Current and Voltage Controls 3-Phase Voltage Sequence Control Type SM 170 • 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 • Plug-in type module • S-housing • LED-indication for power supply and output ON • Power supply is the 3-phased measuring voltage Product Description Ordering Key 3-phase plug-in monitoring and phase sequence/phaseloss relay. Frequently used to prevent a 3-phase motor from Housing Function Output Type Power supply running on only 2 phases or to secure the right phase sequence when connecting a load to the mains. SM 170 400 Type Selection Plug Output Supply: 220 VAC Supply: 380 VAC Supply: 400 VAC Supply: 415 VAC Circular SPDT SM 170 220 SM 170 380 SM 170 400 SM 170 415 Input Specifications Output Specifications Input Pin 5 Pin 6 Pin 7 Pin 11 Output Rated insulation voltage Phase L1 Phase L2 Phase L3 Neutral (optional connection) measures on own supply Supply Specifications Power supply AC types Rated operational voltage Through pins 5, 6, 7 & 11 Overvoltage cat. III (IEC 60664) (IEC 60038) 220 380 400 415 Internal measuring circuit is connected to pins 5 & 7 3 x 220 VAC ± 15%, 45 to 65 Hz 3 x 380 VAC ± 15%, 45 to 65 Hz 3 x 400 VAC ± 15%, 45 to 65 Hz 3 x 415 VAC ± 15%, 45 to 65 Hz Voltage interruption Dielectric voltage Rated impulse withstand volt. ≤ 40 ms None (supply/elect.) 4 kV (1.2/50 µs) (line/neutral, line/line), direct connection to electronics 2.5 VA Rated operational power Specifications are subject to change without notice 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 SM 170 General Specifications Reaction time Indication for Power supply ON Output ON Environment Degree of protection Pollution degree Operating temperature Storage temperature Weight Approvals 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 (IEC 60529) (IEC 60664) 1: SM 170 380/400/415 2: SM 170 220 -20° to +50°C (-4° to +122°F) -50° to +85°C (-58° to +185°F) 200 g UL, CSA, SEV (SEV only 3 x 220 VAC) Mode of Operation 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 The relay is for monitoring that the power supply has a correct phase sequence and that all phase voltages are present. The relay is a 3-phase power supply monitoring relay. Example 2 The relay releases in case of interruption of one of the phases, provided that the voltage regenerated by electric motors on the interupted phase does not exceed 70% of the nominal voltage. If it exceeds this value the connection cannot be recommended (see description ex. 3). The regenerated voltage will be a lower phase voltage combined with a phase angle failure. 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 pin 11 as sensitivity is improved. Wiring Diagrams Example 1 Example 2 and 3 Accessories Sockets◊ Hold down spring◊ Mounting rack Socket covers Front mounting bezel S 411 HF SM 13 BB 4 FRS 2 For further information refer to "Accessories". Operation Diagram Phase L1, pin 5 Phase L2, pin 6 Phase L3, pin 7 Relay ON 2 Specifications are subject to change without notice