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Siemens 7SJ82 Manual 

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Siemens 7SJ82 User Manual
Siemens 7SJ82 User Guide
Siemens 7SJ82 Online Manual

Text of Siemens 7SJ82 User Guide:

  • Siemens 7SJ82, Overvoltage Protection with Zero-Sequence Voltage/Residual Voltage Overview of Functions The Overvoltage protection with zero-sequence voltage/residual voltage function (ANSI 59N): • Detects ground faults in isolated or arc-suppression-coil-grounded systems • Determines the phase affected by the ground fault • Works with electrical machines to detect ground faults in the stator winding Structure of the Function The Overvoltage protection with zero-sequence voltage/residual voltage function is used in protection function groups with voltage measurement. The Overvoltage prote

  • Example The following 2 figures show a CFC chart as an example for transformer tap control with the routing of the function keys for stepping up or stepping down. [schilocd-280316-01, 2, en_US] Figure 8-89 Routing of the Function Keys and CFC Signals To use the function keys, you create 2 user-defined single-point indications (SPS). These are used for the func- tion keys (

  • Siemens 7SJ82, 4 different control models are available: • Direct without feedback monitoring ( direct w. normal secur. ) • With reservation (SBO) 33 without feedback monitoring ( SBO w. normal secur. ) • Direct with feedback monitoring ( direct w. enh. security ) • With SBO with feedback monitoring ( SBO w. enh. security ) The next figure shows the command sources, command types, and control models. [dwsteuer-190912-01.tif, 1, en_US] Figure 8-1 Command Sources, Command Types and Control Models The figure shows the control models (right) with the

  • Checking the Closing Conditions in Synchronous Systems [losynsyn-100611-01.tif, 1, en_US] Figure 8-65 Closing Conditions when Switching Synchronous Systems The frequency difference is very low in the synchronous systems operating mode. It is below the threshold value f-threshold ASYN<->SYN. The status is signaled via the State f-synchronous indication. The parameters ΔV and Δα ar

  • Siemens 7SJ82, Overvoltage Protection with Positive-Sequence Voltage Overview of Functions The function Overvoltage protection with positive-sequence voltage (ANSI 59) is used to: • Detect symmetric stationary overvoltages • Supervise the voltage range if the positive-sequence voltage is the decisive quantity Unbalanced overvoltages, for example, caused by ground faults and unbalanced faults, are not detected due to the evaluation of the positive-sequence voltage. Structure of the Function The Overvoltage protection with positive-sequence voltage function is used in protection function groups, which are based on voltage measurement. The function Overvoltage protection with posit

  • Siemens 7SJ82, 7.2 Overcurrent Protection for Capacitor Banks......................................................................969 7.2.1 Overview ..................................................................................................................969 7.2.2 Overcurrent Protection, Phases for Protection of RLC Filter-Circuit Elements................969 7.2.2.1 Structure of the Function .................................................................................... 969 7.2.2.2 Function Description ........................................................................................... 970 7.2.2.3 Application and Setting Notes ..........................

  • Parameter: Max. Error Rate/min • Default setting (_:5161:106) Max. error rate per min = 1.0 % The Max. error rate per min parameter allows you to receive an error message on the number of faults per minute. An indication is then generated. Parameter: Disturbance Alarm After • Default setting (_:5161:107) Disturbance alarm after = 100 ms The Disturbance alarm after pa

  • Siemens 7SJ82, [dwocpga2-060213-01.tif, 5, en_US] Figure 6-32 Structure/Embedding the Function Overcurrent Protection, Ground – Advanced [dwocpgb1-060213-01.tif, 4, en_US] Figure 6-33 Structure/Embedding the Function Overcurrent Protection, Ground – Basic If the following listed, device-internal functions are present in the device, these functions can influence the pickup values and tripping delays of the stages or block the stages. The stage can also be affected by an external source via a binary input signal. • Automatic reclosing (AREC

  • Siemens 7SJ82, Other Functions Signal Filtering and Chatter Blocking for Input Signals Input signals can be filtered to suppress brief changes at the binary input. Chatter blocking can be used to prevent continuously changing indications from clogging the event list. After an adjustable number of changes, the indication is blocked for a certain period. The settings for indication filtering can be found at the individual signals. The next figure shows the settings using the example of a controllable (circuit-breaker switch position). i i NOTE For the circuit breaker or the disconnector, the settings of the software filter for spontaneous posi

  • Siemens 7SJ82, The analysis of the RMS values of the currents over a broad frequency band also includes the harmonic components. These harmonic components contribute to the temperature rise of the equipment. Current Influence The thermal replica based on the single-body model applies only with limitations to high overcurrent situa- tions (short circuits, motor startup currents). To avoid an overfunction of the overload protection, the thermal replica must be influenced in case of overcurrents (exceeding I threshold ). You can select between 2 strategies for this: • Freezing of the thermal memory • Limitation of the input current for the thermal replica to the set current. The temperature rise is t

  • Siemens 7SJ82, i i NOTE Since a slope coefficient of m < -4 is technically irrelevant, but could theoretically be the result of incorrect settings, the slope coefficient is limited to -4. If a coefficient is smaller than -4, the exponential function in the switching-cycles diagram is deactivated. The maximum number of switching cycles with I sc is used instead as the calculation result for the current number of switching cycles, as the dashed line with m = -4.48 shows in following figure. [DwCBWSlo, 1, en_US] Figure 10-37 Value Limitation of Slope Coefficient (1) Appl

  • Siemens 7SJ82, 5.5.2 Function-Group Type Capacitor Bank Diff................................................................... 225 5.5.2.1 Overview ............................................................................................................ 225 5.5.2.2 Structure of the Function Group........................................................................... 226 5.5.2.3 Information List................................................................................................... 228 5.5.3 Function-Group Type Capacitor Bank Side

  • Siemens 7SJ82, Measured-Value Acquisition Basic Principle SIPROTEC 5 devices are equipped with a powerful measured-value acquisition function. In addition to a high sampling frequency, they have a high measurand resolution. This ensures a high degree of measuring accu- racy across a wide dynamic range. The 24-bit sigma/delta analog-digital converter represents the core of measured-value acquisition. In addition, the oversampling function supports the high measurand resolution. Depending on the requirements of the individual method of measurement, the sampling frequency is reduced (Downsampling). In digital systems, deviations from the rated fr

  • Siemens 7SJ82, Application and Setting Notes (Advanced Stage) Binary Input Signal: Dynamic settings • Default setting (_:751:26) Dynamic settings = no Parameter Value Description no The influence on the overcurrent-protection stage by device-internal or external functions is not necessary. yes If a device-internal function (automatic reclosing function or cold-load pickup detection) or an external function should affect the overcurrent- protection stage (such as change the setting of the threshold value or time delay, blocking of the stage), the setting must be changed to yes. This make

  • Siemens 7SJ82, Signal Name Description Type Default Value if Signal Quality = invalid External health The binary input External health reflects the circuit-breaker status (EHealth). This input will be set by the CFC using the BUILD_ENS block. In turn, BUILD_ENS can query binary inputs that represent the conditions OK, Warning, or Alarm (as a result of the function Trip-circuit supervision). ENS Unchanged Position The signal Position can be used to read the circuit- breaker position with double-point indication. DPC Unchanged If the quality of the input signal assumes the status Quality = invalid, then the standby status (EHealth) of the Circuit-breaker function

  • Siemens 7SJ82, [lo_Seal-in_Rel2, 1, en_US] Figure 6-31 Logic Diagram of the Definite-Time Overcurrent Protection, Voltage-Released Undervoltage Seal-in, Part 2 Voltage Release In addition to the current criterion with undervoltage seal-in, a voltage-released logic must be present to issue the indication Pickup . The voltage-released logic monitors the negative-sequence voltage and phase-to- phase voltages respectively for detecting unsymmetrical faults and symmetrical faults. With the voltage- released logic, the setting value of the parameter Threshold can be reduced in a certain range and the relia- bility and sensibility of this function can be improved c

  • Siemens 7SJ82, current of phase currents is formed from the difference between the present current phasor and the current phasor of the previous period. This allows to take into account a jump of the current phase. i i NOTE If a voltage-transformer circuit breaker is installed in the secondary circuit of the voltage transformers, its position is communicated to the device via a binary input (see chapter 9.3.4.1 Overview of Functions). Switching onto a 3-Phase Measuring-Voltage Failure, Low Load Logic [lozuscha-100611-01.tif, 1, en_US] Figure 9-8 Logic Diagram Switching to 3-Phase Measuring-Voltage Failure Switching onto a 3-phase measuring-voltage failure is detected if the following criteria are fulfille

  • Siemens 7SJ82, AC Phase A changed over with phase C BC Phase B changed over with phase C AB Phase C changed over with phase B i i NOTE If you change the setting value of the parameter Inverted phases, consider the following: The device can take the new setting value only if the binary input signal >Invert Phases is not active. Input signal: >Phs-rotation reversal The >Phs-rotation reversal binary input is used to switch between the ABC phase sequence and the ACB phase sequence. The switchover direction depends on the set

  • Siemens 7SJ82, Inrush-Current Detection Overview of Functions The function Inrush-current detection • Recognizes an inrush process on transformers • Generates a blocking signal for protection functions that protect the transformer (protected object) or for protection functions that are affected in undesirable ways when transformers are switched on • Allows a sensitive setting of the protection functions The following protection functions evaluate the blocking signal • Overcurrent protection with a pickup valu

  • [losynaw2-100611-01.tif, 1, en_US] Figure 8-73 Connection of the AREC to the Synchronization Function With External Control You have the option of controlling the synchronization function externally via binary input signals. This can be done as follows: • Edge-controlled • Via the signals >Start syn. process and >Stop syn. process • State-controlle

  • Siemens 7SJ82, If you set the 3I0 criterion parameter to Direct release, you prevent the plausibility check of the zero-sequence current. In this way, a pickup only by way of this current can be achieved. With the Threshold 3I0 dir. release parameter, you set the threshold value to be exceeded. If you set the I2 criterion parameter to Direct release, you also switch off the plausibility check of the negative-sequence current. With the Threshold I2 dir. release parameter, you set the threshold value to be exceeded. If you set the I2 criterion parameter to Direct release, plausibility is

  • Siemens 7SJ82, Indication Type Group Warning Explanation Power-system data:meas. point I-3ph:superv. Phsseq.I: (_:71) Failure SPS CFC Failure of the current phase-rotation supervision (see chap. 9.3.12.1 Over- view of Functions ) Power-system data:meas. point I-3ph:superv. Sum I (_:71) Failure SPS CFC Failure of the current sum (see chap. 9.3.11.1 Overview of Functions ) Power-system data:meas. point I-3ph:superv.ADC sum.I: (_:71) Failure SPS CFC Failure of the quick current sum (see chap. 9.4.2.1 Overview of Functions) The failure indication indicates a fault in the analog-digital converter at the power input. • Check the exterior wiring. • If the fault is not re

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