Figure 6-23.--Ringing generator, cover removed.

RINGING GENERATORS.-- The switchboard

panel in cabinet 2. Figure 6-23 is an illustration of a

has two ringing generators, which are mounted on a

ringing generator with the cover removed.

baseplate at the bottom of cabinet 2. The generators

are transistorized units, which supply ringing current

GROUND FAULT DETECTION PANEL.--

at 20 Hz, 75 to 110 volts to station telephones. The

The ground fault detection panel (fig. 6-24) detects

generators are wired so that one is active (on line) and

shorts and/or leakage paths from the ship's wiring to

the other is in a standby condition. Should the on-line

the ship's hull. This panel is located in the lower right

generator fail, manual transfer to the standby

comer of cabinet 2. Table 6-5 describes the controls

generator is required. The manual transfer switch

and indicators located on the ground fault detection

(RG1 20HZ/RG2) is located on the switch and fuse

panel.

Figure 6-23.--Ringing generator, cover removed.

6-26