User's Manual

AT7400 Owner Manual Rev. 2.0 – October 2006-10-23 ANNEX A Section 7 - 5/9

Parts list for the module 4443 is as follows:

 Secondary breaker.

 Timer, 2.5 seconds.

 Mechanical delay 2 seconds.

 Two 18Ω/50W resistors in parallel.

 On ON/OFF switch with 2 independent contacts.

No matter which version is choose, 208/220/240 Vac will always be voltage to be delivered for the exciter

drawer, and power amplifier drawers.

Fig. 7.6: On the right the drawer AC power connector, on the right AC mains reading on the center pins of the same

connector.

7.2.3. Energy Distribution and Control - Operational Short Description

When ON the 30A breaker connects the 2 main phases to the main bi-phase breaker terminal. The main

breaker will be switching ON, module 4443, only if:

(a) The phase detector, PCB CIM6241A sends the command signal confirming the presence of the all phases.

3 in sequence relay close-open-close noise is audible.

(b) The interlock is closed,