美国meggerTTR310变压器三相变比测试仪
美高尔MWA3xx变压器迷你分析仪说明书
DESCRIPTIONThe Megger MWA3xx Transformer Winding Analyzer is anadvanced 3-phase transformer test system delivering portability, reduced set-up time, increased job-site safety, and effortless productivity. The MWA3xx provides complete ratio, phase and winding resistance measurements for a 3-phase transformer. All ratio and winding resistance tests are performed in one instrument, with only one 3-phase lead-set connection. The MWA3xx utilizes PowerDB as a single software platform saving the user additional time with only one set-up and one easy-to-use test form.The MWA3xx effectively tests:n Power transformers n Distribution transformers nCTs and VTs (PTs)n Motors/generatorsTESTING PERFORMEDThe following tests are easily performed with the MWA3xx, all with one instrument and one 3-phase lead-set connection.n 3-phase turns ratio n 3-phase winding resistancen OLTC/continuity (make-before-break) n 3 phase core demagnetization n Magnetic balance / flux distribution n Excitation currentn Polarity and phase angle deviation n Auto vector detection nHeat-run test3-Phase test connection (no interconnect boxes)3-Phase, 2-Winding Transformers - Resistance on all six windingsOnce connected, the MWA3xx performs DC resistance measurements on all high- and low-side windings withoutreconnection. The test procedure is simple and efficient. Delivering eight-terminal/six-winding resistance measurement capabilitywithout the need for inter-connect boxes saves the user time by testing all six windings without having to disconnect and reconnect leads. The far-end of the measurement cable set is connected to each bushing/terminal of the transformer using a patented adjustable (100 mm – 4 in. opening) Kelvin clamp. This adjustable clamp removes the need for traditional dual leads (I & P) per phase, reducing the connections from 16 to 8 without the worry ofmisconnecting potential (P) for test current (I). The near-end of the cable is connected to the MWA3xx. Selected resistances of bothMWA300/330A3-Phase Ratio and Winding Resistance AnalyzernCombines TTR and resistance testing in one box - faster, more efficient testing n55% smaller, 40% lighter than individual instrumentsnOnly one set of leads required - lighter, smaller and less expensiven One test form - easier, faster to complete n Built-in demagnetizationMWA3xx3-Phase Ratio and Winding Resistance AnalyzerMWA330A with built-in 12-in industrial computer, shown above.HV and LV windings will then be measured. The test sequence can be selected as 6-winding with dual injection simultaneous winding magnetization, up to 4-winding measurement of HV and LV separately, or single-winding test.3-Phase turns ratioComplexity in the measured ratio versus nameplate ratio occurs with most three-phase power transformers due to multipliers, such as √3, which are required to match the measured ratio to the nameplate ratio. Additionally, transformers with zig-zag windings are handled correctly with internal compensation allowing usersto compare nameplate to actual with no corrections needed. The MWA3xx automatically applies the appropriate multiplier which provides a direct comparison to the nameplate ratio.Excitation currentThe excitation current test at low voltage is very useful in locating problems such as defects in magnetic core balance, in magnetic core structure, shifting of windings, failures in the turn-to-turn insulation, or problems in tap changers.Winding balanceWinding balance (also referred to as magnetic balance) is performed to assess the health of the windings, core assembly condition, and flux distribution within the transformer. This test, performed safely and efficiently by the MWA3xx, is a measure of how well balanced (electrically) the transformer is versus nameplate specifications. Check with the factory to ensure your vector group is available with this feature.Phase angle deviationPhase angle deviation is the phase relationship between in-phase vectors of the high-side windings versus the low-side windings. The phase deviation denotes the quality of the core and the winding and should exhibit very low values (0.01 degrees) when the core and windings are functioning properly. Shorted turns, a deteriorated, or damaged core can cause significant changes in the phase deviation values.LTC (OLTC) continuityIn normal LTC operation, continuity between the internal LTC contacts is maintained throughout each complete transition (from one tap position to the next). To check for this continuity, the MWA3xx continually monitors the transition current for each tap position. Any slight discontinuities are detected and reported. Vector recognitionWhen the transformer nameplate data is unavailable, or to confirm compliance to specified nameplate configurations, the MWA3xx provides the capability for automatic vector group detection. PolarityThe MWA3xx quickly and efficiently checks for correct polarity between high and low side windings.Automated heat-run interval testingThe MWA3xx performs automated single or multi-core heat run testing. It uses the standard accepted methods, IEC60076-2-1993 & C57.12.90 2013, for this test, allowing users to perform factory testing automatically. Reports included within software also meets IEEE and IEC standard requirements but does allow manipulation to fit individual customer requirements.Auto core demagnetizationIn order to avoid problems related to core saturation, the MWA3xx comes standard with a core demagnetization function which safely demagnetizes the transformer core after DC testing.PowerDB™ SoftwarePowerDB software provides the unit with a common “user interface” to minimize operator training and provides a seamless interface to the computer application – PowerDB Lite.Two Interface OptionsExternally controlled – MWA300The MWA300 is a “black box” style package that is remote-controlled by PowerDB software running on an external PC (not provided).Built-in 305 mm (12 in.) touch-screen computer –MWA330AThe optional built-in touch-screen computer software provides an industrial, high visibility screen for use on any day – bright or cloudy – and works under the toughest environments. Providing the same test capabilities as the MWA300, the MWA330A comes equipped with an internal computer providing a 305 mm (12 in.) color display with touch-screen interface.FEATURES AND BENEFITSn “One-time” 3-phase connection tests all six windings for faster and safer testing.n No switchbox required, ensuring easier and safer operation.n Unique Kelvin clamps with patented adjustable jaws each open to 100 mm (4-in.) as well as banana plug input for connectionto terminal blocks – no need for special lead sets, and minimal operator error due to lead connections.n Industrial grade 305 mm (12 in.) bright-color touch-screen display available as an option. Usable in direct sunlight, harsh environments – no need for IT intervention, safely stores results and reports.n Checks the contact and timing health of LTC (OLTC) tap changers.n Single-person testing of LTCs is provided standard for use with optional remote tap controller (RTC-1).n PC interface via USB for remote control operation and downloading of test results for ease of use.MWA3xx 3-Phase Ratio and Winding Resistance AnalyzerSPECIFICATIONSInput PowerMWA3xx: 108 to 132 V, (207 to 253 V*), 58 - 62 Hz, 660 VA MWA3XX-47: 207 to 253 V, (108 to 132 V*), 48 - 52 Hz, 660 VA *Input fuse change required - 6.3A fuse for 120 V nominal and 4.0A fuse for 230 V nominal line input.Internal Data StorageMWA330A (built-in computer): up to 100,000 data sets Communication/Control SoftwareMWA3xx: PowerDB LiteMWA330A: Controlled via built-in industiral PC or external customer PC.The MWA330A’s internal computer is designed to control a limited number of Megger instruments including the DELTA4000 as well as the Megger S1 and MIT Series DC insulation testers. EnvironmentalOperating: -10o C to +50o C (14o F to 122o F)Storage: -30o C to +70o C(-22o F to +158o F)Relative Humidity: 0-90% non-condensingCaseRuggedized case (metal/plastic trim) with removable lid andsoft-side pouch with carrying strapSafety/EMC/VibrationConforms to the requirements of:IEC 61010-1:2010ASTMD999.75,IEC 61326-1:2012* (both emissions and immunity)* - see manualDimensions/WeightDimensions290 x 290 x 460 mm (11 x 11 x 18 in.) does not include handles WeightStandard unit: 14.5 kg (32 lbs)Transformer Winding Phase RelationshipANSI C57.12.70-1978CEI/IEC 76-1:1993 and Publication 616:1978AS-2374, Part 4-1982 (Australian Standard)DC Specifications (Winding resistance, LTC/continuity, core demagnetization, heat-run)ResistanceResistance ranges:CurrentRange (A)ResistanceRange (W)Resolution(W)10 A 10 mW to 0.2 W0.00000110 A0.2 W to 2 W0.00011 A100 mW to2 W0.000011 A2W to 20 W0.001100mA 1 m W to 20 W0.0001100mA20 W to 200 W0.0110 mA10 m W to 200 W0.00110 mA200 W to 2000 W0.1Accuracy: ±0.25% Range ±0.25% RdgResolution: Up to 4 digitsExcitation Current SpecificationsRange and Accuracy0 to 500 mA, 3 digit resolution, ±(2% of reading + 1 digit)AC Specifications (Turns Ratio, Winding Balance) Range and Turns Ratio Accuracy:8 V AC:±0.1% (0.8 to 2000)±0.25% (2001 to 4000)±0.35% (4001 to 8000)40 V AC:±0.1% (0.8 to 2000)±0.15% (2001 to 4000)±0.3% (4001 to 10,000)±0.35% (10,001 to 25,000)80 V AC:±0.1% (0.8 to 2000)±0.15% (2001 to 4000)±0.25% (4001 to 10,000)±0.30% (10,001 to 45,000)Phase Specifications (Phase angle deviation, Phase-shift analysis, auto Vector detection)Input voltages: 8, 40, and 80 V ACRange and Accuracy±90 degrees, 2 decimal points for the degree display, or for the centi-radian displayAccuracy: ±3 minutes (from 0.8:1 – 2,000:1)MWA3xx 3-Phase Ratio and Winding Resistance AnalyzerHV Strobe and Leads Cat # 1004-639Length: 18 m (60 ft)Weight: 1.1 kg (2.3 lb)Foam Lined Transit Case Cat # 2005-115Test LeadsNewly designed test leads, shown in image below, are universal and can be used for winding resistance (MTO3XX) or turns ratio (TTR3xx) instruments. Expandable jaws, shown in inset, allow for testing any size transformer.This new design allows tangle and hassle free connection to transformer.Remote Tap ControllerThe RTC-1 is a manually operated remote tap controller designed to provide a more efficient method of controlling (on)load tap changer (LTC) while performing routine tests on power transformers. It removes the need to be physically close to the LTC while testing or to have a second person controlling the LTC while operating the test instrument. A 9 m (30 ft) three-conductor cable is provided to allow proximity to the test instrument while performing testing and advancing tap positions as required throughout the test.OPTIONAL ACCESSORIESAvailable in 9m (30 ft), 18 m (60 ft) and 30 m (100 ft) lengthsONE INTUITIVE, COMPREHENSIVE TEST FORMRATIORESISTANCESALES OFFICE4271 Bronze WayDallas, TX 75237-1019 USA T 1 800 723 2861 (USA only) T +1 214 333 3201F +1 214 331 7399******************MWA3XX_DS_US_V01ISO 9001The word ‘Megger’ is a registered trademark*Please refer to Input Power under Specifications above for details.。
Megger DET2 3 自动地球(地面)测试仪产品说明书
DESCRIPTIONThe Megger® DET2/3 automatic earth (ground) test instrument is robust, compact and designed to measure earth Electrode Resistance and Soil Resistivity. It provides a full range of test methods and excels at the four terminal method of measurement, which eliminates the resistance of the current circuit from the measurement.The DET2/3 is a reliable instrument for use on large or more complex earth systems, which include communications earth systems and difficult test environments. It can be used to test in accordance with BS 7430 (earthing / grounding), BS-EN-62305 (Lightning Protection), IEEE Standard 81 and Railway Applications.Soil Resistivity measurements are used to establish the optimum electrode design and site, as well as archaeological and geological investigations.FEATURESHigh accuracy earth (ground) measurementsThe DET2/3 provides accurate 1 mΩ resolution measurements of earth (ground) electrode resistance.With its microprocessor controlled system it provides a flexible and ‘user-friendly’ approach to earth tests by the provision of excellent error detection capabilities and full test information shown on a large colour display.Test frequency, test voltage and filtering can be quickly and easily adjusted so that adverse conditions, which can influence the test, can be overcome.A wide band of test frequencies, with a resolution of 0.5 Hz, can be used to eliminate errors caused by noise in the earth. The DET2/3 also includes an automatic frequency selection feature that scans for frequencies with the lowest noise level and then runs a test at that frequency.Continuity measurements and bondingn Single resistance range: One fully automatic range from0.01 Ω to 1.0 kΩn Display: Three digit displayn Accuracy: ±3% (±2 digits)n Short circuit current: 200 mA continuity test currentsn Lead null: Lead resistance compensation (NULL) operates witha lead resistance up to 10 ΩTrace display and data storageUtilising the latest processors, the DET2/3 can provide a live trace of its measurements, which graphically shows the amount of noise from the system under test - a powerful diagnostic tool for the expert earth (ground) test engineer.Use of the latest processors and a large internal memory allows for immediate calculations of resistivity (Wenner or Schlumberger method) and the ability to save a complete day’s worth of test results. Test result data can bedownloaded directlythrough a USB flashdrive or straight to aWindows PC runningPowerDB™ software.High resolution of 1 mΩ, ideal for large earth (ground) systemsVersatile test modesHigh accuracy for earth (ground) electrode grid and soil resistivity testsR echargeable battery power that can last all day with a fast re-charge(up to 10 hours)Robust instrument with IP65 protectionAutomatic test frequency selection, with filters and high current featuresDiagnostic trace displayData storageLarge colour display that shows numeric and graphical resultsWeatherproof and ruggedThe DET2/3 is sealed to IP54 standard, which provides weatherproofing during operation (case lid open). When the case lid is closed its protection standard is to IP65 (water and dust damage).The case is made of a tough and light copolymer polypropylene, which can withstand the rough and tumble of outdoor use.Portable powerAn internal Li-ion battery provides for a full day of tests.The Li-ion battery has a fast recharge facility that allows a flat battery to provide an afternoon of tests, if charged during a lunch break.The DET2/3 can also operate from a standard 12 V DC battery supply.SPECIFICATION2, 3 and 4 pole resistance measurementsRange 0.001 Ω to 20.00 kΩ auto range Display Four digit displayAccuracy at 23 °C±0.5% of reading ±2 digits3P±10 mΩ2P±20 mΩOperational uncertainty±2% of reading, ±2 digits(meets IEC61557 operationaluncertainty requirement withreadings over 10 mΩ) whenspike resistances are below100 Ω±5% of reading, ±2 digits ±10 mΩ(meets IEC61557 operationaluncertainty requirement withreadings over 50 mΩ)Test standards BS 7430 (Earthing)BS 62305 (Lightning)BS EN50122 (Railway)IEEE Standard 81Test frequency 2P, 3P & 4P resistivity10 Hz to 200 Hz in steps of 0.5 Hz Test frequency dual clamp, 3p ART & 4P ART70 Hz to 200 Hz (steps of 0.5 Hz) Test current50 mA max.Maximum output voltage Less than 50 V rmsMaximum interference Up to 50 V pk to pk3 and4 pole ART (selective) resistance measurementsRange 0.01 Ω to 10.00 kΩ Auto range Accuracy ±5% of reading ±3 digits at23 °C ±2 °CStakeless resistance measurementRange0.01 Ω to 200 ΩAccuracy ±7% accuracy, ±3 digits @ 128 Hz ContinuityRange0.01 Ω to 1 kΩ (3 digits) Accuracy±3% (±2 digits)Test Current12 V, 205 mALead Null< 10 ΩLeakage currentRange 0.00 A to 2.00 AAccuracy ±5% (±3 digits)Instrument specificationsDisplay 5.25 inch QWVGA, daylightviewable backlit colour Operating temperature and humidity-10 to 40 °C90% RH max at 40 °CStorage temperature-20 to 60 °CTemperature coefficient< ±0.1% per °C over operating tempAltitude Up to 2000 m above sea-level.IP rating IP54 operational (lid open),IP65 storage (lid closed) Measurement rating CAT IV 300 VMeasurement output rating50 V, 50 mA ac (Switching dc) Power supply Internal Li-ion battery orexternal 12-18 V, 65 W, DC supply Battery life Up to 10 hrs useBattery charging time Fast recharge to 50%,3 hrs for 100%Ambient temperature 0 - 40 ºC(battery charge)Safety Meets IEC 61010EMC Meets IEC 61326Dimensions L 315 x W 285 x H 181 mm(12.4 x 11.2 x 7.1 in)Weight 4.5 kg (9.9 lb)Data download To PC through USB 2.0Data storage On board 500 record storagedownloadable as *.txtUSB type A Data download to USB drive USB type B Data download to PC Secondary measurement displayNoise, voltage and current Resistivity calculation Wenner: PE = 2 π a RWSchlumberger:PE = π b (b+a) RaTest modes Internally set 2P, 3P,ART (Selective), 4P,Stakeless (clamp) modesAux inputs MCC1010, MVC1010RoHS compliant YesACCESSORIESMCC1010 and MVC1010n For Stakeless testsn For ART testsCable reels with spiken Sturdy handle and a smooth unwind and wind action n Cable ‘feed through’n20 m, 30 m, 50 m, 60 m or 100 m cablesn Attachable 25 cm (10”) earth spiken Spike can be hammered into the groundn Unique daisy-chain feature to create longer lengths Continuity test cables and clipsn 1.4 m cablesn 2 wire connection cablen Crocodile clipsn ProbesAccessories bagn Holds a full suite of accessoriesn Water resistantn Toughened bottom for outdoor useSALES OFFICE Megger Limited Archcliffe Road Dover CT17 9EN EnglandT +44 (0) 1304 502101 *******************DET23_DS_en_V04ISO 9001The word ‘Megger’ is a registered trademarkDET2/3Advanced earth (ground) testerModel name Cable Reel Language Plug/Mains lead D E T23-E T K-L G-PSELECT A MODELDET2/3EARTH TESTING KITNONEETK 50CXETK 100CORDERING INFORMATIONSELECT A LANGUAGE AND PLUGPlease note only some plug types are available for certain languages - the language you need will determine the mains leads available LANGUAGE PLUG TYPES AVAILABLE3 DIGIT CODE LANGUAGEINCLUDEDUK EU US CH AUS IT IN UK + USLG1 EN, DE, FR, NL P1P2- P4P5 ---LG2EN, ES, PT, IT P1P2P3--P6- - LG3EN, AR, TR, FR P1P2P3--- P7-LG4EN, CZ, SK, PL P1P2 - -----LG5EN, CN, JA, KO P1P2P3--- - P8 LG6EN, RU, HU, RO - P2 - --- - - LG7EN, NO, SV, FI -P2- - -- - -USACCESSORIESOptional accessories Order code Cable reel kit ETK30 1010-176 Cable reel kit ETK50 1010-177 Cable reel kit ETK100 1010-178 Cable reel kit ETK50C 1010-179 Cable reel kit ETK100C 1010-180Optional accessories Order code Clamp MCC1010 1010-516 Clamp MVC1010 1010-518 12 VDC power lead 1010-183 Terminal adapter, detachable retro-fit forC1, P1, P2, C2 connectors 1012-511 Power supply 18V73-5A 1010-793。
变压器变比测试仪的基本介绍
变压器变比测试仪的基本介绍变压器变比测试仪是一种专用仪器，用于测量和验证变压器的变比。
变比是指变压器输入和输出电压之间的比值。
变比测试仪能够提供真实准确的变压器变比数据，以确保变压器的正常运行和性能。
以下是变压器变比测试仪的基本介绍：一、结构和工作原理：变压器变比测试仪主要由测试控制器、合路单元、测试单元、计算机控制系统和显示屏等部分组成。
测试控制器用于控制整个测试过程，合路单元是一个机械装置，用于接通和断开高压和低压侧的电路。
测试单元是一个电子装置，测量输入和输出电压，并计算变比。
计算机控制系统用于控制测试仪的操作，并将测试数据显示在显示屏上。
变压器变比测试仪的工作原理是：首先，将变压器的高压侧和低压侧的接线与测试仪相连；然后，测试仪运行测试程序，通过控制合路单元接通高压和低压侧的电路；接下来，测试单元测量高压和低压侧的电压，并通过计算，得到变比值；最后，计算机控制系统将测试结果显示在显示屏上。
二、测试步骤：使用变压器变比测试仪进行测试时，需要按照以下步骤进行操作：1.将测试仪与变压器的高压侧和低压侧进行连接。
2.打开测试仪的电源，并启动计算机控制系统。
3.在计算机上选择相应的测试程序。
4.根据测试仪的指示，调节合路单元，使高压侧和低压侧的接线连通。
5.开始测试，测试仪将自动测量输入和输出电压，并计算变比。
6.测试完成后，计算机控制系统将测试结果显示在显示屏上。
7.关闭测试仪的电源，断开变压器的接线。
三、功能和特点：1.高精度：测试仪采用先进的电子技术，确保测量结果的高精度和准确性。
2.自动化：测试仪可以自动测量输入和输出电压，并进行计算，提高测试效率。
3.多项测试：测试仪不仅可以测量变比，还可以测试变压器的短路阻抗、负载损耗等性能指标。
4.数据存储：测试仪可以将测试结果保存在计算机中，方便后续分析和比对。
5.易于操作：测试仪具有简洁直观的操作界面，易于操作和控制。
6.可靠性：测试仪采用可靠的材料和工艺，具有较长的使用寿命和稳定的性能。
变压器变比测试仪测试原理_概述说明以及解释
变压器变比测试仪测试原理概述说明以及解释1. 引言1.1 概述变压器是电力系统中常见的设备之一，它通过将电能的电压进行改变，实现输电和配电过程中对电压的调节。
为了确保变压器正常运行，需要对其变比进行测试和监测。
而变压器变比测试仪作为一种专门用于测量变压器变比的设备，在电力系统维护中起着至关重要的作用。
本文主要介绍了变压器变比测试仪的测试原理、使用场景以及工作原理解释，并结合实际应用案例进行分析。
通过深入了解这些内容，读者可以全面掌握变压器变比测试仪的相关知识，提高对于该设备在电力系统维护中的使用效果。
1.2 文章结构本文分为五个部分进行阐述：第一部分为引言部分，主要介绍文章的背景、目的以及整体结构。
第二部分将详细说明变压器基本概念以及变压器变比测试原理。
第三部分对于变压器变比测试仪的工作原理进行解释，并给出相应的方法和注意事项。
第四部分通过具体案例来展示该设备在实际应用中的作用，案例包括变压器安装前的变比测试、定期检测和维护、故障判断中的变比测量等。
最后一部分为结论总结与展望未来发展方向。
1.3 目的本文旨在提供关于变压器变比测试仪测试原理的全面概述和解释，并且通过实际案例进行分析，帮助读者了解该设备在电力系统中的重要性和使用方法。
同时，结合对未来发展方向的展望，促进相关技术的进一步研究和应用。
通过阅读本文，读者将能够掌握变压器变比测试仪的基本原理，能够正确使用该设备并能够有效监测和维护电力系统中的变压器。
2. 变压器变比测试仪测试原理2.1 变压器基本概念变压器是一种电力设备，通过改变电流的大小实现电能从一个线圈传递到另一个线圈。
它由两个或更多的线圈（称为主线圈和副线圈）组成，通过磁场相互作用来传输电能。
2.2 变压器变比测试原理说明变压器的变比是指主线圈和副线圈之间转换的电压和电流之间的比例关系。
变压器变比测试仪用于测量和验证变压器的变比。
在进行变比测试之前，需要连接测试仪与待测的变压器，并确保测试仪正确设置。
三相电量检测仪要点
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50 to 60 Hz
可设定项
口令 1st level 2nd level
数目最大数： 3位 对设定数据进行双重保护
口令 “0”,无保护 口令从 1 -1000, 保护所有设定数据
视在功率 (@ 25°C ± 5°C,
R.H. ≤ 90%) 电度 (@ 25°C ± 5°C,
R.H. ≤ 90%)
谐波 失真 (@ 25°C ± 5°C,
R.H. ≤ 90%) Ib 5A Ib 20A
±2% RDG ±1DGT (sinϕ 1,
0.05Ib至 Imax, 在Un 范围 ;sinϕ 0.5L, sinϕ 0.5C,
S ：按 S 键进入设定界面 △：显设示定模模式式: 向: 向上上翻翻动动各功个能测和量增值加设定值 ▽： 设定模式: 向下翻动功能和增加设定值
显示模式: 向下翻动各个测量值
N-P：新口令，修改新口令
SYS：测量类型选择，3p.n：3相4线，3p：3相3线
Ct.r：电流变比设定（60/5，设定为12）
Ut.r：电压变比设定（低压不设，10KV/100v,设定为100）
P.i.t：功率计算时间设定，1-30分可选
主
Adr：通讯地址可选（0－255） THD:是否检测谐波
菜 Fis：数字过滤设定
单
Fic：显示过滤时间设定 End：结束
RESET TOTAL：重置总电度
RESET PAR： 重置分相电度
version) 自供电或外部电源供电: 230V, 50-60Hz 面板保护等级: IP 40 面板尺寸: 9 DIN模块 RS 422/485 通讯模块输出
全自动变比组别测试仪的使用 测试仪如何操作
全自动变比组别测试仪的使用测试仪如何操作变压器变比全自动测试仪是以单片机为核心进行测量计算和自动掌控，全中文菜单操作界面，具有显示直观、稳定性好、精度高、测量范围宽且现场不需三相电源等优点的变压器变比全自动测试仪是以单片机为核心进行测量计算和自动掌控，全中文菜单操作界面，具有显示直观、稳定性好、精度高、测量范围宽且现场不需三相电源等优点的新一代智能化变比测试仪器。
国标GB1094—79规定：“电力变压器的变压比，除电压在35KV以下且小于3的变压器允许偏差为0.5%”。
对于传统的变比测量方法，大多接受QJ35电桥，其变比测量倍率低，操作繁琐，精度难以保证。
已经不能适应现代测量快节奏，高效率的要求。
变压器全自动变比组别测试仪使用说明1、试品接线：（1）变压器变比组别测试仪若试品为三相变压器，则高压侧对应的A、B、C、0分别接仪器面板的H插座的黄绿红黑四把线夹，低压侧对应接L插座的四把线夹。
若试品无中性点则黑色线夹悬空不接。
若试品为单相变压器，则高压侧与低压侧分别接黄色和黑色的线夹，其他线夹悬空。
注：测“Z”型变压器时，必需将“组别设置”为：“Z” ；将“相别设置”为：“y”在设置“联结组号”。
（2）注意：高压侧引线与低压侧引线要对应好。
严禁接反!（3）插上220V，50HZ的电源线，打开电源开关，此时液晶屏显示主菜单。
2、变压器变比组别测试仪菜单选择：（1）在开机，复位或测量完毕按“F4”键后，屏幕显现主菜单按动功能键“F1—F4”，可分别选择“组别设置、相别设置、参数设置、测试”四个条目。
A、组别设置：进入此功能菜单，可对变压器的各种联接方式进行选择、设置。
B、相别设置：进入此功能可对变压器类别进行设置。
既可设置为单相变压器测试也可设置为三相变压器一相测试，还可以设置为对三相变压器A、B、C三相自动依次测试。
C、参数设置：进入此功能可依据变压器的铭牌标记输入变压器已知参数，例如：分接类型、等分接级、额定变化，以便于仪器自动提示分接位置和变比误差。
METTLER TOLEDO M300系列PH变送器
METTLER TOLEDOM300系列PH变送器1.简介M300 PH变送器是一台具有单测量通道的在线过程控制仪表，用于测量流体的PH值，它可以配合多种不同应用的梅特勒-托利多(METTER TOLEDO)传感器，并能够适应不同长度的连接电缆。
变送器具有同时显示数字和字符能力，带背光的大尺寸四行液晶显示器，可以同时显示测量数据和设置信息，简洁、灵活、清晰的菜单结够使您可以通过面板上的按键对变送器的各项操作参数进行设置，为了避免非法和末经授权的人员对设置进行修改，M300的菜单还设置了分级密码保护的菜单锁，M300变送器配置了两路模拟量输出和四路继电器触点输出，方便在过程控制系统中使用。
M300变送器还具有USB通讯接口和完备的控制指令，可以允许您通过个人电脑（PC）实时采集测量数据或对变送器进行远程监控和设置。
2.当心：本产品为四线制仪表，已使用有源4-20mA模拟输出，请勿向TB2 1~6引脚供电。
3.菜单机构Measurement modeMenu cal infoMenuQulck setupConfigureMeasurementChannel setupTemperaturePHSet averagingAnalog outputsSet poinsAlarm/cleanDisplayHold outputsSystemSet languageUSBPasswordSet/clear lockoutResetPID setupPID A/MTune parametersModePID display setupServiceDiagnostlcsMode/software revisionDigital inputDisplayKeypadMemorySet relaysRead relaysSet analog outputsRead analog outputsCallbrateTech serviceCallInfoMessagesCallbration dateMode/software revision4.操作按键5.菜单树的操作通过键，键，键，进入所需的主菜单。
美国meggerTTR310变压器三相变比测试仪
美国meggerTTR310变压器三相变比测试仪美国meggerTTR310变压器三相变比测试仪美国meggerTTR310变压器三相变比测试仪变压器变比测试仪，是专用于变压器变压比测试的仪器，该仪器电路设计精巧，思路独特，使得其性能优越，功能完善，体积小，重量轻。
该仪器内部采用电子式标准互感器作为测量基准，保证测量精度长期稳定可靠，该仪器具有全自动测量功能，无需设置任何参数即可自动完成三相变比的测量。
变压器变比测试仪接线及注意事项：1．使用仪器时请按本使用说明书接线和操作。
2．接地端子或电源线中的接地端应就近可靠接地。
3．接线时请注意高压侧和低压侧引线不能接反。
4．请注意高压侧有黄、绿、红三色测试线分别对应变压器的A、B、C接线端，低压侧有黄、绿、红三色测试线分别对应变压器的a、b、c接线端，不要接错。
对于单相变压器的测量，使用高压侧A、B和低压侧a、b测试夹。
5．测试前请输入正确设置参数，组别标号和被测变压器必须一致，如不能确定，可使用组别分析或自动测量功能。
6．在测试菜单中“普通型”指一般Y/y、Y/d、D/d、D/y普通联接组变压器，菜单选择和被测变压器必须一致。
7．若不输入额定变比，测试结果可正确显示被测变比值，误差不正确。
变压器变比测试仪主要功能与特点：1．全自动变比测量功能，无需设置任何参数即可自动完成三相变比、和组别标号的测量，轻松操作，一按即可。
2．可自动测量、三相连续测量、单相测量变压器变压比，并可计算变比误差。
3．可测量Y/y、Y/d、D/y、D/d等各种联结组别的变压器。
4．可测量变压器组别标号，尤其适用于未知组别变压器测量。
5．完善的保护功能，具有定量输出过载保护及过电压保护。
6．在激磁电流较大时可自动降低输出电压，以适应低额定电压和大激磁电流的变压器。
7．自动跟踪测量有载开关分接位置，无需重复输入参数。
8．体积小，重量轻，测量准确，速度快。
9．可存储或打印全部测量结果，本仪器内置不掉电存储器和微型打印机，可长期保存测量数据并可随时查阅和打印。
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美国meggerTTR310变压器三相变比测试仪美国meggerTTR310变压器三相变比测试仪美国meggerTTR310变压器三相变比测试仪变压器变比测试仪，是专用于变压器变压比测试的仪器，该仪器电路设计精巧，思路独特，使得其性能优越，功能完善，体积小，重量轻。
该仪器内部采用电子式标准互感器作为测量基准，保证测量精度长期稳定可靠，该仪器具有全自动测量功能，无需设置任何参数即可自动完成三相变比的测量。
变压器变比测试仪接线及注意事项：1．使用仪器时请按本使用说明书接线和操作。
2．接地端子或电源线中的接地端应就近可靠接地。
3．接线时请注意高压侧和低压侧引线不能接反。
4．请注意高压侧有黄、绿、红三色测试线分别对应变压器的A、B、C接线端，低压侧有黄、绿、红三色测试线分别对应变压器的a、b、c接线端，不要接错。
对于单相变压器的测量，使用高压侧A、B和低压侧a、b测试夹。
5．测试前请输入正确设置参数，组别标号和被测变压器必须一致，如不能确定，可使用组别分析或自动测量功能。
6．在测试菜单中“普通型”指一般Y/y、Y/d、D/d、D/y普通联接组变压器，菜单选择和被测变压器必须一致。
7．若不输入额定变比，测试结果可正确显示被测变比值，误差不正确。
变压器变比测试仪主要功能与特点：1．全自动变比测量功能，无需设置任何参数即可自动完成三相变比、和组别标号的测量，轻松操作，一按即可。
2．可自动测量、三相连续测量、单相测量变压器变压比，并可计算变比误差。
3．可测量Y/y、Y/d、D/y、D/d等各种联结组别的变压器。
4．可测量变压器组别标号，尤其适用于未知组别变压器测量。
5．完善的保护功能，具有定量输出过载保护及过电压保护。
6．在激磁电流较大时可自动降低输出电压，以适应低额定电压和大激磁电流的变压器。
7．自动跟踪测量有载开关分接位置，无需重复输入参数。
8．体积小，重量轻，测量准确，速度快。
9．可存储或打印全部测量结果，本仪器内置不掉电存储器和微型打印机，可长期保存测量数据并可随时查阅和打印。
10．具有RS-232接口，可以和计算机通讯,增强数据统计管理功能。
11．不掉电日历，时钟功能。
变压器变比测试仪主要技术指标：1．变比测量范围：0.8—22002．变比测量精度：0.1%±2字（0.8—1000）0.2%±2字(1000—2200) 3．测试电压：AC20Ｖ—220Ｖ4．工作温度：-１０℃—４０℃5．环境湿度：１０%—８５%6．体积：380×260×160mm7．重量：6Kg (不包括测试线)变压器变比测试仪按键设置：本仪器共设有16个按键，作用分述如下。
1．数字键“0-9”：在参数输入状态下，用于输入数据。
在内存查看状态下，“0-3”键用于选则查看一项内存记录的具体数据。
2．小数点键“.”：在参数输入状态下，用于输入小数点。
在内存查看状态下，用于清除全部内存记录。
3．光标移动键“▲”，“▼”：在菜单选择状态下，用于移动光标选择所需菜单项，在多于四个菜单项的菜单选择状态下还具有自动翻屏的作用。
在测量状态下，用于翻屏显示不同的测量数据结果。
在设备编号输入状态下，用于选择0-9直到A-Z字符。
4．“取消”键：在菜单选择及测量状态下，用于取消当前操作，回到上级菜单。
在参数输入状态下，用于取消当前输入位，直至退出输入状态。
5．“确定”键：用于确认当前选择或确认当前输入数据。
6．“复位”键：在任何状态下，按此健将使整机复位并回到初始菜单状态。
美国meggerTTR310变压器三相变比测试仪特点- 全自动测量三相变压器、PT和CT的变比、励磁电流、比差、角差和极性- 仪器内置PowerDB软件，使使用者不需要外接电脑就可以自动控制测试。
- 变比测量范围45000：1，高精确度（0.1%）- 可以选择快速测试和全部（所有分接）测试方式- 显示测量值与铭牌标称值的误差- 能存储200组测试数据，RS232接口能和打印机或电脑连接，方便的进行数据打印或数据传输美国meggerTTR310变压器三相变比测试仪说明该设备可测绕数变比及绕组中的激励电流，适用于电力变压器、电流、电压互感器。
绕数变比读数偏差表示主副线圈芯内有故障。
TTR装置可协助判断：1．线圈短路2．开路回路3．错误连接4．分接开关及变压器中的内部故障或接触缺陷TTR按如下原理工作：无负载的变压器电压比等于实际的绕数变比以及变压器中的主要故障引起主电路阻抗降低，这是由于励磁电流引起的，该电流通过部分额定电压的励磁保持一最小值。
通过满足这两个条件的设计及使用零位平衡系统，变压器的绕数变比能被精确测定。
对配电和电力变压器绕数变比的测定精度可达到0.1%。
本仪器的测试线和外壳的设计使仪器能使用于很恶劣的环境。
PowerDB软件在仪器上面的“PowerDB OnBoard”标志显示在本仪器中内置了PowerDB软件。
PowerDB软件是专为工业设备的控制和数据存储而设计的软件，其有强大的控制和数据管理功能，并且其软件界面非常友好。
操作者使用起来很方便。
TTR330的数据输入和信号的输入，输出都是通过PowerDB软件来控制的，测试所得到的数据会以XML格式保存在内存中，我们可以通过RS232传输端口来打印XML格式的文件，或者把这个文件传输到电脑中。
美国meggerTTR310变压器三相变比测试仪仪器应用本仪器给变压器的高压绕组提供一个电压，然后精确测量低压绕组的电压，这样不仅仅可以得到绕组变比，还能得到励磁电流，角差、比差。
励磁电流TTR提供精确的励磁电流测量，可以精确到01mA，励磁电流的精确测量可以提供详细的为我们提供变压器铁芯的状态。
不必要的环流和无意识的接地会增加励磁电流角差角差是指高压绕组电压与低压绕组电压相量之间的相位角的差值。
判断无负载的PT和CT的精确度等级的一个非常简单的标准是可以对照角差和比差的参数. 一般来说角差值是非常小的。
如果角差值变化很大，那么说明变压器的铁芯可能有损坏或者有毁坏。
本仪器对相角的测量分辨率达到了0.1分，相当于1/600度。
美国meggerTTR310变压器三相变比测试仪特性和优点- 内置PowerDB OnBoard 软件，通过软件的控制可以自动完成所有的测试，并能以XML 格式存储测试数据，供下载或者打印。
- 变比测量范围45000：1，高精确度（0.1%）- 显示测量值与铭牌标称值的误差，可以选择快速测试和全部（所有分接）测试方式- 能存储200组测试数据，RS232接口能和打印机或电脑连接，方便的进行数据打印或数据传输- 仪器带有一个遥控装置，使当只有一个人测试带有载调压装置的变压器的时候能快速操作- 角差的精确测量能快速显示变压器的一些故障，例如线圈短路，铁芯故障- 仪器还有一个快速测试模式提供给使用者能快速的测试单相和三相变压器的比率- 本仪器的测试线和外客的设计使仪器能使用于很恶劣的环境- 仪器上的电脑式键盘能方便使用者快速输入各种参数美国meggerTTR310变压器三相变比测试仪技术参数输入电压单相交流120&230±10%V 100V A可选择电池操作可选用12V车载蓄电池和单相交流120或230V 电源激磁(输出)电压8, 40, or 80 V有效值,自动或手动选择激磁电流范围和精度0 ～500 mA,精度±(2% + 1 位数),3位数字显示相位测量范围和精度±90°,小数点一位为分,小数点两位为度,或弧度显示精度: ±3′变比测试范围和精度8 V: 变比(0.8～2000)±0.1% 变比(2001 ～4000)±0.25% 变比(4, 001 ～8000)±0.35%40 V: 变比(0.8 ～2000)±0.1% 变比(2001 ～4000)±0.15% 变比(4001 ～10,000)±0.3% 变比(10,001 ～25,000)±0.35%80 V: 变比(0.8 to 2000)±0.1% 变比(2001 to4000)±0.15% 变比(4001 to 10,000)±0.25% 变比(10,001 to 45,000)±0.30%测试结果: 五位数字显示打印接口TTR300 :无TTR310 : RS-232TTR320: RS-232TTR330: USB计算机接口TTR300TTR310: RS-232TTR320TTR330: 以太网用户界面TTR300: 无TTR310:5.7吋黑白数字显示,数字小键盘输入TTR320 :5.7吋VGA彩色图像显示,标准键盘和导航键输入TTR330 : 8.4吋VGA彩色试验格式显示,标准键盘和导航键输入内部数据储存TTR310: 存储200个数据TTR320TTR330:储存100000个数据通讯及控制软件PowerDB LITE和PowerDB(版本可选择)TTR330: 随机携带PowerDB相位关系符合ANSI C57.12.70-1978CEI/IEC 76-1:1993 出版物616:1978AS-2374, Part 4-1982 (澳大利亚标准)安全/电磁兼容/防震符合IEC-1010-1, CEASTM D999.75要求Temperature Range温度使用温度: -5° C to 50° C储存温度: -50° C to 60° C相对湿度:0 to 90% 不凝固测试时间: 8～20秒根据变压器的运作方式和类型测试方式ANSI/IEEE C57.12.90尺寸: 216 H x 546.1 W x 330.2 D mm重量:(不包括测试线)TTR300: 9.1 kgTTR310: 10.4 kgTTR320: 11.3 kgTTR330: 11.3 kg。