Basler-electric BE1-CDS240 General Information User Manual

SECTION 1 • GENERAL INFORMATION TABLE OF CONTENTS SECTION 1 • GENERAL INFORMATION ...

Differential Protection Application Considerations The principle of current differential relaying is simple in concept. Measure the current flowing in

Problem 2: Measured Current Magnitude Mismatch General The currents measured by each set of current inputs can be transformed from their primary value

The tap adjustment factors can be used to eliminate the mismatch when the tap changer is at neutral. But, when the tap changer is off of neutral, diff

Figure 1-4. Delta/Wye Transformer Circuits BE1-CDS240 Solution The input currents must be combined to mimic the way they are combined in the protecte

Figure 1-5. Three-Phase Connections, Delta-Wye Configuration, CT Compensation There are several drawbacks to the traditional solution: • The delta

Figure 1-6. Three-Phase Connections, Delta-Wye Configuration, Internal Phase Compensation Problem 5: Zero-Sequence Current Sources Within the Zone o

contained in the CT circuit setup parameters. In the example shown in Figure 1-7, the compensation logic would require that the delta compensation be

Problem 6: Transformer Energization Inrush and Overexcitation General When the zone of protection includes a transformer, excitation and energization

Model and Style Number Description BE1-CDS240 electrical characteristics and operating features are defined by a combination of letters and numbers th

Operational Specifications Metered Current Values and Accuracy Current Range 5 Aac Nominal ...

Communication Ports ... 1-24 Displ

Energy Data Reporting Range 1 or 5 Ampere CT ... 100 MWh Units of Measure ...

Time Delay Setting Range ... 0.050 to 600 s Accuracy ...

Control Timer Setting Range ... 50 to 999 ms Accuracy...

81 Frequency Protection Pickup Setting Range ... 40.00 to 70.00 Hz Accuracy ...

Figure 1-9. Typical 87 Response Characteristic Curves 87ND Neutral Differential Protection Restrained Differential (87NDPU, 87NDT) Pickup Accuracy

1 Ampere CT Continuous Rating ... 4 A One second rating ...

Input Burden Burden values shown in Table 1-2 assume nominal value of input voltage applied. Table 1-2. Contact-Sensing Input Burden Style Option No

Display Type: Graphic LCD (liquid crystal display) with LED (light emitting diode) back-light. Operating Temperature: –40°C to 70°C (–40°F to 158°F

Physical Weight Unit Weight: 12 lb (5.4 kg) maximum Shipping Weight: Approximately 16.5 lb (7.5 kg) Case Configurations M Horizontal: Panel or 19&q

SECTION 1 • GENERAL INFORMATION Introduction The BE1-CDS240 Current Differential System is an economical, microprocessor based, multifunction system t

protection and control functions, metering functions, reporting and alarm functions, and various communication options. A highly flexible programmable

• Each output is programmable using BESTlogic (assign any virtual output to any physical output relay) and can be given a user meaningful name for th

Fuse Loss Protection • A fuse loss function, 60FL, protects against false tripping due to a loss of voltage sensing. Breaker Failure Protection • Fo

• The demand interval and demand calculation method is separately settable for phase, neutral and negative-sequence measurements. • The demand repor

• Seventy (70) alarm conditions are available to be monitored including user definable logic conditions using BESTlogic. Version Report • The versi

• Standard communications is an ASCII command interface to allow easy interaction with the relay using standard, off the shelf, communications softwa