Vanguard CT-6500 - Manual (Page 18)

CT-6500 Operating Instructions
11
8.0 Test Hook-up Connections
8.1 Contact Cable Hookup
A typical, contact cable connection to a circuit breaker is shown in Figure 2.0. Red clips are
connected to phase A, B and C of the breaker’s bushings. The black clips are connected on the
grounded or common, side of the bushings. For circuit breakers with series contacts, connect the
contact cables as shown in Figure 3.0.
NOTE
It is advisable to ground one side of the contacts for most testing purposes. If a breaker
is floating or ungrounded, ensure that the contact channel inputs are protected against
static discharge.
Figure 2.0 Contact Cable Connection