The TRF-250 is Vanguard’s fourth generation transformer turns ratio tester. This latest design provides a higher turns-ratio test voltage of 250Vac, provides a wireless Bluetooth PC interface, and features a 44-key “QWERTY”-style membrane keyboard. All these features greatly improve the accuracy of the turns ratio readings, ease of operation, and reliability.

The TRF-250 determines the turns ratio of the transformer under test using the measurement method. The turns-ratio range is from 0.8 to 50,000 to 1. Transformer turns ratio,? excitation current, and winding polarity are displayed on the built-in 128 x 64 pixels graphic LCD screen. The TRF-250 can be used as a standalone unit or can be computer-controlled.

  • Ratio Range: 0.8 – 50,000 to 1
  • Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
  • 4 test voltages: 4Vac, 40Vac, 100Vac, and 250Vac
  • Phase angle and excitation current measurement
  • Bluetooth and USB PC interfaces
  • 4.5-inch wide thermal printer (optional)

TRF-250是Vanguard的第四代变压器匝数比测试仪。这一设计提供更高的匝数比测试电压250Vac，提供无线蓝牙PC接口，并配有44键“QWERTY”式薄膜键盘。所有这些特性提高了匝数比读数的准确性，操作简便性和可靠性。

TRF-250使用测量方法确定被测变压器的匝数比。匝数比范围为0.8到50,000到1.变压器匝数比，激励电流和绕组极性显示在内置的128 x 64像素图形LCD屏幕上。TRF-250可以作为独立单元使用，也可以由计算机控制。

  • 比率范围：0.8 – 50,000比1
  • 能够检测由ANSI，IEC和澳大利亚标准定义的130种不同的三相变压器类型
  • 4个测试电压：4Vac，40Vac，100Vac和250Vac
  • 相角和激励电流测量
  • 蓝牙和USB PC接口
  • 4.5英寸宽热敏打印机（可选）

全自动三相变压器变比测试仪（测试电压可达250VAC，没有内置电池，热敏打印机为可选项）

产品功能和性能：

主要用来测量变压器绕组的变比、变比误差百分比、极性、相位角和励磁电流。

产品卖点：

1）三相一起接线，但只能一相一相地测量；采用ANSI/IEEE C57.12.90 测试方法；

2）变比测量范围： 0.8 to 50,000 ：1；

3）能自动检测由ANSI、CEI/IEC、澳大利亚标准定义的130种不同的向量组别变压器；

4）有四种测试交流电压可选：4 Vac, 40 Vac, 100 Vac, 250 Vac；

5）可以Excel, XML, 和PDF 格式导出测试报告；

6）内置LTC 控制器；

7）内置热敏打印机（可选项）

8）USB闪存，USB及蓝牙通讯接口；

9）单机或者电脑控制运行。

TRF-250

Cables

CablePart Number
[8000-0005] USB Cable [ 6′ (1.83m) ]8000-0005
[8000-0009] H Single Phase Cable [ 15′ (4.57m) ]8000-0009
[8000-0010] H Extension Cable [ 25′ (7.62m) ]8000-0010
[8000-0011] X Single Phase Cable [ 15′ (4.57m) ]8000-0011
[8000-0012] X Extension Cable [ 25′ (7.62m) ]8000-0012
[8000-0013] H 3-Phase Cable [ 15′ (4.57m) ]8000-0013
[8000-0014] X 3-Phase Cable [ 15′ (4.57m) ]8000-0014
[8000-0015] LTC Control Cable [ 15′ (4.57m) ]8000-0015
[8000-0016] Power + Ground Combination Cable8000-0016
[8000-0186] 3-Phase H Cable [ 30′ (9.14m) ]8000-0186
[8000-0187] 3-Phase X Cable [ 30′ (9.14m) ]8000-0187
[8000-0188] Single-Phase H Cable [ 30′ (9.14m) ]8000-0188
[8000-0189] Single-Phase X Cable [ 30′ (9.14m) ]8000-0189

TRF-250

Technical Specifications

TYPEPortable, lightweight, automatic 3-phase transformer turns-ratio meter
PHYSICAL SPECIFICATIONS18”W x 5”H x 12”D (45.7 cm x 12.7 cm x 30.5 cm ); Weight: 20 lbs (9.1 kg)
OPERATING VOLTAGE100 – 240 Vac, 50/60 Hz
TURNS-RATIO MEASURING RANGE0.8 – 50,000 to 1
TURNS-RATIO ACCURACY0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.25%, 4,000 – 14,999: ±1%, 15,000 – 50,000: ±2% @ 4 Vac
0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.20%, 4,000 – 14,999: ±1%, 15,000 – 50,000: ±1.5% @ 40 Vac
0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.20%. 4,000 – 14,999: ±1%, 15,000 – 50,000: ±1.5% @ 100 Vac
0.8 – 1,999: ±0.1%, 2,000 – 3,999: ±0.15%. 4,000 – 14,999: ±0.8%, 15,000 – 50,000: ±1.2% @ 250 Vac
TEST VOLTAGES4 Vac @ 1 Amp, 40 Vac @ 200 mA, 100 Vac @ 100 mA, 250 Vac @ 50 mA
EXCITATION CURRENT READING RANGE0 – 2 Amperes; Accuracy: ±0.1 mA, ±2% of reading (±1 mA)
PHASE-ANGLE MEASUREMENT0 – 360 degrees; Accuracy: ±0.2 degree ( ±1 digit)
DISPLAYBack-lit LCD screen (128 x 64 pixels) viewable in bright sunlight and low-light levels
PRINTEROptional built-in 4.5-inch wide thermal printer
COMPUTER INTERFACESBluetooth, USB port
EXTERNAL DATA STORAGEOne USB Flash drive interface port; Up to 999 transformer test records can be stored on a USB Flash drive (not included)
INTERNAL TEST RECORD STORAGECan store 112 transformer test records internally. Each record holds the test record header and up to 99 readings.
INTERNAL TEST PLAN STORAGECan store 128 transformer test plans internally. Test plans can be transferred to the unit from the PC via Bluetooth/USB port or via the USB Flash drive interface
PC SOFTWAREWindows-based Transformer Turns Ratio Analyzer application is included with purchase price
LOAD TAP CHANGER CONTACT240 Vac, 2 Amps
ENVIRONMENTOperating: -10? to 50? C (15? to +122? F); Storage: -30? C to 70? C (-22? to +158? F)
CABLESOne 15-foot (4.57m) single-phase set, one 15-foot (4.57m) 3-phase set, one 25-foot (7.62m) extension set, one safety ground, one USB, cable bag
OPTIONSTransportation case
WARRANTYOne year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25?C (+77?F).

TRF-250

电缆

电缆零件号
[8000-0005] USB线[6’（1.83m）]8000-0005
[8000-0009] H单相电缆[15’（4.57m）]8000-0009
[8000-0010] H延长线[25’（7.62m）]8000-0010
[8000-0011] X单相电缆[15’（4.57m）]8000-0011
[8000-0012] X延长线[25’（7.62m）]8000-0012
[8000-0013] H三相电缆[15’（4.57m）]8000-0013
[8000-0014] X三相电缆[15’（4.57m）]8000-0014
[8000-0015] LTC控制电缆[15’（4.57m）]8000-0015
[8000-0016]电源+接地组合电缆8000-0016
[8000-0186]三相H电缆[30’（9.14m）]8000-0186
[8000-0187]三相X电缆[30’（9.14m）]8000-0187
[8000-0188]单相H电缆[30’（9.14m）]8000-0188
[8000-0189]单相X电缆[30’（9.14m）]8000-0189

TRF-250

技术规格

类型便携式轻型自动三相变压器匝数比计
物理规格18“W×5”×12×D（45.7cm×12.7cm×30.5cm）;?重量：20磅（9.1千克）
工作电压100 – 240 Vac，50/60 Hz
TURNS-RATIO测量范围0.8 – 50,000比1
TURNS-RATIO准确度0.8 – 1,999：±0.1％，2,000 – 3,999：±0.25％，4,000 – 14,999：±1％，15,000 – 50,000：±2％@ 4 Vac
0.8 – 1,999：±0.1％，2,000 – 3,999：±0.20％， 4,000 – 14,999：±1％，15,000-50,000：±1.5％@ 40 Vac
0.8 – 1,999：±0.1％，2,000 – 3,999：±0.20％。4,000-14,999：±1％，15,000-50,000：±1.5％@ 100 Vac
0.8-1,999：±0.1％，2,000-3,999：±0.15％。4,000 – 14,999：±0.8％，15,000 – 50,000：±1.2％@ 250 Vac
测试电压4 Vac @ 1 Amp，40 Vac @ 200 mA，100 Vac @ 100 mA，250 Vac @ 50 mA
激动的当前阅读范围0 – 2安培;?精度：±0.1 mA，读数的±2％（±1 mA）
相角测量0 – 360度;?精度：±0.2度（±1位）
显示背光液晶显示屏（128 x 64像素）可在明亮的阳光和低光照条件下观看
打印机可选内置4.5英寸宽热敏打印机
计算机接口蓝牙，USB端口
外部数据存储一个USB闪存盘接口;?USB闪存盘上可存储多达999个变压器测试记录（不包括在内）
内部测试记录存储可在内部存储112个变压器测试记录。每条记录都包含测试记录标题和最多99个读数。
内部测试计划存储可在内部存储128个变压器测试计划。测试计划可以通过蓝牙/ USB端口或通过USB闪存驱动器接口从PC传输到设备
PC软件基于Windows的Transformer Turns Ratio Analyzer应用程序包含在购买价格中
LOAD TAP CHANGER CONTACT240 Vac，2 Amps
环境工作温度：-10?至50?C（15?至+122?F）;?储存：-30?C至70?C（-22?至+158?F）
电缆一个15英尺（4.57米）单相装置，一个15英尺（4.57米）三相装置，一个25英尺（7.62米）扩展装置，一个安全接地，一个USB，电缆袋
OPTIONS运输案例
保证零件和人工一年
规格在标称电压和环境温度+25?C（+77?F）下有效。