Safety Provisions

Introduction

Before performing work on the unit, 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 Vacuum Circuit Breaker (VCB) is in OFF/OPEN condition, the Earthing Switch (E/S) is closed, and access is locked. Follow the LOTO process to perform any work on switchboard. Install barriers, and cables 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 Vacuum Circuit Breaker (VCB) is in OFF/OPEN condition, the Earthing Switch (E/S) is closed, and access is locked.
Follow the LOTO process to perform any work on switchboard.
Install barriers, and cables 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.

Applicable Standards and Regulations

The applicable standards and regulations are as follows:

Applicable Standards and Regulations

Description	IEC standard
Switchboard	IEC 62271-200 IEC 62271-1
Behavior in the event of internal faults	IEC 62271-200
Earthing switch	IEC 62271-102
Ring switch	IEC 62271-103
Circuit breaker	IEC 62271-100
Current transformer	IEC 61869-2
Voltage transformer	IEC 61869-3
Voltage presence indication system	IEC 62271-206
Voltage detection and indication system	IEC 62271-213
Protection against accidental contacts, foreign bodies and ingress of water	IEC 60529
Basic and safety principles for man-machine interface, marking and identification	IEC 60445
Ground mounted distribution substation RMU and Extensible switchgear (Rated 12–24 kV)	ENA TS_41-41_301197

NOTE:

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

Environmental and Operating Conditions

The operating conditions for the installation of standard Ringmaster AirSeT unit to meet the normal service conditions are as defined by IEC 62271-1, clause 4.1.3. Refer to the below Table – Environmental Specifications.

Environmental Specifications

Environmental Specifications	Values
Ambient Air Temperature	≥ -25 °C to ≤ +45 °C
Ambient Air Temperature	≤ +35 °C on average over 24 hours
Surface Temperature	≤ +60 °C
Altitude	≤ 1000 m above sea level⁽¹⁾
Solar Radiation	≤ 1000 W/m²
Ambient Air Pollution	Site Pollution Severity (SPS) class medium as defined by IEC TS 60815-1: 2008
Ice Coating	≤ 20 mm
Wind Speed	≤ 34 m/s
Absolute Humidity	Relative humidity can reach 100% when absolute humidity is 30 g/m³, leading to possible precipitation or condensation.
Rain Intensity	≤ 15 mm/m with a driving rain < 18 m/s
⁽¹⁾ At higher altitudes, de-rating might be necessary according to the functional units and/or the installation altitude. For more information, refer to Installation Altitude.

Behavior in Case of Incidents

In the event of an internal arc fault, theRingmaster AirSeT unit is equipped with pressure relief flaps or exhaust ducts designed to help safely vent the resulting gases.

This operation and maintenance manual guide does not include information regarding the safety of buildings in case of internal faults (pressure load of the unit room and necessary pressure relief flaps). Pressure calculations for the unit rooms, including recommendations for pressure relief ducts, are available upon request for a fee. For more information, contact the licensed partner or Schneider Electric.

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

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