UNIFREM 400E
The latest generation of unique small size frequency converters designed for motors up to 3 kW and supply voltage 3 x 400 V.
Differences compared to UNIFREM 400
The latest generation of small-size frequency converters
Differences compared to UNIFREM 400
01. Small dimensions
The UNIFREM 400E represents the latest generation of VONSCH’s unique small size frequency converters.
02. Power up to 3 kW
UNIFREM 400E is predestined to solve most drive problems in applications with motor outputs up to 3 kW.
Characteristics and advantages of UNIFREM E
High fault tolerance
UNIFREM has integrated protections against overvoltage, undervoltage, overcurrent, ground fault, short circuit between phases and thermal overheating. The system reacts to input or output phase failures and the calculation of the thermal integral of the motor prevents overheating, thus increasing the long-term service life of the equipment.
Minimal impact on the power grid
Commutating input chokes, which are an optional accessory, minimize the extraction of higher harmonic currents from the power system (STN EN 61800-3). The use of suppression filters ensures minimal interference to the mains (STN EN 61000-6-4).
Minimal losses
The use of state-of-the-art semiconductor power elements virtually eliminates losses in the inverter, minimizing energy dissipation while reducing interference in and around the power system.
Minimised dimensions
The optimization of the power-designed heat sinks and the strategic placement of the power elements allows to achieve significantly reduced device dimensions without compromising on performance.
High reliability
A new generation of power capacitors with increased temperature range and extended lifetime, together with fans equipped with quality bearings, guarantee long-term reliability and quiet operation of the inverter.
Rich software equipment
UNIFREM E offers predefined motor macros for fast and reliable parameter identification, high quality scalar control with slip compensation, current limit, kinetic backup, soft start and three braking modes. A versatile and fully configurable system of inputs and outputs, including support for PLC functions, PID controller and multi-function sensors, allows comprehensive customization of the device to the user’s needs.
History of events and faults
The configurable system logs up to 256 fault, warning and event records, greatly facilitating equipment diagnostics and maintenance.
Intuitive control
Interactive display listings and a clear parameter structure allow easy setup and monitoring of the inverter via the integrated LCD display, the UNIPANEL control panel or via MODBUS RTU.
Communication with the operator
The intelligent user interface with graphical LCD display provides clear and intuitive setup, making it much easier to diagnose and operate the device.
VONSCH Drive Studio
The innovative VONSCH Drive Studio software allows setting up, diagnostics and archiving of data to a PC. It allows firmware upload, parameter reading and archiving, processing of diagnostic data from the “black box” and display of graphical waveforms, thus simplifying the operation and maintenance of the inverter.
Standard equipment for UNIFREM 400E
Suppression filter
Eliminates interference to the power system (STN EN 61000-6-4)
Brake module
Electronics controlling the switching of the brake resistor when the drive is running in generator mode.
Additional equipment for UNIFREM 400E
Three-phase commutating choke KT1
Minimizes the extraction of higher harmonic currents from the power system (STN EN 61800-3).
MT1 motor choke
MT1 motor output chokes are designed for cases where the cable length between the inverter and the motor exceeds 100 meters for an unshielded cable or 50 meters for a shielded cable. The use of these chokes eliminates the effect of cable capacitance on inverter operation.
Braking resistance BO1
Properly sized BO1 braking resistors allow the frequency converters to efficiently convert the energy from a revved engine during rapid braking or generator operation into heat, thus providing controlled engine deceleration and stopping.
Sinusoidal filter SF1
The sinusoidal filter SF1 filters the output pulse voltages of the inverter into sinusoidal voltages of variable frequency and amplitude. This reduces capacitive current peaks and motor insulation stress. When using a special EMC sinusoidal filter, there is no need to use a shielded cable at the inverter output. However, it is necessary to set the switching frequency of the IGBT transistors to at least 4 kHz.
Technical data
| M ~ constant load | |||||
|---|---|---|---|---|---|
| Inverter type | PNOM motor power [kW] | Nominal. INK converter output current [A] | Maximum. output current of the INK60 converter [A] | Maximum. output current of inverter INK2 [A] | Inverter nominal input current ININ [A] |
| UNIFREM 400E 0750 | 0,75 | 2,2 | 3,3 | 4,4 | 3,1 |
| UNIFREM 400E 1100 | 1,1 | 3,1 | 4,65 | 6,2 | 4,2 |
| UNIFREM 400E 1500 | 1,5 | 4,2 | 6,3 | 8,4 | 5,7 |
| UNIFREM 400E 2200 | 2,2 | 5,7 | 8,55 | 11,4 | 7,0 |
| UNIFREM 400E 3000 | 3,0 | 7,0 | 10,5 | 14,0 | 9,3 |
INK60 - maximum output current of the inverter equal to 1.5 times InK for 1 min every 10 min
INK2 - maximum output current of the inverter equal to 2 times InK for 2 s every 15 s
Do you need inverters in a different frequency?
Dimensions
| Inverter type | height [mm] | width [mm] | depth [mm] | Built-in fan |
|---|---|---|---|---|
| UNIFREM 400E 0750 | 228 | 105 | 122 | No |
| UNIFREM 400E 1100 ÷ 3000 | 236 | 105 | 122 | Yes |
General technical data
| Supply voltage: | 3 x 400 V ±10% |
| Frequency e.g. voltages: | 47 to 63 Hz |
| Output voltage: | 3 x 0 to 100% supply voltage |
| Output frequency: | 0 ÷ 300 Hz |
| Converter efficiency: | more than 97.5% |
| Analog inputs: | 2 analog configurable inputs Possible choices: 0 ÷ 20 mA, 4 ÷ 20 mA, 0 ÷ 10 V, 2 ÷ 10 V auxiliary voltage for potentiometer +10 V (short-circuit proof) |
| Digital inputs: | 4 digitally configurable inputs 1 digital safety input EN 13849-1 category 3 control voltage program selectable + 24 V or 0 V |
| Digital outputs: | 2 digital outputs 24V with SW conf. functions intended for switching on relays or PLC inputs |
| Analog outputs: | 1 analog configurable output 0 ÷ 10 V or 2 ÷ 10 V |
| Engine starting torque: | up to 150% Mn (depending on engine type) |
| Electronic inverter protections: | current overload of the converter, overvoltage in the network, undervoltage in the network, ground connection at the output, short circuit between the output phases, thermal integral of the engine, thermal overheating of the converter, input and output phase failure |
| Cooling: | by natural air flow, built-in fan (from power Pnom=1.1kW) |
| Electromagnetic compatibility (EMC): | Built-in RFI filter for industrial environments according to STN EN 61000-6-4 |
| Elimination of higher harmonic voltages and currents: | external three-phase choke reduces harmonics, extends the life of power capacitors, protects the inverter from overvoltage peaks in accordance with ST EN 61800-3 |
| Ambient working temperature: | +1 °C up to +40 °C ( STN EN 50178 ) |
| Coverage: | IP20 as standard, in switchboard version up to IP55 |
