Why hybrid multifunction motor starters are worth a closer look
Offering a smaller, smarter alternative to conventional starters, hybrid multi-function motor starters are growing in popularity. They are easier to install and integrate and provide greater functionality than conventional DOL and reversing starters <4 kW. They are compact, more reliable, and simpler to use and worth a closer look
They combine forward and reverse running functions and motor overload/phase loss and imbalance protection in a single 22.5 mm module. According to Schneider Electric, they provide a 75% space-saving, a 60% reduction in installation and ten times electrical life. Moreover, they are also available with an emergency stop to SIL 3, and fieldbus communications and other functions.
Another advantage is the use of electronic overloads to protect the motor. Traditional motor starters use thermal overload relays to emulate the motor characteristics and provide protection. The benefit of electronic overloads is they offer a wider range of more accurate protection. By monitoring the current and voltage, protection includes phase failure conditions, under and overvoltage.
Hybrid multifunction motor starters
The term hybrid multifunction motor starter comes from the dual switching action at the heart of the devices. On starting, semi-conductors switch the initial motor load current. Once started, a mechanical relay bypasses the electronic switch and remains closed while the motor is running. When stopping or reversing the motor, the process happens in reverse, with the high current switching managed by the semiconductors. This makes them suitable for demanding applications with a high switching duty.
The use of electronics gives users a wide range of control options. They can be set for manual, remote, or automatic reset. They are also suitable for switching directly from the output of a PLC.
Hybrid multifunction motor starters meet the growing demand for intelligent machine automation, building automation and energy monitoring. This makes them interesting for machine builders, OEMs, and panel builders. The 22.5 mm wide modules support side by side mounting and stocking is lower due to the simple overload current change.
They simplify installations through shorter design times, reduce control panel size, improved safety and reliability and allow faster troubleshooting. There are applications across industry and commerce, for example, hoists, pumps, fans, small machines and multi-motor panels.
Tesys H hybrid starters complement existing methods of electronic motor control like soft starters or VSD but without the complexity. Unlike them, they are single speed DOL starters that use electronic switching to manage motor operation by combining electronic and traditional techniques.
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