FAQ Search Results

The chassis ground is a connection in a power supply that can be connected to a metal housing with an earthing conductor system or to the machine ground.

The crest factor is the ratio of the peak value to the effective value of a parameter. A sinusoidal (sine-wave-shaped) alternating current voltage with an effective value of 230 V and a peak value of 325 V has a crest factor of 1.41.

Daisy chaining is a wiring scheme where several power supplies are connected in sequence. It is used to achieve a higher total current.

Derating is the reduction of the maximum output power, depending on the environmental conditions. It is a recommended protective measure for power supplies. It protects them from excessively high temperatures and prevents system failures.

DeviceNet is an open sensor/actuator bus system used throughout the world. The field bus is supplied with power via two wires of a multi-conductor cable.

A DIN rail is a 35-mm mounting rail which is also known as a top hat rail.

Electrochemical double layer capacitors or EDLCs are also known as supercapacitors or ultracapacitors.

An input inrush current is a current surge at the input of a power supply that occurs when the input capacitors are charged after the input voltage is applied. The inrush current must be kept to a minimum.

The adjustment range generally refers to the guaranteed trim range of the output voltage.

Electrostatic discharge or ESD is a spark or discharge resulting from a large potential difference in an electrically insulating material that causes a high and very brief electric current pulse. Power supplies have to comply with the minimum ESD requirements specified in EN 61000-6-2.

Flicker is a low-frequency effect on mains voltage caused by loads. For example, flicker leads to fluctuations in the brightness of lights and computer screens.

Hiccup is an overload behaviour at the outputs of power supplies. In the event of an overload or short circuit, the power supply switches off and makes periodic attempts to restart until the fault is rectified.

Hot plug or hot swap is the process of replacing components while they are in operation.

An inhibit input is a signal input that allows buffering in a DC-UPS or in a buffer module to be interrupted or prevented by means of an externally supplied voltage.

An inverter converts a direct current voltage (for example from a solar panel or a battery) into an alternating current voltage. Normally, the alternating current voltage produced by an inverter can be fed into the grid.