LEGRAND Trimod MCS 10, User Manual

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The command board is connected to a control panel with display from which it is possible to verify the status and setups 

of the EPS and to a communication interface with RS-232 and SNMP connection, dry contacts and logical contacts. It is 

possible to access all the EPS functions from the control panel and communicate through any of the interfaces present 

thereby guaranteeing the redundancy of the peripherals as well. In installations with three separate single phase line on 

output, it is possible to manage each line independently through the software. For example, it is possible to prioritise the 

autonomy of one of them during battery operation. A bypass input line separated from that of the mains input makes it 

possible to supply the bypass with a second power source (the neutral wires of the two lines must be in common).

The technology used in the hardware and the firmware of the EPS represents the current state of the art.

A sophisticated microprocessor-type control optimises the performance both on the Booster/PFC side and on the out-

put inverter. The recharge curve of the battery has been designed to get the maximum useful life and have the greatest 

autonomy possible if the main power goes off. The electronic boards are entirely assembled on LEGRAND automated 

lines and tested to the highest quality standards. Every device goes through an extended period of operation at full load 

before being sent to the customer. 

3.2 

Features

Modular-redundant architecture

The modular-redundant architecture is the best solution for protecting the nerve centres of a company and has the fol-

lowing advantages:

- there is one control of the devices supplied;

- modular expandability;

- module redundancy;

- easy maintenance;

- low running cost;

- compactness.

Efficiency

Trimod MCS concentrates particularly on both the energy absorbed from the mains and the energy provided to the load. 

They are characterised by high efficiency (up to 96%), PF on input>0,99, THDi <3%.

The advantages of a high efficiency are:

- reduction of the power absorbed from the EPS but not supplied to the load and transmitted to the environment as heat;

- less heat loss transmitted to the environment means reducing the need for ventilation or air conditioning systems in the 

installation site;

- no power factor correction cost and so no increase in charges;

- no need to increase the size of any generator upstream of the EPS.

Expandability

Most EPS systems on the market are of the non-modular and non-expandable type thus requiring an initial upscaling of 

the system to make future expansions possible.

The advantages of an expandable system are:

- optimisation of investments for EPS, making them adequate for the current requirements without precluding future 

expansions and avoiding wastes of energy;

- increase in the efficiency of the system thanks to proper sizing.

Reliability

To obtain a level of redundancy with traditional EPS, it is necessary to put at least two in parallel thereby doubling the 

power acquired, the space occupied and the electricity consumed. Trimod MCS modular architecture makes it possible to 

have redundant configurations within a single cabinet.

The advantages are:

- a redundant modularity EPS can be configured as a power redundant N+X system. Even in the case of a fault in a 

module, the equipment continues to function avoiding any downtime;

- clear indications and a large display make it possible to find the fault more quickly;

-  the modular architecture makes it possible to speed up the solution to problems through the simple replacement of the 

faulty module without interrupting the service;

- high percentage of faults resolved at the first attempt.

Power module

The high-efficiency single phase module, available in three power sizes of 3400 VA (PM4), 5000 VA (PM6) and 6700 VA 

(PM7) respectively, and is mainly made up of the following functional blocks: 

- command and control logic (managed by a microprocessor);

- PFC rectifier/booster;

- inverter;

- battery charger;

- automatic bypass.

In each power module there is a microcontroller that can oversee the main functions of the individual unit, monitor its 

correct operation and flag up any malfunctions.

The power module is Plug & Play to make the power expansion and any maintenance operation easier. Every module is 

put in parallel with other identical ones until reaching the power of the EPS.

The modules are independent of each other and can function even if there is a fault in one of them. At the front of the 

module there is a multicoloured LED with traffic-light code green-yellow-red, making it possible to identify the operating 

status of the electronic unit quickly.

3. Technological description