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KRB-5200h

Air Circuit Breakers

AME Series

Instruction Manual

Applicable Breaker Types:

AME3B
AME4B
AME6B
AME8B

AME10B

Please retain this manual for future reference.

Содержание AME Series

Страница 1: ...KRB 5200h Air Circuit Breakers AME Series Instruction Manual Applicable Breaker Types AME3B AME4B AME6B AME8B AME10B Please retain this manual for future reference ...

Страница 2: ...KRB 5200h ...

Страница 3: ...is manual safety notices are divided into Warning and Caution according to the hazard level Warning A warning notice with this symbol indicates that neglecting the suggested procedure or practice could be fatal or result in serious personal injury Caution A caution notice with this symbol indicates that neglecting the suggested procedure or practice could result in moderate or slight personal inju...

Страница 4: ...umidity dusty air corrosive gas strong vibration and shock or other unusual conditions Mounting in such areas could cause a fire non tripping or malfunction Be careful to prevent foreign objects debris concrete powder iron powder etc and rainwater from entering the ACB These materials inside the ACB could cause a fire or non tripping Use both hands to support the ACB when mounting or dismounting i...

Страница 5: ...ration 17 4 3 1 Motorized Operator 17 4 3 2 Manual Operation 19 5 OVERCURRENT TRIP DEVICE 20 5 1 Setting Change 20 5 2 OCR Field Tests 21 5 2 1 Tests with Current Applied to the Main Circuit 21 5 2 2 Tests with Current Applied to the OCR Test Terminal 23 5 2 3 Tests Using OCR Checker type ANS1 25 5 3 Operation Characteristic Curves 26 6 PRECAUTIONS ON TEMPERATURE RISE TEST 27 7 PRECAUTIONS ON INSU...

Страница 6: ......

Страница 7: ...uit terminals for auxiliary alarm switch Seal for OCR cover mounting screw OCR nameplate Accessory motor operator nameplate Breaker nameplate Trip button Control circuit terminals Main circuit terminals Manual operating handle Auxiliary circuit terminals for auxiliary alarm switch Indicator Lock plate Motor operated AME4B rear connected type Direct operated AME6B rear connected type ...

Страница 8: ...tation Precautions 1 Use both hands to transport the ACB A heavy ACB should be carried by two persons Dropping or toppling the ACB may cause damage to it or personal injury ACB Mass kg ACB type Manual operated Motor operated Rear connected Plug in Rear connected Plug in AME3B AME4B 6 5 5 11 2 9 7 AME6B 10 9 6 15 6 15 2 AME8B AME10B 19 5 16 25 9 22 4 2 Do not carry the ACB by the auxiliary terminal...

Страница 9: ...0h 3 3 Place the ACB on a flat level surface in its normal standing position Do not turn the ACB sideways 4 Do not place the ACB directly on the floor 5 Do not expose the ACB to direct sunlight for a long time ...

Страница 10: ...re adequate arc space insulation distance Blocking the arc gas vents could prevent the ACB from tripping 6 Do not place the ACB in such an area that is subject to high temperature high humidity dusty air corrosive gas strong vibration and shock or other unusual conditions Mounting in such areas could cause a fire non tripping or malfunction 7 Be careful to prevent foreign objects debris concrete p...

Страница 11: ...n of the switchboard could result in false tripping of the ACB 3 Do not place the ACB in such an area that is subject to direct sunlight 4 Clean the connecting surface It is recommended that the connecting surface of the connecting conductors be subject to silver plating or the like in order to reduce the contact resistance on the surface 5 When applying the frame current continuously use the conn...

Страница 12: ...ME3B AME4B Hex nut M10 18 6 29 4 Pan head M3 5 0 88 1 18 AME6B Hex nut M16 51 5 84 3 AME8B AME10B Hex nut M12 40 2 65 7 4 Be sure to bring the connecting conductors into close contact with the plug in mounting base terminal Otherwise a fire could result 5 Avoid blocking the arc gas vents of the ACB to ensure adequate arc space insulation distance Blocking the vents could result in failure of ACB t...

Страница 13: ...gement 4 with alarm switch AME3B AME4B ON side ON side ON side ON side AXc1 AXa1 AXb1 AXc2 AXa2 AXb2 T1 T2 U1 U2 AXc1 AXa1 AXb1 ALc1 ALa1 ALb1 T1 T2 U1 U2 AXc1 AXa1 AXb1 AXc2 AXa2 AXb2 S1 S2 AXc1 AXa1 AXb1 ALc1 ALa1 ALb1 S1 S2 OFF side OFF side OFF side OFF side AME6B AME8B AME10B ON side ON side ON side ON side AXc1 AXa1 AXb1 AXc3 AXa3 AXb3 T1 T2 U1 U2 AXc1 AXa1 AXb1 ALc1 ALa1 ALb1 T1 T2 U1 U2 AX...

Страница 14: ...ize 150 mm 2 2 x 100 mm 2 2 x 50 x 5 2x 50 x 5 2x 60 x 5 At ambient temperature of 45 7 Ensure adequate insulation distance specified per your switchboard from bare live parts of terminals and connecting conductors to a mounting angle and bare live parts of other components 8 Secure the connecting conductors firmly using supporting means so that an electromagnetic force caused by a large current f...

Страница 15: ...ect the trip signal wire and power supply wire to the auxiliary circuit terminals as shown in Fig 4 For the rear connected ACB connect the wires to the specified terminals on the left side of the ACB For the plug in ACB connect the wires to the specified terminals on the rear side of the mounting base Fig 4 UVT Connection Diagram Caution The voltage between terminals T1 and T2 is 20 VDC and the op...

Страница 16: ...ide of the ACB For the plug in ACB connect the power supply wire to the specified terminal on the rear side of the mounting base Fig 5 SHT Connection Diagram Caution The SHT is rated for short time Although it contains a switch which connects to the SHT coil in serial and makes the coil unexcited continuous signals should not be given to the SHT Caution Be sure to replace the terminal cover transp...

Страница 17: ...ower supply wire to the specified terminal on the rear side of the mounting base 2 Contact ratings Caution The contact load must fall within the range from the minim load to the rated load Caution The ratings shown on the accessory nameplate are for the resistive inductive load For lamp or motor load see the following table The lamp load involves an inrush current of 10 times the rated load The in...

Страница 18: ...as shown in Fig 7 For removing the motor operator see the XMD Series Motor Operator Operating Instructions Fig 7 XMD4M hinged type 2 Ratings The following table shows the operating current at the maximum rated voltage The accessory nameplate indicates the steady state current For the operating switch ratings and power capacity refer to the starting current Operating Current Rated current at 50 60 ...

Страница 19: ...e ON operation 2 OFF operation To open the breaker set the operating handle to the OFF position Caution If the main contacts are damaged welded the ACB cannot open In this case the operating handle will return to the ON position when the handle is released at the OFF position Replace the ACB 3 Tripping operation When the overcurrent trip device OCR UVT or shunt trip device SHT is activated the ACB...

Страница 20: ...eration Handle operating force N Extension handle OFF ON ON OFF Tripped Reset AME3B AME4B Direct 86 2 68 6 92 1 Not supplied AME6B Direct 121 95 1 235 Supplied Extension handle used 76 4 59 8 149 AME8B Direct 157 118 343 Supplied AME10B Extension handle used 97 72 5 212 Pulling both the lock pins in the arrow directions will permit the extension handle to be installed The extension handle will be ...

Страница 21: ... close the ACB set the external operating handle to the ON I position Caution When the ACB is equipped with the undervoltage trip device UVT the UVT coil must be excited to permit the ON operation 2 OFF operation To open the breaker set the external operating handle to the OFF O position Caution If the main contacts are damaged welded the ACB cannot open In this case the external operating handle ...

Страница 22: ...e ACB can be reset but not closed Caution Before closing the switchboard door Set the external operating handle to the OFF O or TRIP position Close the door carefully while checking if the ACB handle is linked with the guide groove of the guide plate as shown in Fig 10 below Fig 10 Linkage of External Operating Handle and ACB Handle viewed from the right ACB Switchboard door External operating han...

Страница 23: ...ted open close operation should not exceed 10 times If repeated continuous open close operation is inevitable a pause of at least 15 minutes should be provided after the repetitions of 10 times Otherwise burnout could result The indicator permits you to check if the ACB is open ON or closed OFF Red shows ON green OFF and white TRIPPED Electrical check can also be done using the auxiliary switch fo...

Страница 24: ...reaker does not close within three seconds after OFF operation turn off the operating voltage Otherwise burnout could result Closing an external OFF switch not supplied will open the ACB within 3 seconds 3 Tripping operation When the overcurrent trip device OCR UVT or shunt trip device SHT is activated the ACB trips open and the indicator turns white automatically Pressing the trip button will lea...

Страница 25: ...is excited Caution Do not apply excessive force to the manual operating handle Doing so may cause damage to the handle Resetting the ACB after tripping however will require the sufficient operating force shown in the table below ACB type Handle operating force N ON OFF Reset AME3B AME4B 120 130 AME6B 90 170 AME8B AME10B 170 260 Caution When the manual operating handle is pull down while control vo...

Страница 26: ...erator Operating Instructions Combinations of Protective Functions LTD STD INST For operation characteristic curves see page 26 LTD STD STD INST Special spec Caution The combination LTD STD reduces the rated breaking capacity Use this combination for the circuits the rated breaking capacity of which is not more than the WITHOUT INST value indicated on the ACB nameplate 5 1 Setting Change Caution S...

Страница 27: ...y competent persons Never touch the live terminal parts Otherwise electric shock may result Before performing the tests Remove the XMD4M motor operator when it is mounted on the ACB The XMD4M motor operator is a hinged type For procedures for removing and mounting the operator see 3 Before and After Checking the Trip Settings XMD Series Motor Operator Operating Instructions Apply voltage between a...

Страница 28: ...ror of 1 in test current will lead to an error of 4 in time delay Apply the accurate test current to the OCR To check the time delay setting apply a test current of I1 x 1 2 and using a stopwatch measure the time from current application to ACB tripping Note that a gradual increase of the test current could cause erroneous results It is acceptable when the measured time falls within the range of 8...

Страница 29: ...Doing so will generate a high dangerous voltage between terminals Before performing the tests Remove the XMD4M motor operator when it is mounted on the ACB The XMD4M motor operator is a hinged type For procedures for removing and mounting the operator see 3 Before and After Checking the Trip Settings XMD Series Motor Operator Operating Instructions Apply voltage between auxiliary circuit terminals...

Страница 30: ...tep and using a stopwatch measure the time from current application to ACB tripping It is acceptable when the measured time falls within the range of 85 to 115 of T1 or 80 to 120 of T1 when I1 is 50 or less of ICT Repeat steps and for remaining phases After completion of the tests return the ACB to the original state If the tests show any problem contact our branch office or your local agency Caut...

Страница 31: ...a disconnector or the like to isolate all sources of power voltage from both the primary and auxiliary circuits Connect the OCR checker power terminals l and k to the OCR test terminals l and ka for R phase test l and kb for S phase test and l and kc for T phase test Close the ACB Supply power 100 110 VAC 50 60 Hz 3 VA to OCR checker terminals P0 and P1 and turn on the power switch Wait three seco...

Страница 32: ...KRB 5200h 26 5 3 Operation Characteristic Curves ...

Страница 33: ...ircuit 7 2 Dielectric Withstand Voltage Test 7 2 1 Main Circuit The withstand voltage of the main circuit is 2500 VAC for one minute between terminals with different poles between ON and OFF terminals and between main circuit terminals and ground Do not subject the ACB main circuit to test conditions that are severer than shown above 7 2 2 Auxiliary and Control Circuits Caution The following termi...

Страница 34: ...pection intervals Table 1 Environmental Conditions Installation site Example Guideline of inspection intervals 1 Interior where air is always kept clean and dry Dust proof and air conditioned electric room Within 10 years after installation Every 2 or 3 years 10 years or more after installation Every year 15 years or more after installation Every 6 months 2 Interior which is free from corrosive ga...

Страница 35: ...on with operating handle or trip button Electrical operation with UVT or SHT Smooth ON OFF Reset operation Replace ACB or if identified its defective parts Consult Terasaki for advice Crack damage or discoloration on the cover or mounting base Visual check No crack or damage No discoloration due to overheat Replace ACB Insulation resistance 500 V insulation resistance tester 5 MΩ or more If insula...

Страница 36: ...for inspection How to replace the arc horns arcing contacts Remove the U nut and replace the moving arc horn moving arcing contact Take care not to drop the spring washer Tighten the U nut to the standard torque of 1 3 2 2 N ｍ AME3B AME4B AME6B AME8B AME10B Remove the fixing screws and replace the stationary arc horn stationary arcing contact Tighten the fixing screws to the standard torque of 1 3...

Страница 37: ...to UVT Replace defective UVT Consult Terasaki for advice Replace defective SHT Reset handle Repair tripping mechanism Consult Terasaki for advice An excessive number of operation cycles will cause tripping mechanism to wear out Replace ACB Opening operation is impossible Main contact is welded Replace ACB Tripping operation is impossible 1 OCR is defective 2 UVT is defective Blockage of moving coi...

Страница 38: ...tactor for plug in type ACB Replace ACB Replace ACB Clean auxiliary circuit terminals Molded case overheats 1 Main contact surface roughens 2 Terminal screws or stud fixing screws loosen 3 ACB mounting screws is insufficiently tightened for plug in type ACB Polish contact surface with emery paper If contact surface has excessively roughened and internal resistance exceeds its limit see Table 4 on ...

Страница 39: ...KRB 5200f ...

Страница 40: ...2 Japan TEL 81 6 6791 2763 FAX 81 6 6791 2732 www terasaki co jp kiki info terasaki co jp Published in January 1996 Revived in August 1999 September 1999 December 2000 December 2003 June 2016 The contents of this manual may be subject to change without notice Recycle paper used ...

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