doble TDR9000 - Figure A.76 Live Tank;Ehv - Parameters

Test Plan Items
A-64 72A-1898 Rev. A 11/01
Monday, November 26, 2001 1:09 pm
Live Tank/EHV
Figure A.76 shows the Live Tank/EHV parameters available for a circuit
breaker.
Figure A.76 Live Tank/EHV – Parameters
Main Contact
Configuration –
EHV/SPLIT
Contact Channel
Activation
The EHV screen activates the EHV contact channels for circuit breaker
contact monitoring. A selection can be made between EHV and SPLIT
contact configuration. EHV channels are activated by pairs.
N
OTE
The SPLIT screen allows singular channel activation. This is used when
testing a Live Tank Circuit Breaker with an odd number of breaks per
phase.
EHV Resistor
Ranges
Trip/Close For circuit breakers with insertion resistors, set a
resistor value range in the Test Plan for the program
to pick up the resistor level, for the time during
which the resistor is in the circuit during circuit
breaker operation, and for correct wipe
measurement.
If there is no resistor in parallel with the contact,
set the resistor range to NONE. If the value of the
resistor overlaps both ranges, either can be
selected.
N
OTE
An incorrect Resistor range setting can result in an incorrect Wipe
calculation. The Average Velocity values can also be incorrect if
Contact Open or Contact Close was used to specify the velocity
measurement zone.