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PRODUCT DESCRIPTION
PRODUCT
PCS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS600000 E40
REV.
G
LANG.
en
PAGE
3.2.2.3. dv/dt filter module (VFM)
The VFM reduces the dv/dt on the transformer or generator winding created by switching
of the IGCTs and to attenuate high frequency oscillations between the IGCT power stack
and the transformer.
Figure 3–8 VFM
3.2.2.4. DC-link grounding isolator
The main function of the DC-Link grounding isolator is to ground and short-circuit the
converter DC-Link in case of service or maintenance work.
The DC-Link grounding isolator is blocked in open position at DC-Link voltages higher than
50 V. The handle can be locked with a padlock in closed position to prevent unauthorized
operation.
The 2CL converter has two DC-Link grounding isolators, one per conversion line.
The DC-Link ground isolator is a two position switch.
–
Open position:
DC-Link is not grounded
–
Closed position:
DC-Link is shorted and grounded
Figure 3–9 DC-link grounding isolator
1) Connection to transformer terminals
2) dv/dt filter module
1) DC-link
2) Grounding isolator
3) DC-link grounding isolator
4) Grounding isolator unlocked
=
~
L
FF
R
FF
C
FF
C
FFE
1
2
1
2
3
4