Is Your Changeover Switchgear Compatible with a Used Generator
                     IS YOUR 
CHANGEOVER 
SWITCHGEAR 
COMPATIBLE WITH 
A USED 
GENERATOR?
MATCHING PHASES FOR BALANCED POWER 
FLOW
When power cuts strike, all you need is a reliable backup system. Many buyers in the UK turn to 
used generators for sale in the UK since they offer value without costing too much. However, a lot of people overlook whether 
the existing generator changeover switchgear is compatible or not. This checklist focuses on key technical matches as it draws 
from real-world issues that are seen in the field. Get these right, and your setup runs smoothly.
The phase setup is foundational. Most UK homes use single-phase at 230V. Businesses often need a three-phase at 400V. A 
used generator must align with your generator changeover switchgear. Single-phase generators work well with lighter loads. 
Three-phase handle motors and heavy gear are better. Check the generator's nameplate for phase count and then compare it 
to your changeover panel's rating.
An imbalance of over 5% leads to voltage swings, and it stresses windings and reduces lifespan. For used units, inspect for 
rewiring options. Some people allow phase conversion, but it requires expert input. Always verify fuse types: one 100A fuse 
signals single-phase, three indicate three-phase. This match prevents overloads in critical moments.
TACKLING VOLTAGE REGULATION 
CHALLENGES
Voltage stability keeps equipment safe. Used generators may have worn components 
affecting output. Your generator changeover switchgear expects steady levels. Look at 
the automatic voltage regulator (AVR). It boosts low volts or trims highs.
It is a good idea to test the used generator under load and simulate real use to spot 
dips. Older models might lack modern AVRs, causing flicker in lights or sensitive tech 
harm. Upgrade if needed, but confirm switchgear handles the range. Power 
conditioners can help, yet direct compatibility is much better than add-ons.
MAINTAINING FREQUENCY STABILITY IN 
OPERATIONS
Frequency must hold at 50Hz in the UK. Used generators vary by engine speed, and most run at 1500 RPM for 
four-pole sets. This balances efficiency and noise.
Check the governor: mechanical or electronic. It adjusts speed for load changes. Instability causes clock drift or 
motor issues.
Used units with high hours might have governor wear and lead to hunting, where speed oscillates. Your 
switchgear senses frequency for safe switching. ATS panels wait for a stable 50Hz before transfer.
This checklist arms you for smart buys. Phase match avoids imbalances, and frequency hold guarantees 
reliability. Used generators for sale in the UK abound, but compatibility is what seals the deal. Blades Power 
Generation stocks options that meet these needs. Browse our selection and find the perfect match.
GET IN TOUCH
• SALES@BLADESPOWERGENER
ATION.COM
• SALES: +44 (0)1453 799655 / 
821322
DEVEREAUX CRESCENT
EBLEY, ENGLAND, GL5 4PX
UNITED KINGDOM