New effective earth continuity testing
A
Seaward Electronic product story
Edited by the Engineeringtalk editorial team
Mar 19, 2007
Seaward Electronic has developed a new method of carrying out earth continuity testing when undertaken as part of the electrical safety testing of portable appliances.
The new test technology recognises that a 200mA test current is rapidly becoming the European standard for in-service testing and testing after repair.
Seaward's new test technology uses a dual current high intensity test to overcome contact resistance problems or other situations where weak conductor connections may inhibit protective earth testing with conventional 200mA currents.
The Seaward 200mA test has been specially designed to help overcome variations in measurement that can be caused by contact resistance between the test probe and the appliance under test, for example, when measuring continuity of tarnished or corroded parts such as a kettle element.
The new Seaward test achieves this by applying a short duration high current pulse to 'pre-condition' the equipment under test, which is then followed by a 200mA test current to make the appropriate measurements.
The unique dual pulse current technology introduced by Seaward enables valid earth continuity tests to be carried out using lightweight, portable, battery powered testers.
This enables important earth continuity testing to be carried out quickly, safely and effectively by field service and test engineers.
The new test capability is already included in the Seaward's PrimeTest 300 bluetooth-enabled PAT tester and will be incorporated across all instruments in the PrimeTest range of hand held portable appliance testers.
Comprehensive test instrument and data management software options are available through the PATSolutions range of integrated portable appliance testing product packages.
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Contact Seaward Electronic
Tel +44 191 586 3511
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Electrical installation test guide from Seaward
Seaward has published a free guide to the electrical testing requirements of the 17th Edition of the Wiring Regulations. -
Ensuring the safety of electrical installations
No health and safety manager responsible for maintaining the safety of electrical installations can ignore the requirements of the 17th Edition wiring regulations, explains Jim Wallace of Seaward.
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