doble TDR9000, User Manual, Page: 216 / 454

Transient Recovery Voltage
A-16 72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Transient Recovery Voltage
Figure A.16 shows the Transient Recovery Voltage scheme. (Reprinted
from Reference 2. Permission granted by Marcel Dekker, Inc.)
When the current through the circuit breaker is interrupted, the entire
system adjusts to its new operating state. The voltage transients produced
separately by the left subsystem, V
L
(t), and the right subsystem, V
R
(t),
stress the recently conducting arc plasma. The transient recovery voltage
(TRV) is defined as the difference between the voltage on the left and
right sides of the circuit breaker.
Figure A.16 Transient Recovery Voltage Scheme
When the basic interrupter of the circuit breaker does not meet the
interruption requirements, auxiliary devices, including an insertion
resistor, shunt capacitor or open-gap grading capacitor, are used to
modify the TRV.
Left
Subsystem
Right
Subsystem
Breaker
v
L
(t) v
R
(t)
TRV = vL (t)
- v
R
(t)
Definition of transient recovery voltage.
v
L
(t)
v(t)
TRV
v
R
(t)
TRV components.
TRV(t)
0 t
TRV components.