C.T. Testing Unit
| FEATURES | |
| • | Microprocessor controlled |
| • | Self zero check and calibration check |
| • | Digital display of %input, ratio error and phase error |
| • | Manual and auto ranging modes |
| • | Test 5A and 1A CT with either 1A or 5A reference CT |
| • | RS 232C port and parallel port for printing |
| • | Built in real time clock |
| • | Parameter entry through keyboard |
| ELECTRICAL SPECIFICATIONS | ||
| • | TYPE | SINGLE PHASE |
| • | OPRATING CURRENT | I A / 5A, 0.5VA |
| • | AUXILIARY SUPPLY | 110V/240V,AC ±20%, 50/60Hz, 60VA. |
| • | ACCURACY | ± 0.5% of reading ±1 % of range |
| • | FREQUENCY | 45Hz to 55Hz or 55Hz to 65Hz. |
| • | ERROR RANGES | 20% (±19.99% ratio error and (±19.99cR* or 680mins.phase error)) |
| 2% (±1.999% and (±1.999cR or 68.0 mins.)) | ||
| 0.2% (±1999ppm and (±1999µR or 6.80 mins.)) | ||
| (cR = Centiradians, µR = Microradians, ppm = Parts Per Million). | ||
| • | RESOLUTION | 0.05% of range |
| • | MEASURING TIME | 7 seconds irrespective of signal level and error range. |
| • | OUTPUTS | RS232C port & Parallel port (data in ASCII format). |
| • | INSULATION RESISTANCE | Greater than 20 Mohms at 500V. DC. |
| • | DIELECTRIC STRENGTH | 2kV RMS for 1 minute |
| • | OPERATING TEMP. | 0°C to 55°C |
| • | STORAGE TEMP. | -20°C to 70°C |
| • | HUMIDITY | Upto 95% RH. |
| MECHANICAL SPECIFICATIONS | ||
| • | MODEL | CTU |
| • | SIZE | 180x320x450mm |
| • | WEIGHT (Appro.) | 8.0Kgs |
| KEYBOARD CONTROLS | |
| 0 - 9 | Numeric keys to enter values. |
| • | Decimal point. |
| ENT | Enter key |
| RTC | Enter date and time. |
| SR / VA | Enter serial no. and burden. |
| Take printout of error readings. | |
| SER | Send data to serial port. |
| % / ACT | Display input in percentage or actual value. |
| DEG/RAD | Display phase error in minutes or centiradians. |
| ZERO | Check auto zero. |
| CAL | Test self calibration. |
| DISPLAYS AND INDICATIONS | |
| • | 4 digit LED display each to display input, ratio error and phase error. |
| • | LED indications for following quantities |
| 1) % Input | |
| 2) Minutes and centiradians. | |
| 3) Range for 20%, 2%, 0,2% and Auto | |
| 4) Balance, overrange, zero and calibration. | |
| PRINTING | |
| Date, time, serial no., input (% or actual value), burden, %ratio error, & phase error (minutes or centiradians). |
|
| Ordering information |
| 1) Type 2) Model 3) Operating current 4)Operating Frequency 5)Auxiliary supply |