ODEN AT Primary Current Injection Test System
The ODEN AT primary current injection test system has been specially designed for testing protective relay equipment and circuit breakers. It can also be used to test the turns ratio of current transformers and for other applications that require high variable currents. The ODEN AT can also be set to test circuit breakers with reclosing relays and sectionalisers and is ideal for performing heat runs as the current can be applied continuously or through programmable intervals. It is also capable of testing the integrity of ground grids and safety-ground devices.
The system consists of a control unit with one, two, or three current units. There are three versions of the current unit: S, X, and H. The S and X current units are identical except that the X unit has an additional 30/60 V output. The H unit is rated for even higher current. These current units make it possible to configure the ODEN AT system for a range of different tests.
The control unit has many advanced features, such as a powerful measurement section that can display turns ratio as well as time, voltage, and current. A second measurement channel can also be used to test an additional current or voltage. The ODEN AT can calculate the current transformer turns ratio, impedance, resistance, power, power factor/tan delta, and phase angle.
The current and voltage can be presented as percentages of nominal value. It also has a fast-acting hold function that freezes short-duration readings on the digital display, so when the voltage or contact signal arrives at the 'stop' input, the object under test interrupts the current, or the injection is stopped.
All parts are portable, and the ODEN AT can be quickly assembled and connected.
Ammeter
Measurement method: AC, true RMS (or DC if function is activated)
Inaccuracy: 1% of range ±1 digit
Ammeter 1 (Low/High range)
Ranges:
Current unit S, 0 – 4800 A / 0 –15 kA
Current unit H, 0 – 9600 A / 0 – 30 kA
Current unit X, 0 – 960 A / 0 – 3 kA
Ammeter 2 (Low/High range)
Ranges: 0 – 2.000 A / 0 – 20.00 A
Voltmeter
Measurement method: AC, true RMS (or DC if activated)
Ranges:
0 – 9.999 V
10.00 – 99.99 V
100.0 – 200.0 V
Inaccuracy: 1% of range ±1 digit
Input resistance (Rin):
240 kΩ (range 0 – 200 V)
24 kΩ (other ranges)
Dielectric withstand: 2.5 kV
Timer
Presentation: In seconds, mains frequency cycles or hours and minutes
Ranges:
0.000 – 999.9 s
0 – 9999 cycles
0.001 s – 99 h 59 min
Inaccuracy:
±(1 digit + 0.01% of value)
For the stop condition in INT-mode 1 ms shall be added to the specified measurement error
Stop input
Max. input voltage: 250 V AC / 275 V DC
Phase angle
Range: 0 – 359º
Resolution: 1º
Inaccuracy: ±2º (for voltage and current readings that are higher than 10% of the selected range)
Outptus can be found in the datasheet
