INSTRUCTION MANUAL FOR AIR CIRCUIT BREAKERS (With Draw-out Cradle and Type AGR-11B,21B,22B,31B Overcurrent Protective Device) Types: AR208S AR212S AR216S AR220S AR325S AR332S AR440S AR440SB AR212H AR216H AR220H AR316H AR320H AR325H AR332H AR420H AR440H Notice z Be sure to read this manual before installing, operating, servicing, or inspecting the ACB. z Please retain this manual for future reference. z Electrical work must be done by competent persons.
TABLE OF CONTENTS 5-3-2-1. General 52 1. SAFETY NOTICES 5 5-3-2-2. Available screens 52 2. RECEIVING AND HANDLING 7 5-3-2-3. Monitor screen 55 2-1. Transportation Precautions 7 5-3-2-3-1. Monitor screen (AGR-21B,22B) 55 2-1-1. Transporting the ACB 7 5-3-2-3-2. Monitor 1 screen (AGR-31B) 56 2-1-2. Transporting the breaker body 8 5-3-2-3-3. Monitor 2 screen (AGR-31B) 57 2-1-3. Transporting the draw-out cradle 8 5-3-2-4. Setup screen 59 2-2. Storage Precautions 8 5-3-2-4-1.
KRB-5377 4
1. SAFETY NOTICES Thank you for purchasing the TERASAKI AR-series Air Circuit Breaker (TemPower2). This chapter contains important safety information. Be sure to carefully read these safety notices, instruction in this manual, and other documents accompanying the Air Circuit Breaker (hereinafter referred to as the ACB) to familiarize yourself with safe and correct procedures or practices before installing, operating, or servicing the ACB.
Operation Precautions (continued) CAUTION z Repeated open/close operation by the motor charging mechanism without pause should not exceed 15 times. If repeated z z z z z z z continuous open/close operation is inevitable, a pause of at least 20 minutes should be provided after the repetitions of 15 times. Otherwise, a spring charging motor may be burnt out. Do not bring your hand or face close to arc gas vent of the arc chamber while the ACB is closed.
2. RECEIVING AND HANDLING Upon receipt of your ACB, check the following. If you have any question or problem, contact us at the indicated on the back cover of this manual. z Check that the ACB received is as ordered and that the accessories are as specified. z Check that the ACB is not damaged during shipment. 2-1. Transportation Precautions DANGER z Never stand under the ACB that has been lifted or suspended by a lifter or lifting attachments.
2-1-2. Transporting the breaker body z Use an optional lifter or lifting plate to transfer the breaker body. z When transporting the breaker body on a lifter, move the lifter with the lifter fork held at the lowest possible position. z Take care not to exert forces on the front cover and the control circuit contacts shown in Fig. 2 . Otherwise, a deformation or damage may result. Lifting plate Control circuit contact Front cover Front view Rear view Fig. 2 Transporting the breaker body 2-1-3.
2-3. Installation Precautions CAUTION z Electrical work must be done by competent persons. z Do not place the ACB in such an area that is subject to high temperatures, high humidity, dusty air, corrosive gases, strong vibration and shock, or other unusual conditions. Mounting the ACB in such an area could cause a fire or malfunction. z Be careful to prevent foreign objects (such as debris, concrete powder, dust, chippings, and iron powder) and oil or rainwater from entering the ACB.
Do not install the ACB in such an area that is exposed to direct sunlight. z Make sure that the mounting base has a sufficient capacity of bearing the weight of the ACB (see Table 3 and Table 4). The mounting base must be protected against vibration. Take appropriate measures to provide a perfect protection to the mounting base against resonance.
z Connect conductors to the main circuit terminals in the conductor connection area as shown in Figs. 6 - 9. Vertical terminals, 3 Poles Right side view Vertical terminals, 4 Poles Back view Right side view Horizontal terminals, 3 Poles Right side view Horizontal terminals, 4 Poles Back view Right side view Front terminals, 3 Poles Right side view Back view Back view Front terminals, 4 Poles Back view Right side view Back view Fig.
Vertical terminals, 3 Poles Right side view Vertical terminals, 4 Poles Back view Right side view Horizontal terminals, 3 Poles Right side view Horizontal terminals, 4 Poles Back view Right side view Front terminals, 3 Poles Right side view Back view Back view Front terminals, 4 Poles Back view Right side view Back view Fig.
Vertical terminals, 3 Poles Right side view Back view Vertical terminals,4 Poles Right side view Back view Fig. 8 Conductor (include screw) connection area (AR440S) *Insulation distance of conductor connection area and earth metal is more than 12.5mm.
●Vertical terminals, 3 Poles Right side view Back view ●Vertical terminals, 4 Poles Right side view Back view Fig. 9 Conductor (include screw) connection area (AR440SB) *Insulation distance of conductor connection area and earth metal is more than 12.5mm. z Use a support to hold conductors securely at distance L as shown in Fig. 10 and Table 2.
z The following procedure makes it easy to make connections with plug-in tab terminals (#187) of position switches, control circuit terminals, and auxiliary switches. (1) Draw out the breaker body to the removed position, and remove it using an optional lifter or lifting plate. Refer to sections 4-2-2 and 2-1-2. (2) If the ACB is equipped with the control terminal block cover, loosen both the cover fixing screws and remove the cover. (3) Remove the terminal block fixing screws shown in Fig. 11.
3. GENERAL 3-1. Types and Descriptions TemPower2 is available in types shown in Tables 3 and 4. Table 3 Standard types Frame size (A) Type Max.
Table 4 High-performance types Frame size (A) Type Max.
Table 6 shows the dielectric withstand voltage and the insulation resistance of the ACBs. CAUTION z Do not perform dielectric withstand/insulation resistance tests under other conditions than specified. Doing so may cause a malfunction.
3-2. Parts and Functions Fig. 14 provides a general views of the ACB.
1 ◯ ACB 2 ◯ Draw-out cradle 3 ◯ Breaker body 4 ◯ 5 ◯ 6 ◯ OFF button ON button ON-OFF indicator 7 ◯ Charge indicator 8 ◯ 9 ◯ 10 ◯ Charging handle Position indicator Grip Draw-out handle insertion hole Release button 11 ◯ 12 ◯ 13 ◯ Position padlock lever (optional) 14 ◯ Lock-in-OFF plate (optional) 15 ◯ ON-OFF button cover 16 ◯ ON-OFF cycle counter (optional) 17 ◯ OCR cover 18 ◯ Overcurrent release (OCR) 19 ◯ 20 ◯ 22 ◯ 23 ◯ 24 ◯ 25 ◯ Front cover Rating nameplate Specification nameplat
38 ◯ Control circuit terminals Allow connections of external control wire to the control circuits. Wire connections are made through M4 screw terminals. Fig. 15 shows the control circuit terminals. Fig.
3-3. Circuits and Ratings Fig. 17 shows an ACB(AGR-11B) circuit diagram and Table 9 and Fig. 18 show the function of each terminal and the meaning of each sign in the diagram. Fig. 17-1 Breaker circuits 1 Table 9-1 Terminal functions and circuit symbols 1 (Applicable to both 50 and 60Hz for AC. Terminal No.
Fig. 17-2 Breaker circuits 2 Table 9-2 Terminal functions and circuit symbols 2 Symbol S1 - S4 CT1 - CT3 MHT M Ry SW1 SW2 Meaning Current sensors *5 Power supply CT *6 Magnet hold trigger Spring charging motor Control relay Spring charged “OFF” switch Control relay a contact Symbol LRC SHT UVT Meaning Latch release coil Shunt trip device Undervoltage trip device Main/control circuit contact Hand connector User wiring Relay or LED *1: For 4-pole ACBs.
Fig. 19 shows an ACB(AGR-21B,22B,31B) circuit diagram and Table 10 and Fig. 18 show the function of each terminal and the meaning of each sign in the diagram. AGR-21B,22B,31B Fig. 19-1 Breaker circuits 1 Table 10-1 Terminal functions and circuit symbols 1(Applicable to both 50 and 60Hz for AC.
Fig. 19-2 Breaker circuits 2 Table 10-2 Terminal functions and circuit symbols 2 Symbol S1 - S4 CT1 - CT3 MHT M Ry SW1 SW2 *1 *2 *3 *4 *5 *6 *7 Meaning Current sensors *6 Power supply CT *7 Magnet hold trigger Spring charging motor Control relay Spring charged “OFF” switch Control relay a contact Symbol LRC SHT UVT Meaning Latch release coil Shunt trip device Undervoltage trip device Main/control circuit contact Hand connector User wiring Relay or LED For 4-pole ACBs.
Fig. 20 provides the terminal arrangement of the ACB. Position switches (When 4C is used) Upper stage Middle stage Lower stage (When 2C is used) Upper stage Middle stage Lower stage Auxiliary switches (When standard 4C + optional 6C are used) (When standard 4C is used) (Com. terminals) Control/operation circuit The communication terminal block is added when the undervoltage trip device and the separate N-phase CT are used or the zone interlock, external indication or communication capability is provided.
Tables 11 - 16 show the ratings of the operation power supply, the shunt trip device (SHT), the undervoltage trip device (UVT), auxiliary switches, position switches, operation indication contacts, and the N-phase CT.
Table 14 Ratings of auxiliary and position switches Voltage (V) AC100 - 250 AC251 - 500 DC8 DC30 DC125 DC250 DC125 - 250 *1 *2 *3 *4 *5 Auxiliary switches *1 *2 For general feeder For microload *3 Inductive load (A) Inductive load (A) Resistive load (A) Resistive load (A) *4 *5 5 5 0.1 0.1 5 5 1 1 0.1 0.1 1 1 - Position switches Resistive load (A) 11 10 6 0.6 0.3 - Inductive load (A) *5 6 6 5 0.6 0.3 - Using b-contact results in contact chatter of 20 ms or less when the ACB opens or closes.
4. OPERATION 4-1. Charging and Opening operation DANGER z Never touch live terminal parts. Otherwise, electric shock may result. CAUTION z Do not force down the charging handle after completion of manual charging operation. Doing so may cause a malfunction. z The permissible operating voltage of the spring charging motor is 85 to 110% of the rated ac voltage or 75 to 110% of the rated dc voltage. Be sure to supply a voltage within the above ranges to the motor. Otherwise, burnout may result.
z Motor charging 1 ) changes to “DISCHARGED” while the specified operation voltage is applied to the control When the charge indicator (Fig. 23 ◯ 02 and □ 22 , the charging motor is activated to start charging the closing springs. Upon completion of the charging circuit terminals □ operation, the charge indicator shows “CHARGED” and the charging motor is automatically deactivated.
4-1-5. Motion of operation mechanisms Figs. 24 - 27 illustrate the motion of the charging and ON-OFF mechanisms. 3 ◯ 1 rotates For manual closing operation, ON button ◯ counterclockwise. For electrical closing operation, 1 ' protrudes downward from the latch push rod ◯ 2 rotates release coil (LRC) and charge latch trigger ◯ 3 clockwise. This rotates closing trigger shaft ◯ 4 disengages clockwise and closing release lever ◯ from a semicircular pawl and rotates clockwise.
3 ◯ The charging handle or the charging motor provides a 1 . This counterclockwise rotation to charging cam ◯ 2 and closing tripper rotates closing release lever ◯ 3 counterclockwise and a semicircular pawl lever ◯ 2 . And charging engages with closing release lever ◯ 4 rotates clockwise so that closing spring ◯ 5 is lever ◯ compressed and closing cam 5 rotates counterclockwise. At this time, each component is positioned as shown in Fig. 24. 2 ◯ 5 ◯ 6 ◯ 1 ◯ 4 ◯ Fig.
4-2. Draw-out and Insertion Operation 4-2-1. General The draw-out type ACB consists of the breaker body and the draw-out cradle. The main and control circuit terminals are installed on the draw-out cradle, which permits you to draw out and inspect or service the breaker body without the need for removing wiring from the terminals. The draw-out mechanism allows you to move the breaker body to any of the four positions as shown in Fig. 28.
4-2-2. Draw-out operation DANGER z Never touch live terminal parts. Otherwise, electric shock may result. z Do not leave the ACB body in the removed position. The weight of the ACB may cause serious injury. CAUTION z If the ACB has the breaker fixing bolts, be sure to loosen the bolts on both sides before draw-out operation. Otherwise, damage to the ACB may result. z Make sure the draw-out cradle is secured with mounting screws before drawing out the breaker body.
4-2-2-2. Moving the breaker body from the TEST position to the ISOLATED position 1 ) cannot be inserted). 1) Open the ACB. (If the ACB remains closed, the draw-out handle (Fig. 29 ◯ 6 ). The release button will be locked depressed. 2) Press the release button (Fig. 29 ◯ 14 ) if locked. See section 4-5. 3) Unlock the position lock lever (Fig. 29 ◯ 4 ). And slowly turn counterclockwise until a 4) Insert the draw-out handle into the draw-out handle insertion hole (Fig. 29 ◯ 5 ) shows “ISOLATED”.
z Do not leave the ACB body on the draw-out rail pulled out. 2 ), if fitted, are loosened and not arrest the breaker body. 4) Make sure the breaker fixing bolts (Fig. 29 ◯ 15 ) of the communication terminal block, if fitted, is so positioned that it does not get 5) Make sure the hand connector (Fig. 29 ◯ caught between the breaker body and the draw-out cradle. 2 ), make sure the bolts are loosened and, holding both the grips (Fig. 29 ◯ 10 ), 6) If the ACB has the breaker fixing bolts (Fig.
4-2-4. Contact status of auxiliary and position switches Tables 18 and 19 show the contact status of auxiliary switches and position switches respectively. Table 18-1 Contact status of auxiliary switches ACB state Breaker body position ON OFF CONN.
4-4. Lock in OFF Procedure 1) Open the OFF button cover shown in Fig. 33. 2) Raise the OFF-lock tab and close the button cover. 3) Lock the button cover using a padlock with ø6 shackle (up to 3 padlocks can be used) as shown in Fig. 33. The OFF button is locked depressed, which disables the ON button. Button cover locking hole OFF button OFF-lock tab OFF button cover Fig. 33 Locking the OFF button 4-5.
4-6. Breaker Fixing Bolt Securing Procedure 1) Move the breaker body to the CONN. position. 2) Loosen the breaker fixing bolt shown in Fig. 35, move the spring and flat washers close to the bolt head and push the bolt into the U-notch of the grip. 3) Tighten the breaker fixing bolt using the draw-out handle. This procedure is required for both the sides of the ACB. Breaker fixing bolt Spring washer Flat washer U-notch Grip Fig. 35 Securing the breaker fixing bolts 4-7.
5. OVERCURRENT RELEASE (OCR) Options available for the type AR ACBs include a highly reliable, multi-functional overcurrent release (OCR) with a built-in 16-bit microprocessor. This OCR is supplied with power through a CT and main circuit current signals from current sensors. When the OCR detects a fault, it sends a trip signal to the magnet hold trigger (MHT) or provides a trip indication or an alarm depending on the type of the fault.
Table 21 Specifications of type AGR-21B, 22B, 31B OCR (z: Standard, {: Optional, –: Not applicable) Application Characteristic For general feeder L AGR31BL-XX AGR21BR-XX AGR31BR-XX PS PG PS PG PS PG PS PG z z z z z z z z z z z z – – z – – – z – – – z – – – z – – – – z – – – z 1 ○ 6 N-phase protection (NP) ○ { { { { { { { { – – – – 2 ○ 7 Negative-phase sequence protection (NS) ○ 2 ○ 3 ○ 8 ○ 9 Line side ground fault protection (REF) ○ 2 ○ 9 ○ 10 Contact overhea
5-2. Characteristics 5-2-1. L characteristic for general feeder A general view, characteristic settings, and characteristic curves of the type AGR-11BL OCR (with L characteristic) are shown in Fig. 37, Table 22, and Fig. 40 respectively. 4 ◯ 1 ◯ 3 ◯ 2 ◯ 7 ◯ 6 ◯ 8 ◯ 9 ◯ 12 ◯ 11 ◯ 13 ◯ 16 ◯ 17 ◯ Fig. 37 General view of type AGR-11BL OCR (with L characteristic) Table 22 Settings of type AGR-11BL OCR (with L characteristic) No. Setting item Symbol Setting range CT rated primary current [ICT] × (0.
Characteristic settings and characteristic curves of the type AGR-21,31BL OCR (with L characteristic) are shown in Table 23 and Fig. 38-40 respectively.
Long time delay trip, Short time delay trip, Instantaneous trip N-phase protection trip and Pre-trip alarm Negative-phase sequence protection Ground fault trip Fig.
5-2-2. R characteristic for general feeder Characteristic settings and characteristic curves of the type AGR-21BR,31BR OCR (with R characteristic) are shown in Table 24 and Figs. 41 - 47 respectively. Table.
Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm N-phase protection Fig. 42 Characteristic curves of type AGR-21BR,31BR OCR (with R characteristic of I0.02t protection type) Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm N-phase protection Fig.
Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm N-phase protection Fig. 44 Characteristic curves of type AGR-21BR,31BR OCR (with R characteristic of I2t protection type) Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm N-phase protection Fig.
Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm N-phase protection Fig. 46 Characteristic curves of type AGR-21BR,31BR OCR (with R characteristic of I4t protection type) Negative-phase sequence protection Ground fault trip Fig.
5-2-3. S characteristic for generator protection Characteristic settings and characteristic curves of the type AGR-21BS/22BS/31BS OCR (with S characteristic) are shown in Table 25 and Figs. 48 and 49 respectively. Table.
Long time delay trip, short time delay trip, instantaneous trip and pretrip alarm Reverse power trip Fig.
5-3. OCR Setting Procedure 5-3-1. OCR Setting Procedure (AGR-11B type) CAUTION z OCR field tests and setting changes must be performed by competent persons. z After setting changes are made, the settings be checked with e.g., a type ANU-1 OCR checker (optional). z After completion of OCR tests, be sure to return the settings to the original values. Failure to do so may cause a fire or burnout.
5-3-2. OCR Setting Procedure (AGR-21B,22B,31B type) CAUTION z OCR field tests and setting changes must be performed by competent persons. z After setting changes are made, the settings be checked with e.g., a type ANU-1 OCR checker (optional). z After completion of OCR tests, be sure to return the settings to the original values. Failure to do so may cause a fire or burnout. z Before changing OCR settings, open the ACB and then lock the OFF button to prevent the ACB from being closed inadvertently.
The type AGR-21B/22B OCR has six screens available as shown in Fig. 54 below. Press the MENU button to go to the next screen. Monitor screen (MONI): See 5-3-2-3-1. This is the initial screen that appears when control power is turned on. Various current values can be viewed on this screen. Setup screen (SETUP): See 5-3-2-4-1. This screen allows reviewing the rated voltage, CT rated primary current or other specifications and changing settings. Reset screen (RESET): See 5-3-2-5-1.
The type AGR-31B OCR has seven screens available as shown in Fig. 55 below. Press the MENU button to go to the next screen. Monitor 1 screen (MONI): See 5-3-2-3-2 This is the initial screen that appears when control power is turned on. Various current values can be viewed on this screen. Monitor 2 screen (MONI IVP): See 5-3-2-3-3. Various current values, line voltage, phase voltage, power, demanded power, electrical energy, power factor and frequency can be viewed on this screen.
5-3-2-3. Monitor screen 5-3-2-3-1. Monitor screen (AGR-21B,22B) Fig. 56 shows how to navigate the monitor screen and Table 26 lists the items that can be viewed on this screen. 8 ◯ 1 ◯ 9 ◯ 2 ◯ 3 ◯ 4 ◯ 5 ◯ 6 ◯ 7 ◯ 2 ◯ 8 ◯ 1 ◯ Fig. 56 Monitor screen navigation Table 26 Monitor subscreens No. 1 ○ 2 ○ 3 ○ 4 ○ 5 ○ Subscreen item *1 Max.
5-3-2-3-2. Monitor 1 screen (AGR-31B) Fig. 57 shows how to navigate the monitor 1 screen and Table 27 lists the items that can be viewed on this screen. 4 ◯ 5 ◯ 1 ◯ 2 ◯ 3 ◯ 4 ◯ 1 ◯ Fig. 57 Monitor 1 screen navigation Table 27 Monitor 1 subscreens No. 1 ○ Subscreen item *1 Max. phase current (present value) Description Initial display Displayed only when THE ACB is equipped with the 2 Ground fault current (present value) ○ ground fault trip function 3 Max.
5-3-2-3-3. Monitor 2 screen (AGR-31B) Fig. 58 shows how to navigate the monitor 2 screen and Table 28 lists the items that can be viewed on this screen. 1 ◯ 18 ◯ 2 ◯ 3 ◯ 4 ◯ 5 ◯ 6 ◯ 7 ◯ 2 ◯ 8 ◯ 9 ◯ 10 ◯ 11 ◯ 9 ◯ 9 ’ ◯ 10 ’ ◯ 11 ’ ◯ 9 ’ ◯ 12 ◯ 13 ◯ 14 ◯ 12 ◯ 15 (from the next page) ◯ 15 (to the next page) ◯ Fig.
12 (to the previous page) ◯ 12 - ◯ 14 (from the previous page) ◯ 15 ◯ 16 ◯ 17 ◯ 2 (to the previous page) ◯ Fig. 58-2 Monitor 2 screen navigation Table 28 Monitor 2 subscreens No.
5-3-2-4. Setup screen 5-3-2-4-1. Setup screen(AGR-21B,22B) Fig. 59 shows how to navigate the setup screen and Table 29 lists the items that can be viewed on this screen. 1 ◯ 21 ○ 2 ◯ 3 ◯ 4 ◯ 5 ◯ 6 ◯ 7 ◯ 7 ◯ 14 ◯ 8 ◯ 2 ◯ 9 ◯ 10 ◯ 9 ◯ 11 ◯ 12 ◯ 2 ◯ 13 ◯ 11 ◯ 17 - ◯ 19 (from the next page) ◯ 17 (to the next page) ◯ Fig.
11 (to the previous page) ◯ 11 - ◯ 13 (to the previous page) ◯ 15 ◯ 14 ◯ 16 ◯ 17 ◯ 14 ◯ Cancel Setting change mode 18 ◯ Other settings can be changed in the same way on the respective subscreens. 2 ◯ Save change 19 ◯ 20 ◯ ：Flashing Fig. 59-2 Setup screen navigation Table 29 Setup subscreens No.
5-3-2-4-2. Setup screen(AGR-31B) Fig. 60 shows how to navigate the setup screen and Table 30 lists the items that can be viewed on this screen. 26 ○ 1 ◯ ×2 2 ◯ 3 ◯ 4 ◯ 5 ◯ 6 ◯ 7 ◯ 7 ◯ 17 ◯ 8 ◯ 2 ◯ 9 ◯ 10 ◯ 11 ◯ 12 ◯ 9 ◯ 13 ◯ 14 ◯ 2 ◯ 15 ◯ 13 ◯ 24 (from the next page) 16 - ◯ ◯ 16 (to the next page) ◯ Fig.
13 (to the previous page) ◯ 13 - ◯ 15 (from the previous page) ◯ 16 ◯ 18 ◯ 17 ◯ 19 ◯ 20 ◯ 21 ◯ 21 ◯ 2 ◯ 22 ◯ 17 ◯ Cancel Setting change mode Other settings can 23 ◯ be changed in the same way on the respective subscreens. Save change 24 ◯ 25 ◯ : Flashing Fig.
Table 30 Setup subscreens No. 1 ○ 2 ○ 3 ○ 4 ○ 5 ○ 6 ○ 7 ○ 8 ○ 9 ○ 10 ○ 11 ○ 12 ○ 13 ○ 14 ○ 15 ○ 16 ○ 17 ○ 18 ○ 19 ○ 20 ○ 21 ◯ 22 ◯ 23 ◯ 24 ◯ 25 ◯ 26 ◯ *1: *2: *3: *4: *5: *6: *7: Subscreen item *1 (Monitor 1 screen) Main circuit rated voltage CT rated primary current Setting change – Disabled Disabled Setting range/Remarks *2 See 5-3-2-3-2.
5-3-2-5. Reset screen 5-3-2-5-1. Reset screen (AGR-21B,22B) Fig. 61 shows how to navigate the reset screen and Table 31 lists the items that can be cleared on this screen. When an item is cleared while its contact output is on, the contact output turns off. 8 ◯ 1 ◯ ×2 3 ◯ 2 ◯ 4 ◯ 2 ◯ Cancel 5 ◯ Clear 6 ◯ 7 ◯ Clear mode Other settings can be cleared in the same way on the respective subscreens. : Flashing Fig. 61 Reset screen navigation Table 31 Reset subscreens No.
5-3-2-5-2. Reset screen(AGR-31B) Fig. 62 shows how to navigate the reset screen and Table 32 lists the items that can be cleared on this screen. When an item is cleared while its contact output is on, the contact output turns off. 10 ◯ 1 ◯ ×3 3 ◯ 2 ◯ Clear mode Other settings can be cleared in the same way on the respective subscreens. 4 ◯ 5 ◯ Cancel 7 ◯ 6 ◯ Clear 8 ◯ 9 ◯ : Flashing Fig. 62 Reset screen navigation Table 32 Reset subscreens No.
5-3-2-6. Setting 1 screen Fig. 63 shows how to navigate the Setting 1 screen and Table 33 lists the items that can be viewed or changed on this screen. 2 ’ ◯ 16 ◯ 1 ◯ × 3 (AGR-21B/22B) × 4 (AGR-31B) 2 ◯ 11 ◯ 4 ◯ 3 ◯ 5 ◯ 6 ◯ 7 ◯ 3 ◯ 9 ◯ 8 ◯ 10 ◯ 8 ◯ 12 ◯ 11 ◯ 11 ◯ 2 ◯ Cancel 13 ◯ Save change 14 ◯ 15 ◯ Setting change mode Other settings can be changed in the same way on the respective subscreens. : Flashing Fig.
Table 33 Setting 1 subscreens No. 1 ○ 2 ○ 2 ’ ○ 3 ○ Subscreen item *1 (Monitor screen) Rated current (L/R characteristic) Rated current (S characteristic) Long time delay trip characteristic (R characteristic) Setting range/Remarks *2 *3 See 5-3-2-3. [ICT] × (0.5-0.63-0.8-1.0) (A) [ICT] × (0.5 to 1.0) (A): Fixed to a single point in increments of 1A SIT-VIT-EIT-3IT-4IT (SIT: I0.02 t, VIT: I t, EIT: I2 t, 3IT: I3 t, 4IT: I4 t) *4 L/R characteristic: [In] × (0.8-0.85-0.9-0.95-1.
5-3-2-7. Setting 2 screen Fig. 64 shows how to navigate the Setting 2 screen and Table 34 lists the items that can be viewed or changed on this screen. 1 ◯ 31 ◯ × 4 (AGR-21B/22B) × 5 (AGR-31B) 2 ◯ 3 ◯ 4 ◯ 5 ◯ 2 ◯ 6 ◯ 7 ◯ 8 ◯ 9 ◯ 6 ◯ 10 ◯ 11 ◯ 12 ◯ 13 ◯ 10 ◯ 14 ◯ 15 ◯ 16 ◯ 14 ◯ 17 - ◯ 19 (from the next page) ◯ 17 (to the next page) ◯ Fig.
14 (to the previous page) ◯ 14 - ◯ 16 (from the previous page) ◯ 18 ◯ 17 ◯ 19 ◯ 17 ◯ 21 ◯ 20 ◯ 22 ◯ 20 ◯ 23 ◯ 24 ◯ 25 ◯ 23 ◯ 26 ◯ 27 ◯ 26 ◯ 2 -◯ 5 (from the previous page) ◯ 2 (to the previous page) ◯ Cancel 28 ◯ Save change 29 ◯ 30 ◯ Setting change mode Other settings can be changed in the same way on the respective subscreens. : Flashing Fig.
Table 34 Setting 2 subscreens No.
5-3-2-8. Maintenance screen Fig. 66 shows how to navigate the maintenance screen and Table 35 lists the items that can be viewed on this screen. 1 ◯ 7 ◯ × 5 (AGR-21B/22B) × 6 (AGR-31B) 2 ◯ 5 ◯ 3 ◯ 4 ◯ 3 ◯ 5 ◯ 6 ◯ 5 ◯ 2 ◯ Fig. 66 Maintenance screen Table 35 Maintenance subscreens No. Subscreen item *1 1 (Monitor screen) See 5-3-2-3.
5-4. OCR Function Check CAUTION z OCR function check and setting changes must be performed by competent persons. z After completion of OCR tests, be sure to return the settings to the original values. Failure to do so may cause a fire or burnout. Use the following procedure to perform OCR function check. 1) Open the ACB and draw out the breaker body to the TEST position. 2) Change settings according to the test as shown in Table 36.
6 ◯ 8 ◯ 3 ◯ 1 ◯ 11 ◯ 7 ◯ 9 ◯ 10 ◯ 2 ◯ ×5 ×6 2 ◯ 4 ◯ 8 ◯ 5 ◯ 2 ◯ 11 ◯ 7 ◯ 10 ◯ 6 ◯ : Flashing 3 ◯ Fig. 67 OCR function check screen navigation Table 37 OCR function check subscreens No. Subscreen item *1 Description 1 (Monitor screen) See 5-3-2-3. ○ 2 (Function check start subscreen) – ○ 3 Long time delay trip "LT" flashes. *2 *3 ○ 4 Short time delay trip "ST" flashes. ○ 5 Instantaneous trip "INST" flashes. ○ 6 Ground fault trip "GF" flashes. ○ 7 OCR + ACB operation "TRIP" flashes.
5-5. Operation Indication and Indication Resetting Procedure 5-5-1. Operation Indication (AGR-11B type) The OCR has LEDs on the front panel to provide operation indications as shown in Fig. 68 and Table 38. It also outputs operation signals to contacts. 1 (Red) ◯ Fig.
5-5-2. Operation Indication and Indication Resetting Procedure (AGR-21B,22B,31B type) The OCR indicates a trip/alarm event on the LCD and provides contact output as shown in Table 39. Pressing the right or left key of the cross button changes the display from "trip/alarm cause" / "fault current/voltage/power" to "operating time" (if applicable). Pressing the MENU button returns the display to the previous screen. (Events saved in the event log can always be displayed on the 01 , □ 11 , maintenance screen.
LCD State Operation Normal operation Line side ground fault protection (REF) When picked up Contact output State When activated After Terminal control No. Normal power is off See Fig. 19 operation for at least 1 sec. – When activated After control power is off for at least 1 sec.
6. MAINTENANCE, INSPECTION AND PARTS REPLACEMENT This chapter describes the maintenance and inspection procedure for the AR series ACBs. The service life of the ACB depends on the working and environmental conditions. The ACB is exposed to mechanical and electrical stresses and thus suffers gradual degradation during use, which will increase the possibility of malfunctions.
6-1. Inspection Procedures CAUTION z ACB maintenance, inspection and parts replacement must be performed by competent persons. z Do not touch ACB current carrying parts and ACB structural parts close to a current carrying part immediately after the ACB trips open. Remaining heat may cause a burn. z Prior to commencing any work on the ACB, open an upstream circuit breaker or the like to isolate all sources of power/voltage from the main and control circuits. Otherwise, electric shock may result.
Table 42 Normal inspection procedure Check point No. 1 General (*1) 2 3 4 Check item Discoloration of conductors Parts missing Damage to parts Dust accumulation Main/control circuit terminals See 2-3. 5 Connections Main/control circuit contacts See 4-2. 6 Surface condition Arc chamber See 6-2-2. 7 Dust accumulation /Damage Main circuit, Arc chamber See 6-2-2. 8 Insulation resistance 9 Surface condition 10 Looseness of screws Control circuit See 6-2-5.
Table 43 Detailed inspection procedure Check point Undervoltage trip device (UVT) See 6-2-1. No. Check item 1 Coil resistance 2 Operation 3 4 5 Length and stroke of plunger Hand connector Looseness of screws Description Disconnect hand connector (red) and, using tester, measure coil resistance between terminals and make sure holding coil is rated at 410 - 510 Ω and attraction coil at 5.6 - 6.8Ω. (*) If not so, replace UVT.
6-2. Parts Replacement Procedure CAUTION z ACB maintenance, inspection and parts replacement must be performed by competent persons. z Do not touch ACB current carrying parts and ACB structural parts close to a current carrying part immediately after the ACB trips open. Remaining heat may cause a burn. z Prior to commencing any work on the ACB, open an upstream circuit breaker or the like to isolate all sources of power/voltage from the main and control circuits. Otherwise, electric shock may result.
(2) Remove the contact block fixing screws as shown in Fig. 70. Contact block fixing screw, Pan head M5 × 10 (2) with spring and flat washers Tightening torque: 2.7 - 3.5 N·m Contact block Fig. 70 Contact block fixing screws (3) Slide the front cover to the left and flip the contact block up as shown in Fig. 71. Front cover Contact block Fig.
(5) Flip the contact block down and slide the front cover to the original position as shown in Fig. 73. Front cover Contact block Fig. 73 Sliding the front cover to the original position (6) Perform manual closing/opening operation of the ACB. Refer to sections 4-1-2 and 4-1-3. (7) Reinstall each part or component in reverse order of removal after inspection. When installing the UVT, make sure the nameplate on the UVT can be viewed from the front of the ACB. z Fig.
6-2-2. Arc chambers The following describes how to replace arc chambers. 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) Carefully lay the breaker body on spacers with the backside down as shown in Fig. 75. The spacers must be at least 7-cm high to prevent deformation of protrusions on the breaker body backside, and have the size and strength that allow the breaker body to be safely laid on them. Take care to keep the main circuit contacts clean of dust.
6-2-3. Stationary contact The following describes how to replace the stationary contact. Fig. 78 shows the general view around the stationary contact. Main circuit contact Stationary contact Mold base Stationary contact tip Moving contact tip Engagement measuring hole Moving contact mounting screw, Hex. socket head M8 × 30 (6-16) (M8 × 25 for AR208S only） with spring washer Tightening torque: 14.
4) Tilt and remove the stationary contact as shown in Fig. 80. (The insulation sheet will be removed at the same time.) If the current sensor and power supply CT hinder the removal of the stationary contact, make a record of the ties for control wires between the current sensor and power supply CT (position/number of ties and type of control wires) using a digital camera, then cut the ties and remove the stationary contact. Restore the ties after replacing the stationary contact.
6-2-4. Moving contact The following describes how to replace the moving contact. 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) Remove the arc chambers and stationary contact. Refer to sections 6-2-2 and 6-2-3. 3) Insert an Allen wrench of a nominal diameter of 5 into each of the Allen wrench holes shown in Fig. 79, turn each moving contact mounting screw two or three turns to loosen, and raise and remove the upper separator shown in Fig. 82.
5) Reinstall each part or component in reverse order of removal after inspection. As to the moving contact-related parts, however, install the spacer, moving contact, upper separator, lower separator, spring washer and moving contact mounting screw in this order, beginning wit the side of insulated operation rod. See Fig. 82.
6-2-5 Latch release coil (LRC) The following describes how to replace the latch release coil (LRC). 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) If the ACB is not equipped with the fixed type undervoltage trip device, turn the cover mounting screws five or six turns to loosen as shown in Fig. 69. If the ACB is equipped with side covers, first remove the side covers and then loosen the front cover mounting screws.
6-2-6. Shunt trip device (SHT) The following describes how to replace the shunt trip device(SHT). 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) Turn the cover mounting screws five or six turns to loosen as shown in Fig. 69. If the ACB is equipped with side covers, first remove the side covers and then loosen the front cover mounting screws. (The cover mounting screws are of captive type and cannot be removed from the side and front covers.
6-2-7. Control relay The following describes how to replace the control relay. 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) If the ACB is not equipped with the fixed type undervoltage trip device, turn the cover mounting screws five or six turns to loosen as shown in Fig. 69. If the ACB is equipped with side covers, first remove the side covers and then loosen the front cover mounting screws.
6) Pull out the OCR as shown in Fig. 90, remove the hand connector(s) above the OCR and place it on the floor. The hand connector(s) below the OCR does not require to be removed. The type and quantity of the hand connectors vary depending on the specification of the ACB. Hand connector OCR Fig. 90 Removing hand connectors 7) Unscrew the contact block mounting screws as shown in Fig. 70 and flip the contact clock up as shown in Fig. 71.
9) Remove the relay retainer shown in Fig. 92 and remove the control relay from the relay base. Relay retainer Control relay Relay seat Fig. 92 Control relay and related parts 10) Reinstall each part or component in reverse order of removal after inspection. Do not forget to install the OCR ground terminal and the relay base ground terminal.
6-2-8. Magnet hold trigger (MHT) The following describes how to replace the magnet hold trigger (MHT). 1) Make preparations for parts replacement. Refer to section 6-2-1. 2) Remove the OCR and the relay base. Refer to items 2) - 8), section 6-2-7. 3) Unscrew the MHT mounting screws shown in Fig. 93, disconnect the hand connector (red), and remove the MHT. Hand connector (red) MHT mounting screw, Pan head M4 × 8 (2) with spring and flat washers Tightening torque: 1.3 - 1.
6-2-9. Auxiliary switches The following describes how to replace auxiliary switches. 1) Make preparations for parts replacement. Refer to section 6-2-1, 1) and 2). 2) If the ACB is equipped with the control terminal block cover, loosen both the cover fixing screws and remove the cover. 3) Remove the auxiliary switch mounting screws shown in Fig. 95. Auxiliary switches Cover fixing screw Auxiliary switch mounting screw, Pan head M4 x 10 (4 - 6) with spring and flat washers Tightening torque: 1.3 - 1.
5) With the operation lever raised, uplift the auxiliary switch unit, pull the shaft lever through the U-notch, and remove the auxiliary switch unit. See Fig. 97. Operation lever Auxiliary switches Shaft lever Fig. 97 Removing the auxiliary switches 6) Reinstall each part or component in reverse order of removal after inspection. When installing the auxiliary switch unit, apply molybdenum grease to the engagement of the operation lever and the shaft lever.
7. TROUBLESHOOTING FLOWCHARTS Figs. 99 - 103 are troubleshooting flowcharts where typical troubles and remedial actions are shown. Yes System alarm occurs Is "SYS2" indicated? No Check operating mechanism See No. 12 in Table 42. Abnormal Remove cause. Normal Yes Is "SYS1" indicated? Check control circuit and MHT. See No. 11 in Table 42 and Nos. 19 – 23 in Table 43. Abnormal Remove cause. Normal Check ACB tripping operation. See No. 27 in Table 43. Abnormal Contact Terasaki.
Is manual closing possible? The ACB cannot be closed. Yes No Does the operation mechanism work well? Yes Do operation indication contacts work well? No Are closing springs charged? Check contacts. See Nos. 9 - 10 in Table 42 and Nos. 6 - 7 in Table 43. No Charge Yes Check the operation mechanism. See No. 12 in Table 42. Move the body to the “CONN.”, “TEST” or “ISOLATED” position. Yes Is manual closing Possible? Unlock Yes Contact Terasaki. Supply correct voltage.
The ACB cannot be opened. Is manual opening Possible? No Check SHT, MHT and UVT. See Nos. 1 - 5, 14 - 23 in Table 43. Contact Terasaki. NG Is electrical opening possible? Supply correct voltage. Yes End No OK Check the control circuit and terminals. See Nos. 5 and 11 in Table 42. Repair/replace OK Yes Check the operation voltage and SHT voltage. NG NG Repair Contact Terasaki. OK Fig.
8.DOOR INTERLOCK Function of the Door Interlock General: The door interlock prevents the switchboard panel from being opened when the ACB is closed, or in the CONNECT or TEST POSITION. The panel door is only operable when the ACB is OPEN and ISOLATED, thus preventing remote operation of the ACB. Normal Function: • When the ACB is CLOSED and in the connected position the draw-out handle cannot be inserted. • When the ACB is OPEN it can be drawn-out to the test or isolated position.
When the handle shutter is at the left of the hole, remove the adjustment plate. This will push against the handle shutter less moving it towards the centre of the hole. When the handle shutter is at the right of the hole, turn the adjustment plate upside down with the double side to the top. This will push against the handle shutter more moving it towards the centre of the hole.
9. MECHANICAL INTERLOCK DEVICE. (HORIZONTAL TYPE) TYPES: AKR-1MH. Group AR2 AR3 AR4 Applicable Breaker Types AR208S, AR212S, AR216S, AR220S AR212H, AR216H, AR220H AR325S, AR332S, AR316H, AR320H, AR325H, AR332H,AR440SB AR440S The mechanical interlock system allows up to three ACBs to be selectively turned on or off to the configured requirement. Please read these instructions carefully to ensure correct operator use.
CAUTION SAFETY: Be sure and read all instructions and associated documents accompanying the product thoroughly to familiarise yourself with the product handling, safety information, and all other safety precautions. Installation Precautions: • Installation work of the interlock must only be carried out by qualified and authorised personnel. • Do not use the interlock in areas that are subject to high temperatures, high humidity, dusty air, corrosive gasses, strong vibration and shock.
Types & Operations TYPE C. TYPE B. TYPE D. TYPE A. • The interlock is enabled in the connected position. When the ACB is in the TEST, ISOLATED or DRAW-OUT Position the interlock is disabled. • If all the ACBs in the interlock system are open and receive a close (on) signal, none will turn on. However, if this occurs there will be momentary continuity between the main circuit and the auxiliary switch A-contact in all the ACBs.
Mounting the ACBs • Before mounting the ACBs check the type of interlock, number and length of the cables to ensure they are as ordered. • Install the ACBs (for fixed type) or chassis (for draw-out type) in the switchboard (see specifications section aformentioned for dimensions). • When installing the ACBs, be sure to locate each ACB as you have specified (i.e. middle, left or right) when ordering. A different arrangement does not permit correct installation of the interlock cables.
Attach the cable in the cable mounting 1 2 Loosen the cable fixing nut and the wire fixing nut. Hole and insert the wire into the wire Insertion hole of the wire fixing bolt. Cable Cable fixing nut Sleeve Wire Temporarily tighten the cable 3 fixing nut. Push in and hold the wire until 4 It stops against the groove end Holding the wire, tighten the 5 Wire fixing nut to a torque of 4.7 to 5.9 N.m. 6 Repeat steps 1 to 5 for the wire on the other end of the cable.
Inspection & Maintenance • If the ACBs are draw-out types, remove the ACB bodies from their chassis. If the ACBs are fixed ensure the ACBs are locked off. • Check the wire fixing nut and cable fixing nut for tightness. If loose, retighten to the specified torque. • Make sure the distance between the support and the lever is as specified. If the distance is out of the specified range, readjust it. • If the ACBs are of a draw-out type, insert the ACB bodies into the chassis to the connected position.
