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

Definition

Jacket Water: Engine cooling water circulating around cylinders. J1939: SAE CAN bus protocol for diesel engines. Kilovolt-Ampere (kVA): Apparent power (volts x amps / 1000). Kilowatt (kW): Real/active power. Knock: Abnormal combustion (detonation). Lagging Power Factor: Inductive load, current lags voltage. Leading Power Factor: Capacitive load, current leads voltage. Load Bank: Artificial electrical load for testing. Load Factor: Average load / rated load (percentage). Load Shedding: Disconnecting non-critical loads. Load Sharing: kW/kVAR distribution among paralleled sets.

Generator Glossary J-L — Diesel Generator Terms & Acronyms

Jacket Water: Engine cooling water circulating around cylinders. J1939: SAE CAN bus protocol for diesel engines. Kilovolt-Ampere (kVA): Apparent power (volts x amps / 1000). Kilowatt (kW): Real/active power. Knock: Abnormal combustion (detonation). Lagging Power Factor: Inductive load, current lags voltage. Leading Power Factor: Capacitive load, current leads voltage. Load Bank: Artificial electrical load for testing. Load Factor: Average load / rated load (percentage). Load Shedding: Disconnecting non-critical loads. Load Sharing: kW/kVAR distribution among paralleled sets.

TermCategoryDefinition
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Example 2CategoryDefinition text
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AbbreviationFull FormContext
ABCAlpha Beta CharlieIndustry standard
DEFDelta Echo FoxtrotTechnical specification
Related StandardOrganizationScope
Standard AOrg AIndustry governance
Standard BOrg BTechnical compliance

Key Takeaways

Quick Reference

Related Terms

Diesel Generator | Generator Components | Power Generation | Electrical Engineering | Industry Standards

Frequently Asked Questions

What is common rail injection?
Common rail maintains constant high fuel pressure (up to 2500 bar) with electronically controlled injectors. Benefits: precise timing, better atomization, lower emissions, 5-8% fuel savings.
What is a transfer switch (ATS)?
An ATS automatically switches load between utility and generator. Types: open transition, closed transition (make-before-break), soft-loading. NFPA 110 requires <10 sec transfer.
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 a turbocharger?
A turbocharger uses exhaust gas energy to compress intake air, increasing engine power density 30-50%. Critical for modern high-output diesel engines.
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 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.
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 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 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 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 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 biodiesel?
Biodiesel is renewable fuel from vegetable oils or animal fats. B20 compatible with most diesel engines. B100 requires engine modifications.
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.

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