Page 137 - TBIS_15194-2019_(EN)_3nd
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TBIS 15194:2019
C.4 Methods of testing EPAC immunity to electromagnetic radiation
C.4.1 General
These tests are designed to demonstrate the insensitivity of the EPAC to any factor
which may alter the quality of its direct control. The EPAC shall be exposed to the
electromagnetic fields, described in this Annex, and shall be monitored during the
tests.
C.4.2 Expression of results
The field strengths shall be expressed in Volts/m for all the tests described in this
annex.
C.4.3 Test conditions
The test equipment shall be capable of generating the field strengths in the range of
frequencies defined in this Annex, and shall meet the (national) legal requirements
regarding electromagnetic signal. The control and monitoring equipment shall not
be susceptible to radiation fields whereby the tests could be invalidated.
C.4.4 State of the EPAC during the tests
C.4.4.1 The mass of the EPAC shall be equal to the mass in running order if required
for performing the test.
a) The engine shall turn the driving wheels at a constant speed predetermined by
the testing authority in agreement with the EPAC manufacturer.
b) All EPAC systems including light (if applicable) shall be operating normally.
c) There shall be no electrical connection between the EPAC and the test surface
and no connections between the EPAC and the equipment, save where so
required by C.4.4.1 a) or C.4.4.2.
d) The test shall be done in at least the following conditions:
1) standstill mode (all EPAC systems including light activated, EPAC ready to be
started, but no assistance is given by the motor);
2) EPAC operating at 90 % -100 % of the maximum speed of the design “start-up
assistance mode” maximum speed
3) EPAC operating (with motor assistance) at 90 % of the design maximum
assistance speed.
Contact between the wheels and the test surface is not regarded as an electrical
connection.
Where ESA's are involved in the direct control of the EPAC and where these systems do not
operate under the conditions described in C.4.4.1 a), the testing authority is allowed to
carry out separate tests on the systems in question under conditions agreed with the EPAC
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