FAQs 2: Do I need an Automatic Transfer Switch (ATS)?

When should I service my generator?

Your Diesel Generator should be serviced every 500 hours or 1 year, whichever comes soonest.

Do I need an Automatic Transfer Switch (ATS)?

An ATS is not essential, however, if the application of the generator is standby to emergency lights or a lift for example, then the ATS will be highly recommended, as it ensures the smooth operation, and switch from mains power to the generator, then once the main power is backup and working, it will transfer the power from the generator.

If for example the generator is being used to run a piece of specific machinery within a workshop, simply using the control module will suffice. You may also not require an ATS if the generator is wired into a switchboard.

What is the difference with 1500RPM and 3000RPM and why is there a considerable cost difference when they both produce the same power?

RPM means revolutions per minute. This is the engine speed and not the engine kVA rating. Your generators can be both 20Kva, yet one could be 1500RPM and the other 3000RPM. They are both suited for different applications. A 1500rpm set can be used for both Prime power and Standby power. The engine speed is slower than a 3000rpm meaning that the engine is not being overworked and can produce the power required in a calmer fashion.

Also, 1500RPM sets are a lot quieter compared to a 3000RPM set as they vibrate a lot less. If you require a generator to run for short periods of time, and not as emergency or critical power, then a 3000RPM Set is best suited for your application. Should you need your diesel engine to run more than 1 hour at a time, it is always best to purchase a 1500RPM set as opposed to a 3000RPM set.

Are diesel generators just used for Standby / Emergency power or can they be run as Prime Power?

Generators can be used as both Prime Power or Standby Power. You may see on our brochures that our generators are rated for prime and standby, yet the kVA rating differs. This is because we rate all our generators at 100%. Yet our Diesel engines can take a spike load for up to 1 hour at 110% or what we call Standby power. Our Diesel generators are all 1500rpm rated, this means that they can run for long periods of time for applications that either need critical power for several hours or they can just run for standby whilst you get the mains load back on. We would always recommend that you service your generator for 250 hours or 500 hours depending on the engine (please read the engine manual) and well looked after for prime running sets. 

Can a Diesel generator be used outdoors?

The simple answer is yes, as long as it is housed in a weatherproof canopy. Things to be made aware, your generator will need to release hot air. Otherwise, the engine will overheat. Canopies will have an air grill on the top side of the generator enclosure and this will allow some water ingress but minimal. Once the generator runs this water ingress will either be pushed out of the canopy or during the heat of the engine, the water will evaporate. It is always best to run your generator often anyway even if this is a standby set. So yes it can be left outside but of course, run it often and ensure that if possible ensure that there is a possible rain cover for harsh weather conditions.

Whats the difference between three phase (3PH) & single phase (1PH)?

Single-phase is made of 3 cables, live, neutral and earth, 1PH is usually between 120-240V depending on whereabouts in the world the generator is being shipped. In most of the 50HZ countries, the domestic household is 1PH supplied.

Three-phase is made of 5 cables, 3x live, a neutral and earth, same as 1PH, the voltage depends on the region, but typically between 380 – 440V, 3PH is typically used commercially in hospitals, hotels, etc.