Current and Voltage Controls Frequency Monitoring Control Type EFA • Microprocessor-based frequency measurement • 10-position rotary switch for selection of bandwidth • Separate setting of upper/lower limits • Monitors on own power supply • 2 separately adjustable time functions (0.1-30 s) • Quartz-controlled digital circuit • Selectable centre frequency 50/60 Hz • Output: 2 x 5 A SPDT relays (one relay for each level) • For mounting on DIN-rail in accordance with DIN/EN 50 022 • 45 mm Euronorm housing • LED-indication for power supply ON • Two LED's indicating fault and/or status of relay output (flashing when timing) • Galvanically separated power supply Product Description Ordering Key EFA is monitoring the frequency of an AC power supply with the possibility of separate adjustment of upper/ lower limits. This relay offers Housing Function Type Output Power supply the user many application possibilities e.g. in connection with wind-driven generators or similar equipment. EFA C 230 Type Selection Mounting Output Measuring range Supply: 24 VAC Supply: 115 VAC Supply: 230 VAC For DIN-rail 2 x SPDT 50-60 Hz EFA C 024 EFA C 115 EFA C 230 Input Specifications Output Specifications Input Through terminals A1 & A2 Output Rated insulation voltage Contact ratings (AgCdO) AC 1 Resistive loads DC 1 Small inductive loads AC 15 DC 13 Mechanical life Electrical life Measuring range Bandwidth selectable by 2 separate rotary switches Measuring on own power supply Upper level Lower level 0.5 Hz 1.0 Hz 1.5 Hz 2.0 Hz 2.5 Hz 3.0 Hz 4.0 Hz 5.0 Hz 6.0 Hz 10.0 Hz 0.5 Hz 1.0 Hz 1.5 Hz 2.0 Hz 2.5 Hz 3.0 Hz 4.0 Hz 5.0 Hz 6.0 Hz 10.0 Hz 2 x SPDT relay 250 VAC (contact/elect.) µ (micro gap) 5 A, 250 VAC 5 A, 24 VDC 2 A, 250 VAC 3 A, 24 VDC ≥ 40 x 106 operations ≥ 105 operations (at max load) ≤ 7200 operations/h Operating frequency Dielectric strength Dielectric voltage 2 kVAC (rms) Rated impulse withstand volt. 4 kV (1.2/50 µs) Supply Specifications Power supply Rated operational voltage Through pins A1 & A2 024 115 230 Voltage interruption Dielectric voltage Rated impulse withstand voltage Rated operational power Specifications are subject to change without notice (26.10.99) Overvoltage cat. III (IEC 60664) (IEC 60038) 24 VAC ±15%, 40 to 70 Hz 115 VAC ±15%, 40 to 70 Hz 230 VAC ±15%, 40 to 70 Hz ≤ 40 ms ≥ 2 kVAC (rms) 4 kV (1.2/50 µs) 3 VA 1 EFA General Specifications Mode of Operation Power ON delay Power OFF delay Reaction time Accuracy Frequency Time delay Temperature drift Hysteresis Indication for Power supply ON Output ON EFA measures the frequency of its own sinusoidal power supply, and the output relay is energized as long as the frequency is within the set upper/lower limits. This is indicated by the two built-in yellow LED's. If the frequency drops below the set lower limit, then the right yellow LED starts to flash and the output relay releases after the set time period. There will be no LED-indication after the time delay has expired. If the frequency rises above the set upper limit, then the centre yellow LED starts to flash and the output relay releases after the set time period. EFA has a power ON delay of approx. 200 ms to prevent the relay from operating under inrush conditions. 200 ms > 250 ms @ 230 VAC ≤ 400 ms 0.01% 0.1-30 s ±15% ≤ 0.01%/°C (≤ 0.006%/°F) ≤ 0.5% LED, green 2 LED's, yellow (indicating upper/lower level) Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Screw terminals Tightening torqu Approvals IP 20 3 -10° to +50°C (-14° to +122°F) -50° to +85°C (-58° to +185°F) 250 g Max. 0.5 Nm acc. to IEC 60947 UL, CSA Wiring Diagram Range/Time Setting Range setting Upper left knob: Setting of upper limit on rotary switch. L µ Lower left knob: Setting of lower limit on rotary switch. Frequency range setting Upper right knob: Rotary switch for selection of frequency range. Time setting Lower right knob: Setting of time delay on absolute scale (0.1-30 s) for lower frequency range. Centre right knob: Setting of time delay on absolute scale (0.1-30 s) for upper frequency range. N Operation Diagram Power supply Upper frequency limit Hysteresis Lower frequency limit Hysteresis Relay 2 upper ( 25/26/28) Relay 1 lower ( 15/16/18) 2 Specifications are subject to change without notice (26.10.99)