Caution - Exercise care
during lifting to avoid
damage to the bushings.
Breaker has high center
of gravity.
3.3 Storage
For prolonged storage, indoor storage is recommended. If stored outdoors, the cabinet
heaters must be energized to maintain warranty. The mechanism and control compartment is
equipped with heaters to reduce condensation.
4.0 GENERAL DESCRIPTION
4.1 High-Voltage Assembly
The high-voltage section of the R-MAG consists of three individual phase assemblies
mounted on insulating standoffs. Each phase of the R-MAG consists of a single vacuum
interrupter, flexible shunt and operating rod.
4.2 Housing
The doors of the breaker housing are removable and are retained by four pins. The position
indicator is visible through the front door. The breaker nameplate showing rating information,
serial number, and shop order number are mounted on the right-hand side of the housing.
4.3 Phase Assembly
Figure 3 shows the details of the phase assembly. The back bus work is attached directly to
the fixed contact stud on the back end of the vacuum interrupter. The current transfer
assembly housing is fastened to the opposite end of the vacuum interrupter. In the current
transfer assembly, a contact block/flexible shunt transfers current from the moving contact of
the vacuum interrupter directly through the bus to the bushing.
Page 3
Figure 2. Lifting Detail
38-929M-15A 10/15/02 1:11 PM Page 7
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