Phase-sequence Phase-loss Relay K8DS-PH Three-phase Phase-sequence Phase-loss Relay Using Voltage Detection Method Lineup includes a 17.5-mm slim, compact model. Greater resistance to inverter noise. Distinguishes between positive phases, reversed phases, and phase loss when power is turned ON. Supports phase loss detection when the motor is operating. Output status can be monitored using LED indicator. Ideal to prevent reverse operation of motors. Refer to Safety Precautions for the K8AK Series on page 86. Refer to page 44 for commonly asked questions. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Ordering Information List of Models Function Rated input voltage* Relay output Model Phase sequence and phase 3-phase, 3-wire 200 to 480 SPDT 1 K8DS-PH1 loss monitoring VAC * The power supply is shared with the rated input voltage. 1K8DS-PH Ratings and Specifications Ratings Rated input voltage 3-phase, 200 to 480 VAC (3-wire) Input load Approx. 2.7 VA Reversed phase and phase loss operating 0.1 s max. time Reset method Automatic reset Indicators Power (PWR): Green, Relay output (RY): Yellow Output relays One SPDT relay (NC operation) Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Max. switching voltage Output relay ratings 250 VAC or 30 VDC Max. switching current: 5 A Maximum switching capacity: 1,250 VA, 150 W 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 Nm 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. Terminal wiring method 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 Weight Approx. 60 g Mounting Mounts to DIN Track. Dimensions 17.5 80 73 mm (WDH) 2