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BE1-50/51B-233 General Information
1-5
both SW3-1 and SW3-2 provides an additional delay of 0.3 second. Section 2 illustrates the location of
SW3.
The instantaneous element in BE1-50/51B-233 relays may be set lower than the instantaneous element
in ABB relays and still have the same reach. This is because the BE1-50/51B-233 instantaneous element
effectively eliminates the fault current transient overreach components. When calculating BE1-50/51B-
233 relay instantaneous element settings, calculate the symmetrical value without any adder for transient
overreach.
P0048-10
Figure 1-2. Instantaneous Characteristic Curves
Burden
Burden is non-linear. Figure 1-3 illustrates the device burden.
At 0.5 amperes:
4.8
Ω
At 5.0 amperes:
0.2
Ω
Summary of Contents for BE1-50/51B-233
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