Modular automatic transfer switch with protection functions | energy metering | for generators | for uninterrupted power supply | 150A | 3x230V | from 380V to 230V

Although the input is 3P+N – N, L1, L2 and L3, the device is designed to select one phase out of three and supply it to a single-phase L + N output. It does not supply a three-phase load with all three phases simultaneously.

L1 normal → load supplied from L1. L1 unsuitable → L2 is checked. L2 suitable → load is switched to L2. If L2 is also unsuitable → L3 is checked.

The voltage protection responds to the mains voltage level and does not replace an SPD designed to limit lightning-induced or short-duration transient overvoltages.

The device is designed for circuits requiring current monitoring up to 150A. The actual permissible load must be coordinated with the cable cross-section, connection method, upstream protective circuit breaker and electrical installation design.

The supplied specification states energy metering and programmable kWh values. Measurement error is less than 1%. This should not automatically be considered a certified electricity meter intended for billing purposes.

The delay helps prevent immediate load reconnection as soon as the voltage returns and gives the mains supply time to stabilise.

• Automatically selects one of 3 phases to supply a single-phase load.
• Priority phase function allows the main supply phase to be configured.
• Up to 150A adjustable overcurrent protection.
• Overvoltage and undervoltage monitoring for each phase.
• Automatic power restoration after suitable electrical parameters are restored.
• Temperature protection in the 40–85°C range.
• Energy metering in kWh with programmable energy values.
• ON/OFF timer up to 9999.9min.
• Displays L1, L2 and L3 voltage simultaneously.
• Displays current, frequency, temperature and energy.
• Compact 108mm / 6-module housing.
• 35mm DIN rail mounting.

• Single-phase output: the device does not replace a 3P or 4P ATS intended for a three-phase load.
• Up to 150A: cable cross-section, connection and upstream protection must be selected according to the actual load.
• IP40 / IP20: the device is intended for installation inside a protected electrical enclosure.
• Energy metering function: without additional metrological documentation it should not be used as a billing meter.
• This is not an SPD: voltage protection does not replace a surge protective device.
• This is not a universal short-circuit protective circuit breaker: correctly selected upstream protection is required.

The facility has a three-phase four-wire electrical supply L1, L2, L3 and N, but the critical load is single-phase. L1 is configured as the priority phase. Under normal conditions the load is supplied from L1. If the L1 voltage falls below the configured threshold or disappears completely, the device automatically checks L2 and, if its parameters are suitable, switches the single-phase load to L2. If L2 is also unsuitable, L3 is selected. When L1 is restored, the load can automatically return to the priority phase after the configured delay.

The input is three-phase 3P+N, but the output is intended for a single-phase load. The device selects one of the L1, L2 or L3 phases.

No. A three-phase motor requires all three phases simultaneously, while this device is designed to select one phase.

The overcurrent protection threshold is adjustable up to 150A.

Yes. The device supports priority phase selection.

Yes. When suitable parameters are restored, automatic recovery can be used after a 1–999s delay.

Yes. The display shows L1, L2 and L3 phase voltage separately.

Yes. Load current is displayed in amperes.

Yes. Mains frequency display in Hz is supported.

Yes. An integrated kWh energy metering function is provided.

No such metrological certification is specified in the supplied information, therefore the energy metering should be considered an integrated monitoring and control function.

Yes. The ON and OFF timers are adjustable from 0.1 to 9999.9min.

Yes. The temperature threshold is adjustable from 40°C to 85°C.

It is mounted on a standard 35mm DIN rail. The housing width is approximately 108mm or 6 DIN modules.

The 150A device must be installed by a qualified electrical specialist. Cable cross-sections, terminal connections, upstream circuit breakers or fuses must be correctly selected, and the N and PE arrangement of the electrical system must be checked. The device is designed for switching a single-phase load between L1, L2 and L3 phases and must not be used as a 3P / 4P ATS for a three-phase load. The power supply must be completely disconnected before installation work.