HZ-1041 Three Phase Multifunction Electrical Energy Meter Test Bench

Technical Standards And Regulations

This device complies with the requirements of the following national and industrial standards and related metrological verification regulations :

JJG597-2005 "Verification Regulations for AC Energy Meter Verification Device"

DL460-1992 "Verification Regulations for Electric Energy Meter Verification Device"

GB/T11150-2001 "Electric Energy Meter Inspection Device"

JJG596-2012 "Verification Regulations for Electronic Energy Meters"

JJG307-2006 "Verification Regulations for AC Energy Meters"

DL/T585-1995 "Technical Conditions for Electronic Standard Electric Energy Meter"

Technical Conditions

General Conditions of Use

environmental conditions

Operating environment temperature: 23°C±1°C; Operating ambient humidity: 40%～60%R.H.;

power supply

Single phase: AC220V±10%; Frequency: 50±2.5Hz

technical indicators

2.1 Device accuracy grade: 0.1/ 0.05 grade

2.2 Output voltage:

Range: 3×57.7V/100V/230V/380V;

Adjustment range: 0~120%

Adjustment fineness: better than 0.01%

Output stability: ≤0.05%/3 minutes

Output distortion: ≤0.5%

Output capacity: 20VA/epitope

Load characteristics: resistive, inductive and capacitive

Capacitive load: less than 0.47uF/epitope

Harmonic output: 2~21 harmonics, content ≤40 % ;

2.3 Output current:

Range: 10mA, 0.1A, 0.25A, 1A, 2.5A, 5A, 10A, 25A, 50A, 100A

Adjustment range: 0~120%, maximum output current: 120A

Adjustment fineness: better than 0.01%

Output stability: ≤0.05%/3 minutes

Output distortion: ≤0.5%

Maximum output capacity: 250VA

Load characteristics: resistive, inductive

Starting current output: 1 mA ( minimum), accuracy: ≤5%

Harmonic output:

2~21 harmonics, content ≤40 % ;

Even harmonics (wave group control);

Odd harmonics (SCR waveform);

2.4 Output power:

Stability: ≤0.5%/2 minutes, starting power: accuracy ≤2%;

2. 5 Output phase:

Adjustment range: 0~359.99°, adjustment fineness: 0.01°

2. 6 Output frequency:

Adjustment range: 45~65Hz, adjustment fineness: better than 0.01 Hz

2.7 Device configuration:

Standard energy meter configuration:

Three-phase high-precision standard electric energy meter, accuracy grade: 0.05 grade

Current input range: 10mA~120A; Voltage input range: 40~480V

Number of hanging watches: 16, 32 watch positions

Input and output interface:

Each epitope provides a pulse signal compatible input interface;

Each meter is equipped with a multi-channel pulse selector, providing forward and reverse active and reactive power, demａnd period signal, period switching signal, and clock signal input port;

Each table provides 1 RS-485 communication port

Monitoring Instruments: Readout from Standard Meters

Error handling system:

Configure independent error handlers for each epitope

Error display digits: 6 digits

Pulse miswiring input protection

High precision clock tester: accuracy: 2×10 -7 /S;

Mechanical structure

The table body adopts an all-in-one all-aluminum structure; (1 16-position hanging table rack)

The hanging watch frame is made of aluminum alloy material, and the hanging watch method adopts aluminum alloy plug-in watch holder; )

The table top is made of fireproof and heatproof material, covered with insulating mat;

other:,

The device is equipped with a current terminal for convenient verification

Device configuration high current short wiring

One set of RS-485 lines and one set of multi-function pulse lines are configured for each epitope of the device

The device is equipped with an emergency stop switch

Operation mode: It can be operated by console keyboard or PC

Multi Function Test Items

GPS time synchronization: You can use the 485 broadcast commａnd to provide time, and you can also use the 485 setting commａnd to write the time.

Daily timing error test: It can simultaneously measure the accuracy of second pulse output by multi-function electric energy meters with multiple gauges, and can optionally automatically convert it to daily timing error for display.

Time-period switching error test: For multi-function electric energy meters that output time-period switching signals, the time-period switching error test can be performed, and for multi-function electric energy meters without output switching signals, qualitative time-period switching results can be given according to communication, and also Time synchronization and timing operations can be performed on the multi-function electric energy meter through the communication interface.

485 port communication function: Through the 485 communication port, it is possible to perform operations such as memory power check and parameter setting on the multi-function electric energy meter with a communication port.

Demａnd indication value error test: The device can use the standard electric energy meter method or standard power method to test the demａnd indication value error of the multi-function electric energy meter. The standard electric energy method is used to test the electric energy meter with the output demａnd period signal, and the standard power method is used to test the electric energy meter without the quantity periodic output signal. The average power calculation method during the test can be the slip method or the average power method.

Demａnd periodic error test: When the standard power meter method is used to measure the demａnd indication error, the pulses sent by the standard crystal oscillator within two (interval type) or multiple (slip type) periodic signal intervals of the tested meter are counted by the error meter When the standard electric energy meter method is used to measure the error of the demａnd indication value, it is timed by the internal timer of the error meter.

Combination error test of electric energy meter: change the clock in the meter under test through the RS485 interface, complete the operation of each tariff segment in a relatively short period of time, and calculate the combined error by comparing the total meter and the change amount of each tariff meter . The mechanical scale allows manual input of start and end indications, and can compare the difference between the mechanical scale and the memory.