Technical Specifications Parameter Specification Brand OMRON Model K8AK-PA2 Series K8AK-PA Type Three-phase Asymmetry, Phase-sequence, and Phase-loss Relay Rated Input Voltage Three-phase 3-wire mode: 380, 400, 415, 480 VAC / Three-phase 4-wire mode: 220, 230, 240, 277 VAC Input Load Approx. 4.4 VA Input Frequency 50/60 Hz Overload Capacity Continuous input at 115% of maximum; 125% for 10 seconds (up to 600 VAC) Monitoring Specifications Parameter Value Asymmetry Set Value Range 2% to 22% of rated input voltage Reset Value (Hysteresis) 5% of operating value (fixed) Operating Time Setting Range (T) 0.1 to 30 seconds Phase Sequence Operating Time 0.1 s ± 0.05 s Phase Loss Operating Time 0.1 s max. Power ON Lock Time (LOCK) Selectable: 1 second or 5 seconds (DIP switch setting) Reset Method Automatic reset Output Specifications Parameter Specification Output Type Relay, SPDT (1 Form C), NC operation Rated Load (Resistive) 250 VAC / 5 A, 30 VDC / 5 A Maximum Switching Capacity 1,250 VA, 150 W Minimum Load 5 VDC, 10 mA (reference value) Electrical Life 5 A at 250 VAC/30 VDC: 50,000 operations / 3 A: 100,000 operations Mechanical Life 10,000,000 operations min. General Specifications Parameter Specification Ambient Operating Temperature -20°C to 60°C (with no condensation or icing) Storage Temperature -25°C to 65°C Ambient Operating Humidity 25% to 85% (with no condensation) Altitude 2,000 m max. Degree of Protection Terminals: IP20 Mounting DIN Rail mounting Terminal Type Screw terminals Terminal Screw Torque 0.49 to 0.59 N·m Case Material PC and ABS, UL 94 V-0 Dimensions (W × H × D) 22.5 × 90 × 100 mm Weight Approx. 130 g