Protective relays and monitoring relays detect or monitor for abnormal power system conditions

Overload relays prevent an electric motor from drawing too much current and overheating; includes thermal and solid state overload types

Power resistors are used in power generation and distribution, high-voltage applications, control systems, and other power system applications. They include load banks, grounding resistors, and dynamic braking resistors

Ground Fault Circuit Interrupters (GFCI) are electrical protection devices that disconnect a circuit when it detects that current between the neutral and the live conductor is not balanced. GFCI are also known as Residual Current Device

Ground resistance testers are devices that are used to measure and test electrical grounding systems. Grounding enables optimum electrical continuity between conducting objects and earth

Ground bond testers are electrical safety test devices that perform electrical compliance tests

Solid state relays (SSR) or semiconductor relays are semiconductor devices that can be used in place of mechanical relays to switch electricity to a load in many applications

Safety relays and control modules differ from conventional relays in that they have force-guided or positive-driven contacts

High voltage relays are used to transfer power for high voltage and high frequency applications. They are heavily insulated and consist of strong materials to increase contact life

Electromechanical relays are devices that complete or interrupt a circuit by physically moving electrical contacts into contact with each other

Fault detectors and recorders are electric power instruments that detect and/or record electrical faults that may happen in power lines. A fault recorder keeps a log about the time, location, intensity of the fault

Time delay relays and solid state timers use solid state electronic devices to provide a time delay

Reed relays are electrically-operated switching devices that consist of two thin, magnetic strips (reeds) encapsulated in a glass envelope. They are used to switch industrial components such as solenoids, contactors and starter motors

Relay sockets are devices that accept relays, electromechanical switches in which the variation of current in one electric circuit controls the flow of electricity in another circuit

Relay boards (multiple relay modules) are computer boards with an array of relays and switches. They have input and output terminals and are designed to control the voltage supply