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The Complete Dictionary for Diesel, Hybrid, and Continuous Power Systems
A comprehensive library of definitions, acronyms, and technical phrases used in diesel generator engineering, power management, hybrid systems, and industrial energy solutions.
Electrical current that periodically reverses direction. Most generators produce AC power for commercial and industrial use.
The rotating component (e.g., Stamford alternator) that converts mechanical energy from the diesel engine into electrical energy.
The rate at which the current alternates, measured in Hertz (Hz). Standard in Pakistan: 50 Hz.
The real usable power that performs work; calculated from kVA × Power Factor.
A system that automatically starts the generator when grid power fails and stops it when power is restored.
The ratio of electrical output to mechanical input, usually 90–95% for modern alternators.
The maximum environmental temperature a generator can operate in safely, typically up to 52°C for PowerVision G-Series.
Standby energy supply that operates during grid outages; typically via diesel or hybrid generators.
Keeps starter batteries charged and ready for engine cranking.
The metal chassis supporting the engine and alternator assembly.
Safety device that interrupts power during overcurrent or faults.
Engine cylinder diameter and piston travel distance, determining displacement and torque.
International standards defining engine performance and testing conditions.
Soundproof and weather-resistant housing that reduces noise to ≤70 dB(A).
The apparent power rating of a generator, representing both real (kW) and reactive (kVAR) power.
The highest power output a generator can deliver 24/7 without interruption, used for off-grid or prime operations.
Houses the Deep Sea Electronics controllers for automation, monitoring, and safety.
Combination of radiator, fan, and coolant that maintains safe engine temperature.
Sensor for monitoring current flow and load measurement.
Engine system that releases internal pressure and prevents oil contamination.
Deep Sea Electronics controllers used for automatic mains failure and synchronization.
Internal combustion engine converting fuel energy into mechanical power to drive the alternator.
Reduction in generator capacity due to high temperature, altitude, or humidity (e.g., –3% per 300m above 1000m).
Procedure for verifying generator stability under sudden load application.
Combines diesel with gas or biofuel for efficiency.
Ratio of operating time to total time; continuous, prime, or standby.
Output power divided by input power; a measure of energy conversion.
Ensures generator electronics don't cause electromagnetic interference.
Controls engine speed and maintains steady output frequency.
Certified under Engineering & Contracting – Military Engineering Services (Pakistan) standards.
Emission compliance standards ensuring smokeless, low-NOx diesel operation.
Field current supply to alternator rotor; may be self-excited or brushless.
Amount of diesel consumed per hour at a given load (L/hr).
PowerVision systems use load balancing to reduce consumption by up to 20%.
Cycles of alternating current per second; maintained by the engine speed governor.
Verifies that the generator can deliver its rated capacity safely and continuously.
Variation due to load changes or speed control errors.
Lister Petter industrial diesel engine designed specifically for generator applications.
Generator set: the combined assembly of engine, alternator, and control system.
Process of matching generator output with grid voltage, frequency, and phase before connection.
Electronic or mechanical mechanism ensuring constant RPM.
Connection to earth for safety and surge protection.
Distortions in electrical waveform; can cause heating or equipment malfunction.
Integration of diesel + solar + battery to minimize fuel use and emissions.
Unit of frequency measurement; in Pakistan, most gensets operate at 50 Hz.
Tracks generator operating time for maintenance scheduling.
Load type (motors, compressors) that causes lagging power factor.
Converts DC power from batteries or solar to AC for connected equipment.
International standard defining generator ratings, testing, and performance classes.
Internet-based tracking of generator performance, fuel, and alarms.
Pre-heats engine coolant to aid cold starting.
kW = kVA × Power Factor (typically 0.8).
Unit of energy; 1 kWh = 1 kW for 1 hour of operation.
PowerVision gensets tested for high-altitude operation (3000m) and sub-zero temperatures.
Device for simulating load to test generator performance.
Distributing load across synchronized generators to improve efficiency.
Ratio of actual load to rated capacity (ideal: 70–80%).
British heritage engine manufacturer known for rugged reliability and fuel efficiency.
Circulates oil to reduce friction, wear, and temperature.
Timetable for regular inspection and servicing (daily, 250h, 500h, 1000h).
Disconnects load for safety during faults.
Industrial communication protocol for remote generator monitoring.
Military Engineering Services; certifies and approves infrastructure-related equipment.
Extra capacity needed to start motors due to inrush current.
Acoustic measurement; PowerVision gensets ≤70 dB(A) @ 7m.
Safety connection point between neutral and ground.
Detects low pressure and triggers engine protection shutdown.
Trips breaker if load exceeds rated capacity.
Shuts down engine if RPM exceeds safe limit.
Order of AC phase rotation; important for motor direction.
Ratio of real power to apparent power; typically 0.8 lagging.
Regular, variable load operation (unlimited hours per year).
Scheduled servicing to prevent failures.
Operating multiple gensets together for scalability and redundancy.
Smart system for load prioritization, synchronization, and fuel optimization.
Enables instant power-on for emergency applications.
Heat exchanger that cools engine coolant.
Non-usable power that maintains electromagnetic fields in inductive loads.
Cloud-based telemetry for generator control, alarms, and reporting.
Engine speed; 1500 RPM = 50 Hz output.
Latest generation of Lister Petter diesel G-Drive engines powering PowerVision gensets.
Acoustic canopy-equipped generator ≤ 70 dB(A).
System where solar energy supplements diesel generation.
Backup power available during grid outages; limited runtime rating.
Electrical control system for multi-genset operation.
Premium alternator brand used with Lister Petter engines.
Battery bank that powers the starter motor.
Adjusts engine speed for frequency regulation.
Increases engine air intake and efficiency.
Automatically shifts power supply from grid to generator.
Electrical noise measure; PowerVision gensets < 3%.
Monitors coolant temperature for automatic shutdown.
Provides instant backup before generator startup.
Grid-supplied electricity.
Maintains stable output; via AVR (Automatic Voltage Regulator).
Loss of voltage due to resistance in long cables; must be minimized for heavy loads.
Manages airflow to keep generator room temperature within safe limits.
Basic unit of power, equivalent to one joule per second.
Unburned fuel accumulation in exhaust due to low-load operation.
Copper conductors in alternator generating magnetic fields.
Removes water contamination from diesel fuel.
Technique in hybrid systems to optimize switching efficiency.
Specific power output and duty rating for site conditions.
Every PowerVision generator, from 10 kVA backup units to 2000 kVA continuous systems, is engineered to perform. Use this glossary to deepen your understanding and make informed decisions.