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