KWH-400 MACOM | Alldatasheet

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Kilowatt Hour Energy Meter ENERGY PRODUCTS

KWH-400 – DIN Panel Mounted Kilowatt Hour Energy Meter This innovative self contained 96mm DIN panel mounted kilowatt hour meter measures the real consumption of active energy to Class 1.0 accuracy, displayed via a 6 digit auto-resetting electro-mechanical counter. The unit also provides status and diagnostic information via LED indicators on the front panel, and incorporates an integral pulsed output for communication of energy usage. The KWH-400 unit is designed for connection to either 3 phase 3 wire, or 3 phase 4 wire unbalanced loads and is ideal for secondary metering in switchgear, plant instrumentation and process control applications, offering considerable advantages over traditional rotating disc type kilowatt hour meters. Operation This class 1.0 instrument uses microprocessor controlled circuitry for optimum performance and accuracy. The unit takes the incoming voltage and current signals and converts them into numbers representing the instantaneous values. These are then multiplied together to give the instantaneous power. This sampling is repeated many times during each cycle of the waveform, which allows accurate true RMS measurement of distorted waveforms. These values are accumulated until enough energy has been measured to increment the counter by one digit. The electro- mechanical counter is auto-resetting, and will reset to 000000 from 999999.

3 Phase Voltage Status

The unit incorporates one green ‘ON’ LED for each voltage phase. Three illuminated LEDs indicate active monitoring of each of the three phases. In the event of a missing phase voltage, the appropriate LED will switch off, however, the meter will continue to accurately measure energy for the available voltage phases. A flashing green LED indicates incorrect phase sequence connection, and wiring should be checked. The meter will not give accurate readings if the phase sequence is incorrect. Reverse Connected Current Transformers For each of the three phases, a red ‘REV’ LED will illuminate to indicate a reverse connected CT. The wiring should be checked, but the meter will continue to accurately register the energy consumption even if the CTs are reverse connected. Pulse Indicator The unit features a dedicated red LED pulse indicator which flashes at a rate proportional to the measured power. Pulsed Outputs The KWH-400 unit features an integral pulsed output, pulsed at a rate proportional to the measured energy, and connected via screw clamp terminals. The pulse rate scales appropriately to the CT settings. The re-transmission of kW.h time based energy status to TTL circuits, CMOS circuits or management systems is achieved via the fully volt free opto-isolator open collector transistor output. A pull-up resistor will be required, and it is advisable to use a Schmitt Trigger input for TTL. Current Transformers To enable the safe and simple measurement of AC current, the KWH-400 unit requires a current transformer to be fitted to each of the three phases. Crompton Instruments offers an extensive range of suitable current transformers offering accurate measurement of AC current and ratio matching to a consistent 5 Amp secondary current, proportional to the primary current. See attached list for standard values. Dimensions

Features

Class 1.0 accuracy Wide operating voltage 85V to 500V L-L 3 phase 3 and 4 wire True RMS measurement 6 digit auto-resettable electro-mechanical counter LED status and diagnostic indicators Pulsed output Fully programmable CT ratios DIP switch settings Fully isolated current input Benefits Replaces the need for rotating disc meters Energy efficiency and awareness Industry standard DIN96 case style Tamper proof Low VA burden

Applications

KWH-400 – DIN Panel Mounted Kilowatt Hour Energy Meter Specification Active Energy Accuracy: Class 1.0 +/- 1.0% of range maximum Auxiliary Supply: Self powered Input Frequency: 45 - 55HZ Nominal Input Voltage: 110V – 400V L-L (63.5 – 230V L-N) Input Voltage Tolerance: 85 - 500V L-L (49 – 288V L-N) Nominal Input Voltage Burden: <8VA Nominal Input Current: 5A Start Up Current: 0.2% of rated current Max Continuous Input Current: 6A Nominal Input Current Burden: <2 VA Power Factor: 0.5 lag – unity – 0.8 lead Current Measurement: 3 x current transformers (not included) System CT Primary Ratios: 5, 10, 20, 30, 40, 50, 60, 75, 100, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 1200, 1250, 1500, 1600, 2000, 3200, 5000A Pulsed Output: Volt free optical Isolator with open collector transistor output Pulse Capacity: 50V DC, <40mA Pulse Duration: >200 milli seconds Counter: 6 digit auto-resetting electro-mechanical Reading Resolution: 1 per kW.h LED Indicator Display: 3 x Green: Voltage phase monitoring 3 x Red: Reverse connected CT warning Pulse Indicator: Red LED flashing at rate proportional to the measured power Enclosure Style: Panel mount to DIN 42700 Enclosure Material: Glass filled polycarbonate Terminals: M4 captive screw clamp Fixing: 2 side clamps Compliant With: IEC 1036. EMC and LVD Operating Temperature: 0 to +55°C Storage Temperature: -10 to +70°C Relative Humidity: 0 .. 95% non condensing Dimensions: 96mm high x 96mm wide x 82mm deep Panel Cut Out: 92mm x 92mm IP Protection: IP54 Weight: 500g approx Product Codes Order Code Description KWH-400-110 3 phase 3 and 4 wire, CT Connected 5A 110V L/L KWH-400-400 3 phase 3 and 4 wire, CT Connected 5A 400V L/L Connections

3 Phase 3 Wire Unbalanced Load 3 Phase 4 Wire Unbalanced Load

It is recommended that all voltage lines are fitted with 1 Amp HRC fuses. For safety reasons, CT secondary connections should be grounded according to local codes of practice. Programming and Scaling The KWH-400 is direct connected up to 500V with 5 Amp CT inputs. The CT ratio is field programmable without any special tools via DIP switches mounted on the underside of the unit behind a tamper proof label. Once the CT ratio has been programmed, the scale factor should be adjusted on the front display. A self- adhesive decimal point can be affixed in the appropriate position on the mechanical counter. CT Ratio DIP Switch Multiplier Setting 43 21 5/5A 1 1 1 1 0.01 10/5A 1 1 1 0 0.1 20/5A 1 1 0 1 0.1 30/5A 1 1 0 0 0.1 40/5A 1 0 1 1 0.1 50/5A 1 1 1 1 0.1 60/5A 1 0 1 0 0.1 75/5A 1 0 0 1 0.1 80/5A 0 1 1 0 0.1 100/5A 1 1 1 0 1 125/5A 0 1 0 0 1 150/5A 1 0 0 0 1 200/5A 1 1 0 1 1 250/5A 0 1 1 1 1 300/5A 1 1 0 0 1 400/5A 1 0 1 1 1 500/5A 1 1 1 1 1 600/5A 1 0 1 0 1 750/5A 1 0 0 1 1 800/5A 0 1 1 0 1 1000/5A 1 1 1 0 10 1200/5A 0 1 0 1 10 1250/5A 0 1 0 0 10 1500/5A 1 0 0 0 10 1600/5A 0 0 1 1 10 2000/5A 1 1 0 1 10 2500/5A 0 1 1 1 10 3000/5A 1 1 0 0 10 3200/5A 1 1 0 1 10 4000/5A 1 0 1 1 10 5000/5A 1 1 1 1 10 + _ PULSE OUTPUT L O A D + _ PULSE OUTPUT N L O A D S1 S2 S1 S2 L1 L2 L3 + _ S1 S2 S1 S2 L1 L2 L3 + _S1 S2 N

Tyco Electronics UK Limited, Crompton Instruments Freebournes Road, Witham, Essex, CM8 3AH, UK Phone: ++44 1376 509 509 Fax: ++44 1376 509 511 © Tyco Electronics EPP KWH UK 11/05 Energy Products – economical solutions for the electrical power industry: cable accessories, connectors & fittings, electrical equipment, instruments, lighting controls, insulators & insulation enhancement and surge arresters. All of the above information, including drawings, illustrations and graphic designs, reflects our present understanding and is to the best of our knowledge and belief correct and reliable. Users, however, should independently evaluate the suitability of each product for the desired application. Under no circumstances does this constitute an assurance of any particular quality or performance. Such an assurance is only provided in the context of our product specifications or explicit contractual arrangements. Our liability for these products is set forth in our standard terms and conditions of sale. CROMPTON is a trademark of Crompton Parkinson Ltd. and is used by Tyco Electronics under licence. Other New Products DIN Panel Meter with Build in Selector Switch

  • Moving iron mechanisms
  • True RMS measurements
  • 72mm or 96mm case styles
  • Slide in dials
  • Terminal covers as standard Integra 1560 - Multifunction Transducer
  • Upto 4 Analogue outputs
  • Options - Profibus, Lonworks, 2 x Modbus, 2 x Pulsed outputs
  • Programmable via software or remote displays
  • Upto 32 electrical & power quality measurements