USER GUIDE
JEFKVA3.3 • JEFKVA3.0CR • JEFKVA5.0
JEFKVA10.0/S • JEFKVA10.0/3P
USER GUIDE
JEFKVA3.3 • JEFKVA3.0CR • JEFKVA5.0
JEFKVA10.0/S • JEFKVA10.0/3P
Continuous Rating & Maximum Rating
Transformers have a continuous and maximum (intermittent) rating. These devices are designed
to be used to the maximum stated rating for intermittent periods only. These periods are stated
on the specification plate / label on each transformer.
For example: A 3.3kVA transformer can supply up to 3.3kW of power for a maximum of
5 minutes
, then the transformer must be rested (and isolated from the mains supply) for a
further
15 minutes
before it can be reused.
Failure to "rest" the transformer as stated during periods of maximum rated use can cause the
transformer to overheat resulting in potential damage and danger.
Important:
Any damage caused to the equipment by over-loading or over-heating will not be
covered under warranty.
Thermal Overload Cutout
Jefferson transformers are fitted with a thermal overload cutout which will automatically
shutdown/trip the device when overheating is detected. This is a safety device for emergencies
and should not be misused or used to shutdown the device on a regular basis.
The thermal cutout can be manually reset using the reset button when the equipment has had a
chance to cool down.
Before connecting power tools or other equipment to the transformer it is important to check that
the transformer is correctly rated for use. Identify the wattage for the tools you will be connecting
and add them together to assess the total output power required from the transformer.
For every 1000W required from the equipment you connect you will need 1kVA output from the
transformer. Never attempt to use a transformer with a lower output rating than you require.
Where a continuous supply is needed (lighting for example) you need to ensure that the load is
no more than 50% of the transformer's maximum output rating.
You should also take care to ensure that the 16A and 32A sockets are not overloaded, regardless
of the transformer's output specifications.
A 16A socket can supply a maximum of 1700W and a 32A socket a maximum of
3500W.
Note:
"Continuous Rated Tranformers " (also called heater transformers) are designed to be run
on their maximium rated output without needing intermittent rest periods.
Identifying equipment rating
Limited Warranty Statement
Jefferson Professional Tools & Equipment, or hereafter "Jefferson" warrants its customers that its products will
be free of defects in workmanship or material. Jefferson shall, upon suitable notification, correct any defects, by
repair or replacement, of any parts or components of this product that are determined by Jefferson to be faulty
or defective.
This warranty is void if the equipment has been subjected to improper installation, storage, alteration, abnormal
operations, improper care, unauthorised service or repair.
Warranty Period
Jefferson will assume both the parts and labour expense of correcting defects during the stated warranty
periods below.
All warranty periods start from the date of purchase from an authorised Jefferson dealer. If proof of purchase is
unavailable from the end user, then the date of purchase will be deemed to be 3 months after the initial sale to
the distributor.
1 Year:
All Jefferson Portable Transformers, Continuous Rated (Heater) Transformers, and Site Transformers
90 Days:
• All replacement parts purchased outside of the warranty period
Important:
All parts used in the repair or replacement of warranty covered equipment will be subject to a
minimum of 90 days cover or the remaining duration of the warranty period from the original date of purchase.
Warranty Registration / Activation
You can register and activate your warranty by visiting the Jefferson Tools website using the following address:
www.jeffersontools.com/warranty and completing the online form.
Online warranty registration is recommended as it eliminates the need to provide proof of purchase should a
warranty claim be necessary.
Warranty Repair
Should Jefferson confirm the existence of any defect covered by this warranty the defect will be corrected by
repair or replacement at an authorized Jefferson dealer or repair centre.
Packaging & Freight Costs
The customer is responsible for the packaging of the equipment and making it ready for collection. Jefferson will
arrange collection and transportation of any equipment returned under warranty.
Important:
All equipment returned under warranty must be accompanied by a proof of purchase
Upon inspection of the equipment, if no defect can be found or the equipment is not covered under the terms of
the Jefferson warranty, the customer will be liable for any labour and return transportation costs incurred.
These costs will be agreed with the customer before the machine is returned.
Warranty Limitations
Jefferson will not accept responsibility or liability for repairs made by unauthorised technicians or engineers.
Jefferson's liability under this warranty will not exceed the cost of correcting the defect of the Jefferson
products.
Jefferson will not be liable for incidental or consequential damages (such as loss of business or hire of substitute
equipment etc.) caused by the defect or the time involved to correct the defect. This written warranty is the only
express warranty provided by Jefferson with respect to its products.
