- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
Relating to the air or atmosphere. Subaerial is applied to phenomena occurring under the atmosphere as subaqueous is applied to phenomena occurring underwater.
Industry:Mining
Relating to the chiefly simple types of floating and surface-dwelling forms of organisms of the ocean waters.
Industry:Mining
Relay that does not operate until a predetermined time has elapsed. The time ratings are usually adjustable, but some time-delay relays have the time rating built into them.
Industry:Mining
Relay that protects an electrical system from faults occurring in any phase of a threephase system. Quite often a fault current will not be large enough to trip the overcurrent relay, but will operate the phase-balance mechanism.
Industry:Mining
Relay that serves primarily the same purpose as an overcurrent relay except that it is connected in the line by a potential transformer which measures the voltage across the line. When an overvoltage exists the relay operates and opens the circuit breaker.
Industry:Mining
Relay used to trip circuit breakers when an abnormal current of two to three times the normal flow is detected in a circuit. Relays are adaptable to transmission lines, buses, feeder circuits, transformers, and motors.
Industry:Mining
Relays used to automatically reclose electrically operated circuit breakers. They limit the duration of power failures in many instances where faults clear themselves quickly. Most reclosing relays attempt to close a breaker three times before locking it out. The time interval between reclosures is predetermined. Lockout means that after the third attempt fails to keep the breaker in, the relay will not function until it is reset manually. Such relays can be designed to operate more than three times before locking out, with the number of reclosures depending on the requirements and design of the system.
Industry:Mining
Remnants of anode copper retrieved from electrolytic refining of the metal.
Industry:Mining
