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General| Frequency | 50/60 Hz |
|---|---|
| Current Inputs | 4 |
| Current Transformer Input | 1 A or 5 A |
| Voltage Transformer Input | 100 V or 110 V |
| Operating Temperature Range | -25 °C to +70 °C |
| Binary Inputs | 8 |
| Communication Interfaces | IEC 61850 |
| Protection Functions | Overcurrent, Earth fault, Voltage, Frequency protection |
| Display | LCD |
| Mounting | rack mounting |
| Standards Compliance | IEC 60255 |
Describes the hardware structure and core functionalities of the SIPROTEC 4 7SA522 device, including analog inputs and output.
Details the selective and quick protection capabilities for overhead lines and cables, including teleprotection and fault locator integration.
Explains the core distance protection functionality, general settings, earth fault detection, and impedance calculation.
Covers protection functions for high-resistance earth faults, including definite time and inverse time stages.
Details time overcurrent protection functions used as back-up or emergency protection, including definite and inverse time stages.
Covers the integrated automatic reclosure function, including single-pole, three-pole, and multi-shot options.
Ensures network stability when switching a line onto a busbar by comparing feeder and busbar voltages.
Protects electrical equipment against unfavorable operational states like undervoltage and overvoltage.
Provides measurement of distance to a fault, improving line availability by faster fault location and clearance.
Provides rapid back-up fault clearance when the circuit breaker fails to respond to a trip command.
Details prerequisites, connection examples for CTs/VTs, current and voltage connections, and interface module configurations.
Covers checking data connections of serial interfaces, protection data communication, and system connections.
Provides procedures for test mode, time synchronization, system interface, and binary input/output checks.
Details earth impedance ratio, mutual impedance ratio, phase preferences, and earth fault detection parameters.
Lists modes, underreach and overreach schemes, and transmission channels for teleprotection.
Covers definite time, inverse time, zero sequence voltage, and zero sequence power stages.
Provides data for automatic reclosures, adaptive dead time, reduced dead time, and dead line check.
Details starting conditions, setting ranges for reactance, parallel line compensation, and load current correction.
Covers circuit breaker monitoring, initiation conditions, times, end fault protection, and pole discrepancy supervision.
Provides ordering codes for devices, accessories, communication converters, and interface modules.
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