extronics iUPS101, Руководство по эксплуатации

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Operating Manual
10
3.2 Fitting the Cables
Warning! Installation to be by skilled electricians and instructed personnel in
accordance with national legislation, including the relevant standards
and, where applicable, in accordance with IEC 79.17 on electrical
apparatus for explosive atmospheres.
3.2.1 Grid-connected emergency systems
The UPS can be used as an emergency system, also known as an uninterruptible
power supply (UPS) – enabling a reliable supply to a site connected to an unreliable
network. In the event of an interruption to the energy supply from the public grid, the
UPS, connected to a battery, substitutes the faulty source and enables a support
supply to the users connected downstream.
These will be supplied as long as the energy stored in the battery allows. The battery
will quickly be recharged at the next reconnection to the public grid.
The AC input to the iUPS101 unit must be powered via an external site circuit
breaker/switch to allow disconnection of the power. This should be located close to
the unit and be suitably marked to identify it as the isolating device for the iUPS101
unit.
The use of the UPS must be carried out by qualified personnel who have been
checked by the responsible local authorities. The applicable local standards and
regulations must be adhered to.
3.2.2 Distributed Minigrid
The implementation of the UPS on top of a distributed minigrid requires special care
in choosing the distribution system. A TT distribution is recommended for the DC grid
as well as for the AC grid.
Warning! The IT system (Power distribution system which is isolated from earth) is
not recommended for the distribution. This distribution is generally
forbidden by local laws
3.2.3 Earthing system
The UPS is a protection class I unit, which is intended for cabling in a grid type TT,
TN-S or TNCS. The earthing of the neutral conductor *(E) is carried out at a sole
installation point, upstream of the RCD circuit breaker *(D).
*(E) Earth-neutral connection bridge:
The neutral is earthed at a single point of the installation, downstream of the source
and upstream of the protection device(s) at the default current (DDR). When several
sources are available, each source must have an earthed neutral. If the source has to
be retained with an isolated earthling system (IT) the applicable local provisions and
regulations must be applied.
*(D) Differential circuit breaker:
A protection device must be installed downstream of the source according to the local
requirements and in compliance with the applicable regulations and standards.