Salicru EMi3 User Manual

EMi3

Servomotor voltage stabiliser 5 kVA - 1300 kVA

EMI3: Constant stabilisation and savings in
overvoltages

Issues such as the constant variation of loads connected to the mains,
interference generated by the loads themselves, possible failures in
distribution lines, voltage drops due to the length of the lines and
problems caused by lightning make it impossible to have an electricity
supply with a stable voltage. Salicru’s EMi3 servomotor voltage
stabilisers are the ideal solution to protect sensitive equipment from
constant voltage fluctuations in the power supply.

Moreover, in the event of drops in the total consumption of a power
line, voltage tends to rise, causing overconsumption in the equipment
that remains connected. By using a stabiliser, overconsumption
can be eliminated, thereby producing significant cost savings and
ensuring that connected loads function within the voltage range for
which they were designed.

The operating principle is based on regulation, by means of a control
circuit, of the variable autotransformer that supplies the voltage
for the booster transformer in series, either in phase or in phase
opposition, to achieve the rated value of the output voltage.

Applications: Effective protection for all types of
critical load

Actions and operations in electrical substations, electric ovens,
numerical controls, lifts, graphic printing equipment, production lines,
medical equipment, TV repeater stations, machine tools (milling
machines, trimming machines, presses, lathes, polishing machines,
electrical discharge machines, etc.) are some of the applications,
because of their power, extremely reactive nature and high sensitivity
to voltage variations.

Performances

∙ Power range, single and three-phase, up to 1300 kVA.
∙ Fast and efficient toroidal autotransformers for the entire power

range.
∙ Output accuracy better than 1% (adjustable).
∙ In three-phase units, independent regulation per phase, unaffected

by imbalances.
∙ Input regulation range ±15% standard.
∙ High efficiency, up to 97.5%.
∙ High speed regulation, up to 70 V/s.
∙ Full LCD display for stabiliser control and monitoring.
∙ Guaranteed output stability through a MosFET servo control.
∙ Unaffected by line voltage harmonics; stabilisation based on true

RMS.
∙ Stable operation in the event of load and/or voltage variations.
∙ Wide operating temperature range (-10°C to +55°C).
∙ Dry contact interface (2 standard and up to 11 optional).
∙ No harmonics injection.
∙ Mechanically-optimised design, easier maintenance.
∙ Transient overloads of up to 1000% of the rated admissible.
∙ Highly robust and reliable (high MTBF).
∙ Quiet operation.
∙ Overvoltage surge supresion protection.
∙ More than 80% recyclable materials.

Display

1. LCD 2x16 characters.

2. Navigation keys.

3. LEDs (alarm, bypass, normal operation

and communications).

Communications

1. Slot for remote management or RS-232
interface.

2. RS-485 serial ports. MODBUS
communications protocol.

3. Programmable dry contact interface (x5).

4. Digital input.

Options

∙ Output current, power and overload

measurement.

∙ Maximum and minimum output voltage

protection.
∙ Manual and automatic bypass.
∙ Overload contactor.
∙ Communications and relay module.
∙ Other regulation ranges.
∙ Galvanic isolation transformer.
∙ Output circuit breaker.
∙ Extended ambient operating temperature

from -20ºC.