9252000897 Rev A
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
Содержание BE1-50/51B-233
Страница 1: ...INSTRUCTION MANUAL FOR OVERCURRENT RELAY BE1 50 51B 233 Publication 9252000897 Revision A 03 08...
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Страница 22: ...2 2 BE1 50 51B 233 Controls and Indicators 9252000897 Rev A P0053 50 SW3 Figure 2 2 Location of SW3...
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