Search results
Results From The WOW.Com Content Network
The DJIA on May 6, 2010 (11:00 AM – 4:00 PM EDT) The May 6, 2010, flash crash, [1] [2] [3] also known as the crash of 2:45 or simply the flash crash, was a United States trillion-dollar [4] flash crash (a type of stock market crash) which started at 2:32 p.m. EDT and lasted for approximately 36 minutes. [5]
Consumer unit. Electrical switch. Earthing systems. v. t. e. A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry ( overcurrent ). Its basic function is to interrupt current flow to protect equipment and to prevent fire.
Property Tax Circuit Breaker. A Property Tax Circuit Breaker is a tax refund in the United States given to low income individuals and families whose property tax liability is a large percentage of their yearly income. The term was coined by John Shannon of the Advisory Commission on Intergovernmental Relations in the 1960s.
The current (as of 2013) devices are referred to as "combination type." An arc-fault circuit interrupter ( AFCI) or arc-fault detection device ( AFDD) [1] is a circuit breaker that breaks the circuit when it detects the electric arcs that are a signature of loose connections in home wiring. Loose connections, which can develop over time, can ...
Sulfur hexafluoride is generally used in present high-voltage circuit breakers at rated voltage higher than 52 kV. Into the 1980s, the pressure necessary to blast the arc was generated mostly by gas heating using arc energy. It is now possible to use low-energy spring-loaded mechanisms to drive high-voltage circuit breakers up to 800 kV.
Also known as reclosers or autoreclosers, ACRs are essentially rated circuit breakers with integrated current and voltage sensors and a protection relay, optimized for use as a protection asset. Commercial ACRs are governed by the IEC 62271-111/IEEE Std C37.60 and IEC 62271-200 standards. [1] [2] The three major classes of operating maximum ...
Fault current limiter. A fault current limiter (FCL), also known as fault current controller (FCC), [1] is a device which limits the prospective fault current when a fault occurs (e.g. in a power transmission network) without complete disconnection. The term includes superconducting, solid-state and inductive devices.
Stab-Lok is a brand name of electrical circuit breakers that were manufactured primarily by Federal Pacific Electric between 1950-1980. [1] [2] In June 1980, Reliance Electric, which had purchased FPE, reported to the United States Consumer Product Safety Commission that "many FPE circuit breakers did not fully comply with Underwriters ...