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BTB MA3 Series User Manual

Air circuit breakers
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AIR CIRCUIT BREAKERS

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Summary of Contents for BTB MA3 Series

  • Page 1 User manual for AIR CIRCUIT BREAKERS...

  • Page 2: Table Of Contents

    • Standard: IEC/EN 60947-2 1. Application The MA3 series air circuit breaker (ACB), referred to as ACB hereafter, is designed for distribution systems to distribute power and protect circuits and power supply devices against faults such as overloads, under-voltage, short circuits, and single-phase grounding damage. The ACB off ers multiple protective functions and high selection protection, enhancing the reliability of power supply.

  • Page 3: Type

    2. Type 5. Intelligent trip unit 1. Series 9. Closing electromagnet Relay M type Manual type Air Circuit Breakers Relay H type / Design number 110 VAC Relay 3M type 220 VAC Relay 3H type 2. Rated current 400 VAC 110 VDC 630A 6.

  • Page 4: Main Technical Parameter

    3. Main technical parameter Frame 2000 4000 6300 630, 800 4000 2500 Rated current, In (A) 1000,1250 4000 5000 3200 1600,2000 6300* Rated Operational Voltage, Ue AC 415V/690V Rated Insulation Voltage, Ui 1000V Rated Impulse Withstand Voltage, Uimp 12kV Rated Frequency (Hz) 50/60Hz No.

  • Page 5: Structure Of Acb

    4. Structure of ACB ACB: draw-out and fi xed type. The draw-out type is mounted on the base, while the fi xed type is mounted in the frame. in the frame.

  • Page 8: Use Of Acb

    5. Use of ACB ACB energy storage The ACB employs energy storage for the operation mechanism spring before closing. There are two methods: manual energy storage and motor energy storage. • Manual energy storage Repeatedly press the handle 6-7 times until a “click” is heard. At that point, the mechanism transitions from release to storing energy, indicating the completion of energy storage.
  • Page 9 ACB closing • ON button (I): Press the ON button (I), the mechanism status changes from “store” to “discharged”, and the status indicator changes from “O” to “I”, then close. • Closing Electromagnet: For ACBs equipped with a closing electromagnet, pressing the electric closing button can close the ACB.
  • Page 10 ACB open • OFF Button: Press the OFF button (O), the status indicator changes from “I” to “O”, then open. • Shunt Release: For ACBs equipped with a shunt trip release, pressing the electric opening button can open the ACB. Operable power supply range for shunt trip release: (70%~110%) Us.
  • Page 11 Identify ACB position The draw-out base for frame position typically includes three position indicators. • main circuits open • arc insulation board close • secondary circuits open • main circuits open • arc insulation board close • secondary circuits open •...
  • Page 12 Draw-out body ACB body from “connection” to “open” position, then draw out rail and take out ACB body by hands. Steps: Handle insert into rocking hole Press three positions unlock button Counterclockwise turn handle “connection” position “open” position Pull out the body: 1.
  • Page 13 Insert into ACB body ACB body put into rail for ensure body on the sides of support in the rail groove. Securely hold the ACB cover with your hands, then push the body into the base until it stops moving. Remarks: 1.
  • Page 14 Store Store the ACB in a dust-free and dry environment with temperatures ranging from -25°C to +55°C and a relative humidity of less than 95%. Ensure that the ACB is in the OFF state and discharged before sealing it. Avoid storing it in high humidity or salt spray environments to prevent corrosion of metals and conductive parts.
  • Page 15 Common tackle the fault solutions Fault Probable causes Solutions Ensure under-voltage release Under-voltage release not engaging engages properly by checking if voltage exceeds 85% Ue Test circuits after a fault to trip. Press Fault button not resetting the fault reset button after resolving the fault Cannot be closed...

  • Page 16: Mounting Ambinent

    Cannot press Body is in “connections” or “test” Gently sway the handle and press the the unlock position button to unlock if it’s stuck Test circuits according to the controller Fault in main circuits menu after a fault Trip Test circuits to ensure main circuits Under-voltage release activated voltage exceeds 85% Ue for the under-voltage release...

  • Page 17: Electrical Diagram

    7. Electrical diagram M type connections...
  • Page 18 1,2: 27,28: Under-voltage release Auxiliary power supply incoming for smart controller. 29,30: Shunt release auxiliary power supply is DC, 31,32: Closing electromagnet which add the power module 33,34,35: Motor operation 3,4,5: Signal contacts for release mechanism, 34 for common fault to trip indicating, 4 for terminal common terminal UVT, SHT, CC, MD: Under-voltage...
  • Page 19 H type connections...
  • Page 20 1,2: Auxiliary power supply 27,28: Under-voltage release or incoming for smart controller. no-voltage release auxiliary power supply is DC, 29,30: Shunt release which add the power module 31,32: Close electromagnet 3,4,5: Signal contacts for release 33,34,35: Motor operation fault to trip indicating, 4 for mechanism (34 for common common terminal terminal)

  • Page 21: Overall & Mounting Dimensions

    8. Overall & mounting dimensions ACB Fixed type - Frame 2000A 3P/4P (630A ~ 2000A) In(A) a(mm) 630 - 800 1000 - 1600 2000 ACB Drawout type - Frame 2000A 3P/4P (630A ~ 2000A) In(A) a(mm) 630 - 800 1000 - 1600 2000...
  • Page 22 ACB Fixed type - Frame 4000A 3P/4P (2500A, 3200A) In(A) a(mm) 2000, 2500 3200 ACB Drawout type - Frame 4000A 3P/4P (2500A, 3200A) In(A) a(mm) 2000, 2500 3200...
  • Page 23 ACB Fixed type - Frame 4000A 3P/4P (4000A) In(A) a(mm) 2500 - 4000 ACB Drawout type - Frame 4000A 3P/4P (4000A) In(A) a(mm) 2000, 2500 3200, 4000...
  • Page 24 ACB Fixed type - Frame 6300A (4000A, 5000A/3P) Center line of door frame Reference Point 6300/4000A, 5000A/3P In(A) a(mm) 4000 5000 ACB Fixed type - Frame 6300A (4000A, 5000A/4P, 6300A/3P) 6300/6300/3P In(A) a(mm) 4000 5000, 6300 6300/4000A, 5000A/4P...
  • Page 25 ACB Drawout type - Frame 6300A 3P (4000A, 5000A/3P) In(A) a(mm) 4000 5000 6300/4000, 5000/3P ACB Drawout type - Frame 6300A 3P (4000A, 5000A/4P, 6300A/3P) In(A) a(mm) 4000 5000 6300/6300/3P 6300/4000A, 5000A/4P...

  • Page 26: Intelligent Trip Unit

    9. Intelligent trip unit Explanation of 3M/3H type 1. Fault to trip & reset 2. Rated current for name-plate 3. CD indicating interface 4. Fault/alarm resetting button 5. Fault/alarm LED indicating (LED without light while normal working.LED with continuous blinking quickly while fault to trip.
  • Page 27 Explanation of M/H type 1. Fault to trip & reset 2. Rated current for name-plate 3. In sequence of fault & alarm indicating 4. In sequence of communication emission & receiver indicating (for H type) 5. In sequence of N phase, A phase,B phase, C phase voltage indicating (for H type) 6.
  • Page 28 Setting and Protective Characteristics Over-load long delay protection M/H type & 3M/3H type (0.4 ~1.0 or 1.25) In or OFF (OFF-function close) Current setting IR Notes: Distribution protection is 1.0ln; Generator protection is 1.25ln SI: Normal inverse time t=0.01396 Tr/ (NO.02-1) VI: Fast inverse time t=Tr/ (N−1) El (G): Express inverse time (use of general distribution protection) t=3 Tr/ (N...
  • Page 29 Short-circuit short delay protection M/H type & 3M/3H type Current setting Isd (1.5~15) Ir or OFF (OFF-functions close) Time setting M/H type: 0.1 ~ 1.0 Tsd1 inverse time Tsd (s) 3M/3H type: 0.1, 0.2, 0.3, 0.4 (selection: 0.1~1.0) Tsd2 definite time Current (I/Isd) Trip time ≤0.9...
  • Page 30 Settings for 3M/3H type 1. Default interface • The controller displays the default interface when powered on. • Under each subject menu, pressingor the Under each subject menu, pressingor the 1 5 0 corresponding subject key returns to the default interface. 1 0 0 •...
  • Page 31 Current P Load Moni 4. “Protection parameter set” menu Voltage P • Press to return to default interface Other P • In other non-fault interface, press to jump to the protection parameter set menu Exist Operat .C 5. “History and maintenance” menu Contact •...
  • Page 32 Settings for M/H type MENU ITEM SETTING FUNCTION Setting current 0.2 ~ 1.0 In or OFF Load monitor 1 Time setting (s) 15, 30, 50, 100 … 480 Setting current 0.2 ~ 1.0 In or OFF Load monitor 2 Time setting (s) 15, 30, 50, 100 …...

  • Page 33: Troubleshooting

    10. Troubleshooting Fault Cause analysis Exclusion scheme Remarks phenomenon Check whether the data The external power The voltage label on the circuit breaker supply must meet specification is conforms to the ordering the requirements, inconsistent with the requirements, otherwise, it and the wiring must circuit breaker will be replaced...
  • Page 35 Designed by BTB Electric Add: Orhangazi Mah. Mimsan San. Sit. 1780 sok. No: 5 Esenyurt / İstanbul / Türkiye 01 I 2025 E-mail: sales@btb-electric.com Web: btb-electric.com F O R L I F E ELECTRIC...

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