Hitachi Relion 650 Series Technical Manual page 301

1MRK 511 557-UEN Rev. A
IEC19000918 V1 EN-US
Figure 137: Re-ignition on an inductive load
Re-ignitions or re-strikes may damage the interrupter. Hence, detecting these events is useful for
adapting the controlled switching operation, so as to minimize deterioration of the interrupter. The
detection algorithm is described in
Close operation mechanical monitoring
As per the physical design of the breaker, every closing operation is associated with a changeover
pattern of the 52a (NO) and 52b (NC) auxiliary contacts, as shown in
changeover of the auxiliary contacts always occurs on the same point of the travel curve, this allows
a simple monitoring of the mechanical closing operations of the CB.
Technical Manual
Voltage
Current
Section
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Re‐ignition
Dielectric strength across
breaker
TRV
12.18.7.11.3.
Section 12
Monitoring
time
TRV
time
IEC19000918-1-en.vsdx
GUID-86970AF7-4263-4F5D-A677-0290DB4AE03E v2
Figure 138. Assuming that
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