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Overview of the Magnum PXR low voltage circuit breaker
MAGNUM PXR PRODUCT GUIDE
PA013006EN September 2022 www.eaton.com
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Breaker internal and rear view features
Magnum circuit breakers are designed for ease of access
for inspection, modification and maintenance at the point
of use. The breaker front cover is easily removed with
four captive bolts, revealing the modular internal breaker
features.
1. Secondary terminal points for internal standardized
breaker wiring connections
2. Breaker accessory mounting deck with three posi-
tions for mounting:
•
Shunt Trip device (ST)
•
Spring Release device (SR)
•
Undervoltage Release device (UVR) or second ST
3. PXR Trip Unit
4. Spring charging motor (optional) for electrically
charging the stored energy springs
5. Manual spring charging handle for manually charg-
ing the stored energy springs
6. Padlockable levering device shutter for drawout
breakers
7. Color-coded position indicator for drawout
breakers:
•
CONNECT (Red)
•
TEST (Yellow)
•
DISCONNECT (Green)
8. Secondary contact block for connection to external
cell control wiring
9. Removable arc chute covers for easy access to
breaker main contacts
10. Primary finger cluster disconnecting contacts for
drawout breaker are mounted on the breaker
element for ease of access for inspection and
maintenance
ote:
N
Some competitors mount the primary finger
clusters inside the cell, requiring shutdown of the
switchgear for inspection and maintenance.
11. Rigid frame housing (thermoset composite resin)
providing increased strength and durability
Figure 9. Magnum PXR internal features
Figure 10. Magnum PXR rear view
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