Maintenance
Generator set ratings
5.2 Generator set ratings
The following generator set ratings are defined by the standard ISO 8528-1:2018.
The classifications according to ISO 8528-1: 2018 are intended to help to improve the under‐
standing 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 (COP) is the maximum power, which the generator set can deliver continu‐
ously while supplying a constant electrical load. Continuous power (COP) can be operated for
an unlimited number of hours per year under the agreed operating conditions.
Always observe the maintenance intervals and procedures prescribed by the manufacturer.
5.2.2 Prime Power (PRP)
Prime power (PRP) is the maximum power, which the generator set can deliver continuously
while supplying a variable electrical load. Prime power (PRP) can be operated for an unlimited
number of hours per year under the agreed operating conditions. Over 24 hours, the average
power output cannot exceed 70% of the PRP, unless otherwise agreed by the engine manufac‐
turer.
Always observe the maintenance intervals and procedures prescribed by the manufacturer.
5.2.3 Emergency Standby Power (ESP)
Emergency standby power (ESP) is the maximum power, which the generator set can deliver
during a variable electrical power sequence, in case of a utility power outage, or under test
conditions. Emergency standby power (ESP) can be operated for up to 200 hours per year under
the agreed operating conditions. Over 24 hours, the average power output cannot exceed 70%
of the ESP, unless otherwise agreed by the engine manufacturer.
Always observe the maintenance intervals and procedures prescribed by the manufacturer.
KD62V12 33521030301_8_1 EN_US 2022-09
© 2022 by Kohler Co. All rights reserved.
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