Booster

Single Phase to Three Phase

8kW Booster™ D, 230V single phase in, 3x 400V 50Hz out

Easydrive specs

Boosters™ single to three phase converters.

Features of Booster™ single to three phase converters:

Motors and machines start fast, even under load.
No need for a larger converter in case of difficult conditions.
Motors and machines produce 100% maximum power.
Power factor correction included.
Balanced sinusoidal three phases.
Maintenance-free.
Protected against all electric and magnetic disturbancies.
Protected against moisture, dust and extreme temperatures.

Booster™ converters:

Starts one or many large or small motors under load.
Largest motor can be any size within the converters thoughput.
Balanced and sinusoidal three phases with correct 120 degrees phase angles.
100% continuous power for all loads including inductive, resistive and mixed loads.
No EMC emmissions due to soft resonant switching. Meets EN55022.
No line disturbancies.
High noise immunity (IEC1000-4-4 and -5)
Copes with overvoltage, short circuits, undervoltage, harmonics.
Produces up to 600% overload power for up to 30 seconds.
High efficiency, average better 95%.
Throughputs 4kW to 64kW (5hp to 85hp).
Available for all world standard grids (IEC, NEMA). 50 and 60Hz.

Booster™ Technology

The Booster is based on digitally controlled thyristor technology.
A Booster™ is maintenance free and offers a very long life time even under rough conditions.
A Booster™ is suitable for workshops, farms, pumping stations, heating, welding or mixed application where the site lacks three-phase supply and within large buildings where all three phases are not close to the equipment location.

* Motors will develop 100% continuous power with 600% overload capacity for hard-starts.
* No contacts to wear, no electrolytic capacitors to dry out.
* Resonant capacitor switching prevents line disturbancies and stress to power lines.
* Available in many countries, for all world voltages and all frequency standards.
* Power factor corrected for lower power bills.
* Low harmonics, low EMC radiation.
* Available with automatic load connection and motor starter (UL requirement).

Booster™ Electronics

Boosters™ are advanced digital single phase to three phase converters based on variable capacitance phase shift technology.

Boosters™ are based on a central electronics module, a set of standard power capacitors and a high efficiency three-phase induction motor used as a rotating transformer.

Boosters™ are maintenance free and offer an extremely long life expectancy, even under rough conditions.

Boosters™ are suitable for workshops, farms, factories or water and oil pumping stations where the site lacks three-phase supply and within large buildings where all three phases are not close to the quipment location.

Booster™ Cost Advantage

Many properties are, for economic reasons, only connected to one of the three phases of utility power available at the nearest distribution transformer.

A single phase supply line was the cheaper option when the premises were built.

Large buildings with three phase supplied might still have locations where it is uneconomic or inconvenient to run three phase wiring.

If three-phase equipment is to be used, a simple comparison can be made: compare the cost for providing three-phase supply (e.g. distribution transformer, power lines, daily or monthly line charges) with the price of a Booster™.

Booster™ Reliability

Boosters™ are maintenance-free. The internal motor- generator is brushless.

High quality bearings are greased for lifetime.

There are no electromechanical contacts in a Booster™ to open or close at full voltage and to wear out

Booster™Loads

A Booster™ will supply a variety of motor loads, resistive loads or mixed loads at full performance.
It has the unique feature of providing up to 600 % boost power for up to 30 seconds to start large motors under load.

Boosters™ are capable of starting several motors under load simultaneously. As if connected to utility supply, motors will reach full speed in the shortest possible time.

Motors will maintain their speed when momentarily overloaded. CNC machines will continue to work when motors stop-start or reverse their directions.

All internal electronic switching takes place as the power waveform crosses zero, avoiding any stress to power lines or components and eliminating harmonics, distortions and line disturbancies.

Booster™ Efficiency, quality of output power

Efficiency at average load is better 92%, usually about 95%. Waveform is sinusoidal.
Shifts between phases are 120 degrees as with utility supplied power.
Output voltage symmetry is better +-5%.
With a Booster™ D even large motors will continuously produce 100% of their rated shaft power.
When motors start, Boosters™ momentarily produce up to 600% of their rated power.
Such boost currents are produced for up to 30 second (stalled motor condition).

Booster™ Applications

Booster™ Robustness

Boosters™ build with power electronics modules are robust and immune from incoming line disturbances, over- and undervoltage conditions and short circuits. They resist incoming line disturbancies and harmonics.
Brown-outs, black-outs, unstable power lines, over and under voltage will not do any harm to a Booster™.

Hard-starts

The unique EuroTech Booster™ converter concept copes well with the most difficult applications:
Metal lathes without clutches, hydraulic systems, refrigeration units, CNC machines, wheel balancers, older types of compressors, deep submersible pumps, conveyors or lifts starting under heavy loads, oil well beam pumps.
A EuroTech Booster™ will cope with start-stop applications and frequent forward-reverse operation.
A Booster™ can also be used with variable speed drives, motor soft starters and all kind of welders.

Compliance

Radio frequency interference and electromagnetic interference are well within legal limits. EuroTech Boosters™ are officially tested for EMC compliance.
They also comply with all applicable emission and radiation standards.
Waveforms are sinusoidal, phase angles are precisely 120 degrees.

Input and Output Voltages

European style (IEC) single phase supply voltage is 230V (in Australia 240V) 50Hz.
460V (Australia 480V) single phase supply can be used optionally.
Output voltages are 3x 400V (in Australia 3x415V).

North American supply voltages (NEMA) are single phase 230V (240V) or 460V (480V) 60Hz.
Output voltages are either 3x 230V (3x 240V) or 3x 460V (3x 480V) 60Hz.

In a Booster™ version D, the output line voltage symmetry is electronically stabilized.
This is required for some inverters (welders, variable speed drives, motor drives) or for balanced heat distribution within motor windings when motors are running continuously under maximum load.

Booster™ Installation

Before installing a Booster™

A guide for Electricians

During startup of the converter or any connected motor or machine, for a short period of time (max. 30 seconds) the supply current can rise to 600% of the maximum nominal input currents.
In order to prevent voltage drops, install a single phase supply cable heavier than actually needed.

Installing the Booster™ close to the switchboard prevents large voltage drops on the supply line.
Install a motor rated fuse (overload switch) in the customers fuse box. Install an industrial single-phase three pin wall switch-socket combination. Install a power cord and a matching plugs.

Motor rated fuses
First value for 230V, second value for 400V and 460V supply:

Booster™ 4kW 20A 10A
Booster™ 8kW 40A 20A
Booster™ 12kW 60A 30A
Booster™ 16kW 80A 40A
Booster™ 24kW 120A 60A
Booster™ 32kW 160A 80A

Switch on:
Do not use fuses larger than shown above. The Booster™ functions well if the internal motor generator accelerates fast (about 0,3 seconds) and the unit runs quietly with the humming noise of a free running motor.
Should you want to measure voltages: Do not measure phases to ground, only phase to phase.

If single phase 230V is needed: only L3 to ground will produce exactly 230V.
Other phases to ground have some offset because the turning point of the three phases is not exactly as utility supplies Neutral.
L3 to L1 will be 400V (Australia 415V) and will follow all input variations. Voltages between L2 and L3 and L2 and L1 is load dependent and will vary between +-10% (Booster™ D +-5%).

Motor rotation and control transformers:
Make sure no current can flow from one of the phases to ground. Measure the resistance on the machines plugs. A resistance between one of the phases and protective ground is a faulty condition and must be fixed first. (Could be a control transformer, see below).
The three-phase outputs of a converter are L1, L2, L3 and protective earth.
Some operated machines have an internal 400V to 24V control transformer.
Find the two phases this transformer is connected to by measuring the coil resistance on the machines plug. In the machines power plug, these two phases must be connected to phase L1 and L3.
Rotate (don't swap) cables in the plug until this condition is met.
Some machines use a 230V to 24V control transformers. Rotate connections L1 L2 L3 in the plug until the transformer is connected between L3 and ground. Connect a motor or a machine and start it briefly. Check for correct motor rotation. If wrong, swap L1 and L3 in the machines plug. Test other motors, machines. Protect motors as you would with utility supply.

Welders:
Some transformer-type welders use two of the three phases only. Make sure you connect these two phases to L1 and L3. Three-phase transformer-type and inverter-type welders: find the control transformer connection as with machines and connect accordingly.

Service:
No maintenance is required. To open: A converter should only be opened by trained service personal. Disconnect from power and wait for at least two minutes until the capacitors to be fully discharged. Internal capacitors are charged with 800VDC. Before doing any work, measure all capacitors if fully discharged.
Do not run a Booster™ when opened. Metal parts (heat sink and large capacitors) carry peak voltages of up to 1200VAC.

Store and operate in dry locations only.



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