Megger Oden AT/1H Primary Current Injection Test System

The system consists of a control unit together 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. This makes it possible to configure an ODEN AT system in a suitable way. All parts are portable, and ODEN AT can be quickly assembled and connected. Example: ODEN AT/2X - 2 = Number of current units, X = Version of current unit (S, X or H). The control unit has many advanced features - a powerful measurement section for example, that can display turns ratio as well as time, voltage and current. A second measurement channel can be used to measure an additional current or voltage. Current transformer turns ratio, impedance, resistance, power, power factor (cos ?) and phase angle are calculated and shown in the display. Current and voltage can be presented as percentages of nominal value. Primary current injection testing & breaker testing These tests require high currents and the ability to measure very short duration, current flow. ODEN AT has been designed especially to meet these needs. No extra contacts are needed to measure the operating time of a low-voltage breaker. Testing stops at the instant when the main breaker contacts open to interrupt the current. Output current initiation is synchronised with the currents zero-crossover point to ensure good repeatability and minimised DC offset. Testing current transformers For turns ratio testing, the primary current and either the secondary current or the turns ratio are displayed simultaneously. Since the turns ratio is displayed directly as the nominal value (1000/5 for example), no further calculation is needed. Burden of secondary circuits can be measured and presented in VA. Polarity testing The currents phase displacement is shown, and the polarities of the outputs are clearly marked. FEATURES Modular design to permit optimal user configuration of output current vs. unit size. Compact transport cart facilitates portability into switchgear rooms with limited space. Unique I/30 function allows the current to be pre-set using low current to prevent test sample heating. Mains voltage: 240/400V AC, 50/60 Hz. Megger Oden AT Product Video Megger ODEN AT/1H Specifications Environment Application Field The instrument is intended for use in high-voltage substations and industrial environments. Operating temperature 0°C to +50°C (+32°F to +122°F). Storage & transport -25°C to +55°C (-13°F to +127°F). CE Marking LVD 2006/95/EC. EMC 2004/108/EC. Measurement Section 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. Resolution 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 - 359°. Resoluton 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 ?) For these measurements the result is calculated using U, I and sometimes ?. 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 range for Ammeter 1. General Specifications 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. Dimensions Control unit AT 570 x 310 x 230 mm (22.4” x 12.2” x 9”). Current unit S, X H 570 x 310 x 155 mm (22.4” x 12.2” x 6”). Complete with cart 690 x 350 x 860 mm (27.2” x 13.8” x 33.9”). Weight Control unit AT 25 kg (55 lbs). Current unit S 42 kg (92.6 lbs). Current unit X 45 kg (99.3 lbs). Current unit H 49 kg (108 lbs). Cart 11 kg (24.3 lbs). Display LCD. Available languages English, German, French, Spanish, Swedish. Megger Oden AT/1H warranty One-year.

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