HZ-3521A

Three-phase Electric Energy Meter Field Calibrator

User Manual

Contents

I.Overview

II.Functions and Features

III.Input Characteristics

IV.Panel Description

V.Wiring Method

VI.Method of Use

VII.After-sales Service

I.Overview

HZ-3521A three-phase watt-hour meter field calibrator is specially designed for on-site inspection of high-voltage power grid metering devices and fault detection. The instrument USES high-precision internal transformer and clamp type transformer for sampling, so that operators can quickly, safely and reliably measure meter recording errors and wiring errors. It provides an effective basis for electric power system inspectors to check electric theft and leakage, find out the failure of metering device, measure correctly and recover electric quantity.

HZ-3521A three-phase watt-hour meter field calibrator adopts the current popular ARM processor, 168M main frequency 128M memory expend 4G memory card. LCD adopts 7-inch hd color touch screen, combined with emwin display interface, which makes the instrument interface friendly and simple to operate, and can operate with full touch screen without keyboard. The instrument supports a file system that seamlessly connects to the computer.

II.Functions and Features

2.1 In the case of no power failure, without changing the wiring of the metering circuit, the error of the metering device is detected to determine whether the metering device is faulty.

2.2 It can measure a variety of electrical parameters such as voltage, current, power, phase angle, power factor, frequency, etc., so as to accurately determine the fault of the measuring device circuit.

2.3 can measure CT ratio error and phase angle (optional function).

2.4 Display vector diagram of three-phase voltage and current, which can visually check the wiring error of the metering device.

2.5 Current loops are measured using clamp-type transformers, allowing operators to make measurements quickly, easily, safely and reliably without opening the current loop.

2.6 Can not change the wiring to detect the integrated error of the reactive energy meter.

2.7 The instrument has waveform display and harmonic analysis function. The instrument can display the voltage and current waveforms of each channel at the same time or separately. The instrument can analyze the 1-32 harmonic content and harmonic values and draw a column chart.

2.8 Built-in emwin operating system, 7-inch true color LCD display, no keyboard full touch operation, one screen can display a variety of electrical parameters.

III.Input Characteristics

3.1 Input characteristics

Voltage 2～450V automatic conversion limit

Clamp type current transformer measurement range: 0.1～5A (20A, 100A, 500A optional)

Phase angle: 0～359.9o

Frequency: 45 ~ 55Hz

3.2 Accuracy: 0.05

3.3 Working temperature: -20℃～+50℃

3.4 working power: 80V～265VAC

Machine power consumption: ≤3VA

3.5 volume: length: 280mm, width: 200mm, height: 75mm

3.6 weight: 2.5kg

3.7 insulation

a. The insulation resistance of the voltage and current input terminals to the casing is ≥100MΩ

b. The working power input end is subjected to a power frequency of 2kV (effective value) between the outer casings for 1 minute.

IV.Panel Description  

4.1 Panel layout

Ua (yellow), Ub (green), Uc (red) : are terminal buttons of the voltage input loop, and Un (black) is the ground wire.

A, B and C - are three phase input jacks for clamp table A, B and C. Pulse - for calibration pulse input jack, and low frequency pulse output jack. The specific wiring diagram is as follows: +5V -- working power supply of photoelectric head, signal input terminal -- pulse input port of photoelectric head (pulse meter), ground -- working power supply and the same name end of signal input.

HZ-3521A三相電能表現(xiàn)場(chǎng)校準(zhǔn)儀專為高壓電網(wǎng)計(jì)量設(shè)備的現(xiàn)場(chǎng)檢測(cè)和故障排查設(shè)計(jì)。該儀器采用高精度內(nèi)置變壓器和鉗型變壓器進(jìn)行采樣，使操作人員能夠快速、安全、可靠地測(cè)量電能表記錄誤差和接線錯(cuò)誤。它為電力系統(tǒng)檢查員提供了一個(gè)有效的基礎(chǔ)，用于檢查竊電和漏電、發(fā)現(xiàn)計(jì)量裝置故障、準(zhǔn)確測(cè)量并恢復(fù)電量。

HZ-3521A三相電能表現(xiàn)場(chǎng)校準(zhǔn)儀采用當(dāng)前流行的ARM處理器，主頻168M，內(nèi)存128M，擴(kuò)展4G內(nèi)存卡。LCD采用7英寸高清彩色觸摸屏，結(jié)合emwin顯示界面，使得儀器界面友好且操作簡(jiǎn)單，可以全屏觸摸操作而無(wú)需鍵盤。儀器支持文件系統(tǒng)，可無(wú)縫連接到計(jì)算機(jī)。

功能與特點(diǎn)：

2.1 在不斷電的情況下，無(wú)需改變計(jì)量電路的接線，即可檢測(cè)計(jì)量裝置的誤差，以確定計(jì)量裝置是否故障。

2.2 可測(cè)量多種電氣參數(shù)，如電壓、電流、功率、相位角、功率因數(shù)、頻率等，從而準(zhǔn)確判斷測(cè)量裝置電路的故障。

2.3 可測(cè)量CT變比誤差和相位角（可選功能）。

2.4 顯示三相電壓和電流矢量圖，可以直觀檢查計(jì)量裝置的接線錯(cuò)誤。

2.5 使用鉗型變壓器測(cè)量電流回路，允許操作人員快速、輕松、安全、可靠地進(jìn)行測(cè)量，而無(wú)需打開(kāi)電流回路。

2.6 不改變接線即可檢測(cè)無(wú)功電能表的綜合誤差。

2.7 儀器具有波形顯示和諧波分析功能。儀器可以同時(shí)或分別顯示每個(gè)通道的電壓和電流波形。儀器可以分析1-32次諧波含量及諧波值，并繪制柱狀圖。

2.8 內(nèi)置emwin操作系統(tǒng)，7英寸真彩LCD顯示屏，無(wú)鍵盤全觸摸操作，一個(gè)屏幕可以顯示多種電氣參數(shù)。

輸入特性：

3.輸入特性
電壓：2～450V自動(dòng)轉(zhuǎn)換限值
鉗型電流互感器測(cè)量范圍：0.1～5A（20A、100A、500A可選）
相位角：0～359.9o
頻率：45～55Hz
3.2 準(zhǔn)確度：0.05
3.3 工作溫度：-20℃～+50℃
3.4 工作電源：80V～265VAC
機(jī)器功耗：≤3VA
3.5 尺寸：長(zhǎng)度：280mm，寬度：200mm，高度：75mm
3.6 重量：2.5kg
3.7 絕緣
a. 電壓和電流輸入端子對(duì)機(jī)殼的絕緣電阻≥100MΩ
b. 工作電源輸入端在外殼之間施加2kV（有效值）工頻1分鐘。