TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 H-3
Monday, November 26, 2001 1:09 pm
EHV Module
Table H.2 lists the characteristics of the EHV module.
Table H.2 EHV Module
Characteristic Description
Main Contact Channels 6 channels with 2 breaks per phase
Contact Sense Voltage for
Main Contact Timing
15/7.5 VDC
(Modified by pre-insertion resistor value)
Contact Sense Voltage for
Resistor Switch Timing
15/7.5 VDC
(Modified by pre-insertion resistor value)
Close and Open Timing
Resolution
100 microseconds
Close and Open Timing
Accuracy
±
100 microseconds
Minimum Contact Bounce
Measurement
60 microseconds
Pre-Insertion Resistor
Value Range
10 - 300 Ohms or 200 - 500 Ohms
Resistor Value
Measurement Accuracy
±
10%
Capacitance Measurement
Range and Accuracy
75 to 10,000 pF in the range of
±
5%