Basler BE1-50/51B-229, Instruction Manual

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9252000892 Rev A BE1-50/51B-229 General Information 1-5
Figure 1-2. Instantaneous Characteristic Curves
An additional, fixed delay of 0.1 second may be added with internal switch SW3-2. This delay applies to
both phase and ground applications. Closing switch SW3-2 provides an additional delay of 0.1 second.
For the location of SW3, refer to Section 2,
Controls and Indicators .
The instantaneous (50) element in the BE1-50/51B-229 relay may be set lower than the instantaneous
element in SFC relays and still have the same reach. This is because the BE1-50/51B-229 instantaneous
element effectively eliminates the fault current transient overreach components. When calculating BE1-
50/51B-229 instantaneous element settings, calculate the symmetrical value without any adder for
transient overreach.
Instantaneous Reset
The relay resets within 16 milliseconds when the sensed current decreases below the pickup setting.
Burden
Burden is nonlinear and is illustrated in Figure 1-3.
At 0.5 Aac: 4.8
Ω
At 5.0 Aac: 0.2
Ω