Relay for monitoring of the supply frequency Nominal frequency selectable 50 Hz or 60 Hz Adjustable bandwidth from 1 to 10 Hz Selectable reaction delay 0.1 sec. or 1 sec. 1- or 2-pole relay output Made in accordance with the and EMC regulations C-mac® frequency relay type RF20 is used for monitoring EMC and safety regulations. of the supply frequency, f.inst. in connection with genera- Emmision: EN 50 081 - 1 tor controls. Immunity: EN 50 082 - 2 By means of connections on the relay base you can select Safety: EN 60 730 between nominal frequency of 50 or 60 Hz and reaction Approvals: The units are produced in accordance with the CE delay 0.1 sec. or 1 sec. og low voltage regulations. On the built-in potentiometer, the bandwidth is adjustable between +/- 0.5 Hz and +/- 5 Hz. If the supply frequency is within the adjusted bandwidth, the relay is activated, and if the frequency is outside the liFunctional diagram: mits, the output relay releases after the selected reaction delay. supply Common technical data: Supply voltage, AC: Supply frequency: Isolation voltage: Power consumption: Operation temp.: Humidity: Adjustments: Bandwidth: Indications: Green LED: Red LED: Accuracy: scale: min. bandwidth: max. bandwidth: Hysteresis: Nominal frequency: Reaction delay: Max. load, relay: 24, 115 and 230 VAC +/- 10% 40-70 Hz Supply - input - output: 3.75 kV 2,5 VA -20°C to +60°C 0 - 90% RH, non-condensing Potentiometer, scale 1 to 10 Hz (+/-0.5 Hz til +/-5 Hz) setpoint hysteresis nom.freq. frequency hysteresis setpoint relay t t = reaction delay (0,1 or 1 sek.) Supply voltage connected Relay active 5% +/- 0.02 Hz +/- 0.04 Hz 10% of the adjusted bandwidth. pin 6-7 open: 50 Hz, closed: 60 Hz pin 5-7 open: 1 sec., closed: 0.1 sec. 1-pole: 8 A - 250 VAC 2-pole: 5 A - 250 VAC, ohmic load

Ordering guide: Supply Type number. 24 VAC RF20-x-1-024 120 VAC RF20-x-1-115 230 VAC RF20-x-1-230 x = relay output: 1 = 1-pole 2 = 2-pole 2-pole version only reaction delay nominal frequency C-mac Control module 4 Supply Relay Materials and weight: Housing: NORYL-SE-1, grey, self-extinguishing Housing bottom: NORYL SE-1, GFN-2, black, self-extinguishing Terminals: Nickel-plated brass Weight: 200 g