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(Safety in work)- (Safety Precaution)
- (Safety in Work Operations)
(Service Conditions)(Description)
(Specification)(Unpacking)
(Keeping & Carrying)(Auxiliaries)
- (Manual Charging)
- (Electric Charging)
- (Charging & ON-OFF Indicator)
(Operation of Drawout Mechanism)- (Drawin Method)
- (Drawout Method)
- (Drawout Position Indicator)
(Replacement)
- (How to Disassemble the Breaker)
- (How to Assemble the Breaker)
- (Relay and the Contact Holder)
- (Replacement of Motor)
(Wiring Diagram)- (SB Breaker Connection)
- (Inspection Prior to Applying Current)
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-
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C O N T E N T S
Safety Precaution
Qualified Person
!!
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Safety Precaution
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Dangerous Procedures
!
Safety in work operations
!
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Do not install in areas subject to high temperature, high humidity, dust, corrosive gas, vibrations, shocks.
To do so may result in malfunction or fire.
Should the ACB trip automatically, always clear the source of the malfunction before closing the ACB again.
Failure to do so may result in fire.
Terminal screws should be tightened periodically. Failure to do so may result in fire.
Use the ACB in 50/60Hz. Failure to do so may result in malfunction or fire.
Safety in work operations !
1. Normal service conditionsIf under ordinary conditions the following normal working conditions are all satisfied, the OSEMCO series air circuit breaker may be used unless otherwise specified.1) Ambient air temperature
A range of max. +40 to min. -5 is recommended.however, the average over 24 hours must not exceed +35
2) Altitude2,000m or less.
3) Environmental conditionsThe air must be clean, and the relative humidity 85% or less at a max. of +40Do not use and store in atmospheres with sulfide gas, ammonia gas etc.(H2S 0.01ppm, SO2 0.01ppm, NH3 a few ppm.)
4) Installation conditionsWhen installing the OSEMCO SB series air circuit breaker, refer to the installation instructions in the catalogue and instruction manual.
5) Storage temperatureA range of max. +60 to min. -20 is recommended.however, the average over 24 hours must not exceed +35
6) Replacement Approx. 10 years.Please see maintenance and inspection for further detail.
2. Special service conditions In the case of special service condition, modified air circuit breakers are available.Please specify when ordering. Service life may be shorter depend on service conditions.1) Special environmental conditions
If it is used at high temperature and/or high humidity, the insulation durability and other electrical/mechanical features may deteriorate. Therefore, the breaker should be specially treated. Moisture fungus treatment with increased corrosion-resistance is recommended.Since some parts may pose problems due to corrosion in the environments wherecorrosive gas results from the corrosion, the increased extra-corrosion proofspecifications is recommended.
2) Special ambient temperatureIf the ambient temperature exceeds +40 , the uninterrupted current rating will bereduced. Since the reduction value is different depending on the applicable standardrefer to table A
3) Special altitudeIf it is used at the 2,000m or higher the heat radiation rate is reduced decreasing theoperating voltage rating, continuous current capacity and breaking capacity.Moreover the durability of the insulation is also decreased owing to the atmosphericpressure. For further details, Please contact OSEMCO.
Less than100
Less than100
Table A) Derated Current as per ambient temperature
ACB.
Line Side Insulation Clearance
When switchgear will be designed, it should be maintained the line side insulation clearance betweenOSEMCO ACB and panel such as below illustration.
NOTEA Mechanical Interlock,
.
The dimension A should be increasedwhen mechanical interlock will be fitted.
Top Plate, Electrical Equipment
Side Plate, Electrical Equipment
A A
B
Charging indicator
Safety shutter
Shutter release lever
Drawout position indicator
Drawout locking
Drawout handle
Drawout lever
Drawout rail
Trip button
Front cover
Main frame
Arc extinguishing chamber
On/Off indicator
Close button
Control terminal block
Circuit Breaker
Cradle
On/Off Charging
Drawout type
Description
Trip locking
Auxiliary rail
Automatic trip
Mechanical interlocklever
Charging handle
Digital protection relay
Auto connector Lifting hook hole
Rear cover
Fixed contacts
Power-side busbar
Movable contacts Assy
Load-side busbar
Main closing spring(
Charging mechanism
Arc extinguishing chamber
Characteristics
Rated operating voltage VAC
Insulation voltage VAC
Number of poles
Frame current AF
Rated current A
Neutral current A
Breaking capacity
Rated breaking capacity
(kA R.M.S symmetrical)
Rated breaking capacity
(kA peak value)
Breaking duty
(O-CO-CO)
IEC
947-2
VDE
0660
BS
4752
220 / 240V
380 / 415V
440 / 500V
600 / 660V
480V
690V
Below 500V
600 / 660VMaking capacity (kA, peak)
Short timewithstand capacityAC 500V
Operation time
Number ofoperatingcycles
Maximumweight(kg)
Total breaking time
Rated closing time
With rated current
Without rated current
Fixed
3P 4P
3P 4P
Drawout
1Sec
3Sec
690
1000
3P / 4P
630
630
630
690
1000
3P / 4P
800
800
800
690
1000
3P / 4P
1000
1000
1000
690
1000
3P / 4P
1250
1250
1250
SB-606 SB-608 SB-610 SB-612
S
65
65
50
50
50
42
105
105
50
H
85
85
65
65
65
50
143
143
65
S
65
65
50
50
50
42
105
105
50
H
85
85
65
65
65
50
143
143
65
S
65
65
50
50
50
42
105
105
50
H
85
85
65
65
65
50
143
143
65
S
65
65
50
50
50
42
105
105
50
H
85
85
65
65
65
50
143
143
65
30
40ms
80ms
30 30 30
5,000
20,000
65(85)
35(48)
5,000
20,000
65(85)
35(48)
5,000
20,000
65(85)
35(48)
5,000
20,000
71(86)
44(54)
S : General model H : High interrupting capacity model
690
1000
3P / 4P
1600
1600
1600
690
1000
3P / 4P
2000
2000
2000
690
1000
3P / 4P
2500
2500
2500
690
1000
3P / 4P
3200
3200
2500
690
1000
3P / 4P
4000
4000
2500
690
1000
3P / 4P
5000
5000
2500
690
1000
3P / 4P
6300
6300
3200
S
85
65
50
50
50
42
105
105
50
H
100
85
65
65
65
50
143
143
65
S
85
65
65
65
65
42
143
105
65
H
100
85
85
65
85
50
187
143
85
S
85
65
65
65
65
42
143
105
65
H
100
85
85
85
85
50
187
143
85
S
85
85
65
65
65
42
143
105
65
H
100
100
85
85
85
50
187
143
85
S
100
100
85
85
65
50
187
143
85
H
130
130
100
100
85
65
220
187
100
S
100
100
85
85
65
50
187
143
85
H
130
130
100
100
85
65
220
187
100
S
100
100
85
85
65
50
187
143
85
H
130
130
100
100
85
65
220
187
100
50 65 65 65 85 85 85
40ms
80ms
5,000
20,000
71(86)
44(54)
5,000
20,000
90(105)
48(63)
5,000
20,000
90(105)
48(63)
5,000
20,000
120(135)
55(70)
3,000
10,000
185(200)
100(115)
3,000
10,000
200(215)
120(135)
3,000
10,000
240(260)
140(155)
SB-616 SB-620 SB-625 SB-632 SB-640 SB-650 SB-663
Before unpacking the breaker, check that all boxes and packages are in sound condition.While unpacking, Check that the breaker is in sound condition.Check that the information given on the rating and accessory nameplate and that on the purchase order agree.
If ACB will not be installed immediately after taking-over, Please keep in proper conditions as follows.Be sure to keep the ACB in the Off and Discharge position.Store the ACB in a dust free and dry environment, without corrosive gas. Note that particularly the compound of water and cement may cause corrosion on many parts.Place the ACB on a horizontal plane in normal state, not putting it directly on the ground.
.A) B)
Use a hauling rope for carrying as shown in the picture or a lift when carrying the breaker.A) In case of using a hauling ropeB) In case of using a lift
Manual Charging ( Charge) Position Indicator( )
7-8
CHARGE .
The closing spring is charged by manual charging handle, When charginghandle will be pulled forward 7-8 times, closing will be completelycharged.
. PUSH ON DISCHARGED ON
. PUSH OFF OFF .
When breaker will be ready for closing, charging indicator will showCHARGED. When pressing on-button, breaker will be closed andcharging indicator will show DISCHARGED and on-off indicator will showon-position.When pressing off-button, breaker will be tripped and on -offindicator will show off-position.
Motor Charging ( Charge)
B1, B4 .
.
When rated voltage will be supplied to terminals of B1 and B4, chargingmotor will be operate and closing spring will be charged. When chargingwill be completed, charging indicator will show CHARGED and chargingmotor operation will be automatically completed.
C1, C2.
O1, O2 .
After completion of charging coil, breaker will be closed. When ratedvoltage will be supplied to terminals of C1 and C2, And also chargingmotor will be operated and closing spring will be charged. When ratedvoltage will be supplied to terminals of O1 and O2, tripping relay will beoperated and breaker will be tripped. The repeated closing and trippingcan be available.
Position Indicator( )
OFF-DISCHARGED OFF-CHARGED
B
CHARGED
Breaker is tripped and closing spring is discharged.
CHARGED
Breaker is tripped and closing spring is charged. Ready for closing.
A
ON-DISCHARGED ON-CHARGED
D
CHARGED
Breaker is closed and closing spring is discharged.
CHARGED
Breaker is closed and closing spring is charged.
C
(Draw-in Method)Trip Button open .
.DISCONNECTED
.
.
.
Push the trip button and make the breaker off. Release the extension rail lock lever and pull drawout lever to arrow-marked direction.Check that the cradle position indicator shows DISCONNECTED.Place the breaker on the rail and push slowly until it does not move.Insert the drawout handle into its aperature and turn the drawout handle until breaker is completely inserted to cradle.Then, indicator will show CONNECTED.
(Draw-out Method)Trip Button open .
.
DISCONNECTED .DISCONNECTED
.
Push the Trip button and make the breaker off. Pull extension rail lock lever upward.Insert the drawout handle into its aperature and turn counter-clockwise until position indicator shows DISCONNECTED.When breaker is latched again on disconnected position, breaker can be completely drawnout by lifting of drawout lever once more.
3 .
Monunted on cardle, this device indicates the position of connected, test & disconnected asfollows.
Normal operation
Test position
Drawout position
.1) + 6mm . 2) .3) 8mm .4) 4 8mm .
1) Remove 6mm screws from arc chamber with + driver and take it away.2) Trip the breaker and remove snap rings from the connector link connected to input shaft, then remove link pins.3) Take all 8mm bolts at back cover away by using a box wrench, and then remove each back covers, which are
separated by each phase.4) When 8mm bolts are removed out of 4 places at the front control panel, the control panel will be easily taken
away.
Follow the following procedure for disassembling:
.Assembly should be done in the reverse sequence of disassembly as follows:
1) 50Nm .2) .3) 50Nm .4) 6mm .
1) Assemble a operating device in the breaker mold, tightening with 50Nm.2) Fit the link pin of the contact holder and fasten the snap ring.3) Trip the operating part of the breaker and fasten the rear back covers sequentially, tightening the bolts
with 50Nm.4) Insert Arc extinguishing chamber sequentially and fit square nuts in the bottom part, tightening with
6mm screws symmetrically.
1) When screws of fixing bracket for coils will be removed, each coils can be separated. After separation of leadwire for power supply, individual checking & replacement can be easily performed. When disassembling the coil, Make sure the correct identification of tripping coil, closing coil, and under voltage coil. The mis-location of coils may cause malfunction.
2) The contact case can be easily separated when 6mm bolts at the bottom of the output side busbar bracket will be removed with a box wrench as shown in the above illustration.
When dismantling the motor1) Remove 4 ( ) fixing bolts for ACB cover. Then, cover can be separated.2) Disconnect the wires (B1, B4) connected to the motor from terminal board or auto connector.
(Be careful against electric shock.)3) After disconnecting the wires (B1, B4), remove 1 screw( ) supporting the motor to separate the motor.
When inserting the motor1) Align the axis of charging mechanism with a groove of the motor and then insert the motor.
(If it doesnt fit well, insert it by turning the handle manually little by little.)2) After inserting the motor, fix the motor by using 1 screw ( ) supporting the motor.3) Connect the wires (B1, B4) connected to the motor with terminal board or auto connector.
(Be careful against electric shock.)4) Fix the cover by using 4 screw ( ) that fix the ACB cover. then, the motor replacement will be completed.
Notes 1) When fitting the charging motor for manual type ACB, closing coil should be installed together.2) Closing coil is located in front of tripping coil. Each coil is fixed with 1 screw.3) Connect the wires (C1, C2) from closing coil to terminal board or auto connector.
. ( )
The breaker connector numbers are connected as follows :(The numbers are commonly applied for fixed & drawout type.)
Aux normal b contact
Aux normal a contact
Normal b contact of OCR
Normal b contact of GR
Before connecting the terminal, check the terminal numbers. Wrong connection may cause the damage to breaker.
As for the DC control source, Be sure to check the polarity before connection.
Input power for charging motor
Input power for closing coil
Input power for tripping coil
Input power for digital protection relayFor Drawout Type
For Fixed Type
Connected DisconnectedControl Source Trip Close
AT : Reset ButtonBPO : Trip Push ButtonBPF : Closing Push ButtonCE : Connected Position Contact(c-contact)M : MotorXF : Closing ReleaseOT : OCR, GR Trip ContactUT : UVR Trip ContactMX : Tripping ReleaseU1,U2 : MN, MNR Control Source
CD : Contacts for disconnected position(c-contact)MN : UVR (Instantaneous Type)MNR : UVR (Time-delay Type)C : 4a ContactO : 4b ContactSDE1 : OCR Trip Indication Contact (a-contact)SDE2 : GR Trip Indication Contact (a-contact)CH : Motor Limit Switch (c-contact)M1, M2 : OCR, GR, UVR & OVR Control Source
The above circuit diagram shows de-energized status.1) When UVR is not fitted, the dotted line will be connected
as actual line.2) Either internal CT or external ZCT is selectively used.
Do not energize to terminal K and L
Connected DisconnectedControl Source Trip Close
N
Between the live parts of the main circuit and earth
Between the live parts of different poles
Between the power supply and the load terminals
Between the load parts of the main circuit and the live part of the control/operation circuits
Between the live part of the control/operation circuit and earth
busbar?
Are the electrical wires and bus bars fastened securely to the external line connection main terminal ?
, . ?
Are any conductive foreign objects, such as screws, nail, processing chips from the panel and also connecting lead wires for the withstand voltage tests, left around the terminals ?
, ?Is the front cover, base, etc. cracked or damaged ?
, ? Has the breaker been flooded or is there condensation of dew ?
500V Measure the insulation resistance with a 500V insulation resistance tester.
Perform the withstand voltage test
1. Inspection Prior to Applying CurrentACB , Perform the following inspections after installing the ACB and before applying the current
(Inspection item) (Criteria)
1.1 Standards for Insulation Resistance and Withstand Voltage Tests
:5 (ACB :100 )Insulation Resistance Test : Must be no less than 5 (must be no less than 100 for the ACB alone)
Withstand Voltage Test(1min)
Measurement Location Test Voltage
(M12 screw : 400~500kg-cm, 40~50N.m)Must be tightened at the designated tightening torque
Must be removed completely.
There must be no cracks or damage.
, .There must be no flooding or dew condensation.
1.1Must comply with the standards given in 1.1
1.1Must comply with the standards given in 1.1
2,500V
2,500V
2,500V
2,500V
2,000V
ACB . Replace the ACB if there is any
detrimental discoloration.
. Put methyl1 alcohol on a cloth, etcand wipe.
, Cradle.
Replace the cradle if there are anyabnormalities.
, ACB.
Remove dust and clean ACB or replace.
There must be no detrimentaldiscoloration
. There must be no detrimentaldeposits of dust or soot.
. There must be no discoloration of thejunction or deformation of the flat spring
5 (ACB : 100 ). Must be no less than 5(No less than 100 for the ACB alone)
Visual inspection
Visual inspection
Visual inspection
1.1. Perform in
accordance withsection 1.1
Discoloration of the movingand fixed conductors
Soiling of the main circuitconductors
. Discoloration and deformationof the main circuit junction
Measurement of insulationresistance
Inspection MethodInspection item Criteria Treatment Method
ACB 1.
It is recommended that periodic inspections are performed once about one month commencing useand thereafter according to the guidelines for inspection and renewal to ensure a stable, long-term useof the ACB.
2.1 External Appearance of the ACB
2.2 Conductive Part of the Main Circuit
Air
Blow with air upon each periodicinspection or clean and remove the dustwith a dry cloth
.Retighten if necessary
.Replace the product if flooding orimmersion has occurred.
Retighten if necessary
.There must be no detrimental deposits of dust and dirt.
Tightening torque M12 screw :400~500kg-cm (40~50N.m)
. There must be no flooding or immersion
Must be tightened securely.
Visual inspection
Tightening with torquewrench.
Tighten with a screwdriver.
Dust and soiling
Loosening of the maincircuit terminals
Flooding immersion inwater
Loosening of thecontrol terminals
Inspection MethodInspection item Criteria Treatment Method
2. Periodic Inspection
2.3 Arc Arc Extinguishing Chamber
Inspection MethodInspection item Criteria Treatment Method
2.4 Switching Mechanism Part
Inspection MethodInspection item Criteria Treatment Method
3. Inspections After a Breaking operation
ACB , ., ACB
. .
Inspection the items detailed for periodic when the ACB has performed a breaking operation as a result of an overloadcurrent or a short-circuit current. Reuse a possible if the relevant criteria are satisfied. However, it is recommended that the ACB be replaced as soon as possible after it has interrupted a large fault current. The ACB should be monitored for unusual temperature rises and other abnormalities until replacement occurs.
1.
Please contact our company if closingcannot be performed even aftercompleting the primary treatment.
UVT UVT.
Refer to the section Abnormalities ofthe UVT if there is an abnormality ofthe UVT.
Charge.
Please contact our company if chargingcannot be performed manually.Refer to the section Chargingdisabled if electrical charging is notpossible.
Key-Lock
Release the Key-lock Device.
DISCONNECTED , TESTCONNECTED
Setting
Set to either of the DISCONNECTED , TEST
or the CONNECTEDpositions.
UVT
Apply voltage to the UVT.
Charge.
Charge.
1.
The closing operation cannot be performed.
Key-Lock .
The Key-lock device is not released.
The drawout position is not appropriate.
UVT.
Voltage is not applied to the UVT.
Spring charge .
The closing spring is not charge.
1. Cannot close
Probable CauseType & condition of Abnormality
1Primary Treatment
2Secondary Treatment
4. Fault Diagnosis
Treatment
Closing Coil
Replace the Closing Coil if there are noabnormalities in the contact of thefasten terminals
1.
If the voltage is not applied, examine the control circuit.
2.
If the voltage is applied, check the contact of the fasten terminal at the lower part of the control circuit terminal block
1. ,
If the voltage is not applied, examine the control circuit
Closing Coil ( )
The closing coil does notoperate. (Manual closing isable)
2. The closing operation is performed.
Trip(Off)
Tripping(Off) is performed simultaneously with theclosing operation.
1. SHT(MX). ( OFF
.)
The SHT(MX) will notoperate.(Manual OFFoperation is able)
1.Cannot close
2.OFFOff disabled
Probable CauseType & condition of Abnormality
1Primary Treatment
2Secondary Treatment
Treatment
, , , motor
Secure the contact if there is anabnormality Replace the motor unit if there are no abnormalities
, motor unit, ,
.
Replace the motor unit if there are noabnormalities. Please contact ourcompany if there is an abnormality
Apply the voltage
1. MotorThe motor won't turn.
B1, B4 ,
Check the contact of the fastening terminals, B1, B4 below the control circuit terminal block. check the polarity also.
2. Motor charge
The motor turns but won't charge.
charge
Examine whether manual charging is possible.
1. Charge.
Electrical charging cannot be performed.
The voltage is not applied
The voltage is applied
3.ChargeCharging disabled
Probable CauseType & condition of Abnormality
1Primary Treatment
2Secondary Treatment
Treatment
, ACB
Replace the ACB if discoloration of theconductor or burning of the terminalmolding is noted
Cradle
Replace the cradle
ACB
Replace the ACB
Retighten
Decrease the current flow
1.
The fastening of the connecting conductor is loose
2.
The contact pressure is reduced
3.
The wear of the contact is severe
4. Current flow is large
4.
Unusual temperature rise
Probable CauseType & condition of Abnormality
1Primary Treatment
2Secondary Treatment
Treatment
,
Examine the power supply circuit if thevoltage is not applied
UVT Coil UVT Coil
Replace the UVT coil if there is nocontinuity
,
Replace the auxiliary switch if there are no abnormalities
Please contact OSEMCO
Check the input voltage
UVT Coil
Check the continuity of the UVT coil
Check the contact of the automatic connection terminal
1.
Voltage is not applied to the input terminals
2. UVT Coil
The UVT coil is disconnected.
1. Connector
The connector is disconnected
2.
(ACB )
Breakage of the operating parts of the auxiliary switch(ACB main unit)
5.UVT
The UVT will not draw in
6.
The auxiliary switch will not operate
Probable CauseType & condition of Abnormality
1Primary Treatment
2Secondary Treatment
Treatment
