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ADB
ANSI C37 / IEEE 693 / IEC 62271
Aluminium Double BreakDisconnect Switch38 TO 500kv / 600 TO 4000A
MindCore Technologies ADB is a station class double break switch, designed to utilize the high strength and lightweight characteristics of aluminum alloys, combined with time-tested silver brazed copper contacts that are highly visible and easily replaceable. The center stack supports the blade and rotates to operate the switch. The blade swings through 65˚, either clockwise or counter-clockwise in a plane parallel to the switch base. Aluminum conducting joints are protected with an oxide inhibitor to prevent the formation of aluminum oxide. Copper contacts are tinned at attach point to aluminum surfaces to prevent galvanic corrosion and are further protected by an inhibitor on the aluminum surfaces. The ADB switch is a proven design and has been installed within the North American substations for the past 35 years.
PRODUCT FEATURES
APPLICATION
The most common application of the type ADB switch is as a bus tie switch where both ends of the switch may be energized. It is also preferred by substation engineers for isolating, bypassing or sectionalizing lines of electrical apparatus. Since the double break’s switch blade is never live when in the open position, overhead clearances and phase spacing can be kept to a minimum making the ADB an excellent choice for tight substation designs. The switch poles may be mounted in a horizontal upright, inverted or semi-inverted position. Switches up to 750kV BIL may also be mounted in the vertical position.
CONTACT
Silver to silver, high pressure, self-wiping, reverse loop female contacts provide maximum dependability under normal and short circuit conditions. Reverse loop contacts exploits the effect of increasing current to increase contact pressure during short circuit conditions. Normal contact pressure is maintained by insulated stainless steel compression springs. Female contacts are of high conductivity hard-drawn copper and the contact support is made from high conductivity aluminum alloy. The male contacts are of high conductivity copper that is secured to the blade contact seat. All contacts are silver brazed to ensure maximum durability.
Due to the shape of the contact surfaces, with the blade closed, the contact pressure remains unchanged with normal variations in alignment or adjustment. Both male and female contacts are easily replaceable.
BLADE AND OPERATINg mEChANISm
Rotation of the center insulator stack causes the blade to swing into the jaw and to rotate to engage contact. The blade operating mechanism is housed in an aluminum alloy housing which protects it from moisture and contamination. Self-lubricating bearings are used to support the blade and assure exceptionally low frictional effort in operation. The rolling mechanism provides wiping action of the contacts which helps to clean the contact surfaces during normal operation of the switch.
Aluminum current carrying parts design
Silver-to-silver, high pressure, self-wiping contacts
Reversed loop design on jaw sides
Rotating blade principle for excellent ice breaking ability
Weather and corrosion resistant housing
Standard 3 sets of NEMA terminal pads
Available in ‘W’ configuration for transmission applications
gROUND SWITCh
A three pole CGS or GAV combined grounding switch may be fitted to either end of an ADB 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.
TERmINAL PADS
Terminal pads have hole spacing in accordance with NEMA standards and are machined flat to ensure low contact resistance. All switches have two horizontal and a vertical terminal pads at both ends. Terminal pads are 4 holes NEMA for 1200A/2000A and 6 holes NEMA for 3000A/4000A.
SWITCh BASEA rigid base is essential to optimal switch operation. The galvanized base frame design is chosen adequately to suit the voltage and current level of the switch application.For our ADB design, we supply welded base frame con-struction for switches above 72kV.
PIvOT ASSEmBLIESThe pivot assembly is one of the key components for a disconnect long term durability. The ADB is using a pivot design that has been proven over the years and that went through a 0.5g seismic test, when installed on a 362kV- 1470kV AV2 model. Machined aluminum housing, sealed stainless steel bearing (tapered or ball) and robust stain-less steel shaft are the fundamental materials to be used for a REAL maintenance free pivot assembly.
OPTIONNAL FEATURES - Arcing horns
- High velocity whip
- Auxiliary contacts adaptable on any vertical operating pipe
- Open/close position indicator
- Key interlock hardware provision
- Electrical interlock
- Insulator outrigger fixed on base frame
- Multi-revolution grounding device
- Seismic rated support structure
- Any specific customer requirement
OPERATORS - Manual torsion handle
- Manual worm gear
- Manual hand wheel
- Motor operator 180 degree (MSO1/2)
- Motor operator multi-revolution (MSO5)
C O N TA C T
Rated Maximum Voltage
Rated Lightning Impulse
Rated Continuous Current
Withstand Short-‐time Current
Overall 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)
ADB03412 1200 44
ADB03420 2000 63
ADB03430 3000 63
ADB03440 4000 75
ADB04612 1200 44
ADB04620 2000 63
ADB04630 3000 63
ADB04640 4000 75
ADB07212 1200 44
ADB07220 2000 63
ADB07230 3000 63
ADB07240 4000 75
ADB11512 1200 44
ADB11520 2000 63
ADB11530 3000 63
ADB11540 4000 75
ADB13812 1200 44
ADB13820 2000 63
ADB13830 3000 63
ADB13840 4000 75
ADB16112 1200 44
ADB16120 2000 63
ADB16130 3000 63
ADB16140 4000 75
ADB23012 1200 44
ADB23020 2000 63
ADB23030 3000 63
ADB23040 4000 75
ADB24512 1200 44
ADB24520 2000 63
ADB24530 3000 63
ADB24540 4000 75
ADB34512 1200 44
ADB34520 2000 63
ADB34530 3000 63
ADB34540 4000 75
ADB50012 1200 44
ADB50020 2000 63
ADB50030 3000 63
ADB50040 4000 75
3" or 8 ¼"(76 or 210)
331(150)
1029(468)
1889(859)
1341 (610)
1667(758)
406(185)
872(396)
963(438)
12"(305)
12"(305)
8 ¼"(210)
12"(305)
267(121)
324(147)
388(176)
111"(2820)
78"(1981)
78"(1981)
78"(1981)
10 ⅝"(270)
102 ½"(2604)
67"(1702)
76"(1930)
114 ½"(2908)
10 ⅝"(270)
10 ⅝"(270)
10 ⅝"(270)
Catalogue Number
59 ½"(1511)
66 ½"(1689)
54"(1370)
3" or 8 ¼"(76 or 210)
69"(1750)
3" or 8 ¼"(76 or 210)
48"(1220)
48"(1220)
3" or 8 ¼"(76 or 210)
54"(1370)
3" or 8 ¼"(76 or 210)
32 ⅛"(816)
37 ¾"(959)
10 ⅝"(270)
10 ⅝"(270)
45 ¾"(1162)
10 ⅝"(270)
84"(2134)
87"(2210)
8 ¼"(210)
99"(2510)
125 ½"(3188)
143 ½"(3645)
80 ½"(2045)
101 ½"(2578)
113 ½"(2883)
118 ½"(3010)
130 ½"(3315)
148 ½"(3772)
145 650
170 750
245 900
48,3 25071 ½"(1816)
39 ⅞"(1013)
10 ⅝"(270)
38 20064 ½"(1638)
34 ¼"(870)
10 ⅝"(270)
78"(1981)
10 ⅝"(270)
99"(2510)
8 ¼"(210)
1024(465)
69"(1750)
3" or 8 ¼"(76 or 210)
464(211)
123 550106 ½"(2705)
69"(1753)
10 ⅝"(270)
87"(2210)
8 ¼"(210)
931(423)
72,5 35085 ½"(2172)
47 ⅞"(1216)
10 ⅝"(270)
10 ⅝"(270)
10 ⅝"(270)
8 ¼"(210)
104 ½"(2654)
10 ⅝"(270)
78"(1981)
12"(305)
1404(638)
86"(2184)
10 ⅝"(270)
111"(2820)
8 ¼"(210)
1090(495)
12"(305)
1731(787)
362 1300196 ½"(4991)
130 ½"(3315)
10 ⅝"(270)
78"(1981)
12"(305)
1955(889)
1050172 ½"(4382)
116 ½"(2959)
10 ⅝"(270)
78"(1981)
167 ½"(4255)
191 ½"(4864)
245
128 ½"(3264)
3067(1394)
3067(1394)
500 1550
12"(305)
12"(305)
78"(1981)
78"(1981)
10 ⅝"(270)
10 ⅝"(270)
291 ¼"(7398)
291 ¼"(7398)
150 ½"(3821)
150 ½"(3821)
MindCore Technologies
1845 Jean-Monnet
Terrebonne (Quebec) J6X 4L7
Canada
Tel: +1 450.477.5959
Fax: +1 450.477.2220
www.mindcoretech.com
TEChNICAL DRAWINg
SPECIFICATIONS
ANSI C37 / IEEE 693/ IEC 62271