Single-phase and 3-phase AC squirrel cage induction motors need some type of control circuit to initiate a start or stop function. The two types of ladder control circuits commonly used are the 2-wire ...

The proper selection of 3-phase solid state relays for motor control application depends not only upon a comprehensive understanding of 3-phase SSRs, but also of the 3-phase power system and typical ...

The logic and expansion I/O in MMRs can add a number of functionalities that go beyond its embedded firmware. Most industrial facilities include electric motors that require overload relays for ...

In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...

The circuit in this Idea for Design provides three levels of speed control for a dc motor using a PC’s parallel port (LPT1). A C++ program performs the control functions by allowing the signals from ...

Utilizing a purely electronic switching structure, these relays generate no EMI/RFI (electromagnetic interference/radio ...

Note: This specialization requires purchase of a hardware kit in order to apply your knowledge and skill with real world tools. The hardware will be used to complete the lab exercises across the four ...

Schweitzer Engineering Laboratories, Inc. has introduced new features in the SEL-701 motor protection relay. Schweitzer Engineering Laboratories, Inc. (SEL) has introduced new features in the SEL-701 ...

Infineon has added slew-rate control to its Hitfet range of relay-replacing low-side switches. Aimed at automotive and industrial applications, and called Hitfet+, the devices also have enhanced ...