INTEGRAL® – Comprehensive solution for protecting small sites

All-in-one solution for comprehensive low-voltage installation protection. The INTEGRAL® range is the solution to electrical issues in small and medium installations, featuring highly sensitive equipment, such as bank branches, medical offices, medical analysis laboratories, etc. It improves the continuity of electrical service, preserves installed equipment, including inverters, and enhances their lifespan.

Several breakdowns regularly affect the equipment installed in sites connected to the low-voltage network of electricity distributors: bank branches, medical offices, laboratories, office buildings, small telecom or broadcasting sites, etc., causing service interruption or even the destruction of sensitive equipment such as ATMs, medical equipment, transmitters, PCs, and LED lighting.

Even the installation of double-conversion online uninterruptible power supplies does not solve the majority of these problems. Worse, UPS units are among the first to suffer from these phenomena.

Applications :

Bank branches
Medical analysis laboratories
Medical offices, clinics
Offices, professional practices
Shops and stores
Remote sites or rural areas

These disturbances often originate from external sources but can also be internal in some cases. They can come from:

Voltage variations from the mains: voltage sags, undervoltage, or interruptions
Transient overvoltages coming through the site’s power line due to disturbances in the network (line accidents), switching surges, or neighboring protection tripping (short circuits)
Temporary or permanent overvoltages caused by the neutral conductor cut-off provided by the energy distributor
Temporary or permanent overvoltages caused by uncorrected faults or ground leaks in the neighborhood or internally
Indirect lightning strike: penetration of lightning current through the ground, step voltage
Nuisance tripping of differential protections due to atmospheric disturbances or harmonic pollution: thunderstorm, early rains, DC component in the AC network, parasitic voltages, etc.
Parasitic voltages from the protective conductor (usually caused by the presence of frequency converters, photovoltaic inverters, etc., in the installation) causing malfunctions in IT equipment and/or data transmission.
Etc.

All-in-one solution for comprehensive protection of low-voltage installations

MEIER ENERGY offers the INTEGRAL® range, a unique solution on the market, designed to comprehensively protect low-voltage electrical installations for professional subscribers.

Very easy to install and use, this plug-and-play solution, based on static voltage regulator-stabilizers equipped with protections against transient surges, permanent surges, neutral disconnections, voltage dips, ground leakage currents, also ensures protection against third-order harmonics and earth leakage currents. It helps preserve electronic equipment and optimize their lifespan, while bringing substantial energy savings in the majority of cases.

Main features:

A static voltage stabilizer-regulator block ensures protection against fluctuations in the electrical network voltage and compensates for voltage sags, undervoltage, and a significant portion of micro-cuts. It also protects equipment against permanent or temporary surges coming from the external line, while ensuring a very stable voltage for the equipment (+/- 1 to +/-3% depending on the configurations), thereby enhancing their lifespan.
The option to choose the nominal output voltage between 210 and 240V +/- 3% (voltage regulator function) is available.
An isolation transformer with an electrostatic shield is provided to protect against overvoltages caused by coupling phenomena and the flow of fault currents from the external network. Additionally, it safeguards the installation against overvoltages resulting from the neutral conductor being disconnected by the energy distributor.
A passive filter is included to block the third-order harmonics generated by LED lighting, single-phase frequency converters, as well as switch-mode power supplies that power most electronic equipment (desktop PCs, printers, screens, etc.).
A type 1+2 surge arrester is included for protection against transient switching surges and lightning strikes.
An LC filter is included to protect against high-frequency parasitic voltages from the ground network.
A magnetic-thermal circuit breaker is installed at the input and output of the equipment for protection against overcurrents.
A manual bypass switch for maintenance is included.

Easy installation:

Other optional features:

Automatic Bypass Contactor, which bypasses the regulator-stabilizer block automatically in case of internal failure, while keeping all the protections listed above active.
Intelligent differential protection relay with front-facing display of earth leakage current, for the protection of people and equipment against indirect contacts.
Output protection circuit breaker with automatic re-closing. This function can be crucial in cases such as pharmaceutical laboratories or bank branches that need to operate critical machinery during nights and weekends (automated systems, servers, ATMs, etc.). 7 out of 10 triggers are often due to transient phenomena (early rains, atmospheric disturbances, etc.) and do not require repair. So, all you need to do in these cases is to reset the differential protections.
RS485 communication port with Modbus protocol allows integration of the equipment into SCADA supervision systems, Building Management Systems (BMS), or energy management systems.

The insertion of the INTEGRAL® voltage stabilizer-regulator into the existing installation is quick and easy. Simply insert it between the main circuit breaker of the site (or the one at the point of protection) and the low-voltage main switchboard of the site (or the electrical panel of the section to be protected).

Grounding can be done directly on the existing mass earth network or with the help of a dedicated new earth pit.

Technical specifications:

Power range from 3 kVA single-phase to 250 kVA three-phase (other powers available upon request)
Very wide range of input voltage ranges: from +/- 15% to -60% / +40%
Compensates for three-phase and single-phase voltage sags up to 60% depth (-25% standard)
Protects against surges up to +40% (+15% standard)
Galvanic isolation
Microprocessor-controlled technology with no maintenance required
Response time less than 3 ms
Supports overload of 200% for 200 ms, 150% for 10 seconds, and 125% for 3 minutes
High efficiency: up to 93%
Manual bypass to transfer the load directly to the grid
LCD display on the front panel for monitoring key parameters (phase voltage, % load, alarms, etc.)
Magneto-thermal protection circuit breakers at the input and output of the unit
Industry 4.0 ready: Capability for supervision and integration into an energy management system, SCADA, or BMS
Made in Morocco

General features
Power (kVA)	Power range from 3kVA to 250kVA (other powers available on request).
Technology	Thyristor Technology, fast voltage regulation, maintenance-free design
Thyristor Configuration	6 Thyristors	8 Thyristors	10 Thyristors

Inputs
Nominal input voltage	Model three-phase: 400V AC three-phase + Neutral + Ground (without neutral)		Model single-phase: 230V AC single-phase + Neutral + Ground
	(Different voltages are available as an option)
Voltage tolerance	Model S : -25%,+15%	Model M : -35%,+15%		Model L : -50%, +15%
Frequency	50Hz +/-5% (60Hz optional)

Outputs
Nominal output voltage	Three-phase model: 400V AC three-phase + Neutral + Ground	Model single-phase: 230V AC single-phase + Neutral + Ground
	(Different voltages are available as an option)
Voltage tolerance	+/-1% to +/-3% depending on the model
Frequency	50Hz +/-5%
Overload capacity	125% 1min. 150% 10sec. 151% and above 0.2 sec
Response time	20msec
Correction time	100msec - 200msec
Efficiency	≥ 93% typical

Management, control, and communication interfaces
Control panel with LCD display	LCD display 4x20 and synoptic diagram Input voltage, output voltage, Load percentage, Frequency, Information and error status, installation parameters
Remote management interface (optional)	Remote management via browser with Ethernet connection (optional) Modbus RTU with RS485 connection (optional)

Protection functions
Voltage protection	Electronic protection for low voltage and high voltage
Current protection	Magnetic-thermal circuit breaker at input and output
Overload protection	Electronic overload protection (1min. at 125% overload, 10sec. at 150% overload, 0.2sec. at overload >151%)
Overheating protection	Electronic protection against overheating (the fan starts at 50°C. The load power is cut off at 80°C.)
Surge arrester	Surge arrester Class-I and Class-II

Environmental conditions
Operating temperature	-10°C ~+50°C
Operating altitude	1.500m
Humidity	90% non-condensing
Acoustic noise	<55dB (at a distance of one meter with closed door)

Cabinet features
Type - Protection class	Interior type IP21: Free-standing modular cabinet. Exterior types IP54 or IP66 (optional).
Paint - Color	Epoxy-Polyester powder coating - RAL 7035
Cooling	Forced air cooling with fan controlled by thermostat