A single-switched relay can close inadvertently in response to a single false feed current.A double-switched relay cannot close inadvertently with the application of the same current. At least two separate faults would be required to allow this relay to close inadvertently.
Double switching, double cutting, or double breaking is the practice of using a multipole switch to close or open both the positive and negative sides of a DC electrical circuit, or both the hot and neutral sides of an AC circuit. This technique is used to prevent shock hazard in electric devices connected with unpolarised AC power plugs and sockets. Double switching is a crucial safety engineering practice in railway signalling, wherein it is used to ensure that a single false feed of current to a relay is unlikely to cause a wrong-side failure. It is an example of using redundancy to increase safety and reduce the likelihood of failure, analogous to double insulation. Double switching increases the cost and complexity of systems in which it is employed, for example by extra relay contacts and extra relays, so the technique is applied selectively where it can provide a cost-effective safety improvement.
Doubleswitching, double cutting, or double breaking is the practice of using a multipole switch to close or open both the positive and negative sides...
offense DoubleSwitch (video game), a 1993 release by Digital Pictures for Sega CD and other platforms Doubleswitching, using a multipole switch to open...
limits on the current and voltage they can handle, finite switching time, etc. The ideal switch is often used in circuit analysis as it greatly simplifies...
"Englishman") in German. A single slip switch works on the same principle as a double slip, but provides for only one switching possibility. Trains approaching...
In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load from more than one location...
Double consciousness is the dual self-perception experienced by subordinated or colonized groups in an oppressive society. The term and the idea were first...
ability often creates situations where the opposing team will attempt to double up their defenders against him. Curry will pass to Green as he rolls out...
voltage doublers cannot switch in this way and require a driving circuit to control the switching. They frequently also require a switching element that...
SELV adapter, even though the onboard battery could pose a fire risk. Doubleswitching IP Code Mains power plug Portable appliance testing J. Lienig; H. Bruemmer...
include Adventures in Babysitting (1987) with Elisabeth Shue; DoubleSwitch (1987); Switching Channels (1988) with Kathleen Turner, Burt Reynolds and Christopher...
hot switching, cold switching, average power and peak power. Hot switching occurs when RF/microwave power is present at the ports of the switching at the...
28, 2017. Mochizuki, Takashi (March 17, 2017). "Nintendo to Double Production of Switch Console". The Wall Street Journal. Archived from the original...
signal switching. Mercury-wetted relays make and break circuits using a thin, self-renewing film of liquid mercury. For higher-power relays switching many...
infiltrate the controlling organization or may result from the turning (switching sides) of previously loyal agents of the controlling organization by the...
Immunoglobulin class switching, also known as isotype switching, isotypic commutation or class-switch recombination (CSR), is a biological mechanism that...
be made to alter the batting rotation of the DH. In other words, a doubleswitch involving the DH and a position player (with the exception of players...
long double a synonym for double. The Intel C++ compiler on Microsoft Windows supports extended precision, but requires the /Qlong‑doubleswitch for long...
VLAN hopping: switch spoofing and double tagging. Both attack vectors can be mitigated with proper switch port configuration. In a switch spoofing attack...
using a pinch hitter. This use of a pinch hitter is often part of a doubleswitch, in which a relief pitcher replaces a defensive player who will not...
multiway switching, the correspondence between a single switch's state and whether lights are on or off depends on the state of the other switch[es] in...
correct to break up a natural by switching, for instance in the case AT + T[3-8] vs. dealer 7, 8 or 9. The correct switching choice depends on the dealer...
Occasionally a pinch runner is inserted for other reasons (such as a doubleswitch, ejection, or if the original player on base has become injured, such...
The double bass (/ˈdʌbəl beɪs/), also known as the upright bass, the acoustic bass, or simply the bass (/beɪs/), is the largest and lowest-pitched chordophone...
existing consoles. Bank switching originated in minicomputer systems. Many modern microcontrollers and microprocessors use bank switching to manage random-access...
switching mixer is to achieve the linear operation by means of hard switching, driven by the local oscillator. In the frequency domain, the switching...
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