Reference · Artificial mains · Mechanical engineering
Precise network on the spot:Artificial mains for powering electrical equipment on an isolated trolley line with a 60 Hz supply voltage. TRAN
Customer challenge
VONSCH solution - turnkey
The AN 250 kVA 60 Hz artificial mains – a generator of the required electrical voltage with a 60 Hz output frequency – was designed to power electrical equipment (supplying a 107 kW induction motor through a frequency converter and star-delta (Y/D) starting of a 90 kW induction motor) on an isolated trolley line with a 60 Hz supply voltage, limited to the continuous, nominal and maximum current of the artificial mains. The transformer’s generated AC output voltage is sensed by a measuring circuit connected as feedback in the output-voltage control loop. The desired output voltage is fine-tuned with a potentiometer within a defined range. The output AC voltage, current, frequency, power factor and other values are shown on a digital display. The AN 250 kVA, 60 Hz artificial mains was engineered to the customer’s individual requirements. It features a lockable output-voltage selector switch, a lockable output (key-operated START button), a CENTRAL STOP button interlocked with the CENTRAL STOP button in the main switchboard of the tested machines, an output safety disconnect contactor, and an earth-fault current transformer with an electronic earth-fault relay. Visualization of the artificial mains is provided by an EWON industrial router.
Scope of delivery (technical specification)
- Technical solution
- Design
- Manufacturing, installation
- Artificial mains – Panel No.1 (output section) and Panel No.2 (electronics section)
- Power transformer in Panel No.1
- Commissioning and operator training
- Visualization
Project in numbers
What the customer gained
- Export products tested at home – no complaints from the target market due to a different grid.
- Repeatable tests – stable output independent of local grid quality.
- Replacement for rotary converters – higher efficiency, less noise, minimal maintenance.
- Parameters exactly per the test specification – no series-product compromises.
- Long-term service from the manufacturer – the test bay is critical and must not stand still.
Why VONSCH
We reduce the risk of a wrong decision - from design to service you deal with a single partner who stands behind the solution.
- A manufacturer, not a reseller - we develop and build power electronics in Brezno, Slovakia.
- A turnkey solution - one responsibility from design through installation to commissioning.
- Service and spare parts from Slovakia throughout the entire lifetime of the equipment.