ACX

ANSI C37 / IEEE 693 / IEC 62271 / SN-29.3a

Aluminium Center BreakDisconnect Switch15 TO 345 kv / 1200 TO 4000A

Switch In to the Next Generation

PRODUCT FEATURES

Aluminum current carrying parts design braid less

Silver-to-Silver self-wiping contacts

Reversed loop design on hinge and jaw sides

Righ contact pressure for maximum short-circuit with stand

Weather resistant hinge rotating contacts

Horizontal and Vertical mounting through 245kV

Full copper version available

MindCore Technologies ACX (ACXV) is a station class center break switch with option-al V shape configuration, that is designed to utilize the high strength and lightweight characteristics of aluminum alloys, combined with time-tested silver coated copper contacts in a low cost disconnect solution. The current carrying path is exempt braid and assures contact pressure with contact fingers for maximum conductivity over time. Copper contacts are tinned at attach point to aluminum surfaces to prevent galvanic corrosion and are further protected by an inhibitor on the aluminum sur-faces. The ACX switch is the new generation of high quality, low maintenance and ultra robust product designed by MindCore Technologies to maximise your return on investment lasts for decades to come.

APPLICATIONCentre break switches are versatile, multi-use with a wide variety of applications. The ACX can be applied in substations for isolating, by-passing, sectionalizing or a line tap off switch. The switch may be mounted in the horizontal upright configu-ration and, for ratings up to and including 750 kV BIL, in the vertical and under hung mounting positions also. A switch equipped with arcing horns may be used to interrupt small values of line charging or transformer magnetizing current. Center break switches offer the advantage of utilizing only six insulators per switch, saving money on installation and if replacement insulators are required. These switches also useful when overhead bus clearances are small and the “V” con-figuration can fit on single point mounting structures.

CONTACT

Silver-to-silver, high pressure contacts provide maximum dependability under normal and short circuit conditions. The jaw and hinge contact assembly employs the reverse loop configuration, exploiting the magnetic effect of increasing current to increase the contact pressure during short circuit conditions. Normal contact is maintained by insulated stainless steel compression springs, located inside the loop formed by the female contact fingers. The contact fingers are of high conduc-tivity, silver inlay, hard drawn copper and the contact housing is a high conductivity, aluminum extrusion. The male contact is also hard drawn copper, heavily silver inlay. Both male and female contacts are easily replaceable. Due to the shape of the male contact bar, a cam action is developed which gives a high mechanical advantage for applying contact pressure. Also, because of this shape, the contact pressure with the blades closed remains unchanged with nominal variations in alignment or adjustment.

BLADE AND OPERATING mEChANISm

The blade is either high conductivity aluminium or copper alloy pipe. Controls are normally arranged to allow positive over centre toggle, locking in both the open and the closed positions. The ACX switch may be operated either manually or by a motor operator.

GROUND SWITCh

A three pole combined grounding switch may be fitted to either end of an ACX disconnect. This switch features high momentary, high pressure contacts and an aluminium blade. The ground switch can be mechanically interlocked with the main switch to prevent inadvertent grounding of the circuit.

OPTIONNAL FEATURES

- Full copper version available- Arcing horns- Auxiliary contacts adaptable on any vertical operating pipe- Open/close position indicator- Key interlock hardware provision- Seismic rated support structure- Electrical interlock- Grounding device- Any specific customer requirement

OPERATORS - Manual torsion handle- Manual worm gear- Manual hand wheel- Motor operator 180 degree (MSO1/2)

TERmINAL PADS

Terminal pads have holes spacing in accordance with NEMA 4 or 6 holes standards (depending on amperage) and are machined flat to ensure low contact resistance. The terminal pads are pivoted on a hard drawn copper shaft which permits rotation of the switch blades without the rotation of the terminal pads.

SWITCh BASEIn order to ensure superior rigidity at the lowest cost, three types of bases are used. On switches up to 69 kV, switch bases will be fabricated by break forming steel plate into a “top hat” profile as seen on the previous page. Bases for switches rated 115 kV to 161 kV add welded gussets to ensure rigidity. 230 kV to 345 kV switch bases are fabricated by break forming steel plate to a channel shape and welded with cross channels.

PIvOT ASSEmBLIESSealed stainless steel bearings are greased for life and are TRULY maintenance free. Low temperature Microgel grease is used with a corrosion inhibitor.

ICE BREAkINGThis type of switch is inherently a good performer under iced conditions. In the open position, only the male contact is exposed to ice. The closing action stresses the ice in shear and easily breaks the ice away. In the closed position, both male and female contacts are protected from the ice, hence opening an iced ACX switch is very easy. Any ice accumulation bridging the terminal pads and the hinge end contact housing are stressed in tension and break away easily.

“v” CONFIGURATION

The “V” switch configuration allows for low profile substation installations. It is also well suited to being installed on poles in phase-over-phase or phase opposite arrangements for transmission line applications.

C O N TA C T

Rated Maximum Voltage

Rated Lightning Impulse

Rated Continuous Current

Withstand Short‐time Current

Terminal to Terminal Length

Terminal Pad Height

WidthStandard Mounting 

Holes Length*Standard Mounting 

Holes WidthWeight

kV RMS kV Peak A kA in (mm) in (mm) in (mm) in (mm) in (mm) lbs (kg)ACX01512 1200ACX01520 2000ACX02512 1200ACX02520 2000ACX03412 1200ACX03420 2000ACX04612 1200ACX04620 2000ACX07212 1200ACX07220 2000ACX11512 1200ACX11520 2000ACX13812 1200ACX13820 2000ACX16112 1200ACX16120 2000ACX23012 1200ACX23020 2000ACX24512 1200ACX24520 2000ACX34512 1200ACX34520 2000

* Can be change to match any structure

164(74)

186(84)

71"(1803)

8 ¼"(210)

86"(2184)

8 ¼"(210)

41"(1041)

8 ¼"(210)

55"(1397)

8 ¼"(210)

31"(787)

8 ¼"(210)

34"(864)

8 ¼"(210)

35"(889)

8 ¼"(210)

278(126)

837(380)

1304(592)

987(448)

1209(548)

295(134)

624(283)

668(303)

12"(305)

12"(305)

98"(2489)

8 ¼"(210)

111"(2819)

128"(3251)

147"(3734)

12"(305)

1300

650

750

47 ⅝"(1213)

69"(1752)

78 ½"(1994)

116"(2947)

130 ⅛"(3306)

86"(2185)

63140 ⅜"(3565)

80 ⅜"(2041)

7 ⅝"(194)

7 ⅝"(194)

41 ⅜"(1051)

900

1050

350

550

63

63

35 ⅜"(899)

122 ⅜"(3108)

92 ⅜"(2346)

107 ⅜"(2718)

63

53 ⅜"(1356)

68 ⅜"(1737)

234(106)

15.5

7 ⅝"(194)

7 ⅝"(194)

7 ⅝"(194)

7 ⅝"(194)

7 ⅝"(194)

7 ⅝"(194)

7 ⅝"(194)

104"(2643)

20 ⅝"(524)

23 ⅝"(600)

32 ⅞"(832)

43 ⅛"(1095)

7 ⅝"(194)

7 ⅝"(194)

Catalogue Number

27

38

63

110

150

200

250

63

63

48.3

245

252

362

72.5

123

145

170

27 ⅜"(695)

30 ⅜" (772)

63

63

63

63

MindCore Technologies

1845 Jean-Monnet

Terrebonne (Quebec) J6X 4L7

Canada

Tel: +1 450.477.5959

Fax: +1 450.477.2220

www.mindcoretech.com

info@mindcoretech.com

TEChNICAL DRAWING

SPECIFICATIONS

ANSI C37 / IEEE 693 / IEC 62271 / SN-29.3a