Basler Electric BE1-700 - Manual (Page 183)

SECTION 8
• APPLICATION
INTRODUCTION
This section discusses the application of the BE1-700 Digital Protective Relay. The product can be
purchased as a current only relay (BE1-700C) or as a voltage only (BE1-700V) relay. Each product has
two embedded preprogrammed logic schemes plus NONE that maximizes the feature set of the individual
product.
Each preprogrammed logic scheme is designed to take full advantage of the specific BE1-700 protection
capabilities. However, not all elements have to be set. The protection engineer can choose which
elements receive operational settings or adapt the scheme to user specific needs by changing the
protection and control elements and settings. In many cases, this eliminates the need to create a custom
logic scheme from scratch.
Please note that this preprogrammed logic scheme also illustrates typical ways of using or controlling
various functions. The user may choose to create a custom logic scheme by mixing preprogrammed logic
with user defined logic. The logic also can be modified to incorporate some of the features described in
the Application Tips, provided at the end of this section. The flexibility of BESTlogic in combination with
easy to use BESTCOMS
™ allows the engineer to quickly create a protection and control scheme that
meets the exact requirements of the application. The following sections discuss the application specifics
of the BE1-700C preprogrammed logic scheme.
EXPLANATION OF TERMS
The following paragraphs define terms that are used in the logic scheme discussions of this section.
Function Block. A stand-alone protection or control function that is equivalent to its discrete component
counterpart.
Torque Control. Blocks the start of a voltage or frequency function block. The pickup and trip outputs are
held at zero and the timing function is inhibited. This is in contrast to merely blocking the trip output.
Torque control applies to all voltage and frequency function blocks.
Virtual Switches. Logic switches that emulate traditional switches used on relay and control panels.
Examples of these switches are breaker control switches (101) and selector switches (43). Virtual
switches can be operated via communication commands or the front panel human-machine interface
(HMI). Operation of a virtual switch can be disabled if the switch won’t be used in a preprogrammed logic
scheme that includes the switch. Password protection is also available for the virtual switches.
Radial System. A system where the loads are fed from only one source at a time.
Network System. A system where loads can be fed by more than one source at the same time.
OVERVIEW OF PREPROGRAMMED LOGIC SCHEMES
Four preprogrammed logic schemes and NONE are available for the BE1-700 family of products. Each
logic scheme is specific to the feature set (options) ordered by the customer and becomes the default
logic. The same schemes are available through BESTCOMS for the BE1-700 series of products. See
Section 14, BESTCOMS Software, for the Windows
® based user interface software. More detailed
information about these schemes is provided in Details of Preprogrammed Logic Schemes.
CAUTION
If ANONE@ logic is selected, the protection elements are not connected to the
virtual outputs or output relays, and fault recording features including targets are
not enabled. The user will have to program and enable these features and
functions as part of building a custom logic scheme.
9376700990 Rev M BE1-700 Application 8-1