9190700990 Rev F
BE1-67N Functional Description
3-1
SECTION 3
•
FUNCTIONAL DESCRIPTION
INTRODUCTION
BE1-67N circuit functions are illustrated in the function block diagram of Figure 3-1 and described in the
following paragraphs.
Figure 3-1. Function Block Diagram
CURRENT SENSING
Internal current sensing transformers receive inputs from the 5 Aac (sensing input range 1 or 2) or 1 Aac
(sensing input range 3 or 4) nominal secondary of standard transformers. Input transformers for the
sensed measured current (I
op
) are tapped so that the relay range is determined by its external
connections. External connections are listed in Table 3-1.
Table 3-1. I
op
Current Sensing Input Connections
Range Terminals
High
0.225 to 1.20 Aac
7 and 8
1 Aac
Nominal
Low
0.075 to 0.40 Aac
7 and 9
High
1.125 to 6.0 Aac
7 and 8
5 Aac
Nominal
Low
0.375 to 2.0 Aac
7 and 9
Summary of Contents for BE1-67N
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