DESCRIPTION AND GUIDE TO OPERATIONS FKI (BRUSH) VSI 11kV SWITCHGEAR DESCRIPTION AND GUIDE TO OPERATIONS

CAUTION! Company Safety Rules must be complied with whilst operating or carrying out work on this equipment Caution notice

Definitions The following standard has been adopted in this presentation. A check action is indicated by Red text and by a Red arrow, for example: Open Circuit Breaker Check status of Neons Information is indicated by Blue text and by a Blue arrow, for example: Definitions Circuit is now de-energised

INDEX SCREEN Click on the link to move to the required section General description of the switchgear Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder circuit Procedure to Remove Earth, Restore a Point of Isolation and CLOSE to ON a Feeder circuit Procedure to obtain Test Access to a Feeder circuit

GENERAL DESCRIPTION OF THE SWITCHGEAR

HORIZONTAL POSITIONING Brush VSI switchgear is an example of transfer earth equipment in which a movable ‘carriage’ or ‘truck’ containing the oil Circuit Breaker and its associated operating mechanism move horizontally between NORMAL SERVICE, CIRCUIT EARTH and BUSBAR EARTH and vertically between ENGAGED and ISOLATED. This first illustration shows the Circuit Breaker carriage raised (ENGAGED) in the NORMAL SERVICE position

HORIZONTAL POSITIONING Before the carriage can be moved horizontally, it must be lowered (manually ‘racked’ down with a handle) to the ISOLATED position. Interlocks prevent this operation unless the Circuit Breaker is OPEN

HORIZONTAL POSITIONING The FEEDER EARTH position is achieved by pushing the carriage further into its housing, then racking it vertically upward. Again, this operation will only be possible if the Circuit Breaker is OPEN. Once the Circuit Breaker is fully raised, it is possible to CLOSE it and apply feeder (circuit) earth safely

FEEDER CIRCUIT BREAKER This shows a typical unit. Protection relays are grouped on the upper panel, electrical controls and indications on the centre panel. The lower panel, hinged on its left hand side, covers the withdrawable Circuit Breaker on its carriage (truck)

CARRIAGE The carriage (truck) comprises the Circuit Breaker, operating mechanism, secondary plug contacts, isolation interlock and carriage interlock

CARRIAGE Note the mechanical status semaphore in the centre of the mechanism box

CARRIAGE POSITION SELECTOR Precise positioning of the carriage between the three possible positions of NORMAL SERVICE, BUSBAR EARTH and CIRCUIT EARTH is obtained by moving a selector located on the right hand wall of the carriage housing. Selector movement should only be attempted with the carriage isolated and fully withdrawn

CARRIAGE POSITION SELECTOR The three carriage positions are also marked on the housing floor – in this illustration the side wall has been omitted allowing the NORMAL SERVICE and BUSBAR EARTH positions to be seen. The rear CIRCUIT EARTH position is obscured

CARRIAGE The carriage bolt lock secures the carriage in the housing

CARRIAGE The isolation interlock prevents racking the Circuit Breaker vertically unless it is in the FREE position and this cannot be selected unless the Circuit Breaker is OPEN (OFF)

CARRIAGE The handle socket interlock prevents movement of the carriage interlock to the LOCKED position unless the racking handle is disengaged

CARRIAGE The handle socket interlock prevents movement of the carriage interlock to the LOCKED position unless the racking handle is disengaged

TRIP BUTTON A mechanical trip button and lockable cover is fitted to the front of the Circuit Breaker mechanism box. The cover will need to be locked when CIRCUIT EARTH is applied

ELECTRICAL OPERATION Circuit Breaker electrical TRIP and CLOSE is controlled by a rotary switch located at the lower centre of the middle panel. This control may be locked if required

MAIN CONTACTS AND SHUTTERS The busbar and feeder isolating contacts with their associated safety shutters are located in the roof of the housing

MAIN CONTACTS AND SHUTTERS Shutters are normally opened automatically as the Circuit Breaker carriage is raised to the ENGAGED position. However it is also possible to open them manually. This illustration shows the Feeder (circuit) shutters opened

MAIN CONTACTS AND SHUTTERS It is also possible to lock either shutter closed. However it is critically important to remove the lock from any shutter that is to open automatically, before raising the Circuit Breaker carriage. Failure to observe this requirement will result in damage that is difficult to repair

TEST PRODS Test probes (prods) are available and should be used with this type of switchgear. Examine them before use to ensure they are in good condition with no loose components

TEST PRODS Test prods are used to make contact with the circuit conductors. Always insert and remove them wearing approved rubber gloves, under safe operational conditions and following the issue of a safety document

Operating Instructions FKI VSI Oil Circuit Breaker Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Ensure that you have selected the correct Circuit Breaker to work on by reference to the nameplate Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the rotary Trip/Close control switch located at the lower centre of the middle panel. Rotate this control anticlockwise to OPEN the Circuit Breaker Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Open the lower panel door and ensure that the Circuit Breaker mechanical semaphore shows OPEN (OFF) Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the isolating mechanism interlock and select it to FREE Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position – the red arrow must align with the ISOLATED mark on the right hand support Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position – the red arrow must align with the ISOLATED mark on the right hand support Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Remove the operating handle Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Remove the operating handle Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the carriage bolt lock and move it to the FREE position Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Withdraw the carriage completely from the housing Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Withdraw the carriage completely from the housing Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Before proceeding further, ensure that all possible back feeds on the circuit have been removed with Points of Isolation established, Safety locks applied and Caution notices posted as required

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Within the housing, identify the busbar shutters and apply a black Safety lock Definitions The Point of Isolation is established

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the carriage positioning selector on the right hand side of the housing and move it to the CIRCUIT EARTH position Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Push the carriage back into the housing until it reaches the limit stop – the carriage will now be further into the housing, compared with the previous NORMAL SERVICE position Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Push the carriage back into the housing until it reaches the limit stop – the carriage will now be further into the housing, compared with the previous NORMAL SERVICE position Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Ensure that the arrow on the right hand carriage support lines up with the CIRCUIT EARTH label on the floor of the housing Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Move the carriage bolt lock to the LOCKED position Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Insert the operating handle and rack the Circuit Breaker upward from the ISOLATED to the ENGAGED position. The red arrow must align with the ENGAGED marker on the right hand support Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Insert the operating handle and rack the Circuit Breaker upward from the ISOLATED to the ENGAGED position. The red arrow must align with the ENGAGED marker on the right hand support Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Remove the operating handle Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Remove the operating handle Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the isolating mechanism interlock and select it to LOCKED Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Identify the rotary Trip/Close control switch located at the lower centre of the middle panel. Rotate this control clockwise to CLOSE the Circuit Breaker Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Ensure that the Circuit Breaker semaphore shows CLOSED (ON). Fit a black Safety lock to the trip button cover Circuit Earth is now applied Definitions

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Definitions Apply a black Safety lock to the Trip/Close control switch located at the lower centre of the middle panel

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Close the lower panel door and post a Caution notice

Operating Instructions FKI VSI Oil Circuit Breaker Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Ensure that you have identified the correct Circuit Breaker. Remove the Caution notice from the lower panel door

Procedure to Open to OFF, establish a Point of Isolation and Earth a Feeder Circuit Ensure that you have identified the correct Circuit Breaker. Remove the Caution notice from the lower panel door

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Open the door and remove the black Safety lock Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Open the door and remove the black Safety lock Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the cover over the mechanical trip button on the mechanism box and swing it aside. Press the button to OPEN the Circuit Breaker Definitions Circuit earth is now removed

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Close the cover Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Ensure that the mechanical semaphore indicates OPEN (OFF) Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the isolating mechanism interlock and select it to FREE Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Remove the operating handle Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Remove the operating handle Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the carriage bolt lock and move it to the FREE position Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Pull the carriage fully out of the housing Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Pull the carriage fully out of the housing Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Within the housing, identify the busbar shutters and remove the black Safety lock. This action is critical! Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Within the housing, identify the busbar shutters and remove the black Safety lock. This action is critical! Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the carriage positioning selector on the right hand side of the housing and move it to the SERVICE position Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the carriage into the housing until the NORMAL SERVICE position is reached Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the carriage into the housing until the NORMAL SERVICE position is reached Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Ensure that the arrow on the right hand carriage support lines up with the NORMAL SERVICE label on the floor of the housing Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Move the carriage bolt lock to the LOCKED position Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the operating handle and rack the Circuit Breaker upward from the ISOLATED to the ENGAGED position – the red arrow must align with the ENGAGED mark on the right hand support Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Insert the operating handle and rack the Circuit Breaker upward from the ISOLATED to the ENGAGED position – the red arrow must align with the ENGAGED mark on the right hand support Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Remove the operating handle Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Remove the operating handle Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the isolating mechanism interlock and select it to LOCKED Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Before proceeding to CLOSE the Circuit Breaker to ON, ensure that any circuit earths that have been applied on the remote end(s) of the circuit have been removed and that operational conditions on the network are satisfactory for a restoration of supply Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the rotary Trip/Close control switch located at the lower centre of the middle panel. Remove the black Safety lock Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Identify the rotary Trip/Close control switch located at the lower centre of the middle panel. Remove the black Safety lock Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Rotate this control clockwise to CLOSE the Circuit Breaker Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Ensure that the Circuit Breaker semaphore shows CLOSED (ON) The circuit is now energised (LIVE) Definitions

Procedure to Remove Earth, Restore a Point of Isolation and Close to On a Feeder circuit Close and secure the lower panel door Definitions

Operating Instructions FKI VSI Oil Circuit Breaker Procedure to obtain Test Access to a Feeder circuit

Procedure to obtain Test Access to a Feeder circuit This procedure must be carried out after the Feeder has been EARTHED and will require issue of a safety document (Sanction for Test). It commences with the Circuit Breaker in the CIRCUIT EARTH position Definitions

Procedure to obtain Test Access to a Feeder circuit Ensure that you have identified the correct Circuit Breaker, which should have a Caution notice posted Definitions

Procedure to obtain Test Access to a Feeder circuit Open the lower panel door and remove the black Safety lock from the mechanical trip button Definitions

Procedure to obtain Test Access to a Feeder circuit Open the lower panel door and remove the black Safety lock from the mechanical trip button Definitions

Procedure to obtain Test Access to a Feeder circuit Identify the cover over the mechanical trip button on the mechanism box and swing it aside. Press the button to OPEN the Circuit Breaker Definitions Circuit earth is now removed

Procedure to obtain Test Access to a Feeder circuit Close the cover Definitions

Procedure to obtain Test Access to a Feeder circuit Ensure that the mechanical semaphore indicates OPEN (OFF) Definitions

Procedure to obtain Test Access to a Feeder circuit Identify the isolating mechanism interlock and select it to FREE Definitions

Procedure to obtain Test Access to a Feeder circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position Definitions

Procedure to obtain Test Access to a Feeder circuit Insert the operating handle and rack the Circuit Breaker anticlockwise downward from the ENGAGED to the ISOLATED position Definitions

Procedure to obtain Test Access to a Feeder circuit Remove the operating handle Definitions

Procedure to obtain Test Access to a Feeder circuit Remove the operating handle Definitions

Procedure to obtain Test Access to a Feeder circuit Identify the carriage bolt lock and move it to the FREE position Definitions

Procedure to obtain Test Access to a Feeder circuit Pull the carriage fully out of the housing Definitions

Procedure to obtain Test Access to a Feeder circuit Pull the carriage fully out of the housing Definitions

Procedure to obtain Test Access to a Feeder circuit Within the housing, check that the busbar shutters are Safety locked. Identify the circuit shutters, painted yellow and open them Definitions

Procedure to obtain Test Access to a Feeder circuit Test that the contacts are DEAD using an approved voltage testing device, which must itself be tested both before and after use Definitions

Procedure to obtain Test Access to a Feeder circuit Test that the contacts are DEAD using an approved voltage testing device, which must itself be tested both before and after use Definitions

Procedure to obtain Test Access to a Feeder circuit Test that the contacts are DEAD using an approved voltage testing device, which must itself be tested both before and after use Definitions

Procedure to obtain Test Access to a Feeder circuit Test probes (prods) are stored in a wooden case inside the substation. Examine them before use to ensure they are in good condition with no loose components

Procedure to obtain Test Access to a Feeder circuit Insert the test probes Definitions Circuit testing may now proceed, wearing approved rubber gloves and following approved procedures

Procedure to obtain Test Access to a Feeder circuit On completion of testing, remove the test prods and return them to storage. If it is required to RESTORE CIRCUIT EARTH or to RESTORE to ON, follow the procedures specified elsewhere in this presentation. If RESTORING to ON, first remove the Caution notice from the lower panel door, then ensure that operational conditions on the circuit are safe to allow energizing, including the removal of any additional earths that may have been applied Definitions

End of Presentation