1. General Description

    TM2 terminal (cabinet) for a high voltage (6KV/10KV) acquisition metering is modularly designed with special dual-isolated and dual-insulated chamber internally, in which an amorphous current transformer with wide range of detection and high precision and good linearity is used. The external design is based on the outdoor standard, it is suitable for severe outdoor environment for resistance of low and high temperature.

    By using a high voltage transformer, 10V voltage between A-B and C-B of primacy side is converted into 100V between a-b and c-b of secondary side proportionally. The high voltage current of A and C of the primary side is converted proportionally into a rated value of 5A current of a and c of the secondary side, the 2 sets of current voltages of the secondary side is linked to 100V of rated voltage for rating the 5A bi-element electric energy meter, for calculating the electric energy, which is multiplied with voltage ratio and current ratio, thus the electric energy value of the high voltage side is obtained.

2. Main Functions

    Detection of Electric Energy: it can  be used for detecting the time-sharing forward and backward active electricity and reactive electricity \power factor\instantaneous electricity (current\voltage\power etc)\time-sharing metering the four-quadrant reactive electric energy.

    Data Storage Function: it is used for data recording with time mark (month\date\hour\minute) , total storage space not less than 2M byte. Data are always kept after electricity is shut off.

Wireless voltmeter checking: The metering unit is internally arranged with RS485, RS232, Bluetooth, GPRS/CDMA communication module; it can meet the demands of wireless voltmeter checking in different distance.

    Indication of Rate of Charges: LED is used in the voltmeter for timing display of rate of the charges rate at present and accumulated electricity.

    For Local and Remote Maintenance: The metering unit can be used for local and remote maintenance, can be used for inquiring practical parameters and real-time data, setting the parameters and on-line programming.

    Monitoring Function: Load Monitoring:When the load is more than a given value, audio and shining alarming and electrical relay output can be set. The events of demands of recent ten times are recorded, such as zero clearing\program\phase failure\excessive voltage\voltage loss\current loss\reverse phase sequence\overload\current imbalance\time calibration\power-failure and power up.

    Interference-resisting Function: Excess DL614-97 and related IEEE standard.

3. Technical Parameters

• Data Accuracy: active power 0.2 order /0.5 order, reactive power one order /two order (option).

• Range of Application:

• Measuring range of wide current: 0.01~200A.

• Range of Operating Voltage: Ue ± 30%.

• Range of Operating Frequency:50HZ ± 10%. .     

• Rated Voltage: 6-10KV.

• Power Consumption: less than 10W.

• Operating Environment: Operating temperature:-30℃~+80℃;

• Humidity :< 85% (20℃±5℃).

• Electromagnetic Compatibility:

• High Frequency Interference: It is consistent with Grade W of 1MHZ pulse train interference resisting experiment regulated in IEC255-22-1 standard and it is also consistent with the standard of interference by 100KHZ pulse train specified in standard IEC1000-4-12.

• Rapid transient disturbance: It is satisfied with the standard of grade W of rapid transient interfering experiment specified standard IEC255-22-4.

• Electrostatic Discharge Interfering: It is conformed to electrostatic discharge experiment specified in grade IV standards of the IEC255-22-2.

• Insulation and High Voltage Resistance:It is consistent with the standard of insulation property, impact voltage and the property of high voltage resistance regulated in standard GB7261.(32KV,60S duration)

• Communication Interface: GPRS/CDMA interface; RS232 or RS485 interface; wireless blue tooth interface.

• Clock Parameter: internal clock error is 0.5S per day.(25℃)

• Mean Time between Failures: Mean Time between Failures≥30000hours.