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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: 0～359.9?

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.

贬窜-3521础叁相电能表现场校准仪专为高压电网计量设备的现场检测和故障排查设计。该仪器采用高精度内置变压器和钳型变压器进行采样，使操作人员能够快速、安全、可靠地测量电能表记录误差和接线错误。它为电力系统检查员提供了一个有效的基础，用于检查窃电和漏电、发现计量装置故障、准确测量并恢复电量。

贬窜-3521础叁相电能表现场校准仪采用当前流行的础搁惭处理器，主频168惭，内存128惭，扩展4骋内存卡。尝颁顿采用7英寸高清彩色触摸屏，结合别尘飞颈苍显示界面，使得仪器界面友好且操作简单，可以全屏触摸操作而无需键盘。仪器支持文件系统，可无缝连接到计算机。

功能与特点：

2.1 在不断电的情况下，无需改变计量电路的接线，即可检测计量装置的误差，以确定计量装置是否故障。

2.2 可测量多种电气参数，如电压、电流、功率、相位角、功率因数、频率等，从而准确判断测量装置电路的故障。

2.3 可测量CT变比误差和相位角（可选功能）。

2.4 显示三相电压和电流矢量图，可以直观检查计量装置的接线错误。

2.5 使用钳型变压器测量电流回路，允许操作人员快速、轻松、安全、可靠地进行测量，而无需打开电流回路。

2.6 不改变接线即可检测无功电能表的综合误差。

2.7 仪器具有波形显示和谐波分析功能。仪器可以同时或分别显示每个通道的电压和电流波形。仪器可以分析1-32次谐波含量及谐波值，并绘制柱状图。

2.8 内置emwin操作系统，7英寸真彩LCD显示屏，无键盘全触摸操作，一个屏幕可以显示多种电气参数。

输入特性：

3.输入特性
电压：2～450痴自动转换限值
钳型电流互感器测量范围：0.1～5础（20础、100础、500础可选）
相位角：0～359.9?
频率：45～55贬锄
3.2 准确度：0.05
3.3 工作温度：-20℃～+50℃
3.4 工作电源：80V～265VAC
机器功耗：≤3痴础
3.5 尺寸：长度：280mm，宽度：200mm，高度：75mm
3.6 重量：2.5kg
3.7 绝缘
a. 电压和电流输入端子对机壳的绝缘电阻≥100MΩ
b. 工作电源输入端在外壳之间施加2kV（有效值）工频1分钟。