766e- driescher con cámaras de extinción de arco en vacío

15/9

715/97

DRIESCHER Outdoor Load-Break Switches FLa 15/97

Three-pole design

Rated voltages12 kV, 24 kV, 36 kV and 38.5 kV

Rated currents 400 A and 630 A

ELEKTROTECHNISCHE WERKEFRITZ DRIESCHER & SHNE GMBH:D-85366 MOOSBURG TEL. (+49 87 61) 6 81-0 FAX (+49 87 61) 6 81-1 37http://www.driescher.de eMail: Driescher@aol.com

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DRIESCHER-Outdoor Load-Break Switches FLa 15/97

Vacuum Switching

There is a trend towards vacuum switching

In the seventies, basic research into vacuum swit-ching was started in Germany. At that time, small-volume oil switches had become established in medi-um-voltage systems through decades of reliable ope-ration, and had become accepted by users as safeequipment. Laboratory tests revealed that vacuumswitches are in many ways superior to traditional swit-ching arrangements.

In distribution systems, the most important criterion issafe electricity supply, and it is not high numbers ofoperating cycles but a high degree of reliability thatmatters. Even after many years of useful life, theequipment must be capable of performing makingand breaking operations safely.What is required is switching elements whose electricproperties will change as little as possible throughouttheir useful lives. Vacuum interrupters are sealed her-metically, and extremely pure materials ensure thatthe vacuum required for safe switching will be preser-ved over their entire useful lives. Even contact resi-stance will remain at very low values because in avacuum there is no oxydation process.

The advantages of the open-air load-breaking switches Fla 15/97 over outdoor load-breaking switches with conventional arc-extinguishing media are as follows:

faster dielectric recovery of the break distance after each breaking operation;

high dielectric strength of the break distance;

short total travel and, hence,

compact drive mechanism;

less wear on contacts and, hence

longer useful life.

2

DRIESCHER-Outdoor Load-Break Switches FLa 15/97

General

Unlike arc extinction in oil which has up to now beencustomary in outdoor load-break switches, arc interrup-tion in the newly-developed outdoor load-break switchFla 15/97 is carried out in a vacuum interrupter.

By virtue of an insulation system developed byDriescher (patent pending), no liquid or gaseous medi-um will be required for external electric strength1) either.

The outdoor load-break switch Fla 15/97 is thereforesuitable even for special applications (including duty inwater-conservation areas). The outdoor load-breakswitch Fla 15/97 is available for rated voltages of 12 kVto 38.5 kV, and for rated currents of 400 A and 630 A.

Through the use of adapter parts, it will be possible touse vacuum interrupter chambers even for retrofittinginstalled equipment of the Fla 15/60 family.

1) concerning the Vacuum interrupter

Specifications

Rated voltageRated currentRated mainly active load currentRated closed loop distribution circuit currentRated cable charging currentRated earth fault current

Rated cable and line-charging currentunder earth faults

Rated peak withstand currentRated short-time withstand current (1 sec.)

kVAAAAA

A

kAkA

12400 / 630

63063025200

32

4016

24400 / 630

63063025200

32

4016

5060

125145

38.5400 / 630

630630

-200

32

4016

8090

180210

36400 / 630

630630

-200

32

4016

7080

170195

Rated power frequency withstand voltage

Rated impulse withstand voltage

phase-earth / phase-phaseopen gap

kVkV

2832

phase-earth / phase-phaseopen gap

kVkV

7585

3

Guide

Compression spring

Stop pad

Push rod

Eccentric disc

Bearing

Compression spring

Guide ring

Sleeve

Vacuum interrupter chamber

Protective cover

Housing

1

2

3

4

5

6

7

8

9

10

11

12

Overview

ELEKTROTECHNISCHE WERKEFRITZ DRIESCHER & SHNE GMBH:D-85366 MOOSBURG TEL. (+49 87 61) 6 81-0 FAX (+49 87 61) 6 81-1 37http://www.driescher.de eMail: Driescher@aol.com

Ordering No. 3-81701600 03-99

Measures, weights, drawings and descriptions in this list are not binding and are subject to change without notice!

Printed on chlorine free bleached paper. For natures sake.