O P E R A T O R M A N U A L
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Note: If an output cable reel is being used, connect the high voltage MC connector to the
center plug on the reel. The MC connector requires the operator to push IN before pulling
OUT to disconnect. Connect the return ring terminal to the brass return stud on the reel.
Make all load test connections to the cable from the reel leads as noted in steps 7 and 8.
9.
Connect the input power cord to a grounded power source (see specifications for input voltage
and frequency). If the distance to a power source is greater than the cord provided, a grounded
extension cord of sufficient ampacity will work..
10.
Operate the MAIN POWER circuit breaker to energize the control circuits. (Check emergency
stop button is out and for External Interlock plug or switch if applicable.)
11.
Voltage must be applied according to specifications from the cable manufacturer or any other
applicable test standards.
12.
Choose the appropriate OUTPUT TAP voltage (9/18/36 kVdc, 5/10/20 kVdc) for the cable fault being
tested. When changing tap positions the switch must be in position to energize high voltage, allow 20
seconds for the motorized switch to achieve final position.
13. Place
the
OPERATING MODE switch in the CAP DISCHARGE position.
14.
Make sure the DISCHARGE MODE switch is in the center position.
15.
Set up the TDR in accordance with manufacturer’s instructions. At this time you should see a
low voltage trace on the screen and the TDR should be “armed”.
16.
With the OUTPUT ADJUST at zero (zero start interlock engaged), depress the START
pushbutton. The START light will glow.
17.
Increase the output by rotating the OUTPUT ADJUST slowly clockwise until the desired
Capacitor Discharge (Thumping) voltage is reached. The OUTPUT ADJUST percentage markings will
provide a good guide to the level the output will reach.
18.
Push the DISCHARGE MODE switch upward to the single pulse position. The CDS will
discharge one pulse. If the cable fault broke over, you should see a deflection on the TDR screen. If not,
you may need to repeat this step at a higher voltage.
19.
Once you have pre-located the fault with the TDR, put the coupler switch in DIRECT MODE and
the discharge mode switch to the CONTINUOUS position. The cable fault will break over ('Thump') at
the fault location and acoustical devices can be used to pinpoint the resulting sound. Refer to pages 13-
15 for further instruction on thumping in direct mode.
20.
Upon locating the failure point, depress the STOP pushbutton to interrupt the test cycling.