Monitoring Relays 1-Phase Frequency Control Types SF 110, SF 125 * Frequency control relay * Fixed bandwidth, 6 or 10 Hz (SF 110) or knob-adjustable bandwidth (SF 125) * Quartz-controlled digital circuit (SF 125) * Centre frequency: 50 or 60 Hz * Output: 10 A SPDT relay * Plug-in type module * S-housing * LED-indication for output ON * AC power supply, 50 or 60 Hz Product Description 1-phase plug-in frequency control relays with fixed as well as adjustable bandwidth. Ordering Key Often used in connection with generator equipment. SF 110 024 50/6 Housing Function Output Type Power supply Centre frequency Bandwidth Type Selection Plug Output Centre frequency Bandwidth Circular SPDT 50 Hz 50 Hz 6 Hz 10 Hz 50 Hz 50 Hz 1, 3, 5 Hz 2, 4, 6 Hz 60 Hz 60 Hz 6 Hz 10 Hz 60 Hz 60 Hz 1, 3, 5 Hz 2, 4, 6 Hz Supply: 24 VAC Supply: 115 VAC Supply: 230 VAC SF 110 024 50/6 SF 110 024 50/10 SF 110 115 50/6 SF 110 115 50/10 SF 110 230 50/6 SF 110 230 50/10 SF 125 024 50/5 SF 125 024 50/6 SF 125 115 50/5 SF 125 115 50/6 SF 125 230 50/5 SF 125 230 50/6 SF 110 024 60/6 SF 110 024 60/10 SF 110 115 60/6 SF 110 115 60/10 SF 110 230 60/6 SF 110 230 60/10 SF 125 024 60/5 SF 125 024 60/6 SF 125 115 60/5 SF 125 115 60/6 SF 125 230 60/5 SF 125 230 60/6 Input Specifications Supply Specifications Input Pin 2 & 10 Power supply AC types Rated operational voltage Through pins 2 & 6 024 115 230 Voltage interruption Dielectric voltage Rated impulse withstand volt. Centre frequency Bandwidth Supply voltage measures on own supply 50 or 60 Hz Fixed (SF 110): 6 or 10 Hz 0.5 Hz Adjust. (SF 125): 1, 3, 5 Hz 0.02 Hz or 2, 4, 6 Hz 0.02 Hz Rated operational power AC supply Specifications are subject to change without notice (13.03.01) Overvoltage cat. III (IEC 60664) (IEC 60038) 24 VAC 15%, 50 or 60 Hz 115 VAC 15%, 50 or 60 Hz 230 VAC 15%, 50 or 60 Hz 40 ms 2 kVAC (rms) (supply/elect.) 4 kV (1.2/50 s) (line/neutral, line/line), direct connection to electronics 2.5 VA 1 SF 110, SF 125 Output Specifications General Specifications Output Rated insulation voltage SPDT relay 250 VAC (rms) (cont./elect.) (micro gap) 10 A/250 VAC (2500 VA) 1 A/250 VDC (250 W) 10 A/25 VDC (250 W) 2.5 A/230 VAC 5 A/24 VDC 30 x 106 operations 2.5 x 105 operations (at max. load) 7200 operations/h Reaction time SF 110: Relay operates: = 0.1 s Relay releases: = 1 s max. 2.5 s SF 125: Indication for Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Approvals LED, red (IEC 60947-1) IP 20 B (IEC 60529) 2 (IEC 60664) -20 to +50C (-4 to +122F) -50 to +85C (-58 to +185F) 200 g UL, CSA CE Marking Yes 0.5 Hz, the relay will be in operating position, otherwise it will release. front of the relay, is 1, 3, 5 or 2, 4, 6 Hz, equaling the below tolerances: the power supply is kept within the limits, e.g. 49 to 51 Hz, 0.01 Hz, the relay will be in operating position. SF 125 The relay monitors that the frequency of the power supply - 50 or 60 Hz nominally - is kept within certain preselected tolerances. The bandwidth, which is set on the potentiometer at the Frequency 1 Hz 3 Hz 5 Hz 2 Hz 4 Hz 6 Hz As long as the Contact ratings (AgCdO) Resistive loads AC 1 DC 1 or Small inductive loads AC 15 DC 13 Mechanical life Electrical life AC 1 Operating frequency Dielectric strength Dielectric voltage 2.0 kVAC (rms) (cont./elect.) Rated impulse withstand volt. 4 kV (1.2/50 s) (cont./elect.) (IEC 60664) Mode of Operation SF 110 The relay monitors that the frequency of the power supply - 50 or 60 Hz nominally - is kept within a fixed tolerance. The tolerance has a value of 3 Hz ( 5 Hz), which equals a fixed bandwidth of 6 Hz (10 Hz). As long as the frequency of the power supply is kept within the limits, e.g. 47 to 53 Hz, Tolerance 0.5 Hz 1.5 Hz 2.5 Hz 1 Hz 2 Hz 3 Hz frequency of The relay responds within 1 s. The delay is due to the fact that the measuring principle is a digital counting of the half cycles on a quartz-controlled base time of 1 s. Operation Diagram fc - { 0.5 - 1.5 - 2.5 Hz 1 - 2 - 3 Hz Centre frequency (fc) - 1.5 - 2.5 Hz fc - { 0.5 1 - 2 - 3 Hz Relay ON Power supply Wiring Diagram Range Setting Bandwidth setting (SF 125) The bandwidth is set by builtin potentiometer at the front of the housing. Hysteresis SF 110: < 1% of centre frequency. Power supply SF 110, SF 125 2 Specifications are subject to change without notice