Könner & Söhnen KS ATS 4/32-15 automatic reserve feed unit

The Könner & Söhnen KS ATS 4/32-15 automatic transfer switch is designed to automatically control a generator set and rapidly switch the power supply from the mains to the backup generator and back. This is a convenient solution for homes, holiday homes, workshops, shops, offices or other premises where it is important to maintain power to critical loads during mains power cuts.

The model supports operation with a 230 V / 400 V mains supply and generator. For the 230 V mode, the maximum current is 64 A and the power is 14.0 kW, whilst for the 400 V mode, it is 32 A and 21.0 kW. Thanks to these parameters, the KS ATS 4/32-15 is suitable for building a stable backup power system with automatic power supply control.

The ATS unit can operate in two modes — manual and automatic. In automatic mode, the unit continuously monitors the presence of voltage in the mains supply. If there is no voltage for 5 seconds, the system sends a signal to start the generator engine. Once the generator has started, the ATS automatically moves the switch to the correct position and, after a delay, connects the load to the backup source.

This model features a Summer/Winter switch. In summer mode, the start-up time is 10 seconds; in winter mode, it is 25 seconds. The manual also states that after the main power supply fails, the unit starts the backup generator in approximately 4±2 seconds, and switches the load back within 3 seconds once mains voltage is restored. If the generator does not start on the first attempt, the system makes repeated attempts, and after several failed starts, the alarm sounds. :contentReference[oaicite:1]{index=1}

The front panel features a power switch, an ATS mode switch, a generator-to-mains voltage switch, a manual start/stop button for the generator, and indicator lights for mains, load, generator power and engine operation. This allows for convenient monitoring of the system’s status and quick control of the backup power supply in manual mode.

The KS ATS 4/32-15 connects to the generator via an 8-pin output and an 8-core control cable, which is included in the kit. The unit itself is housed in a wall-mounted enclosure, and power lines are connected via terminal blocks inside the device.

The model is designed to operate at ambient temperatures ranging from -10°C to +55°C, with a storage temperature range of -10°C to +70°C, relative humidity up to 60%, and an installation altitude of up to 300 m above sea level. The housing dimensions are 220×150×370 mm, and the gross weight is 6.1 kg.

Könner & Söhnen KS ATS 4/32-15 package contents:

• automatic transfer switch unit;
• control cable;
• user manual.