RCD’s are extremely an integral part of your electrical system. Without them working correctly any faulty appliance could possibly electrocute you.
It is important that you utilise the test button on the RCD regularly yourself but that test button only confirms that at some stage of an electrical grounding it will cut the power. What it doesn’t test is the trip time which is vital for your safety if there is an electrical earth through someone from an appliance. Our tester measures the trip times for both 0-degrees and 180-degrees and confirms that it will trip within the 30 milliseconds allowed by Australian Standards 3760.