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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In the current path, the I current is valid, when the transformer neutral current is connected to the device. Unbalanced loads create counter-rotating fields in three-phase induction motors, which act on the rotor at double frequency. For details see also in- formation at margin heading “Interaction siemes the Automatic Reclosing Function” These may be, for instance, nominal power system and transformer data, measured quan- tity polarities and their physical connections, breaker properties where applicable etc.
Page 53 Functions 2. The recommendations are given according to the standard IEC Breaker Failure Protection 50bf Functions 2. Jumper X90 has currently no function. Motor Protection Functions 2.
Siemens 7sj62 7sj6225 5eb90-1fe0/ff Fast
siemenss Oscillographic Fault Records Functions 2. In this example, the setting value is configured as secondary power in watts.
There are three mechanisms: If the three phase currents and the ground current from the current transformer starpoint are connected with the device, the sirmens of the four digitized currents must be zero. So the circuit breaker trip coil does not remain energized in the above case, R is derived as In radial systems, locating the ground fault is relatively simple.
Siemens SIPROTEC 7SJ62 Manual
Hard- ware adjustments to the power system data might be necessary. Turn off more accessible mode. To do so, the dialog box Hardware Test must be opened again to view the physical state of the binary inputs. This is recognized as soon as siemenx threshold value of the circuit breaker position detection parameter BkrClosed I MIN is exceeded in at least one phase. Furthermore, specific thresholds and settings of the select- ed function group are semens.
Page 92 Functions 2.
Temperature Measurement Check: Since all feeders from a common bus Figure deliver a capacitive charging current, nearly the total ground fault current of the system is available at the measuring point of the faulty line in the grounded system.
With RS and fiber optic interfaces, each connection is dedicated to one transmission direction. Types Of Commands Functions 2. Glossary Double command Double commands are process outputs which indicate 4 process states at 2 outputs: Page Glossary Object properties Each object has properties. Undervoltage Protection 27 Functions 2. The negative se- quence system detects voltage unbalance and can be used for the stabilization of the time overcurrent protec- tion.
7sj2 This appendix is primarily a reference for the experienced user. If set to Alarm Only, tripping is not possible and only a ground fault log is generated. There are tools for testing the system interface and the binary inputs and outputs sidmens the device.
Protection for Rail Electrification go. siemwns
SIPROTEC 7SJ62 – Digital Grid – Siemens
Sie,ens with the following data: Grounding of the cable shield must be effected at the cable’s side For busbar-side grounding of the current transformer, the current polarity of the device is changed via address The successful and safe operation of the device is dependent on proper handling, storage, installation, opera- tion, and maintenance.
The feedback information of the circuit breaker position injected via binary inputs is read out at the device and compared with the actual breaker position. Mounting and Commissioning This chapter is siemenz for experienced commissioning staff.
Synchronization Function Functions 2. De-energized Switching Functions 2.
If synchronism prevails the system is en- ergized, with asynchronous conditions it is not. Oscillographic records obtain the maximum information about the behaviour of the protection.
The operational mode of the ground fault detection can be set under address Siemeens Grounding is the total of all means and measured used for grounding. General Device Data Technical Data 4. They are suited for networks that are radial or looped, and for lines with single or multi-terminal feeds. Each phase and ground current is compared separately with the setting value or 50N-1 for each element. An approaching inrush resets an already running dropout time delay.
Ground Fault Location Functions 2. The starting protection function protects the motor from prolonged startup pro- cedures thus supplementing the overload protection see Section 2. Products for Power Quality and Measurement go. Fault Locator Functions 2. Page Page Page Page – A.