I.Overview:
Transformer DC resistance is transformer manufacturing of semi-finished products, finished products testing, installation, commissioning test and power sector preventive test will measure project, can effectively find the transformer coil material selection, welding, loose connection parts, short, break the blemish such as manufacturing and running after the existence of hidden dangers.In order to meet the needs of transformer dc resistance rapid measurement, it has developed a new generation of CT series DC resistance tester.
CT88-10B three channel DC resistance tester, dual power source structure three-phase can be simultaneously used to transformer winding Yn tap,measurement system has independent three channels of voltage and current sampling, and it will measure and display three-phase resistance value and three-phase unbalance rate.
II.Function characteristics:
1.Using high precision electronic measuring technology, makes the instrument has high measurement precision and numerical stability, good repeatability.
2.The instrument output large current and the current is automatically selected (3 channel max 10A; Single channel max 20A).
3.Three channels measurement, real-time acquisition, simultaneously measuring three resistance values, and calculating three-phase resistance imbalance.
4.Not only measuring three phases simultaneously, but also testing single channel according to traditional mode, at the same time, it has the function of temperature conversion.
5.It has perfect protection circuit and strong reliability
6.Storage data 20 groups, real-time view..
7. Big screen display, menu operation, friendly interface, be clear at a glance, convenient operation.
8.Micro printer for thermal printer, speed, the surface can be installed directly printing paper.
9.Audible alarm automatic discharge and discharge instructions, and other functions.
III. Technical parameters
1.Output current: Automatic selection current, 3 channel max 10A; single channel max 20A
2.Test range: 0 -100Ω
3.Acuuracy: 0.2%±0.5μΩ
4.Resolution:0.1µΩ
5.Operation temeprature:-20~50℃
6.Humidity: <90% No condensation
7.Power supply:AC220V±10%,(50±1)Hz
8.Size: 330*230*270mm
9.Weight: 10kgs
IV. Panel
1. Grounding
2. Printer: print test results.
3. USB: upload test data to USB disk or PC through USB interface (optional)
4. Power socket: 220V AC power input socket with 5A fuse.
5. Display: 240x128 dot matrix LCD, display menu, current and resistance value.
6. Reset key: the tester returns to the initial state and cuts off the output current.
7. Power switch
8. Function key: used to indicate the operation of corresponding functions by LCD.
9. Measuring voltage input terminal: VB (V+), Vo (V-) are voltage input channels in conventional single channel measurement.
Three channel measurement, VA, VB, VC and Vo are voltage input channels.
10. Measurement current output terminal: IB and IC are current output channels in
conventional single channel measurement.
IA, IB, IC and IO are current output channels in three channel measurement.
V. Accessaires
1, DC resistance tester............................ 1 unit
2. Special test cable..................................1 set
3. Power supply cable...............................1 unit
4. Fuse......................................................2 units
5. Calibration.............................................1 unit
6. Operating manual..................................1 unit
0.1Hz VLF AC/DC Hipot tester
