Basler BE1-87G Specifiche Scaricare il pdf (Pagina 14)

BE1-87G - Functional Description 3-1

SECTION 3 • FUNCTIONAL DESCRIPTION

GENERAL

BE1-87G Variable Percentage Differential Relays are static devices that protect motors and generators by

providing an output signal when incoming current does not match outgoing current by a predetermined but

variable limit. The functional block diagram in Figure 3-1 illustrates the overall operation of the BE1-87G

Variable Percentage Differential Relay. Note that it may be configured to monitor either single-phase or three-

phase. Phases B and C, when present, are functionally identical to Phase A.

Figure 3-1. Functional Block Diagram

FUNCTIONAL DESCRIPTION

The following paragraphs describe the Relay circuit functions illustrated in Figure 3-1.

Current Transformers

Two standard system CTs with secondary windings to match sensing input range one or range two (five ampere

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Basler BE1-87G Specifiche Pagina 14