美国vanguard EZCT-2000A电流互感器测试仪
美国vanguard EZCT-2000A电流互感器测试仪Current Transformer Test Set
The EZCT-2000A is Vanguard’s third-generation microprocessor-based current transformer test set. The EZCT-2000A can perform the current transformer (CT) excitation test, measure the CT winding resistance and CT current-ratio automatically. All of the EZCT-2000A’s test leads can be connected to the CT output terminals (X1, X2, X3, X4 and X5), eliminating the need for lead switching during testing. Test voltage output is automatically raised and lowered by the EZCT-2000A without any operator intervention. With up to 2000 Vac excitation test voltage available, the EZCT-2000A can easily perform excitation tests on very large CT’s.
Perform Saturation, Ratio and Polarity Tests
Perform CT Winding Resistance Test
Fully Automated
Test record header information including company, substation name, circuit ID, manufacturer, CT serial number, operator name, and test record-comments
Plot Multiple Saturation Curves
Store 140 Records (of 10 Saturation Curves)
Computer Interface
USB Flash drive interface
EZCT-2000A
Cables

Cable Part Number
[8000-0005] USB Cable 8000-0005
[8000-0006] RS-232C Cable 8000-0006
[8000-0016] Power + Ground Combination Cable 8000-0016
[8000-0105] H Cable Set (Metal Type) 8000-0105
[8000-0108] X Cable Set 8000-0108
[8000-0143] EZCT H Cable Set (Plastic Type) 8000-0143
[8000-0157] EZCT H Cable Set (with Banana Jacks) 8000-0157
EZCT-2000A
Technical Specifications

TYPE Portable current-transformer test set
PHYSICAL SPECIFICATIONS 16.8”W x 12.6”H x 14”D (42.7 cm x 32.0 cm x 35.6 cm); Weight: 60 lbs (27.2 Kg)
INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60 Hz
MEASUREMENT METHOD ANSI/IEEE C57.12.90, IEC 60044-1 and ANSI/IEEE C57.13.1
OUTPUT TEST VOLTAGES 0 – 50 Vac @ 10A max,
0 – 300 Vac @ 10A max,
0 – 500 Vac @ 5A max,
0 – 1200 Vac @ 2A max,
0 – 2000 Vac @ 1.2 A max
VOLTAGE READING RANGE 0 – 2,200 Vac; Accuracy: ±1.0% of reading, ±1 volt
CURRENT READING RANGE 0 – 10A; Accuracy: ±1.0% of reading, ±0.02A
CURRENT-RATIO RANGE 0.8 – 999: 0.1%, 1000 – 1999: 0.3%, 2000 – 5000: 1%
PHASE ANGLE MEASUREMENT 0 – 360 degrees; Accuracy: ±1.0 degree
RESISTANCE READING RANGE 100 micro-ohms – 10 ohms; Accuracy: 2% of reading, ±1 count, ±10 μ-ohms
DISPLAY Back-lit LCD Screen (240 x 128 dot graphic; 114mm x 64mm); viewable in bright sunlight and low-light levels
PRINTER Built-in 4.5-inch wide thermal printer
COMPUTER INTERFACES One RS-232C port (115k baud), One USB port
EXTERNAL DATA STORAGE One USB Flash drive interface port
(Flash drive not included)
PC SOFTWARE WINOOWs XP/Vista-based CT Analysis software is included with purchase price
INTERNAL TEST RECORD STORAGE Stores 140 test records. Each test record may contain up to 10 sets of excitation, resistance and ratio data
INTERNAL TEST PLAN STORAGE Stores 128 test plans. Each test plan can store 10 excitation test voltage and current settings
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92 standards
ENVIRONMENT Operating: -10 to 50 C (15F to +122 F);
Storage: -30 C to 70 C (-22F to +158 F)
CABLES Five 20-foot X cable sets, One 35-foot H cable set, power cord, One cable-carrying duffel bag
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25C (+77F).
Last updated on February 10, 2010
Related Knowledgebase Items

Problem DeSCRJPTion Probable Cause Suggested Solution
When running the excitation test, the Vx voltage is always zero. The excitation current can be raised during a test.
The EZCT-2000A X cables are driving a short circuit.
Check CT shorting screws
Check X lead connections.
When running the excitation test, the Vx voltage can be raised but the excitation current is always zero during a test.
The EZCT-2000A X cable is driving an opened circuit.
Check the CT terminal connection.
产品详细说明：
 
特点
l CT励磁曲线测试，根据ANSI/IEEE C57.13.1及IEC60044-1测试标准
l 得到励磁曲线及转折点电压。
l 匝比与极性测试，系根据ANSI/IEEE C57.12.90测试标准
l 绕组电阻测试（限EZCT-2000机型）。
l 4.5英寸热感式打印机。
l 具RS-232C与USB界面。
l 4×20字符，背光LCD。
存储测试记录，包括励磁曲线、极性及匝比测试数据。
 
技术指标
机型
EZCT
EZCT 2000
测量标准
ANSI/IEEE C57.12.90， IEC60044-1，ANSI/IEEE C57.13.1
输出电压
0~50Vac/ 2Amax
0~200Vac/2Amax
0~1200Vac /5Amax
0~50Vac /10Amax
0~300Vac /10Amax
0~500Vac/5Amax
0~1200Vac /2Amax
0~2000Vac /1.2Amax
电压范围
0~1250Vac（精度：±1%读值、±0.5V）
0~2200Vac（精度：±1%读值、±1V）
电值范围
0~10A（精度：±1%读值、±0.01A）(EZCT)
0~10A（精度：±1%读值、±0.02A）
匝比测试精度
0.8~99：±0.5%
100~999：±1.0%
1000~5000：±2%
0.8~999：±0.1%
1000~1999：±0.3%
2000~5000：±1%
相位范围
0°~360°(精度：±1°)
PC软件
WINOOWs98/XP兼容，标准附件
WINOOWs XP兼容，标准附件
测试结果存储
储存128笔(EZCT)/140笔测试纪录每笔纪录包含10组励磁电流与匝比数据
测试存储
储存10笔标题纪录
安规
UL61010A-1、CAN/CSA认证（C22.2No.1010-92）