Once you know your rating, the next step is matching it to a real machine. Shandong Huali manufactures diesel generator sets from 8 kVA to 4,000 kVA, in single- and three-phase, at 50 or 60 Hz — so one manufacturer can cover every ISO 8528 rating class.
ESP and DCP sets for hospitals, data centers, and offices that need reliable outage backup. Built for intermittent duty with high output.
PRP sets for construction sites, mining operations, and off-grid facilities that run as the main power source. Designed for unlimited hours of variable load operation.
COP sets for base-load plants, cogeneration, and remote power stations that run around the clock. The most conservative, longest-life rating.
Built around Cummins, Perkins, Weichai, or Yuchai engines paired with Stamford alternators. Every unit is 100% load-tested before delivery.
Shandong Huali Electromechanical Co., Ltd. has manufactured diesel generator sets since 1999, with a range spanning 8 kVA to 4,000 kVA and certified to ISO9001, CE, and CCC. We build standby, prime, continuous, and data-center-rated sets, and we size every unit to the duty cycle you actually run — not to a headline number. Tell us your application, run hours, and required kVA, and our engineers will confirm the correct rating and recommend the right diesel generator set — with no obligation.
A: ISO 8528 is the international standard for reciprocating internal-combustion-engine-driven AC generating sets. Part 1 defines the power rating categories — COP, PRP, LTP, ESP, and DCP — that state how a generator may be used in terms of run hours and load profile.
A: Standby power is the maximum output a generator can supply for limited hours per year during an outage, with no overload. Prime power is the output it can sustain as the primary source for unlimited hours at a variable load. Prime is roughly 90% of standby for the same engine.
A: Continuous power is the rating for a generator that supplies a constant load for an unlimited number of hours per year, at up to 100% load factor, with no overload. It is the most conservative rating and therefore the lowest kW figure for a given engine.
A: Emergency standby power is the rating for a generator that runs only during a utility outage, for roughly 200 hours per year, at an average load not exceeding 70% of its rating, with no overload. It delivers the highest short-term output of any category.
A: Data centre power, added in ISO 8528-1:2018, allows a generator to run for unlimited hours with no load-factor restriction. It is designed for Tier 3 and Tier 4 data centers with high-density, unpredictable loads.
A: No. A standby generator is rated for only a few hundred hours per year. Running it continuously as a prime or base-load source voids the warranty and dramatically shortens engine life. For continuous duty, specify a prime (PRP) or continuous (COP) rated set instead.
A: Load factor is the average load on a generator over a period, expressed as a percentage of its rated output. Continuous and limited-time ratings allow up to 100% load factor, while prime and standby ratings cap the 24-hour average at 70%.
A: Exceeding the rating causes the engine to overheat and wear faster. Continuous, standby, and limited-time ratings allow no overload; only prime power permits a short overload, typically about 10% for one hour in twelve.
