BE1-851E
3
APPLICATIONS
The BE1-851E Enhanced Overcurrent Protection System provides three phase, ground, and negative sequence
overcurrent protection and is intended for use in any non-directional overcurrent protection application. Its unique
capabilities make it ideally suited for applications with the following requirements:
• Applications that require low burden to extend the linear range of CTs.
• Applications that require the flexibility provided by wide setting ranges, multiple setting groups, and multiple
coordination curves in one unit.
• Applications that require the economy and space savings provided by a multifunction, multiphase unit. This one
unit can provide all of the protection, as well as local and remote indication, metering, and control functions
required on a typical circuit.
• Applications that require communication capability.
• Applications that require specific current response characteristics.
- The fundamental digital signal processing (DSP) algorithm provides rejection of harmonics and low transient
overreach.
- The RMS DSP algorithm provides true wide band RMS measurement.
- The average DSP algorithm provides a flat response characteristic over a wide frequency range.
• Applications where bus protection is provided by a high speed bus overcurrent blocking scheme instead of a
dedicated bus differential circuit.
• Applications where the capabilities of intelligent electronic devices (IEDs) are used to decrease relay and
breaker maintenance costs.
• Applications where additional control outputs are required beyond what is provided with the BE1-851.
FEATURES, continued
Figure 1 - Advanced HMI (Human Machine Interface)
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