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NHSTAR POWER SYSTEMS
HANDBOOK & TECHNICAL GUIDES

DIESEL GENERATOR & POWER ENGINEERING KNOWLEDGE

Comprehensive technical analyses from NHSTAR engineering specialists: Sizing standby power calculations, comparing Cummins, Perkins, Doosan engines, and generator synchronization solutions.

FREQUENTLY ASKED QUESTIONS ON OPERATION & GENERATOR ENGINEERING

How often should oil and filters be changed for industrial diesel generators?

The initial oil change is typically after the first 50 operating hours (break-in run). Subsequent periodic oil changes are required every 200 – 250 operating hours or every 6 months, whichever occurs first.

What is the transfer time in seconds for an automatic ATS transfer switch?

Typically, the entire duration from utility grid failure -> engine crank signal -> generator reaching rated 400V voltage and 50Hz frequency -> ATS contactor transfer takes approximately 5 – 10 seconds.