Eaton EFX48 e-Fuse Series, Installation And Operation Manual

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EFX48 e-Fuse System Operation
Copyright © 2019 Eaton Corporation. All Rights Reserved.
IPN March 2019
117
Breaker Curve Specification
The breaker curve specification applies to both load outputs and battery string connections. For
battery string connections the breaker curve operates for both charge and discharge currents.
For load outputs the breaker curve only operates in the positive direction (i.e. on currents
flowing out of the EFX48 and into a load).

• Other sources of power (additional batteries etc.) should not be connected to
a load output as the output (if turned on) would not be protected against any
reverse current flowing.
• The battery strings must not be paralleled at the terminal blocks. i.e. do not
connect one battery string to both sets of terminals simultaneously. This is
not a supported mode of operation and may have unpredictable results.
•
The load outputs must not be paralleled at the terminal blocks. I.e. do not
connect one large load to multiple sets of terminals simultaneously to
increase the load rating. This is not a supported mode of operation and may
have unpredictable results.
Fig. 1 Breaker Curve for Load outputs and String Connections
Notes:
1. Load outputs follow the breaker curve based on a multiple of their rating and in
addition have a hardware <100usec trip set at 250A +/-50A for all set ratings
2. String connections follow the curve based on a multiple of their set rating and in
addition have a hardware <100usec trip set at 550A +/-50A for all set ratings