specifications are subject to change without notice (26.10.99) 1 current and voltage controls type euy ? true rms measuring on own power supply ? frequency range 45-440 hz ? monitoring relay and 3-phased measuring relay for over/under voltage control (closed circuit) ? monitors phase asymmetry ? monitors phase loss/phase sequence ? measures if all 3 phase-phase voltages are within set limits ? upper and lower limits separately adjustable ? adjustable asymmetry ? 2 separately adjustable time functions (0.1-30 s) ? 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 the 2 relay outputs (flashing when timing) 3-phase true rms, multi-function product description ordering key housing function type output power supply true rms 3-phase monitoring relay for separate over and un- der voltage, asymmetry and phase failure control. the advantage of true rms meas- uring is that correct values are always obtained irrespective of the waveform of the meas- ured voltage, i.e. the euy measures the correct rms value of a normal sinusoidal power supply as well as of a distorted power supply. fre- quency range 45 to 440 hz. with relays measuring aver- age value (eub, euc) correct values are only obtained for true sinusoidal power sup- plies. often used in motor ap- plications where it is impor- tant to detect the reliability of the electrical power. type selection mounting output supply: supply: supply: supply: supply: supply: supply: 115 vac 220 vac 240 vac 400 vac 480 vac 600 vac 690 vac for din-rail 2 x spdt euy c 115 euy c 220 euy c 240 euy c 400 euy c 480 euy c 600 euy c 690 input specifications input u, v, w l1 - l2 - l3 measures on own supply phase sequence not arbitrary frequency range 45-440 hz measuring ranges 115 92-132 vac (true rms) 220 176-253 vac 240 192-276 vac 400 320-460 vac 480 384-552 vac 600 480-690 vac 690 552-794 vac range upper level (sep. adjustable) 80 - 115% lower level (sep. adjustable) 80 - 115% asymmetry (sep. adjustable) 5-25% of nominal range phase loss (phase-phase) 70% of nominal range output specifications output 2 x spdt relay rated insulation voltage 250 vac (contact/elect.) upper limit terminals 25/26/28 lower limit terminals 15/16/18 contact ratings (agcdo) (micro gap) resistive loads ac 1 5 a, 250 vac dc 1 5 a, 24 vdc small inductive loads ac 15 2 a, 250 vac dc 13 3 a, 24 vdc mechanical life 3 40 x 10 6 operations electrical life 3 10 5 operations (at max. load) operating frequency 7200 operations/h dielectric strength dielectric voltage 2 kvac (rms) rated impulse withstand volt. 4 kv (1.2/50 s) euy c 400
2 specifications are subject to change without notice (26.10.99) euy general specifications power on delay 3 s reaction time switching out 1. priority error 1.5 s 2. priority error 3.0 s switching in 4.0 s accuracy range 5% temperature drift 0.1%/c delay (upper/lower level) 30 s, 5% on max. < 0.1 s on min. temperature drift 0.05%/c ( 0.06%/f) hysteresis level < 2.0% asymmetry < 3.0% indication for power supply on led, green output/error condition 2 x led's, yellow (see led table) environment degree of protection ip 20 pollution degree 3 operating temperature -10 to +50c (-4 to +122f) storage temperature -50 to +85c (-58 to +185f) weight 280 g screw terminals tightening torque max. 0.5 nm acc. to iec 60947 approvals ul, csa supply specifications power supply overvoltage cat. iii (iec 60664) rated operational voltage (iec 60038) through term. u, v, w 115 115 vac, -20/+15% 45-440 hz 220 220 vac, -20/+15% 45-440 hz 240 240 vac, -20/+15% 45-440 hz 400 400 vac, -20/+15% 45-440 hz 480 480 vac, -20/+15% 45-440 hz 600 600 vac, -20/+15% 45-440 hz 690 690 vac, -20/+15% 45-440 hz voltage interruption 40 ms dielectric voltage none rated impulse withstand voltage up to 480 vac 4 kv (1.2/50 s) up to 690 vac 6 kv (1.2/50 s) rated operational power 5 va supplied from l1, l3 mode of operation connected to the 3 phases, the euy operates and the two out- put relays are energized when all three phases are present at the same time, the phase se- quence is correct, the mea- sured asymmetry is below set value and the 3 phase-phase voltages are within set limits. this is indicated by the two led's. if one or more of the phase-phase voltages rises above, or if the measured asymmetry exceeds the set level, then the centre (yellow) led starts to flash, and the output relay (terminals 25/26/ 28) releases after the set time period. if one or more of the phase-phase voltages drops below the set level, then the left (yellow) led starts to flash, and the output relay (termi- nals 15/16/18) releases after the set time period. if the phase sequence is wrong or one phase is lost, then the two built-in output relays will re- lease immediately. no time function will occur. the failure will be indicated by the two yellow led's. at phase loss both led's will flash. at wrong phase sequence the led's will flash alternately (see led ta- ble). example 1 mains network monitoring the relay monitors over and under voltage, phase loss, cor- rect phase sequence and that the phase asymmetry is within the adjusted level. example 2 starting and operating load monitoring the euy ensures correct start- ing and operating conditions. the relay controls the voltage level, phase sequence, asym- metry and the correct direc- tion of motor rotation. frequent failures are fuse blowing, asymmetry, and incor- rect voltage level. in case of fuse blowing the motor will re- generate a voltage in the inter- rupted phase. the euy will detect the failure and react immediately due to excessive imbalance between the phases. asymmetry/level/time setting time 1 setting (lower level) centre right knob: setting of time delay on abso- lute scale (0.1-30 s). time 2 setting (upper level) upper right knob: setting of time delay on abso- lute scale (0.1-30 s). asymmetry setting lower right knob: setting of asymmetry level on absolute scale. level setting upper left knob: setting of upper limit on abso- lute scale. lower left knob: setting of lower limit on abso- lute scale.
specifications are subject to change without notice (26.10.99) 3 phase sequence switches switches no time delay both led's flash alternately. both led's flash alternately. remains if phase sequence off off frequency 3 hz. frequency 3 hz. on is wrong wiring diagrams example 1 example 2 table for relay position and led-indication failure relay for relay for time left yellow led (1) centre yellow led (2) right green led lower level upper level delay for lower level for upper level for power on term. 15/16/18 term. 25/26/28 indication indication indication the voltage remains switches time 2 ul remains led starts flashing (during the time period) remains rises above on off time delay on when the measured voltage exceeds the set on the ul set value adj. 0.1-30 s value. frequency 1 hz. switches off after delay. the voltage switches remains time 1 ll led starts flashing (during the time period) remains remains drops below off on time delay when the measured voltage drops below the set on on the ll set value adj. 0.1-30 s value. frequency 1 hz . switches off after delay. asymmetry remains switches time 2 ul switches led starts flashing (during the time period) remains exceeds set level on off time delay off when the measured asymmetry exceeds the set on adj. 0.1-30 s value. frequency 8 hz. switches off after delay. phase loss switches switches no time delay both led's flash in phase. frequency 3 hz. both led's flash in phase. frequency 3 hz. remains voltage drops below off off if l2 or l3 are lost no led indication will if l2 or l3 are lost no led indication will on 70% of nom. range occur. (l2 and l3 are supplying the system). occur. (l2 and l3 are supplying the system). euy operation diagram upper level hysteresis hysteresis lower level asymmetry hysteresis u l1 v l2 w l3 relay 2 upper (25/26/28) relay 1 lower (15/16/18) l2-l3 l1-l2 l1-l3 overlapping switches switches no time delay indicating actual fault. indicating actual fault. green led starts flashing. of ll and ul off off frequency 3 hz. set level
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