News - C&I CT/CTPT Smart Meter

Three-phase PTCT Connected Smart Energy Meter is a highly advanced Smart Meter to measure three-phase AC active/reactive energy with frequency of 50/60Hz. It has various sophisticated functions to realize Smart Measurement & Management of energy, with features of high accuracy, excellent sensitivity, good reliability, wide measurement range, low consumption, solid structure and nice appearance, etc.

Main Feature

•  DLMS/COSEM compatible.
•  Measuring & recording import/export active & reactive energy, 4 Quadrants.
•  Measuring, storing & displaying voltage, current, power and power factors, etc.
• LCD display instantaneous current, voltage and active energy with backlight;
• LED indicators: Active energy/Reactive energy/Tampering/Power supply.
• Measuring & storing max demand.
• Multi-tariff measurement function.
• Calendar & Timing function.
• Recording load profile.
• Various anti-tampering functions: cover open, terminal cover open detection, strong magnetic fields detection, etc.
• Recording various events including programming, power failure & tampering, etc.
• Freezing all data in timed, instant, pre-set, daily & hourly mode, etc..
• Automatic scrolling displaying and/or manual-scroll displaying (programmable).
• Backup battery for displaying energy under power-off situation.
• Internal relay to realize load control locally or remotely.
• Communication ports:
• -RS485,

-Optical Communication Port, automatic meter reading;

- GPRS, communication with the Data Concentrator or System Station;

-M-bus, communication with water, gas, heat meter, Handheld Unit, etc.

• Composing AMI (Advanced Metering Infrastructure) solution
• Auto-registration after installing, firmware upgrade remotely

Standards

• IEC62052-11
• IEC62053-22
• IEC62053-23
• IEC62056-42 ” Electricity metering – Data exchange for meter reading, tariff and load control – Part 42:Physical layer services and procedures for connection-oriented asynchronous data exchange”
• IEC62056-46  ”Electricity metering – Data exchange for meter reading, tariff and load control – Part 46: Data link layer using HDLC protocol”
• IEC62056-47 ”Electricity metering – Data exchange for meter reading, tariff and load control – Part 47:COSEM transport layer for IP networks”
• IEC62056-53 ”Electricity metering – Data exchange for meter reading, tariff and load control – Part 53:COSEM Application layer”
• IEC62056-61 ”Electricity metering – Data exchange for meter reading, tariff and load control – Part 61:OBIS Object identification system”
• IEC62056-62  ”Electricity metering – Data exchange for meter reading, tariff and load control – Part 62:Interface classes”

Block Schematic Diagram

The voltage and current from the respective sampling circuit input to the energy metering ASIC. The measurement chip outputs a pulse signal proportional to the measured power to the chip microprocessor. The microprocessor implements the energy measurement and reads the real-time voltage, current and other information.

LED indicators are divided into active energy pulse, reactive energy pulse, alarm and relay condition, which are used to warn the users of the meter’s working condition. The meter contains high precision clock circuit and battery. In normal circumstance the clock circuit is supplied from the power supply while in power-cut condition it automatically switches to the battery to guarantee the clock’s stability and preciseness.