Load Current: 0.7 A continuous
  • Operating Time: 1 ms

• Coil Supervision Circuit on BO2:

  • Coil OK when impedance is below 10 Ω