Atek 10002iX, Руководство пользователя, Страница: 208 / 259

User Manual California Instruments
9.4.6.4EOS3 70/80 Tap setting change
Second generation EOS3 units are equipped with both a 70% and an 80% output tap. The
default EOS3 configuration shipped from the factor is set to the 70% tap. This is the most
commonly used dip level for product standards. However, Edition 2.0 of the IEC 61000-4-11 test
standard does allow for a 80% dip level for which the alternate tap setting may be used. If testing
for 80% dips is required, the EOS3 must be reconfigured. This can only be done by removing the
top cover and changing the connections on the three transformer taps inside the EOS3, one for
each phage. As such, this configuration change should be avoided as much as possible. Should
a configuration change be required, follow the procedure outlined below.
1. Remove all input power from the EOS3 first. Make sure the NSG 1007-15S-208 is turned
off. Then disconnect the output of the NSG 1007-15-208 power source from the EOS input.
2. With the EOS3 completely disconnected, remove the top cover by removing the Phillips
screws of the top cover.
3. Each transformer – one per phase – has five output tap lugs connected to a wire harness.
The wire harness routes the output of each tap the electronic switches on the control board.
There is one control board for each phase mounted to a heat sink.
4. The output tap lugs are numbered 1, 2, 3, 5, 4 in that order on the transformer. The 70%
output tap is available on lug number 3. The 80% output tap is available on lug number 5. To
change taps, some hand tools (wrench, pliers) will be required.
•
To switch from 70% to 80% tap, disconnect the wire from lug 3 and reconnect it to lug 5
on each of the three transformers.
•
To switch from 80% to 70% tap, disconnect the wire from lug 5 and reconnect it to lug 3
on each of the three transformers.
5. Replace the top cover.
Although it is possible to wire each phase for a different tap level, this is not recommended. It
may be advisable to mark the unit to reflect the configured tap after making a configuration
change.
208 i Series II / NSG 1007 II / iM Series II