9424200994 Rev U
363
BE1-11
g
Configuration
Configuration
BE1-11
g
inputs consist of three-phase current inputs and ground, three-phase voltage inputs, and one
auxiliary voltage input. Either one or two sets of CTs are provided in the BE1-11
g
depending on the style
number. Refer to the style chart for more information. Each input is isolated and terminated at separate
terminal blocks. This section describes the function and setup of each input, and provides the equations
that the BE1-11
g
uses for calculating the power quantities.
Power System Measurements
Power system inputs, as described in the introduction, are sampled 32 times per cycle by the BE1-11
g
.
The BE1-11
g
measures the voltage and current from these samples and uses those measurements to
calculate other quantities. Frequency is measured from a zero-crossing detector. Measured inputs are
then recorded every quarter-cycle. If the applied voltage is greater than 10 volts, the BE1-11
g
measures
the frequency and varies the sampling rate to maintain 32 samples per cycle. Frequency compensation
applies to all power system measurements. Power system inputs are described in the paragraphs under
the following headings:
Current Measurement, Voltage Measurement, Frequency Measurement,
and
Power Measurement.
Current Measurement
Secondary current from power system equipment CTs is applied to current transformers inside the
BE1-11
g
. These internal transformers provide isolation and reduce the monitored current to levels
compatible with BE1-11
g
circuitry. Secondary current from each internal CT is converted to a voltage
signal and then filtered by an analog, low-pass, anti-aliasing filter.
Current Measurement Functions
Input waveforms are sampled by an analog-to-digital converter (ADC) at 32 samples per cycle. The
BE1-11
g
extracts the magnitude and angle of the fundamental components of each three-phase current
input and the magnitude and angle of the independent ground current input.
Positive-Sequence, Neutral and Negative-Sequence Current Measurement
Positive-sequence (I1), neutral (3I0), and negative-sequence (I2) components are calculated from the
fundamental component of the three-phase current inputs. The BE1-11
g
can be set to accommodate ABC
or ACB phase-sequence when calculating the positive- or negative-sequence component.
Fast Current Detector
A separate, fast current measurement algorithm is used by the breaker failure function and the breaker
trip-speed monitoring function. This measurement algorithm has a sensitivity of 5% of the CT rating (5A or
1A depending on style number) and detects current interruption in the circuit breaker much more quickly
than the regular current measurement functions. This measurement algorithm monitors only the phase
current.
Voltage Measurement
Three-phase voltage inputs are reduced to internal signal levels by a precision resistor divider network. If
the BE1-11
g
is set for single-phase or four-wire VT operation, the measuring elements are configured in
wye. If the BE1-11
g
is set for three-wire VT operation, the measuring elements are configured in delta.
Voltage Measurement Functions
Input waveforms are sampled by an analog-to-digital converter (ADC) at 32 samples per cycle. The
BE1-11
g
extracts the magnitude and angle of the fundamental components of each three-phase voltage
input and the magnitude of the auxiliary voltage input.
Содержание BE1-11g
Страница 1: ...INSTRUCTION MANUAL FOR BE1 11g Generator Protection System Publication 9424200994 Revision U Jul 17...
Страница 2: ......
Страница 21: ...9424200994 Rev U 9 BE1 11g Introduction Figure 1 Style Chart...
Страница 22: ...10 9424200994 Rev U Introduction BE1 11g...
Страница 36: ...24 9424200994 Rev U Quick Start BE1 11g...
Страница 44: ...32 9424200994 Rev U Controls and Indicators BE1 11g...
Страница 54: ...42 9424200994 Rev U Contact Inputs and Outputs BE1 11g...
Страница 61: ...9424200994 Rev U 49 BE1 11g Overexcitation 24 Protection Figure 40 Inverse Time Delay and Reset Time...
Страница 62: ...50 9424200994 Rev U Overexcitation 24 Protection BE1 11g...
Страница 68: ...56 9424200994 Rev U Sync Check 25 Protection BE1 11g...
Страница 74: ...62 9424200994 Rev U Phase Undervoltage 27P Protection BE1 11g...
Страница 82: ...70 9424200994 Rev U Negative Sequence Voltage 47 Protection BE1 11g...
Страница 88: ...76 9424200994 Rev U Phase Overvoltage 59P Protection BE1 11g...
Страница 94: ...82 9424200994 Rev U Auxiliary Overvoltage 59X Protection BE1 11g...
Страница 96: ...84 9424200994 Rev U Stator Ground 64G Protection BE1 11g...
Страница 100: ...88 9424200994 Rev U Vector Jump 78V Protection BE1 11g...
Страница 106: ...94 9424200994 Rev U Frequency 81 Protection BE1 11g...
Страница 150: ...138 9424200994 Rev U Power 32 Protection BE1 11g...
Страница 154: ...142 9424200994 Rev U Loss of Excitation Reverse Var Based 40Q Protection BE1 11g...
Страница 158: ...146 9424200994 Rev U Distance 21 Protection BE1 11g...
Страница 170: ...158 9424200994 Rev U Resistance Temperature Detector 49RTD Protection BE1 11g...
Страница 174: ...162 9424200994 Rev U Analog Input Protection BE1 11g...
Страница 192: ...180 9424200994 Rev U Logic Timers 62 BE1 11g...
Страница 198: ...186 9424200994 Rev U Breaker Control Switch 101 BE1 11g...
Страница 206: ...194 9424200994 Rev U Setting Groups BE1 11g...
Страница 236: ...224 9424200994 Rev U Alarms BE1 11g...
Страница 238: ...226 9424200994 Rev U Differential Reporting BE1 11g...
Страница 248: ...236 9424200994 Rev U Demands BE1 11g...
Страница 250: ...238 9424200994 Rev U Load Profile BE1 11g...
Страница 254: ...242 9424200994 Rev U Power Quality BE1 11g...
Страница 262: ...250 9424200994 Rev U Trip Circuit Monitor 52TCM BE1 11g...
Страница 272: ...260 9424200994 Rev U BESTnet Plus BE1 11g Figure 188 Power Quality Page...
Страница 274: ...262 9424200994 Rev U Mounting BE1 11g Figure 190 J Type Case Side Dimensions...
Страница 280: ...268 9424200994 Rev U Mounting BE1 11g Figure 196 Retrofit Mounting Plate Basler P N 9424200073 Part 2...
Страница 282: ...270 9424200994 Rev U Mounting BE1 11g Figure 198 H1 Rack Mount Case Dimensions...
Страница 283: ...9424200994 Rev U 271 BE1 11g Mounting Figure 199 H1 Panel Mount Case Dimensions...
Страница 289: ...9424200994 Rev U 277 BE1 11g Mounting Figure 206 Dovetailing Procedure...
Страница 290: ...278 9424200994 Rev U Mounting BE1 11g...
Страница 297: ...9424200994 Rev U 285 BE1 11g Terminals and Connectors Figure 215 Example of Reversed CT Polarity...
Страница 298: ...286 9424200994 Rev U Terminals and Connectors BE1 11g...
Страница 304: ...292 9424200994 Rev U Typical Connections BE1 11g...
Страница 324: ...312 9424200994 Rev U BESTCOMSPlus Software BE1 11g...
Страница 344: ...332 9424200994 Rev U BESTlogic Plus BE1 11g...
Страница 354: ...342 9424200994 Rev U Communication BE1 11g Figure 263 Modbus Mapping Screen...
Страница 367: ...9424200994 Rev U 355 BE1 11g Timekeeping Figure 275 Front Panel Circuit Board Backup Battery Location...
Страница 370: ...358 9424200994 Rev U Timekeeping BE1 11g...
Страница 374: ...362 9424200994 Rev U Device Information BE1 11g...
Страница 392: ...380 9424200994 Rev U Configuration BE1 11g...
Страница 396: ...384 9424200994 Rev U Introduction to Testing BE1 11g...
Страница 408: ...396 9424200994 Rev U Commissioning Testing BE1 11g...
Страница 422: ...410 9424200994 Rev U Sync Check 25 Test BE1 11g...
Страница 426: ...414 9424200994 Rev U Phase Undervoltage 27P Test BE1 11g...
Страница 442: ...430 9424200994 Rev U Phase Overvoltage 59P Test BE1 11g...
Страница 454: ...442 9424200994 Rev U Auxiliary Overvoltage 59X Test BE1 11g...
Страница 458: ...446 9424200994 Rev U Vector Jump 78V Test BE1 11g...
Страница 466: ...454 9424200994 Rev U Frequency 81 Test BE1 11g...
Страница 496: ...484 9424200994 Rev U Inverse Overcurrent 51 Test BE1 11g...
Страница 516: ...504 9424200994 Rev U Phase Current Differential 87 Test BE1 11g...
Страница 520: ...508 9424200994 Rev U Neutral Current Differential 87N Test BE1 11g...
Страница 526: ...514 9424200994 Rev U Power 32 Test BE1 11g...
Страница 530: ...518 9424200994 Rev U Loss of Excitation Reverse Var Based 40Q Test BE1 11g...
Страница 534: ...522 9424200994 Rev U Distance 21 Test BE1 11g...
Страница 560: ...548 9424200994 Rev U Virtual Control Switches 43 Test BE1 11g...
Страница 570: ...558 9424200994 Rev U Logic Timers 62 Test BE1 11g...
Страница 584: ...572 9424200994 Rev U Troubleshooting BE1 11g...
Страница 614: ...602 9424200994 Rev U Specifications 25 Hz Operation BE1 11g BESTlogic Plus Update Rate cycle...
Страница 622: ...610 9424200994 Rev U Time Curve Characteristics BE1 11g Figure 357 Time Characteristic Curve A Standard Inverse BS 142...
Страница 630: ...618 9424200994 Rev U Time Curve Characteristics BE1 11g Figure 365 Time Characteristic Curve G Long Time Inverse BS 142...
Страница 633: ...9424200994 Rev U 621 BE1 11g Time Curve Characteristics Figure 368 Time Characteristic Curve B Very Inverse BS 142...
Страница 638: ...626 9424200994 Rev U Time Curve Characteristics BE1 11g Figure 373 Time Characteristic Curve C Extremely Inverse BS 142...
Страница 672: ...660 9424200994 Rev U RTD Module BE1 11g...
Страница 694: ...682 9424200994 Rev U BESTCOMSPlus Settings Loader Tool BE1 11g...
Страница 705: ......