Last column, I wrote about various applications where fire alarm relays could be used to integrate a commercial fire alarm system with other electrical systems at a customer’s site to provide them ...

SPO 1-1 Given information from discussion, handouts, and reading materials, explain the pump operator's responsibilities to pump a supply line, given the length and size of line, flow and desired ...

The article discusses how the MSR57P from Rockwell Automation improves operator protection, simplifies control system operation, and improves productivity in hazardous areas. The MSR57P speed ...

Safety relays are much needed components in today’s high-speed manufacturing operations and are used to protect operators and machines during catastrophic failures. Nov. 7, 2022 Safety relays are a ...

To be competitive, some electrical contractors often supply low-voltage (LV) service entrance switchboards and switchgear that meet the minimum safety requirements of the National Electrical Code (NEC ...

Potential relays are commonly found on many smaller, single-phase, capacitor-start, capacitor-run motors in the HVACR industry. Their function is to assist in starting the electric motor. Potential ...

What is a relay? What is zero voltage switching? How to create a zero-crossing relay driver with a simple external circuit. A relay is a device that allows for a smaller electronic switch to control a ...

Relays usually are driven using optocouplers, which offer isolation between analog and digital grounds to ensure that switching currents in the relay coils do not affect the noise margin of the ...

Relays and contactors use a variety of technologies to switch signals and power connections. Many devices called relays use similar techniques and topologies, but the terminology can be confusing.