72,5 kV

3AP1 FGHigh-Voltage Circuit-Breaker

http://www.ptd.siemens.de/en/circuitbreaker/index.htmmail: circuit.breaker@ptd.siemens.de

Siemens Aktiengesellschaft

Siemens AGPower Transmission and Distribution GroupHigh Voltage DivisionNonnendammallee 104D-13623 Berlin

The efficient High-Voltage Circuit-Breaker withSpring-Stored Energy Operating Mechanism

It has all the characteristics of a real professional. It worksreliably, safely and with utmost efficiency. Where is itdeployed? In every climatic zone on earth. References?In more than 80 countries worldwide. It´s the 3AP1 and it´sthe most powerful high-voltage circuit-breaker with aspring-stored energy operating mechanism from Siemens.

The design

We have applied the self-compression arc-quenchingprinciple. This principle makes the best possible use of theenergy of the arc to quench it, thus reducing the powerrequired by the operating mechanism.

Because of the low energy requirement, during develop-ment we were able to fall back in one of our operatingmechanism forms which has proved itself over a long time:the spring-stored energy mechanism.

Technical Data

The new 3AP1 FG circuit-breaker will be delivered com-pletely mounted on a breaker base and prefilled with arcquenching gas SF

6.

Rated voltage 72.5 kVRated current 2500 ARated short-time current 31.5 kA (1 - 3 s)Break time 3 cyclesFrequency 50 and 60 HzRated duty cycle O - 0.3 s - CO - 3 min - CO or

CO - 15 s - CORated power-frequencywithstand voltage 160 kV (1 min)Rated lightning impulsewithstand voltage 375 kV (1.2/50µs)Rated peak withstand current 85 kARated short-circuitbreaking current 31.5 kARated short-circuitmaking current 85 kA, peak

Electrical Data

48/60/110/125/220/250 V, DC120 up to 240 V, AC (50 Hz)120 up to 280 V, AC (60 Hz)

Motor Voltage

Whatever the application: reliable and economical

Years of experience in high-voltage switchgear has goneinto the design and production of the 3AP1 FG circuit-breaker. All the main components of the circuit-breaker areproduced in our own factories with the well-knownSiemens standards.

Spring-stored operating mechanism and interrupter unitshave proven their worth in worldwide daily use.

Clearance in airPhase to earth 700 mmAcross the opencircuit-breaker 700 mmMinimum creepagePhase to earth 2248 mmAcross the opencircuit-breaker 2248 mmPole spacing 1050 mm

Design Data

Height 2190 mmWidth 3233 mmDepth 760 mm

Dimensions

785 kg

Circuit-breaker Weight

25 years

Maintenance after

48 up to 250 V, DC

Control Voltage

Arc contact

Subject to change Order No.: 927 00481 176 APrinted in GermanyBy 0701 0.5

Major features

Self-compression interrupter chamber

Use of the thermal energy of the arc

Minimized energy consumption

High reliability for a long time

Completely premounted

Completely pretested

The transport unit contains the complete circuit-breaker

Less time is needed to erect and connect the breaker

Terminal plate

Contact support

Nozzle

Main contact

Heat cylinder

Base

Terminal plate