K8AK-PA3-phase control 3-phase asymmetry, phase sequence, phase loss relay Monitors voltage asymmetry, phase sequence and phase loss for 3-phase 3-wire or 4-wire power supplies, in one unit. • Worldwide power specifications supported by one unit • Phase sequence, phase loss: Operation reaction time 0.1 s maximum • Asymmetry: Operation time setting from 0.1 to 30 s • Reset method: Automatic •PowerON lock: 1 s or 5 s Ordering information Rated input Order code 3-phase 3-wire mode 200, 220, 230, 240 VACK8AK-PA1 3-phase 4-wire mode 115, 127, 133, 138 VAC 3-phase 3-wire mode 380, 400, 415, 480 VACK8AK-PA2 3-phase 4-wire mode 220, 230, 240, 277 VAC Specifications Ambient operating temperature –20 to 60°C (with no condensation or icing) Storage temperature –25 to 65°C (with no condensation or icing) Altitude 2,000 m max. Input frequency50/60 Hz (AC power supply) Output relays (1 × SPDT, normally closed operation) Resistive load5 A at 250VAC or at 30 VDC Maximum contact voltage250VAC or 30 VDC Maximum contact current 5 A Maximum switching capacity 1,250 VA, 150 W Mechanical life10,000,000 operations Electrical life 50,000 operations at 5 A, 250VAC or 30 VDC Degree of protection Terminal section: IP20 Case material PC and ABS WeightApprox. 130 g Rated input voltageK8AK-PA1 3-phase,3-wire mode: 200,220,230,240VAC, 3-phase, 4-wire mode: 115, 127, 133, 138 VAC K8AK-PA23-phase,3-wire mode: 380,400,415,480VAC, 3-phase, 4-wire mode: 220, 230, 240, 277 VAC Asymmetry operation (ASY.) Operating value setting rangeAsymmetry rate: 2% to 22% Operating value100% operation at set value Asymmetry operating value = rated input voltage x asymmetry set value [%] The asymmetry operation will function when the difference between the highest and lowest voltage phases equals or exceeds the asymmetry operating value Reset (HYS.)Hysteresis 5% of operating value (fixed) Resetting methodAutomatic reset Operating time (T) Asymmetry0.1 s to 30 s Phase-sequence, phase-loss 0.1 s max. Power ON lock (LOCK) 1 s or 5 s (Changed with the DIP switch) Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC) Repeat accuracy Operating value±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power supply voltage, DC or 50/60 Hz sine wave input) Operating time±50 ms (at 25°C and 65% humidity, rated power supply voltage) IndicatorsPower (PWR): Green LED, relayoutput (RY): Yellow LED, alarm outputs (ALM 1/2):Red LED Applicable standards Conforming standards EN 60947-5-1 Installation environment (pollution level 2, installation category III) EMC EN 60947-5-1 Safety standardsUL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA and CCC Size in mm (H × W × D) 90 × 22.5 × 100 649
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