Wetting current

Wetting current

In electrical engineering, a wetting current (or "sealing current") is the minimum current needing to flow through a newly-closed mechanical switch or relay in order to break through any film (contact oxidation) that may have been deposited on the switch contacts while open. The film (contact oxidation) occurs often in areas with high humidity.

The alternate spelling whetting current is also used. This spelling implies that the origin of the word may be to "whet" the contacts which means to "sharpen" or "make keen".


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Daytime wetting — Enuresis is defined as involuntary voiding beyond the age of anticipated control. Diurnal enuresis is daytime wetting, nocturnal enuresis is nighttime wetting. Both of these conditions can occur at the same time, however, many children with… …   Wikipedia

  • List of current ships of the United States Navy — Harry S. Truman visits Greece 2002 This is a list of current ships of the United States Navy. There are more than 400 ships believed to be in active service with the United States Navy, on reserve, or under construction, based on public reports… …   Wikipedia

  • Switch — For other uses, see Switch (disambiguation). Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle… …   Wikipedia

  • U.S. Navy type commands — Current US Navy type command organizational structure (2010) U.S. Navy type commands perform vital administrative, personnel, and operational training functions for a type of weapon system (i.e., naval aviation, submarine warfare, surface… …   Wikipedia

  • Soldering — For the song, see Soldering (song). For the product, see Solder. Desoldering a contact from a wire. Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal (solder) into the joint, the… …   Wikipedia

  • Nocturnal enuresis — Classification and external resources ICD 10 F98.0, R32 ICD 9 …   Wikipedia

  • Bedwetting — ICDO = OMIM = MedlinePlus = 003144 eMedicineSubj = ped eMedicineTopic = 689 MeshID = D053206Bedwetting is involuntary urination while asleep after the age at which bladder control would normally be anticipated. The medical term for this condition …   Wikipedia

  • Diurnal enuresis — Classification and external resources MeSH D053207 Enuresis is defined as involuntary voiding of urine beyond the age of anticipated control. Diurnal enuresis is daytime wetting, nocturnal enuresis is nighttime wetting. Both of these conditions… …   Wikipedia

  • Iron pillar of Delhi — For other uses, see Ashoka Pillar (disambiguation). The iron pillar of Delhi The iron pillar of Delhi, India, is a 7 m (23 ft) high pillar in the Qutb complex, notable for the composition of the metals used in its construction. The… …   Wikipedia

  • Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”