SERVICE · GENERATOR SETS AND TRANSFER SWITCHES

Backup power that works when the grid goes down

A generator or transfer switch that does not work is discovered at the worst moment: when the grid fails. We diagnose, adjust and test generator sets, automatic transfer switches (ATS) and synchronizing and paralleling systems, with each controller's software, and leave the system tested and documented.

Tell us what is happening on WhatsApp How we work

Adjusting a synchronizing and transfer controller with its configuration software during a JAC Engineering service

WHEN DO CLIENTS CALL US?

Problems we solve

🔌The transfer switch does not operate

The grid fails and the generator does not start, does not transfer, or does not retransfer when the grid returns.

🚫The generator will not start or will not generate

Fail to crank, batteries and chargers, loss of excitation, voltage regulator, controller alarms.

⚖️Paralleling that does not share load

One unit takes all the load, absorbs reactive power or trips on reverse power or loss of excitation.

🔁Synchronizing that will not close

Voltage, frequency or phase angle not matching; rough closures; window and timing settings.

⚙️New or replaced controller

Configuration, parameter backup and cloning, inputs and outputs, protections and sequences.

📋Testing and commissioning

Transfer tests under load, start-up protocols and documented system handover.

WHAT WE CHECK

From the engine to the transfer panel

Start, stop, cool-down sequence and alarms
Controller configuration and parameter backup
Transfer logic: timers, interlocks and retransfer
Synchronizing: voltage, frequency, angle and closing window
Active and reactive load sharing in parallel
Voltage regulator, excitation and instrument transformers
Generator protection (reverse power, loss of excitation, overcurrent)
Batteries, chargers and control circuits

We work with controllers from DeepSea, ComAp, DEIF, Caterpillar EMCP (Cat ET) and Cummins PowerCommand, among others. Brands belong to their manufacturers. For Caterpillar units, see also our Cat ET.

HOW WE WORK

From the symptom to a tested system

You tell us what is happeningGenerator and controller brand, alarm or fault, panel photos and, if you have it, the configuration file.
Configuration reviewWe read and back up the controller parameters before touching anything.
On-site diagnosis and adjustmentMeasurements, logic and protection adjustment, with lockout and safe procedures.
Testing and handoverTransfer or paralleling test under load, a report with findings and adjustments, and a backup of the final configuration.

YOU MAY ALSO FIND USEFUL

Learn with our tools

🎓Course: generator sets

Engine, control, regulation and paralleling: how a generator set works (in Spanish).

🔁Course: synchronizing and paralleling

Synchronizing, kW and kVAr sharing, protection and controllers (in Spanish).

🧪Synchronizing simulator

Synchronize a unit, share load and test the protections (in Spanish).

FREQUENTLY ASKED QUESTIONS

Before we start

Do we need a shutdown to check the transfer switch?

The configuration review is done without shutdowns. Transfer tests are scheduled with you in a planned window so operations are not affected.

Do you work with any generator brand?

Yes. What matters most is the controller and its software; we work with the most widely used ones and, if yours is different, we review it with you.

Do you keep the controller configuration?

Yes. Before any change we back up the configuration, and at the end we hand over the adjusted version for your records.

What do I receive at the end?

A report with the diagnosis, adjustments made, test results and the configuration backup.