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6F2T0207 (0.01)
V r
V i
(b) Incoming voltage (V i )
Vr − Vi
Zero point (Δθ=0)
Advance time
(c) Beat wave provided by V r + V i
Δθ
Start to close CB
End of closing CB
Time
T
α
β
CB
Setting
CB closing command
Tolerance for synchronism
CB contact
Zero point (Δθ=0)
CB closed point
CB closing command issued
(d) Advance time and CB closing command
Figure 4.5-6 Advance time to close CB for an asynchronous system
GRE200 (5,6)
- 603 -
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