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DESCRIPTION AND GUIDE TO OPERATIONS

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

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

3 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

4 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

5 GENERAL DESCRIPTION OF THE SWITCHGEAR

6 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

7 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

8 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

9 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)

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

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

12 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

13 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

14 CARRIAGE The carriage bolt lock secures the carriage in the housing

15 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)

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

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

18 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

19 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

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

21 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

22 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

23 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

24 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

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

26 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

27 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

28 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

29 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

30 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

31 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

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

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

34 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

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

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

37 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

38 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

39 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

40 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

41 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

42 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

43 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

44 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

45 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

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

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

48 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

49 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

50 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

51 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

52 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

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

54 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

55 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

56 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

57 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

58 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

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

60 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

61 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

62 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

63 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

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

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

66 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

67 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

68 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

69 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

70 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

71 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

72 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

73 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

74 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

75 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

76 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

77 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

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

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

80 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

81 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

82 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

83 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

84 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

85 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

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

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

88 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

89 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

90 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

91 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

92 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

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

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

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

96 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

97 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

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

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

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

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

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

103 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

104 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

105 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

106 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

107 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

108 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

109 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

110 End of Presentation

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