DFC01DB23

Monitoring Relays Frequency monitoring Type DFC01 • Over and under frequency monitoring relay • Measures if power supply frequency is within set limits • Measures on own power supply • Separately adjustable upper/lower level on relative scale • Separately adjustable delay functions (0.1 to 30 s) • Output: 2 x 8 A SPDT relays • For mounting on DIN-rail in accordance with DIN/EN 50 022 • 45 mm Euronorm housing • LED indication for relays, alarm and power supply ON Product Description Ordering key DFC01 is a precise frequency monitoring relay. It monitors its own power supply. Overfrequency and underfrequency can be monitored separately with two independent setpoints, delay times and relay outputs. The LED's indicate the state of the alarm and the output relay. Housing Function Type Item number Output Power Supply DFC 01 D B23 Type Selection Mounting Output Supply: 24/48 VAC Supply: 115/230 VAC DIN-rail 2 x SPDT DFC 01 D B48 DFC 01 D B23 Input Specifications Output Specifications Input Own power supply Measuring ranges Selectable by DIP-switches 2 Hz range 50 Hz 60 Hz 10 Hz range 50 Hz 60 Hz Ranges Upper frequency level Output Rated insulation voltage Contact ratings (AgSnO2) Resistive loads AC 1 DC 12 Small inductive loads AC 15 DC 13 Mechanical life Electrical life Lower frequency level Hysteresis (frequency) 2 Hz range 10 Hz range A1, A2 or A2, A3 Upper level Lower level +0.2 to +2.2 Hz -2.2 to -0.2Hz 50.2 to 52.2 Hz 47.8 to 49.8 Hz 60.2 to 62.2 Hz 57.8 to 59.8 Hz +1 to +11 Hz -11 to -1 Hz 51 to 61 Hz 39 to 49 Hz 61 to 71 Hz 49 to 59 Hz 2 x SPDT relays N.E. 250 VAC µ 8 A @ 250 VAC 5 A @ 24 VDC 2.5 A @ 250 VAC 2.5 A @ 24 VDC ≥ 30 x 106 operations ≥ 105 operations (at 8 A, 250 V, cos ϕ = 1) ≤ 7200 operations/h +10 to +110% of the selected range -110 to -10% of the selected range Operating frequency Dielectric strength Dielectric voltage ≥ 2 kVAC (rms) Rated impulse withstand volt. 4 kV (1.2/50 µs) ~ 0.05 Hz ~ 0.25 Hz Supply Specifications Power supply Rated operational voltage through terminals: B48: B23: Rated operational power Specifications are subject to change without notice (26.05.10) Overvoltage cat. III (IEC 60664, IEC 60038) A1, A2 or A3, A2 24/48 VAC ± 15% 40 to 70 Hz, insulated 115/230 VAC ± 15% 40 to 70 Hz, insulated 5 VA 1 DFC01 General Specifications Power ON delay Accuracy Temperature drift Delay ON alarm Repeatability Reaction time Frequency level Alarm ON delay: Alarm OFF delay: Indication for Power supply ON Alarm ON Output relays ON Environment Degree of protection Pollution degree Operating temperature Storage temperature 1 s ± 0.5 s (15 min warm-up time) ± 1000 ppm/°C ± 10% on set value ± 50 ms ± 0.5% on full-scale < 200 ms (delay < 0.1 s) < 200 ms (delay < 0.1 s) LED, green LED, red (flashing 2 Hz during delay time) 2 x LED, yellow (EN 60529) IP 20 3 -20 to +60°C, R.H. < 95% -30 to 80°C, R.H. < 95% Housing Dimensions Material Weight Screw terminals Tightening torque Product standard Approvals CE Marking EMC Immunity Emissions 45 x 80 x 99.5 mm PA66 or Noryl Approx. 220 g Max. 0.5 Nm acc. to IEC 60947 EN 60255-6 UL, CSA L.V. Directive 2006/95/EC EMC Directive 2004/108/EC According According According According to to to to EN EN EN EN 60255-26 61000-6-2 60255-26 61000-6-3 Mode of Operation DFC01 monitors the frequency value of its own power supply. Example 1 (N.D. relay) Both relays are OFF as soon as the frequency is above the lower setpoint and below the upper setpoint. When the measured frequency exceeds the upper set level for more than the set delay time relay 1 is turned ON; if it drops below the lower set level for more than the set delay time relay 2 is turned ON. Each relay releases when the measured frequency comes back within its limits. The red LED flashes until the delay time has expired or the measured value falls off the limits. Example 2 (N.E. relay) The relay operates and the yellow LED is ON as long as the measured frequency is within the upper and lower limits. Relay 1 releases in alarm position as soon as the measured frequency exceeds the upper set level for more than the set delay time; relay 2 releases as soon as the measured frequency drops below the lower set level for more than the set delay time. The red LED flashes until the delay time has expired or the measured value comes back within the limits. Each relay is activated when the measured frequency comes back within its limits. Function/Range/Level/Time Setting Select the desired function setting the DIP-switches 1 to 6 as shown on the right. To access the DIP-switches open the plastic cover using a screwdriver as shown below. Output ON: 2 x SPDT relays OFF: 1 x DPDT relay Centre left knob: Setting of upper frequency level on relative scale. Power ON delay ON: 6 s ± 0.5 s OFF: 1 s ± 0.5 s Centre right knob: Setting of lower frequency level on relative scale. System frequency ON: 60 Hz OFF: 50 Hz Lower knobs: Setting of delays on alarm time on absolute scale: 0.1 to 30 s. Frequency setpoint range ON: 2 Hz OFF: 10 Hz 2 Relay working mode ON: Normally De-energized OFF: Normally Energized Specifications are subject to change without notice (26.05.10) DFC01 Operation Diagrams Ex. 1 (Upper) ON (15/16/18) (Lower) ON (25/26/28) Ex. 2 (Upper) ON (15/16/18) (Lower) ON (25/26/28) Dimensions Wiring Diagram 48/230 VAC 24/115 VAC 16 18 26 28 A2 15 63 A3 m 80 A1 m 83.5 L 99.5 45 25 28.5 N Specifications are subject to change without notice (26.05.10) 3