Finally, the effective operation the test button incorporated within
the RCD should tested prove the integrity the mechanical
elements the tripping device.13)
The object the test verify the effectiveness the RCD, that oper-
ating with the correct sensitivity and proving the integrity the electrical
and mechanical elements.
3. Using the standard lead supplied with the test instrument, disconnect
all other loads and plug the test lead the socket the centre of
the ring (i. The RCD should not trip within 2s. The RCD should again trip within 200ms.
Where the RCD has rated tripping current not exceeding 30mA and
has been installed reduce the risk associated with ‘basic’ and ‘fault’
protection indicated Regulation 411.
If the RCD fails any the above tests should changed for new one.e.
2.
in Chapter 12.Electrical installations and wiring systems
359
Purpose-built testers give readout ohms and satisfactory result is
obtained when the loop impedance does not exceed the appropriate val-
ues given Tables 41.
This test testing the RCD for inconvenience nuisance tripping.
The testing ring circuit protected general-purpose RCD EN
61008 split-board consumer unit carried out follows:
1.2.
4.
When carrying out the test, all loads normally supplied through the device
are disconnected. Change the phase angle from 180° and press the test button
once again.
5. This test should repeated every 3
months.3 the IEE Regulations, see also Table 12. the socket the furthest point from the source supply).
8 Additional Protection: testing RCD: Supply connected
(612. Press the test button the RCD should trip and disconnect the sup-
ply within 200ms. Now set the test instrument 50% the rated tripping current of
the RCD and press the test button. Record the
highest value these two results schedule test results such
as that given Appendix the IEE Regulations.1, residual current 150mA
should cause the circuit breaker open within 40ms. The test must simulate appropriate fault con-
dition and independent any test facility incorporated the device. Set the test instrument the tripping current the device and a
phase angle 0°.
6.
Certification and reporting
Following the inspection and testing installation, certificate should
be given the electrical contractor responsible person the person
ordering the work (Chapters and the IEE Regulations).
.2 and 41
