TD3650 Three-phase Energy Meters Verification Device

1. Summary

TD3650 is a new-generation comprehensive three-phase energy meter testing device designed to meet the requirements of OIML R46, the new Chinese national standard GB/T 17215.211, the type evaluation outline JJF 1245-2019, and the latest technical specifications for smart meters from State Grid and China Southern Power Grid.

It mainly consists of a three-phase precision standard power source, a multi-position meter test bench, a control console, an optional computer, and dedicated software. Available in two accuracy classes—0.02 and 0.05—it supports fully automatic simultaneous verification of 3 to 16 three-phase electronic energy meters, smart meters, or IoT meters with identical voltage/current ranges but different meter constants.

2. Features

2.1 Basic Features

• Maximum Output Capacity: 576 V / 120 A, with fundamental frequency ranging from 45 Hz to 100 Hz.

• Minimum Current Output: As low as 0.2 mA, meeting the starting test requirements for Class D/E energy meters with Imax of 1.2 A.

• Three-Phase Power Adjustment: Supports both unified and per-phase adjustment of voltage and current outputs. Fully automatic range switching and load matching simplify testing.

• Multifunctional Energy Measurement: Supports measurement of forward and reverse active energy, reactive energy, and other energy types.

• Harmonic Output Function: Supports 2nd to 63rd harmonics at 50 Hz / 60 Hz. Harmonic amplitude and phase are programmable, enabling high-order harmonic scanning and complex waveform testing.

• High-Order Harmonic Testing: Built-in testing plans automatically superimpose sweep signals from 15fnom to 40fnom onto the voltage and current circuits, collecting data at each harmonic frequency to evaluate error deviation caused by harmonics.

• Complex Waveform Testing: Preloaded with common waveforms such as square waves, peaked waves, sub-harmonics, and odd harmonics. Custom complex waveforms can also be defined by users for influence quantity testing.

• DC / Even Harmonic Testing: Equipped with the TD3410 half-wave rectification waveform test module to perform DC and even harmonic testing.

• Daily Timing Error Test: Built-in standard time clock tester with a daily timing error limit of ±0.05 s/day.

• Automatic Inspection: Supports automated inspection and auto-short-circuiting of empty meter positions.

• Clamping-Type Wiring: Features a dedicated clamping meter holder compatible with State Grid and Southern Grid meter outlines, allowing for quick and convenient testing. Non-standard meters can be connected via adjustable terminals or manual wiring.

• Communication Interface: Communicates with the meter under test via RS-485 interface, supporting both DL/T 645 and 698 protocols.

• Energy Pulse Sampling: Equipped with both electrical pulse and optical pulse sampling ports.

• Management Platform Interface: Complies with data upload specifications of State Grid and Southern Grid metering production management platforms.

• Multi-Position Test Bench: Available with 3, 6, 12, or 16 meter positions. Each position is equipped with power output, energy pulse, and communication interfaces.

• Mobile Control Console: Features a touchscreen LCD for real-time observation and manual control of output values during testing.

• Dedicated Calibration Software: Supports semi-automatic or fully automatic calibration of the meter under test, with data management and certificate export capabilities. Also features multi-test per point, user-defined test intervals, and automatic plotting of error curves.

• Resume from Breakpoint: In the event of a power outage or reboot, the software can resume testing from the last recorded error point.

• High Reliability: Output channels are well protected with fault detection and recovery capabilities, ensuring excellent maintainability.

2.2 Optional Features

Single and Three-Phase Compatibility: Optional isolated voltage transformers can be added to support single-phase meter testing. Manual wiring is available for single-phase meters. Supports up to 12 meter positions.

CT Isolation: Optional isolated current transformers allow for non-disconnection (non-breaking) testing of energy meters, with support for up to 12 meter positions.

Auxiliary Power Supply: AC/DC 100 V–240 V input, supports auxiliary power line consumption tests and voltage variation tests.

Voltage Power Consumption Test: Optional 1-position voltage consumption test module enables testing of voltage line power consumption.

Current Power Consumption Test: Optional multi-position current consumption test module enables testing of current line power consumption.

Rapid Load Current Switching: Users can set ton and toff durations as well as total test time. Switching between on/off states completes within one nominal frequency cycle, with zero-crossing switching. A single test can run for over 4 hours continuously.

Voltage Dips and Short Interruptions Test: Supports AC voltage dips and short interruptions in voltage supply circuits.

Smart Meter Function Testing: Supports tests for prepaid control, data freezing, key updates, parameter updates, remote control, security authentication, event logging, and communication protocol compliance.

Ground Fault Test: Supports testing under ground fault conditions, including scenarios with a 10% overvoltage. Applicable to three-phase four-wire meters connected to distribution networks with ground fault suppressors or isolated neutral points.

Reference Meter: Optional Class 0.05 / 0.02 standard energy meter or harmonic reference energy meter available.

Harmonic Energy Measurement: Accuracy testing of harmonic energy and harmonic measurement functions using harmonic reference meters.

Bluetooth (Optional): Supports Bluetooth communication in master-slave mode, enabling one-to-one connection with the meter under test.

Optical Probe: Equipped with an optical probe to capture light pulses from energy meters for testing.

3. Verification Items