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 8A relay SPDT * 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 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 Ordering key 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 Output Rated insulation voltage Contact ratings (AgSnO2) Resistive loads AC 1 DC 12 Small inductive loads AC 15 DC 13 Mechanical life Electrical life Measuring ranges Selectable by DIP-switches 2 Hz range 50 Hz 60 Hz 10 Hz range 50 Hz 60 Hz Ranges Upper frequency level 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 49.8 to 52.2 Hz 59.8 to 62.2 Hz -1 to +11 Hz 49 to 61 Hz 59 to 71 Hz -2.2 to +0.2Hz 47.8 to 50.2 Hz 57.8 to 60.2 Hz -11 to +1 Hz 39 to 51 Hz 49 to 61 Hz +10 to +110% of the selected range -110 to -10% of the selected range ~ 0.05 Hz ~ 0.25 Hz Operating frequency Dielectric strength Dielectric voltage 2 kVAC (rms) Rated impulse withstand volt. 4 kV (1.2/50 s) Supply Specifications Power supply Rated operational voltage through terminals: B48: B23: Rated operational power Specifications are subject to change without notice (01.07.04) 2 x SPDT relays N.E. 250 VAC 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 = 1) 7200 operations/h 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 Approvals CE Marking EMC Immunity Emissions 48/230 VAC 24/115 VAC L A1 < 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 +60C, R.H. < 95% -30 to 80C, R.H. < 95% A3 A2 16 m 18 26 15 28 25 N Dimensions 45 x 80 x 99.5 mm Approx. 220 g Max. 0.5 Nm acc. to IEC 60947 UL, CSA Yes Electromagnetic Compatibility According to EN 61000-6-2 According to EN 50081-1 m 99.5 45 83.5 Output relays ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Housing dimensions DIN-rail versions Weight Screw terminals Tightening torque 1 s 0.5 s (15 min warm-up time) 1000 ppm/C 10% on set value 50 ms 0.5% on full-scale 80 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 Wiring Diagram 63 General Specifications 28.5 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 lower frequency level on relative scale. Centre right knob: Setting of upper frequency level on relative scale. Lower knobs: Setting of delays on alarm time on absolute scale: 0.1 to 30 s. Power ON delay ON: 6 s 0.5 s OFF: 1 s 0.5 s 2 Relay working mode ON: Normally De-energized OFF: Normally Energized System frequency ON: 60 Hz OFF: 50 Hz Frequency setpoint range ON: 2 Hz OFF: 10 Hz Specifications are subject to change without notice (01.07.04) DFC01 Mode of Operation 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. 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 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. Operation Diagrams Ex. 1 Power Supply Upper setpoint Hysteresis Hysteresis Lower setpoint 1 or 6 s Relay 1 T1 1 or 6 s Relay 2 DPDT T1 T2 1 or 6 s T T 1 or 6 s T1 T1 Red LED Ex. 2 Power Supply Upper setpoint Hysteresis Hysteresis Lower setpoint Relay 1 Relay 2 DPDT 1 or 6 s 1 or 6 s T2 T T Red LED Specifications are subject to change without notice (01.07.04) 3