EUAT480

Current and Voltage Controls 3-Phase Sequence and Phase Loss Type EUA • 3-phase monitoring relay for phase sequence/phase loss (closed circuit) • Measures when all 3 phases are present and have the correct phase sequence • Measures on own power supply • Knob-adjustable level setting • Output: Up to 3 x 5 A SPDT relay • For mounting on DIN-rail in accordance with DIN/EN 50 022 • 45 mm Euronorm housing • LED-indication for relay and power supply ON Product Description 3-phase line voltage monitoring and phase sequence/ phase loss relay. Adjustment on built-in potentiometer of monitored voltage within ±15% of rated operational voltage. For mounting on DINrail. Frequently used to secure the right phase sequence when applying a load to a 3phase electrical network. Ordering Key Housing Function Type Output Power supply EUA C 400 Type Selection Mounting For DIN-rail Output 1 SPDT 2 SPDT 3 SPDT Supply: 220 VAC EUA C 220 EUA D 220 EUA T 220 Supply: 400 VAC EUA C 400 EUA D 400 EUA T 400 Supply: 480 VAC EUA C 480 EUA D 480 EUA T 480 Supply: 600 VAC EUA C 600 EUA D 600 Input Specifications Input U, V, W Measuring ranges 220 400 480 600 L1 - L2 - L3 measures on own supply 187-253 VAC 340-460 VAC 408-552 VAC 510-690 VAC 70% of voltage setting ±15% (of rated operational voltage) Supply Specifications Power supply Rated operational voltage Through term. U, V, W 220 400 480 600 Voltage interruption Dielectric voltage Rated impulse withstand voltage up to 480 VAC up to 600 VAC Rated operational power Supplied from Overvoltage cat. III (IEC 60664) (IEC 60038) 220 VAC, ±15% 50/60 Hz, -5/+5 Hz 400 VAC, ±15% 50/60 Hz, -5/+5 Hz 480 VAC, ±15% 50/60 Hz, -5/+5 Hz 600 VAC, ±15% 50/60 Hz, -5/+5 Hz ≤ 40 ms None 4 kV (1.2/50 µs) 6 kV (1.2/50 µs) 2.5 VA L1 & L3 ON-level Voltage setting Output Specifications Output Rated insulation voltage Contact ratings (AgCdO) AC 1 Resistive loads DC 1 Small inductive loads AC 15 DC 13 Mechanical life Electrical life 1, 2 or 3 x SPDT relay 250 VAC (contact/elect.) 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) Specifications are subject to change without notice (10.01.00) 1 EUA General Specifications Reaction time OFF-delay ON-delay Accuracy Temperature drift Hysteresis Indication for Power supply ON Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Screw terminals Tightening torque Approvals CE-marking < 30 ms < 500 ms ±10% ≤ 0.2%/°C (≤ 0.11%/°F) < 10% LED, green LED, yellow IP 20 3 -20° 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 Yes Mode of Operation EUA measures on its own 3phased power supply, and the relay operates when all phases are present and the phase sequence is correct. The level of the monitored voltage is adjustable on the front of the module within ±15%. The relay releases when one or more of the phases drops below 70% of the set level. (Ex. if the voltage regenerated by electric motors exceeds the 70% level, the set level can be adjusted until the relay releases). Example 1 The relay monitors that the power supply has the correct phase sequence and that all phase voltages are present. Example 2 The relay releases in case of interruption of one of the phases, provided that the regenerated voltage does not exceed the 70% level (see above). Range Setting Potentiometer for setting of measuring range (line voltage). Wiring Diagrams Example1 L3 L2 L1 Example 2 L3 L2 L1 M µ m