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Maximum Demand Indicator from Crompton.   Maximum Demand Indicator, for the measurement of fundamental electrical parameters, integrating high accuracy measurement technology with the simplicity and visibility of a single display system. Got Questions? Call or email. Integra 523 Measures A, A Demand V,L-L and Max Demand. Integra 524 Measures A, A Demand V,L-L, V, L-N and Max Demand Distribution pillars, Feeder panels & switchboards, Low voltage switchgear Process control and monitoring, Motor control centers Energy monitoring, Any application requiring Maximum Demand measurements. Build the model number by following this example. Description: Meter +System+ W  Volts In+ Current In+ Aux+ Options Model   Circuit Description Order Number Price 510 Three Phase, 3 Wire. A, V L-L, Hz (7 Measurements), Input 380-480V, 5 A 244-513W-38LS 166.40 510 Three Phase, 4 Wire. A, V L-N, Hz (7 Measurements), Input 380-480V, 5A 244-514W-38LS 176.80 520 Three Phase, 3W. A, A Demand, A Max Demand, V L-L(12 Measurements) Input 380-480V, 5A 244-523W-38LS 210.00 520 Three Phase, 4 Wire. A, A Demand, A Max Demand, V L-L, V L-N(15 Measurements), Input 380-480V, 5A 244-524W-38LS 210.00 530 Three Phase, 3 Wire - As 523 but with one output relay. Input 380-480V, 5 A 244-533W-38LS 210.00 530 Three Phase, 4 Wire - As 524 but with one output relay. Input 380-480V, 5A    244-534W-38LS 210.00 540 Three Phase, 3 Wire - As 523 but with two output relays. Input 380-480V, 5A  244-543W-38LS 210.00 540 Three Phase, 4 Wire - As 524 but with two output relays. Input 380-480V, 5A  244-544W-38LS 210.00 Self powered  SP   Auxiliary Powered                      100-120V -10                                                   190-240V -19                                                   380-480V -38   One Demand Relay for 520 244-53S 20.88 Two Demand Relay for 530 244-54S 22.88 Benefits Totally new look MDI, 10 measurements in one unit, Programmable C.T. ratios Programmable time period, Readable in bright sunlight, Replaces 3 combined MDI & 1 Voltmeter Simple to use, Measures down to 2.5% of nominal input, overload capability Features High contrast LCD, Large characters, Standard 96 x 96mm DIN case Self powered or Auxiliary powered, Average sensing, Password protected Reset can be disabled, Two button operation, Designed to meet world-wide standard approvals for safety and performance, EMC and LVD. Input Specification System: Three phase - three wire, Model 244-523. Three phase - four wire, Model 244-524 Voltage: 100-120V L-L,190-240V L-L, 380-480V L-L Current: 5 amps (Standard) or 1 amp (Optional) Maximum C.T. ratio 8000:5A or 8000:1A Measuring Range: Current 2.5 - 120% Current Demand 2.5 - 120% Voltage (Auxiliary Powered) 2.5 - 120% Voltage (Self Powered) 75 - 125% of 115, 230 or 460V Frequency: 45 to 66Hz Demand Integration Period: 8, 15, 30 & 60 minutes Burden: Voltage: Each line 0.2VA approx. Current: Each phase 0.6VA approx. Overload Capability: Continuous: 120% of nominal (600V Max) Short Duration: 2 x nominal for one second Repeated 10 times at 10 second intervals. Current: Continuous: 120% of nominal Short Duration: 20 x nominal/1second Repeated 5 times at 5 minute intervals 10 x nominal for 3 seconds Repeated 5 times at 5 minute intervals 5 x nominal for 5seconds Repeated 5 times at 5 minute intervals Auxiliary Supply A.C. voltage: 100 - 120V 190 - 240V 380 - 480V -10% of lower nominal +20% of upper nominal Burden 3VA approx. Enclosure: Size: 96 x 96 mm DIN Material: Flame retardant to UL94V-0/V-2 Terminals: M3.5 captive screw & clamp Accuracy Class Voltage: +1.5% of nominal Current: +1.5% of nominal Current Demand: 3% of nominal Climatic Temperature: Operating -10 to +70°C Storage -20 to +80°C Calibration 23°C Temp Coeff: ±0.013%/°C (typical) Humidity: 95% RH non condensing Isolation: 2.2kV RMS 50Hz for 1 minute Surge Voltage Test: IEC 801-5 High Frequency Disturbance: 4.2kV peak IEC 255 Display High contrast LCD & Annunciation Characters 10.5mm high 3 lines of data, 4 digits per line 4 digit resolution with a floating decimal point for each value All parameters available via single button operation cascading through 4 screens Comprehensive set-up facility via two buttons Update time 7.5 seconds approx. for  A & V, 1/8 of demand integration time for current demand.