S&C Mark VI Instruction Sheet Download Page 27

Page: 27 / 28

S&C Instruction Sheet 712-501

Inspection Recommendations

Figure 30. Brake inspection procedure.

Motor shaft square key

Brake

disc

B\zn

socket-head

recess for

adjust ing pad

assembly

Pad

assembly

Brake lever

Angle

bracket

Z\v

–20

Z\v

hex-head

screw

Caliper assembly

DETAIL A

Brake assembly

Spacer-bushing

Hub

Z\v

–20 socket-head set screw

(

Z\,

Allen wrench required)

DETAIL C

Location of motor shaft set screw

(115- & 230-Vac operator only)

Brake lever

Linkage rod

Operating linkage

disconnected from brake lever

B\,

–

C\v

vertical free play

Z\,

–

Z\v

travel

DETAIL B

Measuring brake

lever free play

DETAIL D

Measuring brake

lever stroke

Brake lever at bottom of its stroke (manual operating

handle in cranking position)

Point of initial manual brake release

Brake

disc

Operating linkage

connected to brake lever

B\zn

–18

Z\v

screws

CAUTION

Do not

loosen this

Z\v

–20 screw .

Pad assembly

socket-head set screw

(

C\cx

Allen wrench required)

Motor

Summary of Contents for Mark VI

Page 1: ...t Switcher Position Indication 6 Understanding the Interrupter Indicators 7 Understanding the Gas Pressure Gauge 8 Understanding the Remote Gas Density Indicator 10 Switch Operation Before Operating 11 Closing the Circuit Switcher 12 Opening the Circuit Switcher 13 Opening the Circuit Switcher Using the Optional Manual Trip Device 15 Inspection Recommendations Recommended Inspection Procedures 18 ...

Page 2: ...r Proper Application Ç CAUTION The equipment in this publication is only intended for use in switching and protection of capacitor banks and substation transformers The application must be within the ratings furnished for the equipment Ratings for the Mark VI Circuit Switcher are listed on the ratings label on the side of the Mark VI CS 1A Switch Operator Warranty The warranty and or obligations d...

Page 3: ...ICE NOTICE identifies important procedures or requirements that if not followed can result in product or property damage if instruc tions are not followed Following Safety Instructions If you do not understand any portion of this instruction sheet and need assistance contact your nearest S C Sales Office or S C Autho rized Distributor or call S C Headquarters at 773 338 1000 Monday through Friday ...

Page 4: ...h the manual operating handle The manual operating handle is only intended for use during checkout of the Circuit Switcher when the Circuit Switcher is de energized and isolated SERIOUS INJURY and damage to the Circuit Switcher may result if the manual operating handle is used to operate the Circuit Switcher G 9026 ÇCAUTION G 9024 ÇWARNING DO NOT operate the Circuit Switcher with the manual operat...

Page 5: ...es and flash clothing in accordance with safe operating procedures and rules 4 SAFETY LABELS AND TAGS Do not remove or obscure any of the DANGER WARNING CAUTION NOTICE or labels and tags Remove tags ONLY if instructed to do so 5 ENERGIZED COMPONENTS Always consider all parts live until de energized tested and grounded 6 CIRCUIT SWITCHER POSITION Always confirm the open close position of Circuit Sw...

Page 6: ...ll be open and the interrupters will be closed Closed The integral disconnect will be closed and the interrupters will be closed See the section titled Understanding the Interrupter Indicators starting on page 7 for details on the function of the interrupter indi cators NOTICE The interrupter indicators only indicate the state of the interrupter contacts and DO NOT indicate the state of the entire...

Page 7: ...f the interrupter is OPEN and DIS CHARGED the indicator reads OPEN See Figure 4 During normal operation the interrupter indicators will only read OPEN for a brief moment after the interrupters have tripped before the interrupter charging motors begin closing and charging the interrupters If the manual trip device Catalog Number Suf fix T is furnished the interrupters will read OPEN after a manual ...

Page 8: ...auge needle is in this zone the pole unit is at normal gas density and can be opened and closed See Figure 5 OKTO OPERATE BUT REPLACE This is the yellow zone If the gauge needle is in this zone the interrupter can be opened and closed with full ratings However the inter rupter has lost gas and should be replaced as soon as possible See Figure 6 OKTO OPERATE BUT REPLACE zone Figure 5 Gauge needle i...

Page 9: ... damaged and cannot be relied on to pro vide an accurate indication of gas density The pole unit should be removed from service and replaced promptly Contact your local S C Sales Office Do not operate the Mark VI Cir cuit Switcher NOTICE At temperatures below 31 F 35 C the indicator needle will be in the red zone due to the cold temperature The gas density is below the minimum functional level so ...

Page 10: ...the gas den sity in the interrupter has dropped below the mini mum functional level The interrupter will not maintain full interrupting or dielectric rat ings The interrupter should be removed from service and replaced promptly DO NOT oper ate this Mark VI Circuit Switcher The remote gas density Level 2 alarm con tact opens at 88 of normal density or 65 PSIG at 68 20 C Contacts are normally closed...

Page 11: ...position and tagged or pad locked See Figure 10 c Check that the two pole pull out fuseholder for the motor and space heater if fur nished is inserted See Figure 11 d Check that the switch operator enclosure door is tagged and padlocked in accor dance with standard system operating pro cedures Figure 9 Position indexing drums Figure 10 Manual operating handle tagged and or padlocked Figure 11 Chec...

Page 12: ...e CLOSE push button has not been fur nished Catalog Number Suffix J send a user furnished CLOSE signal to the opera tor The Circuit Switcher disconnect blades will close restoring the circuit Ç WARNING DO NOT operate the Mark VI Circuit Switcher with the manual operating handle while the switch is energized The manual operating handle should only be used during installation and checkout of the swi...

Page 13: ...ol blocking switch Catalog Number Suffix Y opening the push button protective cover pre vents remote operation of the switch operator See Figure 15 Step 7 To trip the Circuit Switcher a Press the OPEN push button for about one second See Figure 15 b If an OPEN push button has not been fur nished Catalog Number Suffix J send a user furnished OPEN signal to the opera tor Ç WARNING DO NOT operate the...

Page 14: ... or con trol circuit setting wait five minutes between OPEN and CLOSE operations NOTICE DO NOT disconnect control power while the Mark VI Circuit Switcher interrupter charging motors are operating The inter rupter charging motors will reset to the beginning of the charging cycle when con trol power is restored which may cause the operation of the blade and interrupter to become unsynchronized If c...

Page 15: ...nnect with the manual operating handle while using the manual trip device Manual operation of the Mark VI Circuit Switcherdisconnectcouldcause alossofelectricalcoordinationbetween the interrupters and disconnect Step 8 Verify that each interrupter is CLOSED and the gas pressure gauge is in the OK TO OPERATE zone See Figure 16 NOTICE Verify the disconnect blade position to determine the OPEN or CLO...

Page 16: ...hen press the manual trip push button located underneath the manual trip device for about one second The standard local trip push button is disabled when control power is not present The manual trip device only retains its charge for about five minutes so press the push button promptly See Figure 18 c All three interrupters will open simulta neously The disconnect WILL NOT open Check that all thre...

Page 17: ...ed lift the push button protective cover of the Mark VI CS 1A Switch Operator e Then press the OPEN push button located on the front of the Mark VI CS 1A Switch Operator for about one second or send a remote trip signal to the operator See Fig ure 20 The disconnect will open and the charging motors will begin charg ing the interrupters Charging takes approximately two minutes ...

Page 18: ...ect bus 5 Check for evidence of excessive terminal pad loading Charging Motor 1 Check for evidence of water ingress damage excessive corrosion or wear 2 Check tightness of fasteners especially at the connection between the motor and the interrupter operating shaft Disconnect Live Parts 1 Check for evidence of damage excessive corrosion or wear especially at the fault closing contacts and current c...

Page 19: ...2 If the switch operator is DECOUPLED operating the manual handle will only operate the motor inside the Mark VI CS 1A Switch Operator the disconnect will remain in its starting position and the inter rupter trip and close circuits are disabled If the operator is in the COUPLED position operat ing the manual operating handle will cause the disconnect blades to open DO NOT operate an energized Circ...

Page 20: ...imate open or closed position has been attained Step 15 After performing your inspection or mainte nance manually operate the Circuit Switcher disconnect blade to its starting position open or closed The switch operator position indi cator seen through the observation window will show when the approximate open or closed position of the disconnect has been attained Step 16 Pull the latch knob on th...

Page 21: ... disconnected and both the opening and closing motor contactors are mechani cally blocked in the open position a Swing the selector handle upright and slowly rotate it clockwise 50 degrees to the decoupled position See Figure 25 During selector handle operation which includes the position at which actual disen gagement or engagement occurs the motor circuit source leads are momentarily disconnecte...

Page 22: ...her interrupter charging motors are operating The inter rupter charging motors will reset to the beginning of the charging cycle when con trol power is restored which may cause the operation of the blade and interrupter to become unsynchronized If control power is lost during operation call your local S C Sales Office To couple a Manually operate the manual operating han dle to bring the disconnec...

Page 23: ...tions c Swing the selector handle upright and rotate it counterclockwise to the coupled position d Lower the handle to engage the locking tab The selector handle is now in the coupled position NOTICE The selector handle may be padlocked in either position ...

Page 24: ...pled position firmly hand crank the disconnect to its fully open position Step 21 Check that the blades open to between 90 and 96 See Figure 28 If the blade does not open 90 to 96 check that the cross base and pole unit base are level and that no shifting of the mounting struc ture has occurred Shim the pole unit base or readjust the height of the support structure as required to level the structu...

Page 25: ...ced current carrying jaw contacts and the blade should rotate with slight pressure against the blade bumper stop and come to rest either on the stop or slightly above it See Figure 29 NOTICE If the blades do not make the correct angle or the contacts are not properly aligned after leveling the disconnect bases halt the inspection and contact your local S C Sales Office Step 23 Manually close the C...

Page 26: ...ead set screw on the side of the caliper assem bly approximately one half turn See Detail A f Then using a B zn Allen wrench rotate the pad assembly clockwise until the free play at the end of the brake lever is B to C v of an inch as shown in Detail B Now tighten the C cx inch pad assembly socket head set screw g Insert the spacer bushing through the angle bracket and brake lever and reattach the...

Page 27: ...d DETAIL C Location of motor shaft set screw 115 230 Vac operator only Brake lever Linkage rod Operating linkage disconnected from brake lever B C v vertical free play Z Z v travel DETAIL B Measuring brake lever free play DETAIL D Measuring brake lever stroke Brake lever at bottom of its stroke manual operating handle in cranking position Point of initial manual brake release Brake disc Operating ...

Page 28: ...Printed in U S A ...

Search results

Summary of Contents for Mark VI

Reviews:

Related manuals for Mark VI

Brands by name

Popular brands

S&C Mark VI, Instruction Sheet

Search results

Summary of Contents for Mark VI

Reviews:

Related manuals for Mark VI

Brands by name

Popular brands