Current and Voltage Controls 3-Phase True RMS, Multi-Function 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) Product Description Ordering Key True rms 3-phase monitoring relay for separate over and under voltage, asymmetry and phase failure control. The advantage of true rms measuring is that correct values are always obtained irrespective of the waveform of the measured voltage, i.e. the EUY measures the correct rms value of a normal sinusoidal Housing Function Type Output Power supply power supply as well as of a distorted power supply. Frequency range 45 to 440 Hz. With relays measuring average value (EUB, EUC) correct values are only obtained for true sinusoidal power supplies. Often used in motor applications where it is important to detect the reliability of the electrical power. EUY C 400 Type Selection Mounting Output Supply: 115 VAC Supply: 220 VAC Supply: 240 VAC Supply: 400 VAC Supply: 480 VAC Supply: 600 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 Output Specifications Input U, V, W Output Rated insulation voltage Upper limit Lower limit Contact ratings (AgCdO) AC 1 Resistive loads DC 1 Small inductive loads AC 15 DC 13 Mechanical life Electrical life Frequency range Measuring ranges (True rms) 115 220 240 400 480 600 690 Range Upper level (sep. adjustable) Lower level (sep. adjustable) Asymmetry (sep. adjustable) Phase loss (phase-phase) L1 - L2 - L3 measures on own supply phase sequence not arbitrary 45-440 Hz 92-132 VAC 176-253 VAC 192-276 VAC 320-460 VAC 384-552 VAC 480-690 VAC 552-794 VAC 80 - 115% 80 - 115% 5-25% of nominal range 70% of nominal range Specifications are subject to change without notice (26.10.99) Supply: 690 VAC 2 x SPDT relay 250 VAC (contact/elect.) Terminals 25/26/28 Terminals 15/16/18 µ (micro gap) 5 A, 250 VAC 5 A, 24 VDC 2 A, 250 VAC 3 A, 24 VDC ≥ 40 x 106 operations ≥ 105 operations (at max. load) ≤ 7200 operations/h Operating frequency Dielectric strength Dielectric voltage 2 kVAC (rms) Rated impulse withstand volt. 4 kV (1.2/50 µs) 1 EUY Supply Specifications General Specifications Power supply Rated operational voltage Through term. U, V, W 115 Power ON delay Reaction time Switching out 1. priority error 2. priority error Switching in Accuracy Range Temperature drift Delay (upper/lower level) Overvoltage cat. III (IEC 60664) (IEC 60038) 115 VAC, -20/+15% 45-440 Hz 220 VAC, -20/+15% 45-440 Hz 240 VAC, -20/+15% 45-440 Hz 400 VAC, -20/+15% 45-440 Hz 480 VAC, -20/+15% 45-440 Hz 600 VAC, -20/+15% 45-440 Hz 690 VAC, -20/+15% 45-440 Hz ≤ 40 ms None 220 240 400 480 600 690 Voltage interruption Dielectric voltage Rated impulse withstand voltage up to 480 VAC up to 690 VAC Rated operational power Supplied from 4 kV (1.2/50 µs) 6 kV (1.2/50 µs) 5 VA L1, L3 Temperature drift Hysteresis Level Asymmetry Indication for Power supply ON Output/error condition Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Screw terminals Tightening torque Approvals ≤3s ≤ 1.5 s ≤ 3.0 s ≤ 4.0 s ≤ 5% ≤ 0.1%/°C 30 s, ±5% on max. < 0.1 s on min. ≤ 0.05%/°C (≤ 0.06%/°F) < 2.0% < 3.0% LED, green 2 x LED's, yellow (see LED table) IP 20 3 -10° to +50°C (-4° to +122°F) -50° to +85°C (-58° to +185°F) 280 g Max. 0.5 Nm acc. to IEC 60947 UL, CSA Mode of Operation Connected to the 3 phases, the EUY operates and the two output relays are energized when all three phases are present at the same time, the phase sequence is correct, the measured 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 (terminals 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 release 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 table). Example 1 Mains network monitoring The relay monitors over and under voltage, phase loss, correct phase sequence and that the phase asymmetry is within the adjusted level. The EUY ensures correct starting and operating conditions. The relay controls the voltage level, phase sequence, asymmetry and the correct direction of motor rotation. Example 2 Starting and operating load monitoring Frequent failures are fuse blowing, asymmetry, and incorrect voltage level. In case of fuse blowing the motor will regenerate a voltage in the interrupted phase. The EUY will detect the failure and react immediately due to excessive imbalance between the phases. Time 2 setting (upper level) Upper right knob: Setting of time delay on absolute scale (0.1-30 s). Asymmetry setting Lower right knob: Setting of asymmetry level on absolute scale. Asymmetry/Level/Time Setting Level setting Upper left knob: Setting of upper limit on absolute scale. Time 1 setting (lower level) Centre right knob: Setting of time delay on absolute scale (0.1-30 s). Lower left knob: Setting of lower limit on absolute scale. 2 Specifications are subject to change without notice (26.10.99) EUY Wiring Diagrams Example 1 Example 2 µ µ Table for Relay Position and LED-indication Failure Relay for lower level term. 15/16/18 Relay for upper level term. 25/26/28 Time delay Left yellow LED (1) for lower level indication Centre yellow LED (2) for upper level indication Right green LED for power ON indication The voltage rises above the UL set value Remains ON Switches OFF Time 2 UL Time delay Adj. 0.1-30 s Remains ON LED starts flashing (during the time period) when the measured voltage exceeds the set value. Frequency 1 Hz. Switches off after delay. Remains ON The voltage drops below the LL set value Switches OFF Remains ON Time 1 LL Time delay Adj. 0.1-30 s LED starts flashing (during the time period) when the measured voltage drops below the set value. Frequency 1 Hz. Switches off after delay. Remains ON Remains ON Asymmetry exceeds set level Remains ON Switches OFF Time 2 UL Time delay Adj. 0.1-30 s Switches OFF LED starts flashing (during the time period) when the measured asymmetry exceeds the set value. Frequency 8 Hz. Switches off after delay. Remains ON Phase loss voltage drops below 70% of nom. range Switches OFF Switches OFF No time delay Both LED's flash in phase. Frequency 3 Hz. If L2 or L3 are lost no LED indication will occur. (L2 and L3 are supplying the system). Both LED's flash in phase. Frequency 3 Hz. If L2 or L3 are lost no LED indication will occur. (L2 and L3 are supplying the system). Remains ON Phase sequence If phase sequence is wrong Switches OFF Switches OFF No time delay Both LED's flash alternately. Frequency 3 Hz. Both LED's flash alternately. Frequency 3 Hz. Remains ON Overlapping of LL and UL set level Switches OFF Switches OFF No time delay Indicating actual fault. Indicating actual fault. Green LED starts flashing. Frequency 3 Hz. Operation Diagram Upper level Hysteresis Lower level Hysteresis L1-L2 L2-L3 L1-L3 Asymmetry Hysteresis U L1 V L2 W L3 Relay 2 upper (25/26/28) Relay 1 lower (15/16/18) Specifications are subject to change without notice (26.10.99) 3