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  6. Transformer for Busbar (Current Transformer CT) "KBM-□□" Suitable for Air-insulated Circuit Breakers

Transformer for Busbar (Current Transformer CT) "KBM-□□" Suitable for Air-insulated Circuit Breakers

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KBM-□□

last updated:Aug 12, 2025

光星計測器(LIGHTSTAR) LIGHTSTAR JAPAN 日本法人事務所(大阪)
光星計測器(LIGHTSTAR) LIGHTSTAR JAPAN 日本法人事務所(大阪)
  • Official site

Any type of circuit breaker for ugly bars can be matched. It is a product with good performance and price. Instruments for distribution boards, control panels, distribution panels, and panels.

KBM is our busbar-type CT, particularly suitable for air circuit breakers (ACB). The range of primary current is very broad, from 100 to 12,000, allowing for versatile use. The KBM series has diversified the size of the CT to match the size of the circuit breaker. It offers more varieties than busbar CTs for circuit breakers, making it a versatile product that can be used in various situations. By installing three units, it can also function like a three-phase CT. For the KBM-03 and KBM-25 models, production will continue until this year, and it is scheduled to be discontinued next year. However, new products KBM-13 and KBM-16 have been released, so the total number of varieties remains at nine. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

    Substation equipmentPower distribution and control panelsOther measuring instruments
KBM

Transformer for Busbar (Current Transformer CT) "KBM-□□" Suitable for Air-insulated Circuit Breakers

KBM 2탄.jpg
KBM 2탄.jpg
  • Related Link - http://www.lightstar.co.jp/product/list&paging=2&s…

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basic information

This is a product designed for air circuit breakers (ACB). Common specifications: Secondary current: 5A or 1A Overcurrent strength: 40 times Maximum voltage: 1.15kV Withstand voltage: 4.0kV for 1 minute Frequency: 50/60Hz

Price information

KBM-05: 2,700 yen KBM-08: 3,000 yen KBM-10: 3,750 yen KBM-12: 6,750 yen KBM-13: 7,200 yen KBM-14: 8,250 yen KBM-16: 9,000 yen KBM-18: 13,500 yen KBM-21: 15,000 yen, 22,500 yen *KBM-25 and KBM-03 will be discontinued from next year.

Price range

P1

Delivery Time

P3

※There is an agency in Yokohama, Japan, that has stock available.

Applications/Examples of results

This is a current transformer for busbars. It is a product designed to match air circuit breakers (ACB).

Detailed information

  • KBM

    This is the specification of the KBM series. You can see the range of primary current based on the model name.

  • KBM

    This is a picture of when it was attached to the busbar circuit breaker. Please use it as a reference.

Line up(8)

Model number overview
KBM-05 Operating current 200~300A(5VA) 400~700A(15VA) 750~2000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-08 Operating current 100~200A(5VA) 250~400A(15VA) 500~2000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-12 Operating current 300~400A(5VA) 500~750A(15VA) 800~3000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-14 Operating current 400~500A(15VA) 600~6000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-18 Operating current 500~800A(15VA) 1000~8000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-21 Operating current 500~800A(15VA) 1000~12000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-13 Operating current 1500~6000A(40VA) Class 1.0 Frequency 50/60Hz
KBM-16 Operating current 2000~7500A(40VA) Class 1.0 Frequency 50/60Hz

catalog(1)

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Corner window through-type transformer (air-insulated circuit breaker custom-made) 'KBM-□□'

Corner window through-type transformer (air-insulated circuit breaker custom-made) 'KBM-□□'

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Company information

光星計測器(LIGHTSTAR)

光星計測器(LIGHTSTAR) LIGHTSTAR JAPAN 日本法人事務所(大阪)

Electrical equipment construction business

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Our company was founded in 1979 and has grown into a manufacturer of products that can observe electrical data through early analog instruments, digital meters, wireless, and the internet. This development is driven by the strong will of our employees to walk alongside our customers. Additionally, we are committed to thorough customer-centric operations while actively investing in technological development at our affiliated research institute. We strive to meet our customers' diverse needs through more differentiated services. In our case, we have become well-known in South Korea for our measuring instruments (analog, digital meters, and CT, VT). We have been exporting to Japanese companies for over a decade, and we have registered with Ipros to introduce our products to more Japanese customers. In 2022, we registered as a corporation in Tokyo and have since relocated our corporate office to Osaka as "LIGHTSTAR JAPAN." We also have Japanese staff on-site, and we look forward to your support.

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