MA-041
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DGA 900 Plus - Installation & Commissioning Manual - Rev 1.1
4-Mar-22
Page 49 of 99
Figure 9-15: Star configuration (Y-Connection)
Similarly, in Figure 9-16, the HFCT can be installed after the switch. However, it should be
understood if for any reason the switch is opened, the path to ground will be interrupted
and the HFCT will have absolutely no positive affect, resulting in PD diagnostic
capabilities being disabled.
Figure 9-16: HFCT installed after the switch on cable from the Neutral Bushing to ground
The HFCT (if to be fitted) is specific to the transformer connection point (as provided in
the pre-installation information). Fit the HFCT clamp to the neutral ground connection.
An example is shown in Figure 9-17.
Note: The Neutral CT arrow must point towards
earth.
