An automatic changeover switch is designed to transfer the load automatically between mains and generator. At Selfguard, we offer Automatic Changeover Switches for single-phase and three-phase mains supply applications.
Our Single Phase Automatic Changeover Switch, with item code CSNF, transfers the load automatically from mains to generator and from generator to mains. The unit is installed between a single-phase mains supply and a single-phase generator.
When the main supply is absent and the generator starts, the Selfguard CSNF automatically shifts the load to the generator side. When the main supply is present again, the unit shifts the load from the generator to mains without any delay, while the generator runs on no-load condition.
Selfguard Single Phase Automatic Changeover Switch
The CSNF is available in ratings from 40 Amps to 200 Amps. The available ratings are 40 Amps, 63 Amps, 100 Amps, 150 Amps and 200 Amps.
The size of the 40 Amp and 63 Amp models is 230 × 170 × 115 mm, while the 100 Amp, 150 Amp and 200 Amp models have a size of 300 × 250 × 115 mm.
At Selfguard, the selection of the changeover is done according to the load of the main supply.
Selfguard Three Phase Automatic Changeover Switch
For three-phase mains supply applications, Selfguard offers the Three Phase Automatic Changeover Switch (CTF). This unit transfers the load automatically from mains to generator and from generator to mains.
The CTF is installed between a three-phase mains supply and either a single-phase generator or a three-phase generator. When the main supply is absent and the generator starts, the unit automatically shifts the load to the generator side. After the main supply is present again, it shifts the load from the generator to mains without any delay, while the generator runs on no-load condition.
The CTF is specifically applicable for three-phase main supply and single-phase load only. The webpage gives examples of such loads as lights, fans, single-phase AC and single-phase motors.
The Three Phase Automatic Changeover Switch is available from 63 Amps to 200 Amps, with ratings of 63 Amps, 100 Amps, 150 Amps and 200 Amps. Its selection is also done according to the load of the main supply.
Is a Selfguard Automatic Changeover Switch Worth Installing?
For applications covered by the product specifications, Selfguard Automatic Changeover Switches provide automatic transfer of the load between mains and generator.
The CSNF is designed for single-phase mains supply and a single-phase generator, while the CTF is designed for three-phase mains supply with either a single-phase or three-phase generator and is applicable for single-phase loads.
Therefore, the appropriate Selfguard model depends on the type of mains supply, generator arrangement and main-supply load. The available ratings allow the changeover to be selected according to the main-supply load.
Selfguard Automation and Controls was established in 1990 and is engaged in manufacturing electrical and electronic products related to mains, generator and agricultural automation. Selfguard states that it uses microcontroller technology and aims to produce quality products according to customer requirements.
For homes using the applications specified on our product pages, Selfguard provides automatic changeover solutions through its CSNF Single Phase Automatic Changeover Switch and CTF Three Phase Automatic Changeover Switch.