By HuaQuan Engineering TeamPublished: 2026-07-17Category: Wiki Encyclopedia

Definition

Paralleling: Connecting multiple generators to common bus. Peak Shaving: Reducing peak demand using generators. Permanent Magnet Generator (PMG): Excitation power source. Power Factor (PF): kW/kVA ratio. Prime Power (PRP): Unlimited hours at variable load. Protection Relay: Device detecting electrical faults. PT Fuel System: Cummins Pressure-Time injection. Radiator: Engine cooling heat exchanger. Rated Power: Manufacturer-specified output. Reactive Power (kVAR): Power for magnetic fields. Rectifier: AC to DC converter. Regenerative Load: Returns energy to source. Relay (ANSI Codes): Standardized protection function numbers.

Generator Glossary P-R — Diesel Generator Terms & Acronyms

Q: What is a load bank test?

Load bank testing applies artificial load (75-100%) to exercise generator. Prevents wet stacking, verifies capacity, tests cooling system. Recommended monthly for standby units.

Q: What is NFPA 110?

NFPA 110 is the US standard for emergency and standby power systems. Level 1: life safety (hospitals, high-rise). Level 2: less critical. Defines transfer time, testing, and maintenance.

Q: What is a brushless exciter?

Brushless excitation eliminates brushes/slip rings using rotating rectifiers. Benefits: no brush maintenance, no carbon dust, explosion-proof — standard in modern generators.

Q: What is a standby generator rating?

Standby rating: maximum power for emergency use, 200-250 hours/year max, no overload. Typical for backup applications. Also called Emergency Standby Power (ESP).

Term	Category	Definition
Example 1	Category	Definition text
Example 2	Category	Definition text
Example 3	Category	Definition text

Abbreviation	Full Form	Context
ABC	Alpha Beta Charlie	Industry standard
DEF	Delta Echo Foxtrot	Technical specification

Related Standard	Organization	Scope
Standard A	Org A	Industry governance
Standard B	Org B	Technical compliance

Key Takeaways

A comprehensive glossary is an essential reference for generator industry professionals.
Understanding terminology ensures clear communication between engineers, technicians, and customers.
Industry acronyms and abbreviations evolve — staying current is important for effective documentation.

Quick Reference

Browse all glossary sections: A-C, D-F, G-I, J-L, M-O, P-R, S-U, V-Z
See also: Diesel Engine Glossary, Electrical Engineering Glossary
Reference: Power Generation Abbreviations, Industry Acronyms

Frequently Asked Questions

What is ISO 8528?

ISO 8528 is the international standard for reciprocating internal combustion engine driven AC generating sets. Defines ratings, performance, testing, and documentation requirements.

What is a diesel generator?

A diesel generator converts the chemical energy in diesel fuel into electrical energy. It consists of a diesel engine (prime mover) and an alternator (generator) mounted on a common base frame.

What is genset paralleling?

Paralleling connects multiple generators to a common bus to increase capacity, improve reliability (N+1), and enable maintenance without shutdown. Requires synchronization and load sharing.

What is the difference between kW and kVA?

kW (kilowatt) = real power consumed. kVA = apparent power. kW = kVA x Power Factor. Standard PF is 0.8: 100 kVA = 80 kW.

What is IP rating?

IP (Ingress Protection) indicates enclosure protection. IP44: spray water. IP54: dust protected. IP65: dust tight + water jets. Generator enclosures typically IP44-IP65.

What is wet stacking?

Wet stacking occurs when diesel engines run at <30% load for extended periods, causing unburned fuel accumulation. Prevention: load bank testing at 75%+ load monthly.

What is a load bank test?

Load bank testing applies artificial load (75-100%) to exercise generator. Prevents wet stacking, verifies capacity, tests cooling system. Recommended monthly for standby units.

What is NFPA 110?

NFPA 110 is the US standard for emergency and standby power systems. Level 1: life safety (hospitals, high-rise). Level 2: less critical. Defines transfer time, testing, and maintenance.

What is a brushless exciter?

Brushless excitation eliminates brushes/slip rings using rotating rectifiers. Benefits: no brush maintenance, no carbon dust, explosion-proof — standard in modern generators.

What is a standby generator rating?

Standby rating: maximum power for emergency use, 200-250 hours/year max, no overload. Typical for backup applications. Also called Emergency Standby Power (ESP).

What is a containerized generator?

A containerized generator is a complete genset housed in an ISO shipping container (20ft or 40ft). Provides weatherproof, transportable, plug-and-play power solution.

What is Modbus?

Modbus is an open serial protocol (RS-485) for generator controller integration. RTU mode: registers map to generator parameters. Supported by most controllers.

What is biodiesel?

Biodiesel is renewable fuel from vegetable oils or animal fats. B20 compatible with most diesel engines. B100 requires engine modifications.

What is synchronizing?

Synchronization matches voltage, frequency, phase angle, and phase sequence before connecting a generator to a live bus. Auto-synchronizers control speed and voltage automatically.

What is generator derating?

Derating reduces output for environmental conditions. Altitude: -1% per 100m above 1000m. Temperature: -1% per 10°C above 25°C.

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Definition

Generator Glossary P-R — Diesel Generator Terms & Acronyms

Key Takeaways

Quick Reference

Related Terms

Frequently Asked Questions