System-disconnection relay EU400 NA-protection
17
Subject to technical changes
8.4 Multiple PV with section switch and with a parallel-switched closing contacts as
feedback
(expanded inventory plant)
1)
Feedback contacts Y1/Y2 not connected set
8
rel .
8
→
8
trel.
8
→
8
oFF.
8
2)
N connected
→
only for programs with N
4)
Switch off the plant without recording an alarm, e.g. with output contact of a ripple control receiver
5)
Fuses only when line protection necessary, e.g. 3x16A
6)
Contact closed an
8
uSr .
8
→
8
StbY.
8
(default setting) = Standby, K1+2 switched-off
(e.g. by ripple control receiver or clock,
…)
Contact closed and
8
uSr .
8
→
8
on.
8
= repressed vector shifts
(e.g. when switching on …),
contact closed and
8
uSr .
8
→
8
y1y2.
8
= no evaluation of the feedback contacts
(e.g. for synchronisation, …)
7)
1 phase Application connect L1-L2-L3, 2 phase Application L1 / L2+L3 (only Pr 5, 7, 10, 13, 20)
8)
Additional switch-off of self generating plant.
Single-fault safety: shutdown of the self generation plant e.g. by ripple control input 0% with K2. Use
coupling relays ford contact multiplication of if safe isolation is required.
This second shutdown path must be tested separately during commissioning.
(
8
tst2
8
)
9)
Power supply / buffering. Switches have to withstand undervoltage for min.3 s (FRT)
Correct wiring of the 2x2 section switch:
With correct wiring monitoring of feedback
contacts MUST NOT RESPOND, when one of
the switches is switched off manually.
