Pulsar TCF-10B, System Manual, Page: 72 / 249

To test the 2-Frequency Directional Comparison Units (Only), complete the 11 steps depicted in Table
5-9 below.
Page 5–10 April 1997
TCF–10B System Manual
Technologies, Inc.
Rcvr Logic CLI/Disc Optional
LEDs. LEDs EM Outputs Solid State Outputs
Low
Cbk Cbk Trp Sig
Grd Trp Trp Noise LLev 1 2 3 4 5 6 Noise Trp Grd 2 Cont
1) Check initial LED, output, and contact states:
OFF OFF OFF ON ON ( open ) + V* 0 V 0 V 0 V 0 V OP
2) Set input frequency to 250.500 kHz (EWB), or 250.250 kHz (WBWS), or 250.100 kHz (NB or
WBNS); or required fre 500 Hz (EWB), or required fre 250 Hz (WBWS), or
required fre 100 Hz (NB or WBNS). Observe states as follows:
ON OFF OFF OFF OFF CL CL CL OP OP OP 0 V + V* 0 V + V* 0 V OP
3) Set input frequency to 250.000 kHz. Then set input frequency to 249.500 kHz (EWB), or 249.750
kHz (WBWS), or 249.900 kHz (NB or WBNS); or required frequency -500 Hz (EWB), or required
frequency -250 Hz (WBWS) or required frequency -100 Hz (NB or WBNS). Observe states as
follows:
OFF OFF ON OFF OFF ( open ) 0 V + V* + V* 0 V 0 V OP
4) Set input frequency to 250.500 kHz (EWB), or 250.250 kHz (WBWS), or 250.100 kHz (NB or
WBNS); or required fre500 Hz (EWB), or required fre250 Hz (WBWS), or
required fre100 Hz (NB or WBNS). Then
quickly shift input frequency to 249.500 kHz
(EWB), or 249.750 kHz (WBWS), or 249.900 (NB or WBNS); or required frequency -500 Hz
(EWB), or required frequency -250 Hz (WBWS), or required frequency -100 Hz (NB or WBNS).
Observe states as follows:
OFF ON ON OFF OFF OP OP OP CL CL CL 0 V + V* + V* 0 V + V* OP
Table 5–9. 2-Frequency Directional Comparison or Direct Transfer Trip Units (Only) Testing.
* + V (Nominal) outputs equals the voltage applied to the TB1-1, usually station battery.
Good
Channel
OFF
ON
ON
ON