MCC32

MESA Low Voltage Switchboards consist of standardized modular units which can be easily coupled, even if they are of different type.

IMESA manufactures the following types of LV switchboards:

• Motor Control Center “MCC32” with drawable units

The main characteristics of Low Voltage Switchboards are:

• Modular design
• Structural forms according to the regulations
• Internal arc proof version
• Very compact solutions
• Easy installation and maintenance
• Type tests and acceptance tests

Thanks to their characteristics, IMESA Low Voltage Switchboards can offer solutions for any kind of request, always ensuring service continuity, personnel security and the possibility to implement the switchboard in a supervision and control system.

LV Switchboards ensure versatility, they are suitable to be differently installed in main electrical plants such as:

• Industrial (cement, petrochemical, metallurgical and paper factories)
• Production and distribution of electric power (electric power plants, substations, cogeneration, alternative energy)
• Shipbuilding (passenger ships, military ships, merchant ships, platforms)
• Infrastructures (railways, undergrounds, airports)

Electrical Characteristics

Rated Voltage	up to 690 V
Rated insulation voltage	fup to 1000 V
Impulse withstand voltage	6 kV
Rated frequency	50-60 Hz
Rated short-time withstand current (1s)	up to 80 kA
Rated peak current	up to 176 kA
Internal arc withstand current	prevent the internal arc
Busbars rated current	up to 3750 A
Degree of protection
with opened doors	IP20
with closed doors	IP54
standard Structural form	3B, 4A, 4B
Ambient temperature	-5°C + 40°C
Accessibility front and rear accessibility or only with front accessibility

Structural Characteristics

Mechanical structure

The main structure of Motor Control Center “MCC32” consists of:

• pre-galvanised sheet plate bases and roofs
• pre-galvanised sheet plate lateral panels segregations and units metal frames
• painted sheet plate doors

Earthing

Each unit consists of electrolytic copper earthing circuit which connects doors, segregations and dead metal parts of the circuit breakers.

Ventilation

The ventilation of the power equipment installed on “MCC32” switchboards is assured by an effective natural air circulation, through ventilation slots on the front, rear and top of each unit.