electric alarm system
1Alarm circuit — An alarm circuit (also dry pair or dry loop) is an unconditioned leased pair of telephone wire from a telco. The pair does not have a dial tone or battery (continuous electric potential), as opposed to a wet pair (a line usually with no dial tone …
2Burglar alarm — Silent alarm redirects here. For the album, see Silent Alarm (album). Burglar (or intrusion), fire and safety alarms are all electronic today. Sensors are connected to a control unit via a low voltage hardwire or narrowband RF signal which is… …
3Fire sprinkler system — A fire sprinkler system is an active fire protection measure, consisting of a water supply, providing adequate pressure and flowrate to a water distribution piping system, onto which fire sprinklers are connected. Although historically only used… …
4Distribution mangagement system — SCADA systems have been a part of utility automation for at least 15 years and contributing to the decision making process of the control rooms. However, majority of the existing solutions are closely related to distribution network data… …
5fire alarm — 1. a signal that warns that a fire has started. 2. a bell, buzzer, siren, horn, etc., that provides such a signal. [1840 50, Amer.] * * * means of warning in case of fire. Originally, watchmen provided the only fire alarm system, but, with… …
6Emergency power system — Emergency power systems are a type of system, which may include lighting, generators and other apparatus, to provide backup resources in a crisis or when regular systems fail. They find uses in a wide variety of settings from residential homes to …
7National Emergency Alarm Repeater — The N.E.A.R. Warning Device. The National Emergency Alarm Repeater (NEAR) was a civilian emergency warning device in the United States. It was a 2 3 (5 7.5cm) square box designed to plug into a standard 110 volt power outlet to receive a special… …
8Operating System — Ein Betriebssystem ist die Software, die die Verwendung (den Betrieb) eines Computers ermöglicht. Es verwaltet Betriebsmittel wie Speicher, Ein und Ausgabegeräte und steuert die Ausführung von Programmen. Betriebssystem heißt auf Englisch… …
9Graybar Electric Company — Infobox Company name = Graybar Electric Company, Inc. type = Private/Employee Owned company slogan = Works to Your Advantage foundation = 1869 founder = Elisha Gray and Enos Barton location city = St. Louis, Missouri location country = U.S.… …
10Brushed DC electric motor — A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Contents 1 Simple two pole DC motor 2 The commutating plane 2.1 Compensation for stator field distortion …
