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ACS 2: Audio control system ACU 1: Air condition unit ACU 2: Alternator control unit [2] Protection from alternator over-voltage. AD Airworthiness Directive: ADA Advisory area ADAHRS Air data attitude heading reference system ADC Air data computer: ADD Acceptable deferred defect ADF Automatic direction finder: Navigation equipment ADI Attitude ...
60947-5-2 AC-13: Control of solid state loads with transformer isolation: 60947-5-1 AC-14: Control of small electromagnetic loads: 60947-5-1 AC-15: Control of A.C. electromagnetic loads: 60947-5-1 AC-20: Connecting and disconnecting under no-load conditions: 60947-3 AC-21: Switching of resistive loads, including moderate overloads: 60947-3 AC-22
ABB Group [6] is a Swedish-Swiss [7] [8] [9] multinational electrical engineering corporation. Incorporated in Switzerland as ABB Ltd., and headquartered in Zurich, [1] it is dual-listed on the SIX Swiss Exchange in Zurich and the Nasdaq Nordic exchange in Stockholm, Sweden, in addition to OTC Markets Group's pink sheets in the United States. [10]
Brown, Boveri & Cie. (Brown, Boveri & Company; BBC) was a Swiss group of electrical engineering companies. It was founded in Baden bei Zürich, [1] in 1891 by Charles Eugene Lancelot Brown and Walter Boveri who worked at the Maschinenfabrik Oerlikon.
Electromechanical protective relays operate by either magnetic attraction, or magnetic induction. [9]: 14 Unlike switching type electromechanical relays with fixed and usually ill-defined operating voltage thresholds and operating times, protective relays have well-established, selectable, and adjustable time and current (or other operating parameter) operating characteristics.
On a 3-phase circuit, a recloser is more beneficial than three separate fuse cutouts. For example, on a wye to delta conversion, when cutouts are used on the wye side and only 1 out of 3 of the cutout fuses open, some customers on the delta side have a low voltage condition, due to voltage transfer through the transformer windings .
This manual supersedes FM 100–5, 27 September 1954, including C 1, 16 December 1954, C 2, 27 July 1956, and C 3, 24 January 1958. Earle G. Wheeler: INACTIVE: FM 100–5: FM 100–5, Field Service Regulations, Operations: 19 February 1962 [25] This manual supersedes FM 100–5, 27 September 1954,
3–5 times rated current I n, e.g. a nominally 10 A device will trip at 30–50 A C 5–10 times I n: D 10–14 times I n: K 8–12 times I n. For the protection of loads that cause frequent short-duration (approximately 400 ms to 2 s) current peaks in normal operation Z 2–3 times I n for durations on the order of tens of seconds.