• Shots failed
• Final trips
• Shots cleared
• AR started
The counters are cumulative and they update automatically according to the operations of the auto-
recloser function. They can be found in the
Statistics tab at Control
→
Auto-recloser
→
Registers.
5.4.5 Synchrocheck (ΔV/Δa/Δf; 25)
Checking the synchronization is important to ensure the safe closing of the circuit breaker between two
systems. Closing the circuit breaker when the systems are not synchronized can cause several
problems such as current surges which damage the interconnecting elements. The synchrocheck
function has three stages: SYN1, SYN2 and SYN3. Their function and availability of these
stages depend on which voltage channels are set to "SS" mode or not. Voltage measurement settings
are located at
Measurements
→
Transformers
→
VT module.
When only U3 or U4 voltage measurement channel has been set to "SS" mode:
• SYN1 – Supervises the synchronization condition between the channel set to "SS" mode and
the selected system voltage (UL1, UL2, UL3, UL12, UL23 or UL31).
• SYN2 – Not active and not visible.
• SYN3 – Not active and not visible.
When both U3 and U4 have been set to "SS" mode:
• SYN1 – Supervises the synchronization condition between the U3 channel and the selected
system voltage (UL1, UL2, UL3, UL12, UL23 or UL31).
• SYN2 – Supervises the synchronization condition between the U4 channel and the selected
system voltage (UL1, UL2, UL3, UL12, UL23 or UL31).
• SYN3 – Supervises the synchronization condition between the channels U3 and U4.
The seven images below present three different example connections and four example applications of
the synchrocheck function.
Figure. 5.4.5 - 106. Example connection of the synchrocheck function (3LN+U4 mode, SYN1 in use, UL1 as reference voltage).
A
AQ
Q-S215
-S215
Instruction manual
Version: 2.04
166
Summary of Contents for AQ-S215
Page 1: ...AQ S215 Bay control IED Instruction manual...
Page 249: ...Figure 7 4 151 Example block scheme A AQ Q S215 S215 Instruction manual Version 2 04 248...
Page 269: ...Figure 8 13 172 Device installation A AQ Q S215 S215 Instruction manual Version 2 04 268...
Page 287: ...10 Ordering information A AQ Q S215 S215 Instruction manual Version 2 04 286...