specifications are subject to change without notice (26.10.99) 1 current and voltage controls ? ac current metering relay ? measuring range: 0.5 - 500 aac with 1-phase current metering transformer, type mi... ? upper and lower current limits separately adjustable ? output: 8 a dpdt relay ? for mounting on din-rail in accordance with din/en 50 022 ? h4-housing ? led-indication for power supply and output on ? ac power supply product description 1-phase ac current metering relay. for mounting on din- rail. adjustment of upper and lower current values possible. ordering key housing type output power supply type selection plug output supply: 24 vac supply: 115 vac supply: 230 vac screw dpdt h 479 166 024 h 479 166 115 h 479 166 230 terminals output dpdt relay rated insulation voltage 250 vac (rms) (cont./elect., cont./cont.) contact ratings (agcdo) (micro gap) resistive loads ac 1 8 a/250 vac (2000 va) dc 1 0.4 a/250 vdc (100 w) or 4 a/25 vdc (100 w) small inductive loads ac 15 2.5 a/230 vac dc 13 5 a/24 vdc mechanical life 3 30 x 10 6 operations electrical life ac 1 3 2.5 x 10 5 operations (at max. load) operating frequency 7200 operations/h dielectric strength dielectric voltage 3 2 kvac (rms) (cont./elect.) rated impulse withstand volt. 4 kv (1.2/50 s) (cont./elect.) (iec 60664) input specifications input overvoltage cat. iii (iec 60664) terminals 7 & 8 nom. voltage: 0.4-4 v p max. 20 v from current trans- former mi ... impedance 9.9 k measuring ranges range max. current types of current transformers aac rms rms mi 5 0.5 - 5 20 aac mi 20 2 - 20 50 mi 100 10 - 100 250 aac mi 500 50 - 500 700 aac often used where a reaction has to be taken e.g. when a motor exceeds the set value. power supply ac types overvoltage cat. iii (iec 60664) rated operational voltage (iec 60038) through term. 21 & 22 024 24 vac 15%, 45 to 65 hz 115 115 vac 15%, 45 to 65 hz 230 230 vac 15%, 45 to 65 hz voltage interruption 40 ms dielectric voltage 2 kvac (rms) (supply/elect.) rated impulse withstand volt. 4 kv (1.2/50 s) (line/neutral, line/line), no direct connec- tion to electronics rated operational power 2.5 va 1-phase max. and min. current control type h 479 output specifications supply specifications h 479 166 230
2 specifications are subject to change without notice (26.10.99) h 479 reaction time t = 0.2 s, worst case reaction time may be up to 5 x t indication for power supply on led, green output on led, red environment (iec 60947-1) degree of protection ip 20 b/front ip 40 d (iec 60529) pollution degree 3 (iec 60664) operating temperature -20 to +50c (-4 to +122f) storage temperature -50 to +85c (-58 to +185f) weight 300 g mode of operation the relay operates when the current is within set points (including hysteresis) and re- leases when the measured current drops below/exceeds the set points (under and over current monitoring). if the lower set point is set above the upper set point, the output relay releases and cannot be activated before the lower set point is set lower than the upper set point. wiring diagram current metering transfor mers mi 5, mi 20, mi 100, mi 500. for further information refer to "current metering trans- formers". accessories range setting range setting right potentiometer: upper limit adjustable from 10 to 100% of max. value of 4 v p . left potentiometer: lower limit adjustable from 8 to 98% of max. value of 4 v p . hysteresis approx. 1% of set point valu- es. operation diagram hysteresis hysteresis relay on power supply h 479 pe = term. 8 general specifications upper limit lower limit power supply
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