SECTION 5 INSTALLATION - PART 2
5.1 GENERAL
The extent of site installation will depend upon the generating
set build, e.g. if the generator is installed in a canopied set
with integral switchboards and circuit breaker, on site
installation will be limited to connecting up the site load to the
generating set output terminals . In this case reference should
be made to the generating set manufacturer's instruction book
and any pertinent local regulations. If the generator has been
installed on a set without switchboard or circuit breaker the
following points relating to connecting up the generator should
be noted.
5.2 GLANDING
The terminal box is most conveniently glanded on either the
right or left hand side. Both panels are removable for
drilling/punching to suit glands/or glanding boxes. If single
core cables are taken through the terminal box side panel an
insulated or non-magnetic gland plate should be fitted.
Incoming cables should be supported from either below or
above the box level and at a sufficient distance from the
centre line of the generating set so as to avoid a tight radius
at the point of entry into the terminal box panel, and allow
movement of the generator set on its anti-vibration mountings
without excessive stress on the cable.
Before making final connections, test the insulation resistance
of the windings. The AVR should be disconnected during this
test.
A 500V Megger or similar instrument should be used. Should
the insulation resistance be less than 5MΩ the windings must
be dried out as detailed in the Service and Maintenance
section of this manual.
When making connections to the terminals the incoming cable
termination should be placed on top of the winding lead
termination(s) and clamped with the nut provided.
Important ! To avoid the possibility of swarf entering
any electrical components in the terminal
box, panels must be removed for drilling.
5.3 EARTHING
The neutral of the generator is not bonded to the generator
frame as supplied from the factory. An earth terminal is
provided inside the terminal box adjacent to the main
terminals. Should it be required to operate with the neutral
earthed a substantial earth conductor (normally equivalent to
one half of the section of the line conductors) must be
connected between the neutral and the earth terminal inside
the terminal box. Additional earth terminals are provided on
the generator feet. These should be already bonded to the
generating set bedplate by the generating set builder, but will
normally be required to be connected to the site earth system.
Reference to local electricity regulations
or safety rules should be made to ensure
correct earthing procedures have been
followed.
5.4 PROTECTION
It is the responsibility of the end user and his
contractors/subcontractors to ensure that the overall system
protection meets the needs of any inspectorate, local
electricity authority or safety rules, pertaining to the site
location.
To enable the system designer to achieve the necessary
protection and/or discrimination, fault current curves are
available on request from the factory, together with generator
reactance values to enable fault current calculations to be
made.
Incorrect installation and/or protective
systems can result in personal injury
and/or equipment damage. Installers must
be qualified to perform electrical
installation work.
5.5 COMMISSIONING
Ensure that all external cabling is correct and that all the
generating set manufacturer's pre-running checks have been
carried out before starting the set.
The generator AVR controls will have been adjusted during
the generating set manufacturer's tests and should normally
not require further adjustment.
Should malfunction occur during commissioning refer to
Service and Maintenance section 'Fault Finding' procedure
(subsection 7.4).
Warnin
g
!
Caution !