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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV

Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV
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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 1

Eco Changes is the Mitsubishi Electric Group's environmental statement, and expresses the Group's stance on environmental management. Through a wide range of businesses, we are helping contribute to the realization of a sustainable society. Safety Warning To ensure proper use of the products listed in this catalog, please be sure to read the instruction manual prior to use. MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN G-199-2-C8932-A HQ1203 Printed in Japan (MDOC) Specifications are subject to change without notice. MITSUBISHI Changes for the Better VACUUM CIRCUIT BREAKER (RETROFIT) Retrofit VCBs for Replacement of Existing MBBs

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 2

We recommend to replace the existing Magnetic Blast Breakers with new Vacuum Circuit Breakers in order to ensure the safe and reliable operation of your switchgear. Manufacturing of MBBs halted in 1985 and their replacement parts have been supplied since 1985 for around 20 years. Replacement of MBBs with new VCB (Retrofit VCB) is recommended since supply of MBB parts was discontinued at the end of 2005. Retrofit VCBs will improve reliability and increase economical efficiency. Increase in the number of accidents Retrofit VCBs to be used. Improvement in reliability of power supply Increase...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 3

The MV Retrofit VCB complies with the international standard IEC 60056. High reliability Retrofit VCB Type MV-S Motorised stored energy spring mechanism Closing operation mechanism Rated voltage Rated current Rated frequency Rated short-circuit breaking current Rated short-circuit making current Rated short-time withstand current The highly reliable BH-2 operating mechanism is incorporated in the Retrofit VCB. , This operating mechanism is used in Mitsubishi s latest VCBs. Breaking capacity Saving maintenance time Rated opening time Rated breaking time Power frequency withstand voltage 15...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 4

High Reliability & Saving Maintenance Time Maintenance free Maintenance free for 15 years or more. (Maintenance interval may be changed depending on enviorment condition) Mitsubishi Grease is fluoride-based. There was no evidence of oxidation during tests on Mitsubishi grease. It has also been confirmed that there is no increase in friction after these tests were completed. The coefficient of friction remains small and regular under both low and high temperature conditions unlike other types of grease. Coefficient of friction under low and high temperatures Oxidation stability test Improved...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 5

Ready Interchangeability with the MBB Operating & Control Current of CB Reduction in power consumption compared with the MBB (Surge current) steady-state (Current) Waveform of motor charging current Waveform of closing and tripping control current (100V DC) Retrofit VCB MBB Motor spring operated Operating & control current/ Closing and tripping time Motor charging Time Time NOTE : Other than 100V DC control source are available. Operating current and time of closing / tripping and motor control at 100V DC Control Voltage (V) Rated breaking current Rated voltage Item Series NOTE : The...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 6

tjj Procedure of modifying from MBB to Retrofit VCB Example from MBB type 3-DHE-25 to Retrofit VCB type 3MV40DHE-325 The contents of modification may be changed depending on the specification of MBB. Primary junction overlap check 5 Install control equipments 3 Remove control equipment Main contents of modification Q Remove closing switch Q Install control panel for closing H Remove control equipment H Install control equipment (In case of panel width 660mm) Q Install wheel stopper . is lower than that of the MBB Q Install wheel stopper Working time for the each steps NOTE : Items and time...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 7

Wiring Modification of Switchgear Panel Life of whole circuit breaker Small current (less than 100 A) breaking Electrical life Tripping circuit Closing circuit Closing circuit Motor circuit Tripping circuit Load current breaking Mechanical life Short circuit breaking NOTE : The above switching number of time is the actual capacity checked in the short-term continuous switching test, and does not guarantee the life for a long period of time. Perform the maintenance and inspection according to the standard of the inspection manual to keep the service life. CB Comparison of Scheduled...

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Retrofit Vacuum Circuit Breakers for Replacement of Existing MBB Type MV - 8

Applicable Standards Special Environment and Application A Operation Environment Front panel Vacuum Switch Tube Primary Junction Manual charging handle aperture B Manual Close button Manual Trip button Closing spring charge display Normal operation condition 1. Altitude: 1,000m or less 2. Ambient temp: –5°C~40°C (The average temperature for 24 hours must not exceed 35°C.) (Relative humidity; there must be no dew condensation.) 4. Degree of pollution: There must be no pollution. (As a guideline, the equivalent salt deposit density should be less than 0.01 mg/cm2) Instructions for...

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