UPA-1 is a mobile device, which could be easily transported to a required testing location.
UPA-1 operates on the principle of varying the power in the primary circuit of the matching power transformer and, respectively, varying the output current, flowing through the automatic circuit breaker under the test. Power regulation could be done either through an external regulator (RNO or VR) or through a built-in thyristor controller.
- Technical Specifications
- Operating Conditions
The device is designed for an indoors operation under the following conditions:
| Condition |
Value |
| Air temperature, °С |
from -10 to +40
|
Relative humidity, %, up to
|
85 at +25° С |
Atmospheric pressure, kPa (mm hg)
|
84,0 – 106,7 (630 – 800) |
| Characteristic |
Value |
Single-phase AC power supply voltage, V
|
220±22
|
Power supply frequency, Hz
|
50±1 |
| Maximum output current when powered from 220 V AC circuit, kA |
1,2 |
| Test current measurement range, kA |
0,10...1 |
Reduced error of the test current measurement, %
|
±3 |
Absolute error of the current flowing time and the switching off time measurement in the range from 50 ms to 990 ms, ms, max
|
±20 |
| Reduced error of the current flowing time and the switching off time measurement in the range from 1 s to 7200 s, %, max |
±3 |
| Continuous running time under the maximum current, s, min |
10 |
| Maximum consumed power, kVA |
5 |
| Net weight of IT-1 (current supply), kg, max |
13
|
| Net weight of the control unit (without flexible busbars), kg, max |
3
|
| Net weight of the flexible busbar (length 1 m, cross-section 110 mm2), kg, max |
1,2
|
| Dimensions of the control unit, mm, max |
340х210х140 |
| Dimensions of the IT-1, mm, max |
250х220х115 |
| Lifespan, years, avg |
10
|
|