This test testing the RCD for inconvenience nuisance tripping.
If the RCD fails any the above tests should changed for new one. 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. The test must simulate appropriate fault con-
dition and independent any test facility incorporated the device.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 41.2.
The testing ring circuit protected general-purpose RCD EN
61008 split-board consumer unit carried out follows:
1.
4.
.
5.e.
3.13)
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. Finally, the effective operation the test button incorporated within
the RCD should tested prove the integrity the mechanical
elements the tripping device.2 and 41. Press the test button the RCD should trip and disconnect the sup-
ply within 200ms.
When carrying out the test, all loads normally supplied through the device
are disconnected.
in Chapter 12.
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.
2. Set the test instrument the tripping current the device and a
phase angle 0°.1, residual current 150mA
should cause the circuit breaker open within 40ms.
6. the socket the furthest point from the source supply). The RCD should not trip within 2s. The RCD should again trip within 200ms.
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).3 the IEE Regulations, see also Table 12. 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. This test should repeated every 3
months. Change the phase angle from 180° and press the test button
once again.
8 Additional Protection: testing RCD: Supply connected
(612
