System designation | An ODEN AT-system consists of a control unit and one, two or three current units. There are three different versions of the current units: S-unit (standard), X-unit (extra 30/60 V outlet) and H-unit (high current). The system designation indicates the number and version of current units included. |
Environment | The instrument is intended for use in high-voltage substations and industrial environments. |
Mains voltage | 240 / 400 V AC, 50 / 60 Hz 480 V AC / 60 Hz |
Mains inlet | IEC 60309-2, 63 A |
Input current | Output current x open circuit voltage / input voltage |
Protection | The output transformer has a built-in thermal cut-out, and the primary side is protected by a miniature circuit breaker. |
Ammeters |
Measurement method | AC, true RMS |
Inaccuracy | 1% of range ±1 digit |
Ammeter 1 |
Ranges | 0 – 4800 A / 0 –15 kA 0 – 9600 A / 0 – 30 kA 0 – 960 A / 0 – 3 kA |
Ammeter 2 |
Ranges | 0 – 2.000 A / 0 – 20.00 A |
Maximum current | 20 A (The input is not protected by a fuse) |
Voltmeter |
Measurement method | AC, true RMS |
Ranges | 0 – 0.2 V, 0 – 2 V, 0 – 20 V, 0 – 200 V, AUTO |
Inaccuracy | 1% of range ±1 digit |
Input resistance (Rin) | 240 kΩ (range 0 – 200 V) 24 kΩ (other ranges) |
Dielectric withstand | 2.5 kV |
Phase angle |
Range | 0 – 359° |
Resolution | 1° |
Inaccuracy | ±2° (for voltage and current readings that are higher than 10% of the selected range) |
Z, P, R, X, S, Q and power factor (cos φ) | For these measurements the result is calculated using U, I and sometimes φ. |
Imax | Stores highest current value that exists ≥100 ms |
INT-level | Threshold indicating that current is interrupted. Can be set to 0.7% or 2.1% of Ammeter 1 range. |