Asco Froment 8800 Series, Руководство пользователя

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Chapter One
1 - 12
Load Bank Applications
The main application for a load bank is for use during generator testing. However, load
banks are versatile devices and they have a number of useful applications that can be
applicable during the installation, commissioning and ongoing operation of a generator.
Generating set testing
The specific tests that need to be carried out for a particular installation depend on local
regulations, the application, the type of equipment involved and the requirements of
insurance companies, local authorities and other interested parties.
The requirements for the testing of engine driven generators are described in ISO 8528
part 6. This document explains the general test requirements and describes both a
functional test and an acceptance test. Functional tests must always be done and usually
occur at the manufacturer’s factory. Acceptance tests are optional and are often done on
site, witnessed by the customer or his representative.
ISO 8528 part 5 defines three performance classes - G1, G2 and G3, each with different
criteria:
•
G1 is the least stringent and applies to small generating sets intended to supply simple
loads.
•
G2 is broadly equivalent to commercially available power.
•
G3 is intended for sets which are powering loads which particularly require a stable
and accurate power supply.
A further class, G4, allows for performance criteria agreed between the supplier and the
buyer.
In addition to the testing that is carried out immediately after installation, it is important
to carry out regular tests as part of an ongoing maintenance program. This is particularly
important for emergency power supplies that may have long periods of non-operation.
The type of tests carried out include:
•
Load duration tests (also known as a “heat run”), designed to record steady-state
voltages, frequency, and also to calibrate instrumentation and measure emissions and
fuel consumption.
•
Load acceptance tests, which check changes in frequency and voltage regulation due
to sudden load changes. These tests ensure that the rise and fall of the generator’s
output voltage and frequency remain within limits as load is applied and removed.
Note: The specific
details regarding the
frequency and type of
test required may also
be specified by local
regulations or other
interested parties.