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Protection devices

SENTRON

Buildings, infrastructures, and industries are increasingly automated, and there are new technologies and stricter standards. These developments require intelligent solutions for power distribution and electrical installations. It is important to ensure high system availability and optimize energy consumption while protecting people and plants.

Miniature circuit breakers - 5SY

Siemens offers a complete range of miniature circuit breakers from 0.3 to 125 A in all required A, B, C and D characteristics. This means that all applications are covered.

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Miniature circuit breakers - 5SJ

Siemens offers a complete range of miniature circuit breakers from 0.3 to 125 A in all required A, B, C and D characteristics. This means that all applications are covered. Residential buildings and infrastructure applications, 6kA, IEC/EN 60898-1.

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Miniature circuit breakers - 5SL

For all applications from 0.3 A to 63 A with tripping characteristics B, C and D with a rated breaking capacity of 4500 A, 6000 A and 10000 A acc. To EN 60898-1.

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Miniature circuit breakers - 5SP

For all applications from 0.3 A to 125 A with a rated breaking capacity of 10000 A and 15000 A acc. To EN 60898-1. Applications for universal current from 0.3 A to 63 A, version 25 kA, acc. to EN 60947-2. (EN 60898-1/-2, EN 60947-2, UL 1077, CSA 22.2, GB 10963.1/.2)

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Additional components - 5ST/5TG

The Siemens mounting concept supports the combination of all 5ST3 additional components with 5SY and 5SP miniature circuit breakers and with 5SU1 RCBOs. 5SL and 5SY60. . miniature circuit breakers are suitable for mounting auxiliary switches and fault signal contacts.

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Additional components and covers - 5SW

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Basic devices RCCB - 5SV

RCCBs are used in all systems up to 240/415 V AC. Devices of type AC trip in the event of sinusoidal AC residual currents, type A also trips in the event of pulsating DC residual currents.

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RC units - 5SM

RC units are used in all supply systems up to 240/415 V AC. Devices of type AC trip in the event of sinusoidal AC residual currents, type A also trips in the event of pulsating DC residual currents. RC units are combined with miniature circuit breakers with A, B, C and D characteristics, provided that these are available in the MCB range.

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LV HRC Fuse system - 3NA/3ND

LV HRC fuse links with combination alarm signal the tripping of a fuse by a clear color change from red to white. This enables fast identification and replacement of the tripped fuse links. The insulated grip lugs made of metal are integrated in the top and bottom covers of the fuse link in molded plastic and provide greater safety during replacement.

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LV HRC Fuse system Bases - 3NH

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LV HRC Fuse system Accessories - 3NX

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DIAZED fuses - 5SA/5SB/5SD

The DIAZED fuse system is one of the oldest fuse systems in the world. It was developed by Siemens as far back as 1906. It is still the standard fuse system in many countries to this day. It is particularly widely used in the harsh environments of industrial applications. The series are available with rated voltages from 500 V to 750 V.

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DIAZED fuse bases - 5SF

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NEOZED fuses - 5SE

The NEOZED fuse system is primarily used in distribution technology and industrial switchboard assemblies, 2 - 100A. The NEOZED fuse bases are the most cost-effective solution for using NEOZED fuses. All NEOZED bases must be fed from the bottom to ensure that the threaded ring is insulated during removal of the fuse link.

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MINIZED fuses - 5SG

The MINIZED switch disconnectors are primarily used in switchboard assemblies and control engineering. They are approved for switching loads as well as for safe switching in the event of short circuits. The MINIZED D02 is also suitable for use upstream of the meter in household applications in compliance with the recommendations of the VDEW according to TAB.

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Fuse bases/caps and accessories - 5SH

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SITOR Semiconductor fuses - 3NE

SITOR semiconductor fuses protect power semiconductors from the effects of short circuits because the super quick-response disconnect characteristic is far quicker than with conventional LV HRC fuses. Operationel class: gR, aR, gS.

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Fuse Switch Disconnectors up to 630 A - 3NP

Fuse switch disconnectors are used for occasional load switching and provide reliable isolation from the infeed. The ability to use fuses with LV HRC design means the system can be protected against short circuit and overload.Five sizes available for LV HRC fuses sizes NH000 to NH3. 1, 3 and 4-pole devices.

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Molded case circuit breaker (MCCB) - 3VA

The 3VA molded case circuit breaker is a well thought-out, modular and highly variable system which is specifically designed to provide optimum support in every process step – from engineering to daily operation of the electrical power distribution system.

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Main Control and EMERGENCY-STOP Switch - 3LD

Main Control and EMERGENCY-STOP Switches from 16 to 250 A. Compact, narrow design saves space. Flexibility thanks to numerous application options. Locking capability during maintenance work. A wide range of accessories available. Comprehensive support through provision of CAx data.

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Switch disconnectors - 3KD

Switch disconnectors up to 1600 A. Complete assemblies: 3- and 4-pole switch disconnectors with front operating mechanisms, connections in form of box terminal or flat terminal including direct operating mechanism with gray handle.

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Switchers - 5TL

Main control and EMERGENCY-STOP switches from 16 A to 63 A.

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Switch devices - 5TE

Control and automatic functions always employ electrical switching. Remote control switches for pulse controls, switching relays, or Insta contactors then switch the electrical loads. Our BETA low-voltage circuit protection offers a wide variety of contact versions and rated currents for the different requirements of these devices.

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Switching Devices - 7LF

Digital time switches, mechanical time switches, timers for buildings an industrial applications.

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Monitoring Devices for Electrical Values - 5TT

Residual current monitors (RCMs) enable the detection of system malfunctions and facilatate troubleshooting before the protective device is switched off, which increases plant and operating safety, and cuts costs. Current relays monitor, for example, emergency lighting installations and motor loads.

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Energy monotoring devices - 7KT/KM

The compact and powerful 7KT/7KM PAC energy monitoring devices precisely and reliably detect the power values of electrical feeders and individual consumers.They are communication-capable and equipped with an Ethernet interface as standard. The free software powerconfig is available for configuration, which greatly simplifies the setting up of multiple measuring devices.

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Over voltage protection devices - 5SD

5SD - Over voltage protection devices, there are nearly a million lightning strikes each year – a risk best avoided. BETA surge arresters offer protection against overvoltage from the infeed to the socket. As a result, systems and plants, as well as expensive devices are protected and consequential economic damage aused by system, plant, and device failure is prevented.

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