The SIPROTEC 4 7SJ62 relays can be used When protecting motors, the 7SJ62 relay is suitable and manual electric tripping is no longer. Applicability of this Manual. This manual applies to: SIPROTEC 4 Multi- Functional Protective Relay with Local Control 7SJ62/64; firmware. This manual is valid for: SIPROTEC 4 Multi-Functional Protective Relay with Local. Control 7SJ62/63/64; firmware version V Indication of.
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Inverse Time-overcurrent Protection 51, 51n Set Points For Statistic Discrepancies in the wiring or the configuration can be quickly found and solved.
This time is started and maintains the pickup condition if the current falls below the threshold. Testing User-defined Functions Mounting and Commissioning 3.
Jumpers X to X must be set to the same position! They are marked with letters explained in the following table. Determination of the Reverse Power The reverse power protection evaluates the active power from the symmetrical components of the fundamental harmonics of the voltages and currents. For housing size Figure and Figure 4 covers and 4 holes for securing the device, for housing size Figure 7sj2 are 6 covers and 6 holes for securing the device.
There are two elements each available for overvoltage protection and undervoltage protection. General Setting Procedure This has to be communicated to the device as digitalized measured value via the interface.
This diagram allows the number of yet possible trips to be determined for tripping with equal tripping current. With the corresponding allocation configuration these messages are entered in the event list, thus serving as a report.
Programming Directional Overcurrent Settings Inverse Time Overcurrent Elements 51, 51n Functions 2. Settings For Phase Overcurrent Protection 7s6j2 De-energized Switching Functions 2. Direction Check Manusl Load Current Page 83 Functions 2. Inverse Time Characteristic toc Functions 2. Description Of Fuse-failur-monitor Page Appendix A. Multi-functional protective relay with local control pages. Dynamic Cold Load Pickup Functions 2. For generators, motors and shunt reactors high-impedance protection can be used analogously.
In particular, they must have the same transformer ratios and approximately identical knee-point voltage. Protection Function Logic In the example, the reference voltage transformers V are the ones of the transformer high side, i.
Transient Manuql Fault Function go. This is recognized as soon as manuwl threshold value of the circuit breaker position detection parameter BkrClosed I MIN is exceeded in at least one phase. Glossary Metered value Metered values are a processing function with which the total number of discrete similar events counting pulses is determined for a period, usually as an integrated value. The parameters and the different procedures are explained in the setting notes of this function see Section 2.
Siemens SIPROTEC 7SJ62 Manual
The reactance setting enables the protective relay to indicate the fault location in terms of distance. Thermal Overload Protection 49 Functions 2. Failure of the measuring voltage in one or two poles can be detected, and the directional time overcurrent elements Dir Phase and Dir Ground can be blocked see logic diagrams. mnaual
Changing the distance unit does not imply an automatic conversion of the setting values that are dependant on the dis- tance unit.
Depending on the functional scope specified during config- uration of the protective functions in addresses Charac. Jumper X90 has currently no manusl. Routine Checks And Maintenance You work with data which are stored in files. User-defined Functions cfc Technical Data 4. Average Manyal Functions 2. Current input Function Time overcurrent protection ground Section 2.
CB ready monitoring window 79M Auto Recl. Page 93 Functions 2.
Information List Functions 2. Dynamic Cold Load Pickup Function Based on the following information, it can also be determined which of the provided functions should be used. The same applies to 79 AR 50N-1 inst.
If T-reset expires and no new ground fault is recorded during that time, all memories are reset and the protection resumes normal position. Page 46 Functions 2. Functions using zero-sequence voltage must be disabled.
SIPROTEC 7SJ62 – Digital Grid – Siemens
Glossary Protection devices All devices with a protective function and no control display. If only the definite time elements are desired, the address 46 should be set to Definite Time. Load Jam Protection 51m Functions 2. Page 69 Functions 2.