Current and Voltage Controls 3-Phase Voltage Sequence Control Type H 470 • 3-phase monitoring relay for phase sequence/phase loss • Measures when all 3 phases are present and have the correct phase sequence • 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-phase measuring voltage Product Description Ordering Key H 470 156 400 right phase sequence when connecting a load to a 3phase electrical system. Housing Type Output Power supply Plug Output Supply: 230 VAC Supply: 400 VAC Screw terminals SPDT H 470 156 230 H 470 156 400 3-phase monitoring and phase sequence/phase loss relay for DIN-rail mounting. Frequently used to secure the Type Selection Input Specifications Output Specifications Input Terminal 21 Terminal 22 Terminal 23 Terminal 24 Output Rated insulation voltage Neutral (optional connection) Phase L1 Phase L2 Phase L3 measures on own supply Supply Specifications Power supply AC types Rated operational voltage Through term. 21, 22, 230 23 & 24 400 Overvoltage cat. III (IEC 60664) (IEC 60038) 3 x 230 VAC ± 15%, 45 to 65 Hz 3 x 400 VAC ± 15%, 45 to 65 Hz Voltage interruption ≤ 40 ms Dielectric voltage None (supply/elect.) Rated impulse withstand volt. 4 kV (1.2/50 µs) (line/neutral, line/line), direct connection to electronics Rated operational power 2.5 VA Specifications are subject to change without notice (26.10.99) Contact ratings (AgCdO) Resistive loads AC 1 DC 1 or Small inductive loads AC 15 DC 13 Mechanical life Electrical life AC 1 Operating frequency Dielectric strength Dielectric voltage Rated impulse withstand volt. SPDT relay 250 VAC (rms) (cont./elect.) µ (micro gap) 10 A/250 VAC (2500 VA) 1 A/250 VDC (250 W) 10 A/25 VDC (250 W) 2.5 A/230 VAC 5 A/24 VDC ≥ 30 x 106 operations ≥ 2.5 x 105 operations (at max. load) ≤ 7200 operations/h ≥ 2 kVAC (rms) (cont./elect.) 4 kV (1.2/50 µs) (cont./elect.) (IEC 60664) 1 H 470 General Specifications Reaction time Indication for Power supply ON Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Mode of Operation τ = 0.5 s, worst case reaction time may be up to 5 x τ LED, green LED, red (IEC 60947-1) IP 20 B/front IP 40 D (IEC 60529) 3 (IEC 60664) -20° to +50°C (-4° to +122°F) -50° to +85°C (-58° to +185°F) 300 g The relay measures on its own 3-phased power supply and operates when all phases are present and the phase sequence is correct. Example 1 Own power supply monitoring The relay is for monitoring that the power supply has correct phase sequence and that all phase voltages are present. The relay shall be mounted in front of the fuses of each load. Example 2 Load monitoring The relay releases in case of interruption of one of the phases, provided that the voltage regenerated by electric motors on the interrupted phase does not exceed 70% of the nominal voltage. If it exceeds this value the connection cannot be recommended (see description ex. 3). Example 3 If the value of the regenerated voltage is slightly higher than 70% of the nominal voltage, the relay releases when neutral is connected to terminal 21 as sensitivity is improved. Wiring Diagrams Example 1 Example 2 Example 3 µ H 470 µ µ H 470 H 470 Operation Diagram Phase L1, terminal 22 Phase L2, terminal 23 Phase L3, terminal 24 Relay ON 2 Specifications are subject to change without notice (26.10.99)