Bird Technologies 4412A - Manual (Page 17)

7
Chapter 3 Operation
Connectors
The Series 4410 Wattmeter is normally supplied with two Female N type con-
nectors which are of the Bird Quick-Change “QC” design. Other “QC” connectors
are available as listed in the Replacement Parts List.
Inserting Elements
The plug-in element is inserted into the line section socket and rotated to either
stop. A small catch in the lower left hand corner of the casting face presses on
the shoulder of the plug-in element and keeps it in proper alignment,refer to fig-
ure 3. This assures a good contact with the DC pickup and between the lower
edge of the element and the seat of the line section body.
Figure 3 Element Lock
On diametrically opposite sides of the plug-in element body are the contacts
that provide DC pickup for either direction, refer to figure 4. These contacts
make connection with the spring finger of the line section only when the plug-in
element is in the precise forward or reverse position: i.e., against the stop.
Figure 4 Element
Lock
Unlock
Stop Pin
Contact