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This manual describes the functions, operation, installation, and commissioning of the device 7SJ62/63/64 V and for 7SJ63 V The functionality of the. Function overview. Description. Siemens SIP · 5 OvercurrentProtection/ 7SJ 5. 5/ 5/ Protection functions. • Time-overcurrent. of Siemens AG. Other designations in this manual might be trade- marks whose use by third parties for their own purposes would in- fringe the.

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Page of Go. When setting the Power System Data 1 see Section 2. Page 6 The operational equipment device, module may only be used for such applications as set out in the catalogue and the technical description, and only in combination with third-party equipment recommended or approved by Siemens.

The measurement of these statistical values is initiated upon energization of the motor. Voltage thresholds and time delays can be set individually for both elements.


For generators, motors and shunt reactors high-impedance protection can be used analogously. Impacts on protective func- tions to be taken into consideration are described in this section. If desired, fewer than 20 pairs can be entered. Sismens Time Overcurrent Elements 51, 51n Functions 2.

The protection function represents a thermal replica of the equipment to be protected overload protec- tion with memory capability. Page 23 Introduction 1. They operate with an inverse time characteristic either according to the IEC- or the ANSI-standard or with a user-defined characteristic.


They appear sirmens in the display after general interrogation of the device, in the sequence shown in the following figure.

Siemens 7sj62 7sj6225 5eb90-1fe0/ff Fast

Table Of Contents Contents Introduction 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. Sensitive Ground Fault Detection 64, 50Ns, 67Ns The directional functionality and the displacement voltage 7ej62 of this function cannot be applied since there is no displacement voltage. Mounting And Commissioning Mounting and Commissioning This chapter is intended for experienced commissioning staff.

Page 84 Functions 2. They are shown in the following figures. Therefore, only qualified people who are familiar with and adhere to the safety procedures and precautionary measures should perform the inspection steps.

Average Measurements Functions 2.

Products for Protection go. Table Initiating automatic reclosure A startup brings the machine from load operation into a temperature range far above the thermal restarting limit and the sismens is stopped.

In this example, the setting value is configured as secondary power in watts.

Testing User-defined Functions Mounting and Commissioning 3. Fault recording is running 2. In the following, the same line as illustrated in the example for ground impedance ratios above and additional data on the voltage transformers will be used: Page 57 Functions 2.

The line is energized and will remain in this state during the measurements. Two-phase Time Overcurrent Protection Protection Operating Quantities The two-phase overcurrent protection functionality is used in grounded or compensated systems where inter- action of three-phase devices with existing two-phase protection equipment is required.


A list with the desired infor- mation appears see Figure Furthermore, this type of connection is dealt with in the func- tional descriptions. Commissioning Mounting and Commissioning 3. Damage to drives, siemenw and other mechanic motor components can be avoided or reduced by means of quick motor shutdown.


The operational equipment device, module may only be used for such applications as set out in the catalogue and the technical description, and only in combination with third-party equipment recommended or approved by Siemens. Page 92 Functions 2. With these quantities ground active power and ground reactive power is calculated. System Data 2 The following information can therefore 7dj62 displayed via the Web Monitor.

Checking Connections Mounting and Commissioning 3. If synchronism prevails skemens system is en- ergized, with asynchronous conditions it is not. However, it com- prises important information that should be noted for purposes of personal safety as well as avoiding material damage.

This is recognized as soon as the threshold value of the circuit breaker position detection parameter BkrClosed I MIN is exceeded in at least one phase.