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IL01906001E
Instructional Literature
Page
4
Effective: May 2005
Arcflash Reduction Maintenance Switch
Application and Installation
Figure 2. Time Current Graph Showing Circuit Breaker Settings Before and After the Arcflash Reduction Maintenance Switch
Installation.
After
Before
0.5
1
10
100
1K
10K
0.01
0.10
1
10
100
1000
CURRENT IN AMPERES
Arcflash Reduction Ref. Voltage: 480 Current Scale x10^2
TIM
E
IN
SEC
ON
D
S
Manufacturer *CUTLER-HAMMER
Description Digitrip RMS 510-910
Frame/Model 1600 A
Sensor/Trip 1600.0 A
Plug 1600.0 A
Settings
Phase
LDPU 1 (1600A)
LDT 7
SDPU 6 (9600A)
SDT 0.2(I^2 T Out)
Manufacturer *CUTLER-HAMMER
Description Digitrip RMS 510-910
Frame/Model 1600 A
Sensor/Trip 1600.0 A
Plug 1600.0 A
Settings
Phase
LDPU 1 (1600A)
LDT 7
SDPU 6 (9600A)
SDT 0.2(I^2 T Out)
MAINT BYPASS 7.6 (12160A)
Manufacturer *Eaton Cutler-Hammer
Description Digitrip RMS 510-910
Frame/Model 1600 A
Sensor/Trip 1600.0 A
Plug 1600.0 A
Settings
Phase
LDPU 1 (1600A)
LDT 7
SDPU 6 (9600A)
SDT 0.2(I^2 T Out)
Manufacturer *Eaton Cutler-Hammer
Description Digitrip RMS 510-910
Frame/Model 1600 A
Sensor/Trip 1600.0 A
Plug 1600.0 A
Settings
Phase
LDPU 1 (1600A)
LDT 7
SDPU 6 (9600A)
SDT 0.2(I^2 T Out)
Arcflash Reduction Maintenance
Switch 7.6 (12160A)
Total Running Load + Transient Load = 5.92 kA
ARCING
FAULT
CURRENT
85% LEVEL
= 16.98 kA
Arcing
Fault
Current
85% Level
= 16.98 kA
Maintenance Switch
Retrofit