Glossary; Safety And Qualification Of Personnel; 8.2 Abnormal Operating Conditions - Eaton Power Xpert UX 12 User Manual

Glossary

8 Glossary
8.1 Safety and qualification of
personnel
European standard applicable
Standard applicable: EN 50110-1, chapter 4 'Basic
principles'. This paragraph sets out the main
requirements for safe operation as regards personnel.
Supplier:
Eaton. or its representative.
User:
The person or body responsible for operation and
maintenance of the switchgear
Competence
The following requirements apply to operating personnel:
Operating personnel shall be 'competent'. A
COMPETENT PERSON has relevant training and
experience so that he or she is capable of preventing
dangers which may be caused by electricity, for instance
during switching operations.
Operating personnel must hold a written certificate of
authorisation to perform switching operations signed by
the management of the (power) company involved.
Responsibility
It must be clear who is responsible for operations.
All operations come within the area of responsibility of
the WORK OPERATIONS MANAGER (this person must
be designated in accordance with EN 50110-1 as the
person responsible for control of operations).
An INSTALLATION MANAGER must be appointed (in
accordance with EN 50110-1 the INSTALLATION
MANAGER is directly responsible for operation of the
installation). If two or more installations are in close
proximity to each other, it is essential that appropriate
arrangements are made between the INSTALLATION
MANAGERS.
The responsibility which persons have for the safety of
those involved in the operations, and of those who (may)
have to deal with the consequences of the operations,
must agree with national legislation.
Before operations are begun, while they are being
carried out and prior to commissioning of the installation,
the WORK OPERATIONS MANAGER must ensure that
all requirements, rules and instructions are complied
with.
Communication
Before starting operations, the INSTALLATION
MANAGER must be informed of the intended operations.
See EN 50110-1 § 4.4 for additional requirements.
Instruction
All personnel involved in operations carried out on, with
or near electrical installations must have been instructed
(using these operating instructions) concerning the safety
requirements, safety rules and operating instructions
applicable to operating the installation.
Clothing
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Power Xpert
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UX with W-VACi circuit breaker 6063308 G01 01 14 July 2011 www.eaton.com
Personnel must wear suitable clothing that fits the body
closely.
Local rules and regulations
Of course, local rules and regulations (including
operating instructions) must be followed.

8.2 Abnormal operating conditions

Rated voltage, current, power
The voltage, current, and power upon which the design
of the switchgear is based.
Short-circuit:
An unintentional connection between two or more
electrical conductors, or between a conductor and earth,
in which extreme heat may be generated which may
damage the installation and its surroundings.
Short-circuit current:
An electrical current which is higher, as a result of a
short-circuit, than the nominal current.
Arc:
An electrical discharge, through the insulation, which
produces a short-circuit. In general, and in particular in
air-insulated installations, arcing may occur unexpectedly
and be of an explosive nature.