New Product Three-phase Voltage and Phase-sequence Phase-loss Relay K8AK-PM Ideal for Monitoring 3-phase Power Supplies for Industrial Facilities and Equipment. Greater resistance to inverter noise. Monitor overvoltages, undervoltages, phase sequence, and phase loss for three-phase 3-wire or 4-wire power supplies with just one Unit. Switch setting for 3-phase 3-wire or 3-phase 4-wire power supply. Two SPDT output relays, 5 A at 250 VAC (resistive load). Output overvoltages and undervoltages using separate relays. World-wide power specifications supported by one Unit (switchable). For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Output status can be monitored using LED indicator. Refer to Safety Precautions on page 10. Refer to page 8 to 9 for commonly asked questions. Ordering Information List of Models Rated input* Model 3-phase 3-wire mode 200, 220, 230, 240 VAC K8AK-PM1 3-phase 4-wire mode 115, 127, 133, 138 VAC 3-phase 3-wire mode 380, 400, 415, 480 VAC K8AK-PM2 3-phase 4-wire mode 220, 230, 240, 277 VAC Note: Three-phase 3-wire or 4-wire and the input range are switched using a DIP switch. * The power supply voltage is the same as the rated input voltage. Single K8AK Monitors 3-phase Power Supply with 3 or 4 Wires Monitoring Relays can be used to monitor 3-phase power supplies with 3 or 4 wires simply by changing DIP switch settings. Phase to phase voltage (3 wires) Phase to neutral voltage (4 wires) L1 L2 L3 L1 L2 L3 N 230VAC 400VAC 230VAC 400VAC 400VAC 230VAC A Single K8AK Can Monitor a 3-phase Power Supply Anywhere in the World Reduces Maintenance Parts Inventory SW3 ON OFF ON OFF SW4 ON ON OFF OFF K8AK-PM1 ON P-N 138 V 133 V 127 V 115 V SW2 OFF P-P 240V 230 V 220 V 200 V K8AK-PM2 ON P-N 277 V 240 V 230 V 220 V SW2 OFF P-P 480 V 415 V 400 V 380 V 1K8AK-PM Ratings and Specifications Ratings Rated input K8AK-PM1 Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC voltage Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC K8AK-PM2 Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC Input load K8AK-PM1: Approx. 4.4 VA K8AK-PM2: Approx. 4.4 VA Operating value setting range (OVER, UNDER) Overvoltage 30% to 25% of rated input voltage Undervoltage 30% to 25% of rated input voltage Note: The rated input voltage can be switched using the DIP switch. Operating value 100% operation at set value Reset value 5% of operating value (fixed) Reset method Automatic reset Operating time Overvoltage/undervoltage 0.1 to 30 s setting range (T) Phase sequence 0.1 s0.05 s Phase loss 0.1 s max. Power ON lock time (LOCK) 1 s or 5 s (Switched using DIP switch.) Indicators Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red Output relays Two SPDT relays (NC operation) Output relay ratings Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations 3 A at 250 VAC/30 VDC: 100,000 operations Ambient operating temperature 20 to 60C (with no condensation or icing) Storage temperature 25 to 65C (with no condensation or icing) Ambient operating humidity 25% to 85% (with no condensation) Storage humidity 25% to 85% (with no condensation) Altitude 2,000 m max. Terminal screw tightening torque 0.49 to 0.59 Nm Terminal wiring method Recommended wire 2 Solid wire: 2.5 mm Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact Case color N1.5 Case material PC and ABS, UL 94 V-0 Weight Approx. 150 g Mounting Mounts to DIN Track. Dimensions 22.5 90 100 mm (WHD) 2