Our number one priority is keeping people safe, which we’ve been doing for more than three decades as a global leader in the manufacture of electrical safety test equipment.
Our hipot testers give manufacturers confidence in the quality and safety of their products that they can pass on to their customers. Plus, they all come with on-board storage to support and improve testing and reporting processes.
Tested, Trusted… Worldwide.
Who are Seaward?
We’re based in Tampa, Florida, and County Durham, UK.
We are proud of our reputation for innovation; we want people to be safe and to do that we continue to innovate and invest in our people.
We work with manufacturers, like yourself, to understand the production process, what’s important, and how we can fulfil your needs.
We even provide free training and live product demos to help you do your job well.
We have a fully equipped service center because we understand the importance of good aftercare.
Who else is using Seaward hipot testers?
Some of the biggest names in the industry already trust our products to check the safety of theirs.
We have a number of accessories available for our HAL Series of hipot testers which increase your production line productivity and test area safety.
Desk Test n Tag Printer
CCD Barcode Scanner
Y300 Fault Simulator
Safety e-Base Reporting Software
Which HAL is best for me?
Here’s a handy comparison table to help you chose your HAL perfect match.
Swipe to see full table
Ground Bond Test
AC Hipot Test
DC Hipot Test
DC Insulation Resistance Test
Load Power Test
Load Power (200mVA resolution) Test
Barcode scanner/printer Option
How can HAL help you?
“Being able to store and recall test sequences, with password protection, gives me peace of mind. I know that the test procedure is always completed fully and every single product is tested to our exact standard again and again.”
“We use our Seaward HAL hipot tester with the Desk Test n Tag Printer. It makes it a lot easier to check if the units have been tested before we package them for shipping. No tag, no test!”
“Since we added a HAL LED to our production line, the number of ‘out of the box’ non-functioning returns have dropped. It’s become an effortless part of our production line safety test and has really saved the company money on warranty replacements.”
Customer Experience Manager
Looking for the HAL Series Datasheet? Complete the form on this page to download.
Hipot testing, in conjunction with earth bond testing (where applicable) form the core tests for electrical safety testing on a production line.
The hipot test, derived from the term High Potential Test, is a direct application of a high voltage to a unit under test. The test voltage is usually much higher than the usual operating voltage in order to stress the dielectric properties of the device under test.
The test is designed to detect that gaps or clearances between conductive parts and earth (or the product chassis) are sufficient and that degradation, such as pin holes, cracks in insulation and other protection devices have not resulted through production processes and or wear and tear, for example, a live conductor has not accidentally been crushed between the mating parts of the chassis, causing it to become live when switched on.
Breakdown in the insulation will result in current flowing across the test points of the Hipot tester, this current flow is commonly known as leakage. If this leakage current is too high the item under test is deemed to be unsafe and the test will fail.
Why carry out Hipot Testing?
The test is designed to ensure the safety of the product. In particular, legislation such as the LVD and issues of product liability, increase the need for manufacturers to illustrate due diligence.
Legislation such as the LVD, Machinery and Medical Directives demand that 100% of manufactured products are subjected to this test. In addition a number of independent and government product approvals agencies require that this test is performed, and that records are kept for each product design, and for each product manufactured. These organisations include:
Underwriters Laboratories (UL)
Canadian Standards Association (CSA)
International Electrotechnical Commission (IEC)
British Standards Institute (BSI)
German Electrical Engineers Association (VDE)
Technische Uberwachungs Verein (TUV)
Japanese Standards Institute (JIS)
How do we carry out a Hipot Test?
All Hipot Testers on the market will have a High Voltage terminal and a Return Terminal. The test is performed by applying a voltage, usually greater than 1000V to the line conductors of the item under test (usually Live and Neutral).
The High Voltage terminal connected to the line conductors and the Return Terminal, usually connected to the Chassis of the product, or the Earth Conductor. The test voltage is applied and the current flowing across the conductors is measured, providing this level of current is low enough not to pose a hazard, the test will complete and the item under test will be deemed safe.
To save time it is normal that the live and neutral conductors are strapped together during this test, rather than testing each one individually against the ground.