Safety Provisions

Before performing work on the cubicle, it is essential that you comply with the following instructions:

DANGER
HAZARD OF electric shock, explosion, or arc flash Before removing covers and performing assembly or maintenance work: Ensure that the system is isolated from high voltage, supply voltage, and properly grounded. Ensure that the VCB/Contactor is in test condition, the Earthing Switch (E/S) is closed, and access is locked. Follow the Lock Out Tag Out (LOTO) process to perform any work on switchboard. Install barriers, cables, and polycarbonates in accordance with the design specifications wherever necessary. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF electric shock, explosion, or arc flash

Before removing covers and performing assembly or maintenance work:

Ensure that the system is isolated from high voltage, supply voltage, and properly grounded.
Ensure that the VCB/Contactor is in test condition, the Earthing Switch (E/S) is closed, and access is locked.
Follow the Lock Out Tag Out (LOTO) process to perform any work on switchboard.
Install barriers, cables, and polycarbonates in accordance with the design specifications wherever necessary.

Failure to follow these instructions will result in death or serious injury.

WARNING
HAZARD OF MOVABLE PARTS IN MECHANICAL DRIVES Before performing mounting and maintenance work, comply with the below safety rules: Isolate from the supply voltage. Release the energy-storing device of the VCB by performing the OFF-ON-OFF operation. Activate the make-proof E/S to ON position, to ensure that the equipment is ready for use (if any). Do not remove the mechanisms during maintenance work. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

HAZARD OF MOVABLE PARTS IN MECHANICAL DRIVES

Before performing mounting and maintenance work, comply with the below safety rules:

Isolate from the supply voltage.
Release the energy-storing device of the VCB by performing the
OFF-ON-OFF operation.
Activate the make-proof E/S to ON position, to ensure that the equipment is ready for use (if any).
Do not remove the mechanisms during maintenance work.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING
HAZARD OF SHARP-EDGED SHEET METAL AND METAL PARTS During installation and maintenance work, comply with the below safety rules: Apply appropriate PPE and follow safe electrical work practices. See standards or local equivalent. Always cover sharp edges. Failure to follow these instructions can result in death, serious injury, or equipment damage.

CAUTION
HAZARD OF INAPPROPRIATE HANDLING, STORAGE AND INSTALLATION Respect the handling rules and avoid any shocks to the device. Perform the maintenance and servicing operations described in the maintenance section of this guide. Observe the normal service conditions described in this guide. Before the VCB is installed in its final location, ensure that the storage conditions for the MCSeT equipment and the VCB are complied. Failure to follow these instructions can result in injury or equipment damage.

CAUTION

HAZARD OF INAPPROPRIATE HANDLING, STORAGE AND INSTALLATION

Respect the handling rules and avoid any shocks to the device.
Perform the maintenance and servicing operations described in the maintenance section of this guide.
Observe the normal service conditions described in this guide.
Before the VCB is installed in its final location, ensure that the storage conditions for the MCSeT equipment and the VCB are complied.

Failure to follow these instructions can result in injury or equipment damage.

Applicable Standards and Regulations:

The applicable standards and regulations are as follows:

Metal-enclosed AC switchgear for rated voltages > 1 kV up to including 52 kV: IEC 62271-200, Common specification: IEC 62271-1.
The locally applicable accident prevention, operating, and work instructions should be complied.
Assembly and maintenance: IEC 61936-1/EN 50522
.
Operation of electrical equipment: EN 50110-1
.
Loss of service continuity: IEC 62271-200: LSC 2B-PM.
Type-tested.
Tested for Internal arc classification up to A-FLR upto 40kA, for 1 s.
Dimensioned for indoor installation.

NOTE:

The national standards applicable in the country where the equipment is to be installed should be complied.
Other standards or regulations have to be checked and accessed locally.

Table 1 Applicable Standards and Regulations for MCSeT Cubicles

Designation	IEC Standard
Switchgear	IEC 62271-200
Switchgear	IEC 62271-1
Internal arc classification (IAC)	IEC 62271-200
Circuit breaker	IEC 62271-100
E/S	IEC 62271-102
CT	IEC 61869-2
Voltage Transformer (VT)	IEC 61869-3
Voltage detecting systems	IEC 61243-5
Protection against accidental contact, foreign bodies and water	IEC 62271-200
	IEC 60529
High-voltage fuse link	IEC 60644
High-voltage fuse link	IEC 60282
Measuring relays and protection equipment	IEC 60255

Table 2 Degrees of Protection According to IEC 62271-200 and
IEC 60529

Description	IPX Rating
Degree of protection of the switchgear enclosure	IP4X⁽¹⁾
Degree of protection between the compartments of the cubicle	IP2X
⁽¹⁾ Other values are available on request.

Environmental and Operating Conditions

MCSeT is an indoor switchgear and may only be operated under normal conditions in accordance with IEC 62271-1.

Operation under conditions deviating from these is only admissible subject to consultation with and written approval from the manufacturer.

Table 3 Operating Conditions

Description	Values
Temperature class	-5 °C, indoor⁽¹⁾
Ambient temperature minimum/maximum	-5 °C/ +40 °C⁽¹⁾
Average value over 24 hours	≤ 35 °C⁽¹⁾
Mean relative air humidity: 24 hours/1month	≤ 95%/≤ 90%
Installation altitude above sea level	≤ 1000 m⁽¹⁾
⁽¹⁾ Other values are available on request.

Behavior in Case of Incidents or Accidents

If an internal arc fault occurs, the MCSeT switchgear is equipped with pressure relief absorbers or ports to help prevent the cubicles and switchgear from being blown off.

This user and maintenance guide does not include information regarding the safety of buildings in case of internal faults (pressure load of the switchgear room and necessary pressure relief ports). Pressure calculations for switchgear rooms, including recommendations for pressure relief ports, are available upon request for a fee. For more details, contact Schneider Electric.

In case of fire or internal faults, toxic and caustic decomposition products are produced. Comply with the locally applicable accident and safety provisions.

Make sure that the first-aid measures are taken in case of injury to persons.