IDM-3 3-PHASE AMMETER
THE IDM-3 THREE-PHASE AMMETER The IDM-3 is a microprocessor-based three-phase ammeter that provides instantaneous and peak lagged-demand ammeter readings. Operational features of the IDM-3 include keypad programming, sampling, and digital-integration techniques developed for the MPU-16A motor protection unit, and dual isolated analog outputs for a data-acquisition system.
IDM-3 3-PHASE AMMETER Compact 1/4 DIN size Panel or surface mount Isolated analog outputs Program-change lockout -40°C to 60°C operating temperature Interface current transformer
IDM-3 METERING FUNCTIONS Digital Display of: CT-primary rating Demand response time Analog output option Scanned currents Instantaneous currents Peak lagged-demand currents
IDM-3 TYPICAL APPLICATION SUPPLY PHASE CT'S N LOAD ANALOG OUTPUT 1 (SIGNAL) L 7 8 9 10 A B C COM 6 5 4 3 2 1 ICT-3 11 PROGRAM CHANGE LOCKOUT 13 14 15 16 17 18 19 20 21 22 23 24 A ICT B C O M P E - + SHIELD IDM-3 12 10 9 8 7 6 5 4 3 2 1 L2 L1 ANALOG OUT 1 2 ANALOG OUTPUT ANALOG OUTPUT 2 (ADDRESS)
IDM-3 FACE PLATE LIQUID CRYSTAL DISPLAY MODE digit: Identifies mode VALUE digits: Display meter readings PE/ALARM, Red LED On: Alarm condition Flashing: Program-change lockout defeated PROCESSOR, Green LED Indicator On: Processor functional MODE LIST MEMBRANE SWITCH KEYPAD ENTER switch: Enters value digits RAMP switch: Adjusts value digits MODE switch: Selects modes “0” through “F” RESET switch: Resets peak values
ICT-3 INTERFACE CT