ThinkPark Tower, 2-1-1, Osaki, Shinagawa-ku, Tokyo, 141-6029 Japan
China
DONGGUAN MEIDEN PACIFIC ELECTRICAL ENGINEERING CO., LTD.
No.1 Side Street 1 of DongFu Commercial Street, MoWu, WanJiang District,
Dongguan City, GuangDong Province, P.C.523041 P.R.China
Phone: 86-769-22285210 Facsimile: 86-769-22285250
MEIDEN ZHENGZHOU ELECTRIC CO., LTD.
No.87 Hehuan Street, Zhengzhou Hi-Tech Industries Development Zone,
Zhengzhou, Henan Province, P.C.450001, P.R.China
Phone: 86-371-67848800 Facsimile: 86-371-67848797
MEIDEN SHANGHAI CO., LTD.
Room 1806, Plaza 336, No. 336 Xizang Road (Middle)
Huangpu-District,Shanghai, 200001, P.R. China
Phone: 86-21-63860358 Facsimile: 86-21-63860058
MEIDEN HANGZHOU DRIVE SYSTEMS CO., LTD.
No.168, Hongxing Road, Qiaonan District,
Xiaoshan Economic & Technological Development Zone,
Hangzhou, Zhejiang, P.C. 311231, P.R.China
Phone: 86-571-8369-6808 Facsimile: 86-571-8369-6818
SHANGHAI MEIDENSHA CHANGCHENG SWITCHGEAR CO., LTD.
No.885, Xingrong RD Industrial Zone, Jiading, Shanghai 201821, China
Phone: 86-21-6916-9911 Facsimile: 86-21-6916-9922
Hong Kong
MEIDEN PACIFIC (CHINA) LTD.
Unit 01-02A, 16/F, Tower 1, Ever Gain Plaza,
88 Container Port Road, Kwai Chung, N.T., Hong Kong
Phone: 852-2503-2468 Facsimile: 852-2887-8046
India
MEIDEN INDIA PVT. LTD.
910, International Trade Tower, Nehru Place, New Delhi-110019, India
Phone: 91-11-46539381 Facsimile: 91-11-46539385
Indonesia
P.T. MEIDEN ENGINEERING INDONESIA
20th Floor, Summitmas l, JI. Jenderal Sudirman Kaveling 61-62
P.O.BOX 6920/KBY/Summitmas l Jakarta Selatan 12190, Indonesia
Phone: 62-21-520-0612 Facsimile: 62-21-520-0240
Korea
MEIDEN KOREA CO., LTD.
Royal Building No. 410, 5 Dangju-Dong, Chongro-ku, Seoul, Korea
Phone: 82-2-736-0232 〜 3 Facsimile: 82-2-736-0234
Overseas Offices & Group Companies
Malaysia
MEIDEN MALAYSIA SDN. BHD.
Unit A-13-13A, Level 13, Menara UOA Bangsar 5,
Jalan Bangsar Utama 1, 59000 Kuala Lumpur, Malaysia
Phone: 60-3-22878188 Facsimile: 60-3-22879188
MEIDEN METAL ENGINEERING SDN. BHD.
Lot 6, Peringkat 3, Kawasan Perindustrain Alor Gajah, 78000 Melaka, Malaysia
Phone: 60-6-556-8790 Facsimile: 60-6-556-8795
Singapore
MEIDEN ASIA PTE. LTD.
5, Jalan Pesawat, Jurong Industrial Estate, Singapore 619363
Phone: 65-6268-8222 Facsimile: 65-6264-4292
MEIDEN SINGAPORE PTE. LTD.
5, Jalan Pesawat, Jurong Industrial Estate, Singapore 619363
Phone: 65-6268-8222 Facsimile: 65-6264-4292
Thailand
THAI MEIDENSHA CO., LTD.
15th Floor, Rasa Tower Ⅱ , 555 Phaholyothin Road, Chatuchak,
Chatuchak, Bangkok 10900, Thailand
Phone: 66-2792-4200 Facsimile: 66-2792-4299
MEIDEN ELECTRIC (THAILAND) LTD.
898 Moo 2, Bangpa-in Industrial Estate, Udomsorayuth Rd.,
Klongjig, Bangpa-in, Ayudhaya 13160, Thailand
Phone: 66-35-258258 〜 262 Facsimile: 66-35-221388
United Arab Emirates
MEIDENSHA CORPORATION DUBAI BRANCH
Dubai Airport Free Zone, 6WA Room No.606, P.O.Box 54919, Dibai, U.A.E
Phone: 971-4-2146-692 Facsimile: 971-4-2146-699
The United Kingdom
MEIDEN EUROPE LTD.
NYK Complex, Bradbourne Drive, Tilbrook, Milton Keynes MK7 8BN,
England, U.K.
Phone: 44-1908-276000 Facsimile: 44-1908-276010
The United States
MEIDEN AMERICA, INC.
15800 Centennial Drive, Northville Township, MI 48168, U.S.A.
Phone: 1-734-656-1400 Facsimile: 1-734-459-1863
MEIDEN TECHNICAL CENTER NORTH AMERICA LLC
15800 Centennial Drive, Northville Township, MI 48168, U.S.A.
Phone: 1-734-656-1400 Facsimile: 1-734-459-1863
Specifications in this catalog are subject to change without notice.
GB46-3201 As of Jul., 2012
2012-7ME 0.5
L
Contact: Roman Porenta -Meiden Representative - Vacuum Interrupters - Email: rporenta@omnicor.com Phone : +1(650) 572 0122 Ext. 111 www.omnicor.com

1 VACUUM INTERRUPTERS
Contact: Roman Porenta -Meiden Representative - Vacuum Interrupters - Email: rporenta@omnicor.com Phone : +1(650) 572 0122 Ext. 111 www.omnicor.com
Features
1. Simplified arc quenching method
The spiral contact assures a high arc driving efficiency.
2. Simplified construction and high quality
Since complete degassing and hermetical seal are processed in a vacuum furnace, vacuum degree can be maintained for a long time.
3. No evacuation tube
Since manufacturing of vacuum interrupters using ceramics envelopes is done in a vacuum furnace, no evacuation tube is necessary.
4. Slim body
Since new contact materials are developed, external dimensions are reduced.
Major Applications
· Vacuum circuit-breakers
· Vacuum switches
· Vacuum contactors
· Transformer tap changers
· Rail line circuit-breakers
· Autoreclosers
· Special duties,
e.g. for multi-operation section switches
VACUUM INTERRUPTERS 2

＊ Vacuum Interrupters for Medium Voltage Class
IEC & ANSI Standard
Contact: Roman Porenta -Meiden Representative - Vacuum Interrupters - Email: rporenta@omnicor.com Phone : +1(650) 572 0122 Ext. 111 www.omnicor.com
GB Standard
＊
Vacuum Interrupters-Structure, Feature & Performance
Vacuum Interrupters have simple to its structure. Material of copper is used for VI
, s flanges. Therefore Vacuum Interrupters have exellent on heat dissipation at load current and short circuitbreaking current.
1. Conducting rod
2. Flange
3. Shield
4 . Contact and Electrode
1 2 3 4 5 6 7 8
5. Ceramics envelope
6. Bellows shield
7. Bellows
8. Twist protection guide
MEIDEN is manufacturing the medium voltage class
VIs which matches to the various specifications in the world.
＊ Vacuum Interrupters for High Voltage Class
MEIDEN developed and commercialized 72.5kV class vacuum interrupter for the first time in the world.
MEIDEN has successfully developed a 145kV/40kA rating and turn into production.
＊ Vacuum Interrupters for Customized Arrangement
MEIDEN corresponds to size arrangement and review the specifications of VIs based on requirement.
Production of prottype VIs as well as test of short circuit breaking test, etc are possible.
If customer would like to have new R&D and changing for now purches VI,
MEIDEN will be possible to test at our own test laboratory for customize arrengement.
＊ Vacuum Interrupters- Manufacturing & Quality & Assurance
All the Vacuum Interrupters assembly works are carried out in a clean room.
Each part is chemically cleaned, washed, dried, and then carried to the clean room. Vacuum Interrupter using ceramics envelopes has high heat-resisting characteristics.
Utilizing this advantage, degassing and hermetically sealing procsses are simultaneously carried out in a vacuum furnace.
This simplified manufacturing process makes Vacuum Interrupters quality stable. After brazing under vacuum, each Vacuum Interrupter is to be given a constant mechanical load and then inspected its dimensional variations.
All data are automatically recorded under hgih quality control. Data recording and pass-fail judgment are automatically carried out.
Inspection of materials supplied and process control at all stage and final inspection of vacuum degree of each vacuum interrupter ensure for quality assurance and a long service life.
MEIDEN applies a delivery criterion of ultra-high vacuum less than
5 × 10 -4 [Pa], thus a service life of VI is 20 years.
3 VACUUM INTERRUPTERS
Automatically forming equipment
MEIDEN produces two types of electrode (Spiral & Axial Magnetic
Field) and its material is pressed powder of Cr-Cu alloy.
Uniform-dispersion
Cr material within Cu
VI contacts are soft and have excellent current-breaking performance, because of their uniform-dispersion materials.
Therefore, it enable to minimize the operating energy for circuit breakers, and it helps much compact size operating mechanism.
1000
Spiral electrode
(Soft material)
AMF electrode
(Hard material)
Spiral electrode is normally applied for economic and standard
VCB/Swichgear of midium voltage class.
MEIDEN manufactures soft electrode by using forming equipment for powder material.
AMF electrode is applied for high voltage class and capacitor bank. The electrode is hard and have excellent high voltage performance.
MEIDEN is manufacturing high voltage VCB upto rated 168kV class, and Switchgear at rated 72.5kV class.
These VCB and Switchgear are using hard material on the vacuum interrupter, its electrode is this hard material.
100
10
Soft electrode
Hard electrode
12.5
25
Breaking current [kArms]
50
Minimized contact pressure
VACUUM INTERRUPTERS 4

5 VACUUM INTERRUPTERS
Contact: Roman Porenta -Meiden Representative - Vacuum Interrupters - Email: rporenta@omnicor.com Phone : +1(650) 572 0122 Ext. 111 www.omnicor.com
Rated
Voltage
Rated lightning   impulse voltage
Power frequency withstand
Voltage
Rated
Current
Short circuit breaking current with at least 30-40% DC component and
Interrupter (Outdiameter-Style) kV
7.2
kV
60 kV
20
A
630
12.5kA
M20QC
( φ 52-A)
16kA 20kA 25kA 31.5kA
12/15
17.5/24
75
95/125
28
38/50
800/1250
1600/2000
2500/3150
630
800/1250
1600/2000
2500/3150
630
800/1250
1600/2000
2500
M52QC
( φ 65-B)
M52QC
( φ 65-B)
*
M72RC
( φ 75-B)
*
40kA 50kA
M30RC
( φ 94-A)
M40SC
( φ 94-A)
M50TC
( φ 110-A)
M41QC
( φ 69-B)
MA61RC **
( φ 94-B)
M51RC
( φ 82-B)
M71SC
( φ 94-B)
M81SC
( φ 110-B)
M82RC
( φ 75-B)
*
MA102RC **
( φ 94-B)
M102RC
( φ 94-B)
M102SC
( φ 94-B)
M71TC
( φ 110-B)
M81TC
( φ 132-B)
MA131TC
( φ 150-B)
M132TC
( φ 120-B)
M203TC
( φ 120-C)
36/38 175 80 630 M83QC
( φ 75-B)
*
800/1250
M93QC
( φ 94-B)
*
M123QC
( φ 94-B)
*
52
72.5
250
325
1600/2000
2500
90 1250/2000
140 1250/2000
M163SC
( φ 110-B)
*
MA317SC
( φ 132-B)
M203TCB
( φ 120-C)
*
MA285SC
( φ 132-B)
*
MA467SC
( φ 150-B)
M253TC
( φ 132-C)
*
MA507SC
( φ 150-B)
* : Additional external insulation necessary
** : Capacitor bank switching
Rated
Voltage
Rated lightning impulse voltage
Power frequency withstand
Voltage
Rated
Current
Short circuit making current
VI Type
(Dia.-Style) kV
12/15.5
kV
95 kV
35
A
630 kApeak
40 M01QC
( φ 60-A)
24/27 125 60 630 40 M02QC
( φ 65-B)
36/38 150 70 630 40 M03QC
( φ 65-B)
Rated
Voltage
Rated lightning impulse voltage
Power frequency withstand
Voltage
Rated
Current
Short circuit breaking current
VI Type
(Dia.-Style) kV
15.5/27 kV
110/125 kV
50/60
A
630 kA
12.5
Rated
Voltage
Rated
Voltage
Rated lightning impulse voltage
Power frequency withstand
Voltage
Rated
Current
Short circuit breaking current
Short circuit making current
＊
15.5/27
38
38 kV
6.6
6.6
kV
18/36
110/125
Rated lightning impulse voltage
150
150 kV
45
45 kV
170
Power frequency withstand
Voltage
50/60
70
70 kV
16
16 kV
70(16.6Hz)
70(50/60Hz)
Rated
Current
800
630
800
A
400
400
A
750(16.6Hz)
450(50/60Hz)
Interrupter types and diameters are shown in the tables.
Style A Style B Style C
Short circuit breaking current
16
12.5
16 kA
4
6 kA at 18kV
→ 25(16.6Hz) at 36kV
→ 20(50/60Hz)
1,000,000
100,000
10,000
1,000
100
10
1
0.1
M52QC
( φ 65-B)
M72QC
( φ 75-B)
*
*
*
M83QC
( φ 75-B)
MA93QC
( φ 82-B)
*
VI Type
(Dia.-Style)
5G-1
( φ 52-A)
7.5G
( φ 52-A) kA at 18kA
→ 62.5(16.6Hz)
VI Type
(Dia.-Style)
163SCM
( φ 132-C)
1 10
Breaking current [kA (r.m.s)] →
ELECTRICAL LIFE
(12/15kV Class Vacuum Interrupter)
100
VACUUM INTERRUPTERS 6