power distribution

Double BreakRotary Isolator

Type tested design

Manual or motor operated

System voltage 33kV/66kV

Australian design and manufacture

Rated short time withstand current 31.5kA (3 seconds)

POWER THROUGH INNOVATION

Double Break Rotary Isolator

Applications:• Feeder isolators• Switchyards• Zone substations• Traction installations• Relocatable substations• Mobile mining substations

General arrangementThe Ampcontrol double break rotary isolator has been type tested by a NATA approved testing authority and complies with Australian Standard AS 1306 - 1985 and IEC 60129 amendments parts I and II. Options exist to supply the unit partially assembled or in a basic flat pack assembly.

Basic unitThe basic triple pole rotary isolator can be supplied with two 2900mm high galvanised steel support columns and is padlockable in the on and off positions. All isolators are supplied with a manual operating handle and linkages. Operating shaft lengths can be customised to suit individual requirements. Mounting options include utilising the support columns, pole mount or assembly onto a switchroom roof.

Features/Benefits:• Australian design and manufacture to suit local conditions• Engineering support readily available - application assistance• Low maintenance - cost effective• Type tested design complies to Australian and IEC Standards - reliability assured• Positive 2:1 switch movement provides ease of operation• Motor operated open/closing mechanism option available (type tested)• Part assembled option simplifies installation• Load and/or line side earth switch option available• Integrated mechanical interlocking ensures failsafe operation• Security key option enhances operator safety

POWER THROUGH INNOVATION

Double Break Rotary Isolator

Motor operatorAs an alternative to manual operation, a type tested design DC motor drive assembly can be fitted to the isolator in lieu of the operating handle. The motor control assembly is fully self contained and supplied in an IP66 metal enclosure.

Simplified installationThe isolator is available in both flat pack and part assembled formats ready for installation. The part assembled option can reduce the amount of time required on-site and simplifies the switchgear installation.

The ground level erection process requires only four stages - stand the two support columns, position the base frame on the columns, mount operating handles and fit interconnecting rods. Final inspection and operational checks follow.

Flicker bladesStainless steel flicker blades can be supplied for installations requiring the breaking of low currents associated with system stored energy, such as line charging currents in cables or overhead lines.

Rotary isolator auxiliary contactsTo allow status signalling for manually operated isolators a separate position indicating switch can be provided in an IP66 metal enclosure.

Earth switchesEarth switches can be fitted for load and/or line side operation and are provided with a mechanical interlock to prevent simultaneous closing onto the isolator. All standard earth switches are supplied with a manual operating handle and linkages. Earth switch auxiliary contacts are also available.

Solenoid interlockThe operating handle can be fitted with an electrical solenoid interlock arrangement complete with auxiliary contacts. A mechanical key style interlock kit can also be implemented

Accessories • Galvanised support columns • Security key interlock adaptor kit• Earth switch auxiliary contacts• Earth switch position indication flags• Flicker blades• Rotary isolator auxiliary contacts• Motor operator 110VDC • Solenoid interlock kits

AMPCONTROL POWERAmpcontrol SWG ABN 78 001 737 5336 Martin DriveTomago NSW 2322Phone: (02) 4964 8288Fax: (02) 4964 8555 power@ampcontrolgroup.comwww.ampcontrolgroup.com

Description Value

System highest primary voltage 36kV rms 72.5kV rms

System nomial primary voltage 33kV 66kV

Rated short-time withstand current for 3 seconds 31.5kA rms 31.5kA rms

Phases per unit 3 3

Impulse - flashover co-ordinated 200kVp 325kVp

Rated frequency 50Hz 50Hz

Rated normal current 1250-2000A rms 1250-2000A rms

Rated peak withstand current 78.8kA 78.8kA

Class Outdoor Outdoor

Lightning impulse, full wave, either polarity - Phase to earth and between poles - Across open disconnector

200kVp230kVp

325kVp375kVp

Power frequency (1 minute) - Phase to earth (dry) - Across open disconnector (dry) - Phase to earth (wet) - Across open disconnector (wet)

70kV rms80kV rms60kV rms80kV rms

140kV rms160kV rms140kV rms160kV rms

Technical Ratings

Test report No. 101187IEC 60129: 1984 with amendments No's 1 and 2 (Mechanical endurance: motor operator/disconnector/earth switch - 1000 operations).AS1306 - 1985 High voltage AC switchgear and control gear - disconnectors (isolators) and earthing switches (Mechanical endurance: motor operator/disconnector/earth switch - 1000 operations).AS2395 - 1980 Terminals for switchgear assemblies for alternating voltages above 1kV.AS2650 - 1986 High voltage AC switchgear and control gear - common requirements.

Isolator and earth switch utilisemulti-contact parallel arrangement

Manual operating handle Earth switchoperating mechanism

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