Page top

Lead Contents

FAQ01976 of Power Controllers FAQ

FAQ No. FAQ01976

Primary Contents

Question

Is it possible to use a three-phase power supply for single-phase G3PX Power Controllers?

Answer



There is no problem if only one G3PX is used but the following issues arise if more than one G3PX is used.
The G3PX-220E[]/240E[](20A/40A) use triac output elements.

If more than one single-phase models is connected to different phases in a three-phase power supply, the power supply distortion or phase control noise may make outputs unstable. (With G3PX-EH/-EHN/-EC Controllers this may cause disconnection/element ON fault detection, overcurrent detection, alarm malfunctions, etc.)

For these reasons, the power supply must be taken from the same phases if using a three-phase power supply.
The G3PX-260(60A)E[] uses a thyristor for the output element and is not easily affected.

G3PX-220E[]/240E[] (20 A/40 A)

Connected to Different Phases

Connected to the Same Phases

The following countermeasures can be used if it is not possible to take the power from the same phases.
1. Use the G3PX-260E[] (which uses a thyristor as the output element).
2. Use the G3PX-220DU (Three-phase Controller).

Recommended Products

MY

New Latching Levers for Circuit Checking Added to Our Best-selling MY General-purpose Relays

LY

Power-switching Compact General-purpose Relays

G3PE (Three-phase)

Compact, Slim-profile SSRs with Heat Sinks. Solid State Contactors for Three-phase Heaters Reduced Installation Work with DIN Track Mounting.

Other Power Controllers FAQ