SIPROTEC 7SJ61 Protection Relays
Multifunction protection relay with bay control for medium- and high-voltage networks
SIPROTEC 4
SIPROTEC 4 is a Siemens device family for protection, control, monitoring and station automation applications in power systems. The range includes protection relays for feeders, lines, transformers, busbars, generators and motors, as well as devices for breaker management, synchronization, high-speed busbar transfer and station automation.
Subcategories
SIPROTEC 7SJ62
Multifunction protection relay with overcurrent protection and control functions for medium-voltage networks
SIPROTEC 7SJ63
Multifunction protection relay with local control and overcurrent protection for medium-voltage networks
SIPROTEC 7SJ64
Multifunction protection relay with advanced overcurrent protection and local control for medium-voltage networks
SIPROTEC 7SJ66
Multifunction protection relay with control and monitoring functions for high- and medium-voltage networks
SIPROTEC 7SA6 Distance Protection
Siemens SIPROTEC 7SA6 is a digital distance protection relay for overhead lines and cables. The devices are used for selective and fast line protection in radial, ring and meshed power systems.
SIPROTEC 7SA522 Distance Protection
Siemens SIPROTEC 7SA522 is a digital distance protection relay for overhead lines and cables in transmission and subtransmission networks. It provides fast and selective fault clearance and is suitable for lines with or without series capacitor compensation.
SIPROTEC 7SD61 Line Differential Protection
Siemens SIPROTEC 7SD61 is a digital line differential protection relay for two line ends. The device protects lines and cables across all voltage levels and provides fast, phase-selective fault clearance via digital communication, fiber optic links or pilot wires.
SIPROTEC 7SD52/53 Line Differential Protection
Siemens SIPROTEC 7SD52/53 is a digital line differential protection relay for power transmission lines. The devices protect lines with two to six line ends across all power levels and combine differential protection, distance protection, fault location and secure communication via fiber optic links, communication networks or pilot wires.
SIPROTEC 7UT6 Differential Protection
Siemens SIPROTEC 7UT6 is a series of digital differential protection relays for transformers, generators, motors, reactors, short lines and busbars. The devices provide fast and selective short-circuit protection and, depending on the version, can monitor multiple three-phase measuring locations or single-phase measuring locations.
SIPROTEC 7SS52 Busbar Protection
Siemens SIPROTEC 7SS52 is a numerical protection system for busbar protection and breaker failure protection in medium-, high- and extra-high-voltage substations. The system provides selective zone tripping, very short tripping times and a modular, decentralized design for different busbar configurations.
SIPROTEC 7VK61 Breaker Management Relay
SIPROTEC 7VK61 is a breaker management relay for high- and medium-voltage switchgear. It supports circuit-breaker monitoring, control and diagnostics and provides functions for breaker status, switching commands, auto-reclosure and synchronism check.
SIPROTEC 7UM61 Machine Protection
SIPROTEC 7UM61 is a multifunction machine protection relay from the SIPROTEC 4 range. It is designed for small and medium power generation plants and protects generators and motors against ground faults, short circuits, overload, overvoltage and under- or overfrequency.
SIPROTEC 7UM62 Generator, Motor and Transformer Protection
SIPROTEC 7UM62 is a multifunction protection relay from the SIPROTEC 4 range for generators, motors and transformers. It is designed for small, medium-sized and large power generation plants and protects against ground faults, short circuits, overload, overvoltage, underfrequency, overfrequency and asynchronous operating conditions.
SIPROTEC 7VE6 Multifunction Paralleling Device
SIPROTEC 7VE6 is a multifunction paralleling device from the SIPROTEC 4 range for paralleling power systems and generators. It measures line and generator voltage, calculates voltage difference, frequency difference and phase angle, and supports close commands, voltage control and speed control during synchronization.
SIPROTEC 7VU683 High Speed Busbar Transfer
SIPROTEC 7VU683 is a high speed busbar transfer device based on the SIPROTEC 4 platform. It supports fast and reliable transfer from a main supply to a reserve supply when a fault or failure of the main infeed is detected. The device combines supply transfer, protection and monitoring functions for single-busbar and bus-coupler applications.
SIPROTEC 6MD61 I/O Box
SIPROTEC 6MD61 is an I/O box from the SIPROTEC 4 range for expanding binary inputs and outputs in switchgear. It can be used directly in the bay together with other SIPROTEC 4 devices or with SICAM PAS as a central process interface, supporting additional binary inputs and outputs for station automation applications.
SIPROTEC 6MD63 Bay Control Unit
SIPROTEC 6MD63 is a bay control unit from the SIPROTEC 4 range for control and monitoring tasks in switchgear. It is optimized for medium-voltage applications and can also be used in high-voltage switchgear. The unit supports reliable control of switching operations, acquisition of switch positions and operation through DIGSI 4 as well as a graphical local operating panel.
SIPROTEC 6MD66 High-Voltage Bay Control Unit
SIPROTEC 6MD66 is a high-voltage bay control unit from the SIPROTEC 4 range for control and monitoring tasks in high-voltage switchgear. It is designed as a control unit for high-voltage bays and provides integrated functions for switchgear control, local operation, monitoring and communication through DIGSI 4 and station automation systems.
SIPROTEC 7SK81 Motor Protection for Low-Power Current Transformers
SIPROTEC 7SK81 is a multifunction motor protection relay from the SIPROTEC Compact range for asynchronous motors of all sizes. The device is designed for applications with low-power current transformers, provides 4 low-power current transformer inputs and optionally 3 low-power voltage transformer inputs, and protects objects with rated currents from 20 A to 2500 A.