specifications are subject to change without notice (26.10.99) 1 current and voltage controls product description 3-phase monitoring relay for din-rail mounting for phase sequence, phase loss, phase asymmetry and phase angle. ordering key housing type output power supply frequency type selection plug output freq. supply: 220 vac supply: 380 vac supply: 400 vac supply: 415 vac screw spdt 50 hz h 471 156 220-50 hz h 471 156 380-50 hz h 471 156 400-50 hz h 471 156 415-50 hz terminals 60 hz h 471 156 220-60 hz h 471 156 380-60 hz h 471 156 400-60 hz h 471 156 415-60 hz ? mains network quality and load monitoring relay ? monitors phase sequence, phase loss, phase asymmetry and phase angle ? measures asymmetry on 3-ph. voltage without neutral ? built-in adjustable timer function ? knob-adjustable asymmetry sensitivity ? output: 10 a spdt relay ? for mounting on din-rail in accordance with din/en 50 022 ? h4-housing ? led-indication for power supply and output on ? power supply is the 3-phased measuring voltage input specifications input terminal 22 phase l3 terminal 23 phase l2 terminal 24 phase l1 measures on own supply output spdt relay rated insulation voltage 250 vac (rms) (cont./elect.) contact ratings (agcdo) (micro gap) resistive loads ac 1 10 a/250 vac (2500 va) dc 1 1 a/250 vdc (250 w) or 10 a/25 vdc (250 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) power supply ac types overvoltage cat. iii (iec 60664) rated operational voltage (iec 60038) through term. 22, 23 & 24 220 3 x 220 vac 15%, 50 or 60 hz 380 3 x 380 vac 15%, 50 or 60 hz 400 3 x 400 vac 15%, 50 or 60 hz 415 3 x 415 vac 15%, 50 or 60 hz voltage interruption 40 ms dielectric voltage none (supply/elect.) rated impulse withstand volt. 4 kv (1.2/50 s) (line/neutral, line/line), direct connection to electronics rated operational power 3 va often used to control phase asymmetry in order to pre- vent any damage to the con- nected motors. 3-phase asymmetrical relay type h 471 output specifications supply specifications h 471 156 380-50 hz
2 specifications are subject to change without notice (26.10.99) h 471 reaction time t = 0.2 s, worst case reaction time may be up to 5 x t adjustable delay on release built-in (0.2 s - 10s) note : reaction time + set time = actual delay on release time accuracy off delay 10 s, -1/+3 s on max. < o.1 s on min. time function delay on release 0.2-10 s. adj. 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 approval csa mode of operation applications of asymmetry i : mains monitoring: phase sequence. phase loss. phase amplitude asymme- try. ii :load monitoring: phase sequence (direction of motor rotation). fuse blowing. example 1 mains network monitoring the relay measures phase loss, that the power supply has correct phase sequence, that all three phases are present, and that the phase asymme- try is within the preset level. the knob-adjustable h 471 detects phase asymmetries of 2 to 12% of phase-phase amplitude. the relay operates when all three phases are present at the same time and the phase sequence is correct as well as the measured asymmetry/ unbalance is below set point (2 to 12% of phase asymme- try). phase angle failures are registered as phase asymme- try. if the supply voltage drops to approx. 25% of the phase- phase voltage, the relay re- leases without time delay. time/range setting range setting left potentiometer: phase asymmetry sensitivity 2 to 12% of phase-phase amplitude. adjustable on ab- solute scale. time setting right potentiometer: time setting on relative scale. adjustable delay on release: 0.2 to 10 s. wiring diagrams example 1 h 471 example 2 h 471 l3 l2 l1 l3 l2 l1 general specifications regenerated phase depends on the actual mechanical load and motor size. in this case it is a combination of phase amplitude and phase angle asymmetry higher than 2-3%. setting turn the asymmetry potentio- meter counterclockwise (from max.) until the relay releases. continue adjusting approx. 1 mark clockwise to ensure cor- rect operation. at approx. 5% or less asymmetry, ensure that possible power supply variations do not result in er- roneous release. setting the allowed asymmetry for the mains voltage amplitudes is set on the potentiometer. example 2 load monitoring the 3-phased monitoring re- lay for electrical loads ensures correct starting and operat- ing conditions. the relay mo- nitors phase sequence and consequently the correct di- rection of motor rotation. the most frequent cause of asymmetry and unbalance is fuse blowing. in this case the motor regenerates the inter- rupted phase. the size of the
specifications are subject to change without notice (26.10.99) 3 h 471 operation diagram phase l1, terminal 24 phase l2, terminal 23 phase l3, terminal 22 set asymmetry hysteresis measured asymmetry relay on
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