Three phase energy meter test equipment

Three phase energy meter test bench 1. Brief Introduction: KP-S30xxx-B three-phase stationary test bench is designed for testing three-phase energy meters accuracy below 0.2, especially for testing Closed I-P Links three-phase energy meters. Test bench can generate 3-phase voltage, 3-phase current and any power factor signal for tested meter, the reference meters accuracy is class 0.05(0.1). 2. Advantages: l. DDS technology signal generator: The signal generator adopts digital sine wave composing technology. The signal generator can trace the voltage phase and supply a dummy load to the tested meter by outputting adjustable current with different phase; m. High efficiency D-Class current amplifier and voltage amplifier: The equipment use PWM power amplifier(or we called D-Class amplifier), which is high efficiency (>85%) and very low heat consumption. The amplifier has protection circuit itself, it can avoid damage due to wrong connection or other manual operations. Current amplifier and shifter can output any current from 0.001A to 100A; Voltage amplifier can output any voltage from 50V to 450V; n. DSP+MCU dual processor designed multifunction reference meter. The reference meter use one DSP to sample the signal of three phase voltage and three phase current, it sample the voltage waveform and current waveform continuously, even there are harmonic exist in the waveform, the reference meter can also measure the voltage/current/power in dependable status; And other MCU is designed to display the tested result and receive input information. o. DCS framework designed error calculator system. The error calculator system is designed as DCS framework, every meter position has one isolated error calculator, error data is transferred from RS485 Bus, PC can receive every meters error data and then displayed it on the screen, the error calculator can receive signal which due to TTL / OC or Optical head output. p. Can be controlled from keyboard or software. The equipment has operated keyboard itself, the equipment can be operated form software and also it can be operated from keyboard. Without PC you can also test meters error. 3. Technical specification: Power and consumption: Power supply: 1P2W 220V ±10%, 50Hz or 60Hz; Or (3P4W 3x220V±10%) Max consumption: 1800VA (8 meter positions) Specification of phantom load power source: Current source: Current Output: 3×0.001A(AC) - 3×100A(AC) Resolving power: 0.01% (min. 0.0001A) Phase shift range: 0 3600 ; Resolving power: 0.10 Output frequency: 45Hz 65Hz ; Resolving power: 0.01 Hz THD(sine wave output): <0.5% Stability of current during sine wave output: 0.05% (180s) Output wave: sine wave 2-21 harmonic wave, total should be less than 40% Odd harmonic waveform Sub harmonic waveform Output capacity: 50VA per meter position Voltage source: Voltage Output: 3×50V(AC) - 3×400V(AC) Load: The Load can be resistor / inductive / capacitive(<4uF) Resolving power: 0.01% (min. 0.1V) Output frequency: 45Hz 65Hz; THD (sine wave output): <0.5% Voltage stability of power source during sine wave output: 0.05% (180s) Output wave: sine wave 2-21 harmonic wave, total should be less than 40% Output capacity: 20VA per meter position Reference Meter: Power and consumption: Power supply: 1P2W 220V ±10%, 50Hz or 60Hz; Max consumption: 30VA Voltage input: 3×30V-3×480V (AC) Current input: 3×0.001A-3×120A (AC) Accuracy: Active power: 0.05% (PF>0.5) Reactive power: 0.1% (PF>0.5) Warm up time: < 2 minutes Dimension: 482mm X 380mm X 140mm Weight: <7.5Kg Error Calculator: Impulse of tested meter could be: TTL / OC / Optical head Max frequency of impulse could be: 200Hz Error display range: ±0.001% -±99.99% 4. About software: a. Error test; b. Starting UP test; c. Creep test; 20 d. Deviation test; e. Harmonic Influence test; f. Voltage variation Influence test; g. Frequency variation Influence test; h. 24H error variation; i. Report output; j. Error data to Excel table.