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三相電能表現場校準儀專為高壓電網計量設備的現場檢測和故障排查設計。該儀器采用高精度內置變壓器和鉗型變壓器進行采樣，使操作人員能夠快速、安全、可靠地測量電能表記錄誤差和接線錯誤。它為電力系統檢查員提供了一個有效的基礎，用于檢查竊電和漏電、發現計量裝置故障、準確測量并恢復電量。

HZ-3521A三相電能表現場校準儀采用當前流行的ARM處理器，主頻168M，內存128M，擴展4G內存卡。LCD采用7英寸高清彩色觸摸屏，結合emwin顯示界面，使得儀器界面友好且操作簡單，可以全屏觸摸操作而無需鍵盤。儀器支持文件系統，可無縫連接到計算機。

功能與特點：

2.1 在不斷電的情況下，無需改變計量電路的接線，即可檢測計量裝置的誤差，以確定計量裝置是否故障。

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

2.3 可測量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，可以直觀檢查計量裝置的接線錯誤。

2.5 使用鉗型變壓器測量電流回路，允許操作人員快速、輕松、安全、可靠地進行測量，而無需打開電流回路。

2.6 不改變接線即可檢測無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。儀器可以同時或分別顯示每個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 內置emwin操作系統，7英寸真彩LCD顯示屏，無鍵盤全觸摸操作，一個屏幕可以顯示多種電氣參數。

輸入特性：

3.輸入特性
電壓：2～450V自動轉換限值
鉗型電流互感器測量范圍：0.1～5A（20A、100A、500A可選）
相位角：0～359.9o
頻率：45～55Hz
3.2 準確度：0.05
3.3 工作溫度：-20℃～+50℃
3.4 工作電源：80V～265VAC
機器功耗：≤3VA
3.5 尺寸：長度：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機殼的絕緣電阻≥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。