Electrical Engineering

Door Types and Door Frames

A door can be evaluated on a number of important criteria: They must block passage They must open and close easily They should be robust against intrusion They should fit the visual aesthetics of the environment in which they are mounted The basic door is the standard Single- and Double-Leaf Swinging Door. This door includes …

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Access Control System Server and Workstation

Access Control System Server store all of the system configurations and historical data, manage communications throughout the system, and serve the Workstations with real-time data and reports. Servers also control so-called “Global” system decisions or functions that span across multiple Access Control Panels. The Access control System Server is the all-seeing, all-knowing entity that completely …

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Access Control Panels and Networks

Access Control Panels perform the heavy lifting in Alarm/Access Control Systems. Every single function that Access Control Systems perform in the real world occurs first in the “mind” of an Access Control Panel. All Access Control Panels share certain attributes and components. Alarm Input and Output Control Components may be internal or external to the …

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Network Media and Connectors

Cabling is the medium for the transmission of data between hosts on the LANs. LANs can be connected together using a variety of cable types, such as unshielded twisted-pair, coax, or fiber. Each cable type has its own advantages and disadvantages . Three primary types of cable media can be used to connect systems to …

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Identifying Network Topologies

A network topology is the physical layout of computers, cables, and other components on a network. There are a number of different network topologies, and a network may be built using multiple topologies. The different types of network layouts are : Bus topology Star topology Mesh topology Ring topology Hybrid topology Wireless topology Bus Topologies A …

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characteristics of a network

A network is a group of systems that are connected to allow sharing of resources— such as files or printers—or sharing of services—such as an Internet connection There are two aspects of setting up a network: the hardware used to connect the systems together and the software installed on the computers to allow them to …

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electrical switchboards

Switchboards are similar in function to panels, but on a larger scale. A switchboard divides large blocks of electrical current into smaller blocks of current used by electrical devices . Applications range from small office buildings, to large industrial or institutional facilities. Switchboards are low voltage equipment, 600 volts or less. The purpose of a …

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electrical panelboard

Panelboards are needed to distribute electricity throughout commercial and industrial facilities. A panelboard is a component of an electrical distribution system which divides an electrical power feed into branch circuits, while providing a protective fuse or circuit breaker for each circuit, in a common enclosure. The panelboard serves to protect branch circuits from overloads and …

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Molded Case Circuit Breakers

Molded Case Circuit Breakers are used to efficiently distribute power throughout an electrical system. They provide a means to manually open or close a circuit, and are designed to protect wiring and equipment by automatically opening under an overload or short circuit condition. In the United States, most Molded Case Circuit Breakers (MCCBs) are listed …

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what is miniature circuit breaker

Miniature Circuit Breaker (MCB) are designed to protect the conductors and insulation from damage due to over load and short circuit.The simplest way to visualize a miniature circuit breaker is to think of a load center in a home, the circuit breakers inside are miniature circuit breakers. Components MCBs are made up of 5 components …

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