This is an extension of the original FUEL SAVE system from 2015. Both FUEL SAVE systems (containers) are interconnected to the main circuit breaker to connect the PV input in the substation. The communication is done by the communication link between control cabinets (DT1, DT2) in both containers. COMAP InteliGen NT control systems for the control of diesel generators in the substation are interconnected on the communication bus to the InternetBridge-NT communication module, which is connected to the control system in the DT1 switchgear over Ethernet. Through the InternetBridge-NT module, it is possible to visualize the parameters of each connected GENSET and to set them remotely.

Fuel save system is installed in autonomous grid systems in remote area. Main source of energy are diesel gensets. To reduce the high fuel costs, a PV power plant has been built. PV power plant is very suitable and economically viable, because it is a very sunny region. To enable safe and reliable operation with the gensets, a special inverter software and control system have been designed.

The device can supply the electricity to the grid even during a minimum flow of water, with high quality of current: (cos φ = -1, the current THD 5%). The device is equipped with an emergency electro-hydraulic. The generator is connected to the screw turbine via a gear. The level of the water is detected by an ultrasonic level sensor and locks level are aically controlled by DC drives. DC drives have backup power from a battery that is recharged by FOTO CHARGER DC 48 charger. Automatic control system is provided by the control system. The system evaluates generator bearing temperature, transmission oil temperature, bearing temperature turbine position locks using limit switches, water level of the river. The entire system is monitored remotely via eWON industrial router.

Comprehensive solution for the mining traction locomotive electronics. For the main drives, the SEMIKRON SEMiX equipped inverters are based on the proven UNIFREM platform. For each locomotive drive, unique torque-speed vector control is used - the joystick on the control panel in the locomotive cabin is not only the speed reference, but also the torque reference. The torque between the individual drives is intelligently electronically balanced for the smooth operation of the locomotive. The locomotive control system is based on the SIMATIC S7-1200 system, it has a color display.

Single phase AC output voltage is sensed by special measuring circuit which is connected as a feedback to the control circuit, the output voltage is then respected regardless of the load value. Desired voltage generated at the output artificial AC mains network is tuned by potentiometer within a specified range. AC output voltage, current and frequency is displayed on the digital display . As part of a special contract, 3 pcs of AN 1F 230V AC and 2 pcs of AN 1F 120V AC were connected to single communication line for visualization, monitoring and data backup of artificial AC mains. Artificial mains AN 1F 230V AC generates single phase 230 V AC voltage (adjustable output voltage in the range 180 ÷ 270 V AC) with selectable frequency 60 / 50 Hz. BASIC TECHNICAL DATA: SUPPLY : 3/PE/N ~ 50 Hz 400 V / TN-S OUTPUT SYSTEM: 2P + ~ 50 / 60 Hz 180 ÷ 270 V / TN-S RATED CURRENT: Inin = 125 A Inout = 200 A Artificial AC mains AN 1F 120V AC generates single phase 120 V AC voltage (adjustable output voltage in the range 100 ÷ 140 V AC) with selectable frequency 60 / 50 Hz . SUPPLY VOLTAGE SYSTEM: 3/PE/N ~ 50Hz 400 V / TN-S OUTPUT VOLTAGE SYSTEM: OUTLET: 2P + ~ 50 / 60 Hz 100 ÷ 140 V / TN-S RATED CURRENT: Inin = 125 A Inout = 350 A

Hybrid PV system is able to operate in three different modes: 1.Automatic mode: - when the mains voltage is available, inverters are working in on-grid mode, and the consumption of the building in the point of coupling to the mains is measured. According to the consumption, the power of the inverters is controlled to achieve the zero grid injection. When there is a failure in the mains grid, the PV system smoothly enters the off-grid mode and the line monitoring relay disconnects the house from the grid. After restoring the proper voltage in the grid, PV system smoothly switches to on-grid mode. 2. Off-grid: In this mode, the PV system operates in the off-grid mode independently of the conditions of the mains grid. 3. On-grid, inverters off: This is the mode when the system is avoiding the invertes - inverters are off, line monitoring relay is always on, despite the condition of the grid. Basic technical voltage: Input voltage system: Rated battery voltage: 48V DC Rated PV panel voltage: 350V DC AC mains: 1/N/PE ~ 50Hz 230V/TN-S Output voltage system: 3/N/PE ~ 50Hz 230V/TN-S 1/N/PE ~ 50Hz 230V/TN-S Rated inverter output current: INOM=8,7 A ~ AC Max. inverter output current: IMAX=15A ~ AC Control voltage: 24V DC Protection: IP 54/20 (Enclosure/Inverter)

Trolley voltage: 250 V DC Inverter: 125 kVA Output frequency: 0 – 79 Hz Motors: 2 x 55 kW 3 x 220 V .

Trolley voltage: 250V DC Inverter power: 125 kVA Output frquency: 0-79 Hz Motors: 2x55 kW, 3x220 V

Solution of the artificial AC mains AN 500kVA 60Hz – the supply of required electric voltage with selectable frequency 60 Hz / 50 Hz conforms to testing of compressors motors of different power (continuous acceleration of two compressors with power 160kW or start of one compressor of power to 350 kW with frequency internal inverter). Artificial AC mains AN 500kVA, 60Hz was designed according to individual customer requirements. The entire set of artificial AC mains consists of switchgear ARRAY No.1 (output section) with electrical and signaling equipment and controls, switchgear ARRAY No.2 (electronic part) and with electrical equipment and output power transformer TC1 600kVA. The electronic part is equipped with the latest power elements with minimal losses. Artificial AC mains seamlessly covers high starting current of the two compressors 160kW of motor power when one is already running and the other is starting (wye / delta switching). AC output voltage of the transformer is sensed by special measuring circuit which is connected as a feedback, so the output voltage is kept regardless of the load value. Voltage setpoint can be tuned by the potentiometer within a specified range. AC output voltage, current and frequency is displayed on the digital display. TECHNICAL INFORMATION: Input voltage: 3 x 400V ~ AC +10%, - 10 %, 50Hz TN-C Output voltage: 3 x 460V ~ AC +10%, - 10 %, 60/50 Hz TN-C Adjustable range of output voltage : 3 x 414V to 3 x 506V ~ AC Output frequency: selectable 60Hz / 50Hz

Power Factor Correction of PVP is solved by installation of 2 pcs of active compensating units "UNIKOMPENZATOR 400" in accordance with the requirements of the distribution grid. It helps to maintain the desired power factor (cos φ) over the entire photovoltaic supply of reactive power (inductive or capacitive nature) of the distribution network. Standard regulatory scope of the entire PV power factor can be adjusted in the range from 0.95 to 0.95 capacitive inductive. Power factor setpoint is requested from the distribution grid in 5 steps. Both compensation units are connected to the 0.4 kV side of the grid transformer 0,4 / 22 kV. Measurement of current and voltage signals (for transmitter phase angle cos φ) is performed directly on the HV side and also serve as a feedback controller.

In a separate, ventilated kiosk there is an enclosure for FVE1 and the battery. Two air-conditioned enclosures for FVE2, FVE3 and their batteries are installed in the second separate ventilated kiosk. FVE1 is a three-phase photovoltaic system, FVE2 and FVE3 are single-phase photovoltaic systems designed to generate energy for a refugee camp in Iraq. Enclosures of FVE1, FVE2, FVE3 operate in two modes - AUTOMATIC mode or GRID mode. In AUTOMATIC mode, the appliances are fed from battery-powered inverters in off-grid mode. The battery is aically charged and battery parameters - voltage and the temperature of cell section are constantly measured and monitored by the Battery Management System. With long-term low sun light and battery capacity drop to a critical level, control system switches the supply of appliances to the distribution grid. When the conditions of the control system are met again, the off-grid mode is enabled. In the GRID mode, all appliances are supplied exclusively from the distribution grid. The touch screen on the door of each enclosure offers possiblity of parameters adjusting, display of alarms, system diagnostics and system status. The power of each of FVE1, FVE2, FVE3 is complemented by a complete monitoring, web visualization of the statistics and archive of the overall energy production.

Cooling system with pressure regulation, two independent circuits.

Artificial mains is used for compressor testing. Single phase AC output voltage is sensed by special measuring circuit which is connected as a feedback in output voltage control circuit. The output voltage setpoint is kept regardless of the load value. Desired voltage at the output is tuned by potentiometer within a specified range. Output AC voltage, current and frequency is displayed on the digital display. INPUT VOLTAGE: 3/PE/N ~ 50Hz 3x400V/TN-S OUTPUT OUTPUT VOLTAGE: 2P + ~ 60Hz 100 ÷ 120V/TN-S RATED CURRENT: Inin = 80A AC Inout = 142A AC MAXIMUM CURRENT: IMAXout = 230A AC (to 2s) CONTROL VOLTAGE: 230V AC, 24V DC PROTECTION: IP 54/20

Frequency converters with back-up power supply units ensures by power failure drive in to nearest station and opening the door, so the persons can get out.

Custom designed laboratory for East Slovakian distribution company and Technical university of Kosice. User can adjust the voltage, frequency and the load impedance to test the behaviour of different PV systems.

Vector control of torque and speed, converter is commanded over MODBUS RTU from PLC SIMATIC S7-1200. System is remotely monitored over eWON industrial router.

To ensure backup power supply, standalone backup controlled 3-phase artificial AC mains for the expected maximum load of 2.2 kVA has been developed. This system produces the output sinusoidal AC line voltage 3x400 and 3x230V + PEN phase voltage. Each output phase is fused with a separate circuit breaker.

This is a project made upon a special request from the customer. It involves two kinds of inverter - PV panel fed for on-grid operation and 48V battery fed for hybrid operation. The hybrid inverter serves mostly for self-consumption covering late in the evening and during the night. On-grid inverter is user for self-consumption cover during the day. The surplus energy is used for battery charging. All process is designed to minimize the grid dependency, to maximize the energy usage. Control algorithm is implemented in VONSCH RM-WEBi system. Priorities on energy usage can be adjusted by the end user.

Trolley voltage: 275 V Inverter: 170 kVA Output frequency: 0 - 120 Hz Motors: 2 x 75 kW, 3 x 220 V .

In the rainwater pumping station are installed two independent screw pumps for drainage of rainwater. First softstarter SINAM 400/191 starts the pump motor #1. Second SINAM 400/191 starts the #2 pump motor. The control system for the rainwater pumping station aion includes controls for aic control of pump switching, manual mode or manual mode to the level. The rainwater height is sensed by a level switch, and the control system in aic mode decides which pump is to be operated while maintaining the pump alternation condition. In all control modes, the critical level level is sensed by the vibrating fork level switch, and in aic mode, at the critical rainwater level, both pumps are switched on at the same time. The display has 4 screens showing total data, level height, softstarter status information, setting options, etc. In manual mode, it is possible to manually operate the start / stop buttons. At the critical level of the rainwater, it is possible to select the control of both pumps at once. In the event of a power failure, the control system has backup power, meets safety requirements, and sends individual information about softstarter, level, backup power to the JABLOTRON JA80 control panel and the entire system is visualized locally on the intranet. In the future, the Control System will also manage the system for aic lubrication of individual pumps

Our sales representative in Czech Republic - Tespo Engineering Ltd was solving this study for the drive of the crane, which is in permanent operation. Customer needed the drive in a way that generative mode of operation of the motors is supported; the drive has to be allowed recuperate the energy to the grid. That is the reason why the drive of the most powerful motor has been solved by four quadrant drive QUATROFREM 400. The input side of this drive (controlled rectifier) is used for supplying two other drives: crane travel and traversing. DC circuits of all the drives are interconnected, which allows free flow of the energy across the drives and saves energy costs for the customer.

Regulation of crane travel,crab and lift. Fast response and accuracy thanks to VONSCH unique vector control.

Backup power for the elevator drive in home for pensioners was designed and intended for short-term emergency lift mode ( immobile patients transfer ) in the case of power failure. The existing elevator switchgear was enriched with batteries enclosure and VONSCH converters enclosure. This solution is managed by an elevator according to the original design,it can be manually switched to a backup system and powered by batteries during power failure. Batteries enclosure is connected to the VONSCH converters enclosure. This enclosure is connected to the existing switchboard for elevator control of the lift. Hydraulic drive unit is connected to the elevator control cabinet inverters. In the presence of the power supply unit is connected to a hydraulic motor contactors in the converters enclosure according to the original plan and is managed by the original logic. In case of power failure motor is switched to wye connection by the contactors and is controlled by the UNIFREM 400 011M frequency converter. In case of power failure, control circuits of the elevator supplied from the UNIFREM 002M inverter. In the presence of the supply voltage batteries can be aically recharged. BASIC TECHNICAL DATA Voltage system: 3/PE/N ~ 50Hz 400V/TN-S Rated current: In=40A Control voltage: +24V DC, 230V~AC Protection: IP 43/00

GSE CONTROL is made for minimization of grid power flow for the objects equipped with own energy source (PV or other power plant) and having a significant own consumption. The GSE CONTROL evaluates S0 outputs from the energy meter connected to the point of common coupling. GSE CONTROL aically controls the energy flow between the battery and the three phase AC grid. There are several basic modes: battery charging (from the energy surplus), battery discharging (own consumption cover), equalized charging. Batteries are not the part of delivery.

By using the Control Panel (optional internal or external panel by switch) frequency and direction of motor rotation of each revolving stage either for all connected motors simultaneously or individually for each stage can be controlled. Reached frequency and direction is indicated by LEDs on the panel and the system can be safely shut down using the CENTRAL STOP button. Enclosure is made with a built-in ventilation and built-in RFI filter for compliance with EMC standards.

Enclosure for technological line of folding boxes has an installed frequency converter for control line drive and frequency converter drive for unloading lines. The vibrator loader on the line is controlled by the original single-phase frequency converter. The control system in the control cabinet controls the operation of the entire line. It processes information from the actuator limit switches unloading lines and lines of photocells, control consoles and motor protection switch. The whole system can be shut down by central stop button on the line. For visualization and control of the system, the enclosure was supplemented by the control panel.

Converter with built-process PID controller regulates the pressure in the system to the desired value. At zero water intakes converter turns off aically to save electricity. When the pressure drops below the preset value, converter is aically started and begins pumping to increase the pressure.

DC power supply for feeding the trollery wire for TLP class locomotives. One of several output voltages can be user: (UOUT1=1x325VDC, UOUT2=1x275VDC, UOUT3=1x225VDC). This rectifier is equipped with the line monitoring relay, so in case of grid failure the DC supply is turned on to increase safety.

The compressor manufacturer in the Slovak Republic has had to solve the problem of testing its products for markets with 60Hz frequency. Based on its requirements, a special aingle-phase artificial AC mains was designed and manufactured to test hermetic compressors and condensing units. Output alternating single-phase voltage is measured by a special measuring circuit which is connected as a feedback in the output voltage control circuit and therefore the setpoint of the output voltage is maintained regardless of the load value. The generated grid voltage at the output of the grid is fine tuned by the potentiometer within a specified range. The output AC voltage and current of each output branch is displayed on the digital displays.

The single-phase photovoltaic hybrid system with the household consumption covering feature was installed. In case of power failure and sufficient battery capacity, the plant is able to backup the appliances in the one phase - inverter instantaneously and smoothly enters off-grid mode.

The need to reduce the cost of the house and feed the electricity surplus into the grid, the need for remote monitoring of the inverter + status messages over e-mail was addressed as follows: Inverter FOTO CONTROL 230 / 375 DC operates in on-grid mode. RM WEB module is used for the monitoring of the power plant.

FOTO CONTROL 1f 230/375 DC inverter is used as an electronic MPPT controller of AC coil power. This solution increases the energy yield by 30-40% comparing to the standard switch. In addition to this, aic switching of external load after exceeding preset power is possible. .

Complete customer solution: project, development, production, installation at customer in iron ore-mine. Main traction electropart of coal-mining locomotive is solved by two asynchronous motors 75kW, controled by vector frequency converters (system HDDis), feeded from single direction trolley. Subsidiary circuits are hydraulic system, cooling system,sand-blasting system. Control system controls all circuits and enables to control two interconnected locomotives from one station. This solutions is accomodated with visual system.