NEW Product Thermistor Motor Protection Relay K8AK-TS/-PT Monitor Temperature Rise through Internal Motor Loss Temperature, phase sequence, and phase loss monitoring with the DIN 22.5-mm-sized K8AK-PT Relays. Side-by-side mounting of K8AK-PT Relays. Specially designed for internal motor monitoring no setting required. Test/Reset Button for confirmation of output operation. Monitoring also performed for thermistor disconnections and short circuits. Manual or automatic resetting with the same Relay. Refer to Safety Precautions on page 8. Refer to page 7 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 Power supply voltage Model Phase sequence, phase loss, and temperature monitoring K8AK-PT1 100-240 VAC 100 to 240 VAC K8AK-TS1 100-240 VAC Temperature monitoring 24 VAC/DC K8AK-TS1 24 VAC/DC 1K8AK-TS/-PT Ratings and Specifications Ratings Power supply 24 VAC/DC Isolated power supply voltage 100 to 240 VAC 24 VAC/DC: 1.8 VA/1.0 W max. Power consumption 100 to 240 VAC: 3.5 VA max. Rated input voltage 3-phase, 200 to 480 VAC (3-wire) Phase sequence on three- 0.1 s0.05 s phase voltage input Operating time Phase loss on three-phase 0.1 s max. (when the voltage changes rapidly from 100% to 0% of rated voltage) voltage input PTC thermistor input 0.2 s max. Manual reset/automatic reset (switchable) Reset method Note: Manual reset method: Press the TEST/RESET button. Indicators Power (PWR): Green, PH Alarm outputs (ALM): Red, TS Alarm outputs (ALM): Red Output relays One SPDT relay output (normally closed operation) Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Output relay ratings 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 or 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 Recommended wire 2 Solid wire: 2.5 mm Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. Terminal wiring method 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