Maintenance
Generator set ratings
5.2 Generator set ratings
The following generator set ratings are defined by the standard ISO 8528-1.
The classifications according to ISO 8528-1 are intended to help to improve the understanding
between manufacturer and customer.
The power of the generator set is the power output available for consumer loads at the gener‐
ator set terminals, excluding the electrical power absorbed by the essential independent auxil‐
iaries.
5.2.1 Continuous operating power (COP)
Continuous power is defined as being the maximum power, which the generator set is capable
of delivering continuously whilst supplying a constant electrical load when operated for an
unlimited number of hours per year under the agreed operating conditions with the mainte‐
nance intervals and procedures being carried out as prescribed by the manufacturer.
5.2.2 Prime power (PRP)
Prime power is defined as being the maximum power, which a generator set is capable of deliv‐
ering continuously whilst supplying a variable electrical load when operated for an unlimited
number of hours per year under the agreed operating conditions with the maintenance intervals
and procedures being carried out as prescribed by the manufacturer.
5.2.3 Emergency standby power (ESP)
Emergency standby power is defined as being the maximum power, which a generator set is
capable of delivering during a variable electrical power sequence, in case of a utility power
outage, or under test conditions. Emergency standby power can be operated for up to 200
hours per year under the agreed operating conditions.
Always observe the maintenance intervals and procedures prescribed by the manufacturer.
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