The modern Olympic Torch Relay originated in Nazi Germany in 1936 as a way to promote the myth of “Aryan” superiority. The torch’s path foreshadowed the path Hitler’s troops would take in WWII. However, the torch relay became a symbol of peace after the war. Jesse Owens won four gold medals, angering Hitler. The Olympic […]
The Olympic Flame Relay involves passing a flame from torchbearer to torchbearer around the world, starting in Greece and ending at the Olympic Games. The flame travels in unusual ways and events are held to celebrate it. The tradition began in 1928 and anyone can be a torchbearer. The torch is used to light the […]
Auxiliary relays assist other devices in performing actions by opening or closing circuits. They are used in electronic devices such as lights, televisions, phones, computers, and automobiles. Examples include wall switches and power buttons. An auxiliary relay is a relay that assists another relay or device in performing an action. It does this when its […]
A fuel pump relay directs power to the electric fuel pump, preventing overheating. It’s located under the hood, and turning the key to the on position can test it. If it’s faulty, it’s easy to replace. A fuel pump relay is an electrical device much like an automotive fuse. It directs power to the electric […]
Protective relays detect faults in electrical circuits and trip the circuit breaker. They can respond to overcurrent, overvoltage, and frequency conditions. Modern relays use microprocessors and can estimate the distance to the fault. Distance relays are common on high voltage transmission lines. A protective relay is a device that trips or opens a circuit breaker […]
Thermal overload relays protect electrical equipment from damage or destruction by disconnecting power when temperature exceeds the relay rating. They use heat sensitive elements such as bimetallic strips or electronic sensors to detect increases in temperature caused by current flow and overload. They are installed in control circuits of large machines or as a direct […]
The Buchholz relay is a safety feature for electrical transformers, chokes, and capacitors that prevents damage during short circuits or other dangerous electrical failures. It was invented by Max Buchholz in the 1800s and is a circuit breaker that controls oil supply and detects air leaks. The device is heavy and can handle high electrical […]
An overcurrent relay cuts power to a circuit or machine if it detects an overload or fault. It consists of a switch and a current sensing relay, with a delay feature to handle high current draws. It prevents damage, explosions, and electric shocks. It can be standalone or integrated, with adjustable current settings and time […]
Control relays are electromagnetic switches used to switch high currents and isolate output voltages. They rely on an electromagnetic field and have a normal position that can be open or closed. Relays are used in appliances to prevent excessive power dissipation and damage to switches. Master control relays are used in safety devices, and there […]
Power relays use an electromagnet to open or close a circuit. They can operate with low or high voltage and are used in various applications, including automobiles. There are different types of power relays, including reed and mercury bath relays, but the latter is rarely used due to its high cost and limitations. A power […]
The Colorado Relay is a 174-mile race for teams of 5-12 runners, with some teams made up of elite runners called “Ultra”. The race is challenging due to steep inclines and high elevations, and teams must carry medical kits. Participants must be at least 16 years old and can win prizes such as a hearty […]
An SMTP relay is a computer that routes incoming and outgoing emails to a specific destination. There are two types: open relay and authenticated relay. SMTP relays often use authentication to prevent harmful emails, and can be hosted on a dedicated machine for added security. A simple mail transfer protocol (SMTP) relay is a computer […]
Frame relay is a fast and efficient way to transmit data packets between LANs in a WAN. It uses virtual circuits and is relatively inexpensive, but does not provide end-to-end data correction. It can deliver data with high reliability and is a valid alternative for data transmission. Frame relay is a computer network structure that […]
Electromagnetic relays are electrical switches controlled by an electromagnet, used in various applications. Its core is an electromagnet that attracts a revolving iron armature to operate contacts. It can control a higher power output than input and is used as a buffer to isolate circuits. An electromagnetic relay is a type of electrical switch controlled […]
Relay racks are storage systems for communication and networking equipment, dating back to the 19th century. They are typically 19 inches wide, with varying heights and depths. They are made of fire-rated steel or aluminum and are customizable. They are used in corporate offices, computer centers, and telecommunications facilities. A relay rack is a storage […]
