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400Hz. Switchboard Meter. Digital Meter with 400Hz. Input Measurement capability. Replaces Crompton's analog 077, 007, Yokogawa  AB40 400Hz. Frequency Meters. Optional Relay and RS485 Communications. Alpha 20A+ Fits  standard switchboard meter cutout. Single and 3 phase Multi Meter measuring Inputs up to frequency's of 420 Hz. Powered by 60-300V AC/DC 50-60Hz.Field Configureable. Multi Meter parameters  measuring: Volts Amps, Frequency, 400Hz. RPM,  kW. kVAr, KVA, kWh, Current Demand, KVA Demand RS485 Modbus port and relay limit switch or pulse output. 1ea. AP20A+ 311EA-LR00                   $275.00 Options: Relay 1 pulse Output (Limit switch)  $25.00 Communications RS485 Modbus     $45.00 Alpha20A+ Data Sheet.