AVTMTTR330 Rev 3 March 2010
9
3
PREPARING FOR TEST
Site Preparation
Choose a location that meets the following conditions:
The location is as dry as possible.
There is no flammable material stored in the vicinity.
The test area is adequately ventilated.
Be sure all equipment is de-energized and all terminals of the UUT are
accessible. Erect suitable safety barriers to protect the operator from traffic
hazards and to prevent intrusion by unauthorized personnel. User provided
Warning lights are recommended.
Verify that the Local station ground is intact and has impedance continuity to
earth.
Making Circuit Connections
Connections should be made in the order as listed below.
1.
Ground.
Use the Megger supplied Safety Ground Cable 15 ft (4.6 m) to
connect the TTR330 Wing Nut Ground Terminal directly to Local Station
Earth ground. Ensure the Transformer chassis also has impedance continuity
to Local Station Earth ground potential.
2.
Input Power Source Ground
. Input Power Source Ground Terminal
should be less than 100 milliohms of impedance to Local Station Earth
Ground.
3.
Connect the Input Power Cord
. Before making this connection, Ensure
the Input Power Source meets the requirements as listed in Section 2 and
Specifications Section 8. Also make sure that the ON/OFF switch (Figure 1-
1, No. 1) is in the OFF position. Connect the input power cable to the
TTR330 first, then to the power source. At this time, leave the ON/OFF
switch in the OFF position.
