General instructions
10
NXAIR /
≤ 40 kA
110-0134.9 / 14
2.4
Personal protective equipment (PPE)
For switchgear with proven internal arc classification according to IEC 62271 Part 200, no protective
equipment is required
for operation the switchgear
.
To work on switchgear
where covers have to be removed, personal protective equipment has to be worn
for protection against hot gases exhausting in case of internal arc and protection against sharp edges.
To select the protective equipment, the national standards and specifications of the corresponding
authorities and professional associations must absolutely be observed.
The protective equipment consists of:
•
Protective clothing such as bib overall and long-arm jacket from NOMEX material
(see Internet: NOMEX work clothes)
•
Safety shoes
•
Gloves
•
Helmet and face protection
•
Ear protection
2.5
Due application
The air-insulated medium-voltage switchgear type NXAIR is a type-tested and metal-clad switchgear for
indoor installation, with type of accessibility A and internal arc classification (IAC): IAC A FLR
≤ 40 kA 1 s or
IAC A FL
≤ 40 kA 1 s according to IEC 62271 Part 200.
The switchgear can be used as indoor installation according to IEC 61936 (Power Installations exceeding
AC 1 kV) in lockable electrical service locations. A lockable electrical service location is a room or a place
that is exclusively used for operating electrical equipment and which is kept under lock and key. Access to
such a room is restricted to skilled electricians.
In the basic version, the degree of protection of the enclosure of NXAIR medium-voltage switchgear is
IP3XD according to IEC 60529.
When the switchgear is operated within the technical parameters defined in these instructions, the air-
insulated switchgear type NXAIR is suitable for rated voltages up to and Ur
≤ 17.5 kV and a maximum rated
short-time withstand current of I
k
= 40 kA.
The circuit-breaker to be used in a circuit-breaker panel depending on the panel version must only be either
the Siemens type 3AE1 or 3AE5.
The air-insulated medium-voltage switchgear type NXAIR is suitable for operational switching of AC circuits
in transformer substations of public power supply systems or in industrial plants.
The medium-voltage switchgear NXAIR is available with the following panel types:
•
Circuit-breaker panel
•
Disconnecting panel
•
Metering panel
•
Contactor panel
•
Busbar current metering panel
•
Bus sectionalizer
•
Busbar connection panel
•
Switch-disconnector panel
2.6
Qualified personnel
Qualified personnel in accordance with these Operating Instructions are persons who are familiar with
operation and maintenance of the product and have appropriate qualifications for their work.
Furthermore, qualified personnel must have the following training and instruction or authorization:
•
Training and instruction or authorization to switch on, switch off, earth and identify power circuits
and equipment / systems as per the relevant safety standards
•
Training and instruction regarding the applicable specifications for the prevention of accidents and
the care and use of appropriate safety equipment
•
Training in first aid and behavior in the event of possible accidents
