Selected parameters OUTPUT SIGNAL 1 relay SETPOINTS 2, adjustable MONITORED VARIABLE Frequency monitoring Others SIZE 22,5 mm POWER SUPPLY RANGE 24÷240 VAC MONITORING FUNCTION Over and under frequency MOUTING DIN-rail INPUT RANGE 50-60 Hz DELAY 1, adjustable
Monitoring Relays Frequency Monitoring Types DFB01, PFB01 DFB01 PFB01 • Over/under frequency monitoring relays • Measuring if power supply frequency is within set limits • Measure on own power supply • Measuring ranges Voltage: 24 to 240 VAC Frequency: 50 - 60 Hz • Separately adjustable upper/lower level on relative scale • Adjustable delay on alarm or on recovery (0.1 to 30 s) • Programmable latching or inhibit at set level • Output: 8 A SPDT relay N.D. or N.E. selectable • For mounting on DIN-rail in accordance with DIN/EN 50 022 (DFB01) or plug-in module (PFB01) • 22.5 mm Euronorm housing (DFB01) or 36 mm plug-in module (PFB01) • LED indication for relay, alarm and power supply ON Product Description Ordering key DFB 01 C M24 DFB01 and PFB01 are pre- cise frequency monitoring relays. The relays monitor their own power supply from 24 to 240 VAC. The advantage of using the latch function isthat the relay can be kept energized even after the end of the alarm condition. Inhibit func- tion can be used to avoid relay operation when not desired(maintenance, tran- sitions). The LED's indicate thestateofthealarm and the output relay. Housing Function Type Item number Output Power Supply Type Selection Mounting OutputMeasuring rangeSupply: 24 to 240 VAC DIN-rail SPDT50-60 HzDFB 01 C M24 Plug-inSPDT50-60 HzPFB 01 C M24 InputSpecificationsOutput Specifications Input Own power supplyDFB01: A1, A2 (24 to 240 VAC) PFB01: 2, 10 (24 to 240 VAC) Measuring ranges Upper levelLower level Selectable by DIP-switches 2 Hz range-0.2 to +2 Hz-2 to +0.2 Hz 50 Hz 49.8 to 52 Hz48 to 50.2 Hz 60 Hz 59.8 to 62 Hz58 to 60.2 Hz 10 Hz range-1 to +10 Hz -10 to +1 Hz 50 Hz49 to 60 Hz 40 to 51 Hz 60 Hz59 to 70 Hz 50 to 61 Hz Contact input DFB02Terminals Z1, Z2 PFB02Terminals 8, 9 Disabled > 10 kΩ Enabled< 500 Ω Pulse width > 500 ms Hysteresis OutputSPDT relay Rated insulation voltage250 VAC Contact ratings (AgSnO2)µ Resistive loadsAC 1 8A @ 250 VAC DC 12 5 A @ 24 VDC Small inductive loads AC 15 2.5 A @ 250 VAC DC 13 2.5 A @ 24 VDC Mechanical life≥ 30 x 106 operations Electrical life ≥ 105 operations (at 8 A, 250 V, cos ϕ = 1) Operating frequency≤ 7200 operations/h Dielectric strength Dielectric voltage≥ 2 kVAC (rms) Rated impulse withstand volt.4 kV (1.2/50 µs) 2 Hz range~ 0.05 Hz 10 Hz range~ 0.25 Hz Specifications are subject to change without notice (26.05.10)1
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