6065 10
6065 10
6065 10
June 2002
Instruction Bulletin Smyrna, TN, USA
POWERSUB™
Vacuum Substation
Circuit Breaker, Type FVR
15 kV to 38 kV,
110 kV BIL to 150 kV BIL,
1200 A to 4000 A,
Class 6065
6065-3001
NOTICE Read these instructions carefully and look at the equipment to become
familiar with the device before trying to install, operate, or maintain it. The
following special messages may appear throughout this bulletin or on the
equipment to warn of potential hazards or to call attention to information that
clarifies or simplifies a procedure.
The addition of either symbol to a “Danger” or “Warning” safety label
indicates that an electrical hazard exists which will result in personal injury if
the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.
DANGER
DANGER indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not
avoided, can result in death or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not
avoided, can result in minor or moderate injury.
CAUTION
CAUTION, used without the safety alert symbol, indicates a potentially
hazardous situation which, if not avoided, can result in property damage.
PLEASE NOTE Electrical equipment should be installed, operated, serviced, and maintained
only by qualified electrical personnel. This document is not intended as an
instruction manual for untrained persons. No responsibility is assumed by
Square D for any consequences arising out of the use of this manual.
Bulletin No. 6065-10 POWERSUBTM Vacuum Substation Circuit Breaker, Type FVR
June 2002 Contents
SECTION 7—MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
General Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Insulating Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Vacuum Interrupters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Contact Erosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
E-Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Contact Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hi-Pot (Dielectric) Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Resistance Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Lubrication Intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Lubrication Points During Maintenance Period . . . . . . . . . . . . . . 30
SECTION 8—REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Ordering Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SECTION 9—MAINTENANCE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SECTION 1—INTRODUCTION This bulletin contains instructions for installation, operation, and
maintenance of the POWERSUB™ Type FVR series circuit breakers (up to
150 kV BIL) manufactured by Square D.
It is important to read and understand this bulletin completely before
performing the installation, operation, and maintenance steps provided.
Electrical equipment should be installed and serviced only by qualified
personnel. Qualified personnel should establish procedures that ensure the
safety of personnel and equipment.
The Type FVR circuit breaker is designed for outdoor substation applications
and provides interrupting capability for medium voltage systems up to 38 kV.
Circuits in which these circuit breakers are placed are capable of
overvoltages. Complex medium voltage systems may require a detailed
overvoltage system analysis and the addition of overvoltage protection.
All Type FVR circuit breakers except those rated at or above 3000 A have
been designed with an arc-resistant enclosure. The 4000 A rating requires
the use of a fan circuit.
Catalog Numbers The following is an explanation and sample of the catalog numbering
scheme:
Catalog Number—FVR 1 12 11 16 A
Series Designation
Interrupting Rating
BIL Rating
Continuous Current Rating
Voltage Class
60653039
Type
Continuous
Voltage Interruption Series
Type Current BIL Rating
Class Rating Designation
Rating
06 = 600 A
12 = 12 kA
08 = 800 A
16 = 16 kA
1 = 15 kV 12 = 1200 A 11 = 110 kV
20 = 20 kA
FVR—Vacuum 2 = 27 kV 20 = 2000 A 12 = 125 kV A
25 = 25 kA
3 = 38 kV 30 = 3000 A 15 = 150 kV
31 = 31.5 kA
35 = 3500 A
40 = 40 kA
40 = 4000 A*
* = Fan cooled
Receiving Upon receipt, check the packing list against the equipment received to
ensure the order and shipment are complete. Claims for shortages or errors
must be made in writing to Square D within 60 days after delivery. Failure to
give such notice will constitute unqualified acceptance and a waiver of all
such claims by the purchaser.
Immediately inspect the equipment for any damage which may have
occurred in transit. If damage is found or suspected, file a claim with the
carrier immediately and notify Square D. Delivery of equipment to a carrier at
any of the Square D plants or other shipping points constitutes delivery to the
purchaser regardless of freight payment and title. All risk of loss or damage
pass to the purchaser at that time.
For details concerning claims for equipment shortages and other errors, refer
to Square D “Terms and Conditions of Sale”.
Handling Lifting eyes (see Figure 1 on page 9) are provided on the roof of the Type
FVR circuit breaker for lifting by crane. No spreader bars are required.
Handle the equipment with care. Protect the bushings from rough treatment
to avoid chipping.
If lifting the circuit breaker by forklift, place the forklift forks underneath the
low voltage compartment (see Figure 1 on page 9) and secure the circuit
breaker to the forklift with a strap. The floor of the low voltage compartment
is reinforced to support the weight of the circuit breaker. Do not lift by the side
vent housings or any other protrusions. If another handling method is
necessary, contact Square D to make special preparations.
WARNING
TOP HEAVY LOAD
If lifting the circuit breaker by forklift, stabilize the circuit breaker with a
safety strap to reduce the possibility of tipping.
Failure to follow this instruction can result in death or serious
injury.
CAUTION
DO NOT LIFT CIRCUIT BREAKER BY SIDE VENT HOUSINGS
Damaged vent housings can constrict proper air flow and expose interior
of high voltage compartment to weather.
Failure to observe this instruction can result in injury or equipment
damage.
View the OPEN-CLOSED indicator (see Figure 5 on page 13) to verify the
mechanism/breaker position. The Type FVR circuit breaker is shipped with
the breaker in the closed position.
Storage If the circuit breaker must be stored before operation, keep it in a clean, dry,
corrosion-free area protected from damage. Inspect the circuit breaker
regularly when stored for prolonged periods.
NOTE: The Type FVR circuit breaker is equipped with strip heaters that must
be energized during storage to prevent condensation within the circuit
breaker housing. Verify that the heater thermostat is set at 75 °F (24 °C).
Identification The rating nameplate is located on the inside of the rear low voltage door and
includes the following information:
• Catalog Number
• Weight (lbs)
• Rated Max. Voltage (kV RMS)
• Reclosing time (cycles)
• Duty Cycle (O–CO–15 Seconds–CO)
• Closing Coil Voltage
• Serial Number
• Factory Order Number
• Rated Frequency (hz)
• Full Wave BIL (kV Pk)
• Charging Motor Voltage
• Manufacture Date
• Maintenance Manual Number
• Interrupt Time (cycles)
• 1 Minute Withstand (kV RMS)
• Rated Short Circuit (kA RMS)
• Spare Aux. Switch Contacts
• Customer PO Number
• Control Diagram Number
• Closing Time (cycles)
• Close and Latch (kA RMS)
• Tripping Coil Voltage
SECTION 4—DESCRIPTION The Type FVR circuit breaker enclosure contains two separate
compartments; a high voltage compartment (see Figure 1) and a low voltage
compartment (see Figure 1).
Bushing studs
Roof bushings
Lifting eye
Vent lid
High voltage
compartment Vent housing
(Fan location
for 4000 A
breakers.)
Ground pads
Manual trip knob
Viewing window
Low voltage
compartment
Adjustable legs
60559501
Galvanized
base channel
Figure 1: 110 kV BIL to 150 kV BIL, Type FVR Vacuum Circuit Breaker,
Front View
Fan Cooling Circuit Added cooling capacity is required on 4000 A breakers when the primary
(4000 A circuit breakers only) current exceeds 3600 A. A fan (FM1 & FM2) is mounted in each vent housing
(see Figure 1) to create additional airflow required for cooling the breaker. A
selector switch (SS) mounted to the right of the mechanism; is used to select
automatic or manual mode of operation. For fan operation instructions see
“Fan Operation (4000 A circuit breakers only)” on page 20.
The fan cooling circuit consists of:
— fan control current transformer (CT)
— current sensing relay (CSR)
— fan control relay (CR)
— fan test switch
— fan alarm circuit
— alarm time delay
— air flow switches (FS1, FS2)
Fan Control Current Transformer (CT) :With the selector switch (SS) in the AUTO position, a separate 4000/5 current
transformer senses the primary current and controls the fan operation. This
current transformer (CT) is mounted on the number 4 bushing.
Current Sensing Relay (CSR) With the selector switch (SS) in the AUTO position, the current sensing relay
monitors the secondary current of the current transformer (CT). The relay
opens its normally closed output contact when the primary current exceeds
3600 A. When the primary current reaches 3240 A, the relay drops out
shutting off the fan circuit.
NOTE: Do not alter the settings of this relay.
Fan Control Relay (CR) With the selector switch (SS) in the AUTO position, the normally energized
fan control relay (CR) is de-energized when the current sensing relay's
normally closed output contacts open. The (CR) relay applies control power
to both fans through its normally closed contacts. The (CR) relay also has an
"off" time delay contact which is used in the Customer's Alarm Circuit.
Fan Test Switch (TF) This push button switch activates the fans if pressed while the selector switch
(SS) is in the "auto" position. This test will verify the fan control relay circuitry
is operating correctly.
Fan Alarm Circuit This circuit is used to detect any malfunction in the operation of the fan circuit.
The fan alarm circuit contacts close when either of the two fans fail to activate
the flow switch. Connect this circuit to an alarm or light to warn against
insufficient airflow. The circuit consists of two airflow switches (FS1 & FS2)
which are located in the airflow path of each blower. These switches are
connected in series with the "off" time delay contact of the control relay (CR).
This circuit functions in both the "automatic" and "manual" mode.
Alarm Time Delay When initially energized, the fans require a few seconds to develop enough
airflow to actuate their respective air flow switches (FS1 & FS2). To avoid a
false alarm during start-up periods, the "off" time delay contacts on the
control (CR) relay blocks the alarm circuit briefly. This delay (10 seconds)
gives the fans time to build adequate airflow to activate the switches.
Air Flow Switches (FS1, FS2) Each airflow switch contains a set of normally closed contacts that are wired
into the Customer Alarm Circuit. If the switch is not activated by the airflow
from the fan, the signal is sent to the alarm circuit.
X1
NOTE: The SS Selector Switch is shown in
the AUTO position. All other contacts are CT
shown with relays de-energized. X2 4000/5A
B2 C
CSR
SS SS TF
FU
TA-F1 F1/10A
2 5 6 1 2
1 2 1
1 2 15
CR CR CSR
1A 2A 16
3 4 3 4 A1 A
F1/10A
FU
CH1-1 CH3-1 OFF
CSR DELAY CR
120 VAC
60 Hz PH1-1 PH3-1 A2 B
FM1 FM2
PH1-2 PH3-2
CH1-2 CH3-2
TBF-1
TA-F2
CR/TD
10 SEC CH2-2 FS1 CH2-1 TBF-3 TA-F3
COM NC
13A 13
PH2-2 PH2-1
TBF-4 TA-F4
LEGEND
CSR Current Sensing Relay CT Current Transformer
FM1 Fan Motor (Left) SS Auto/Manual Selector Switch
FM2 Fan Motor (Right) TBF Fan Control Terminal Block
CR Fan Control Relay FU Fuse
TF Test Fan Pushbutton PH Disconnect Male PLug Housing
FS1 Air Flow Switch (Left) CH Disconnect Female PLug
60653040
Figure 2: Typical Fan Control Schematic, 4000 A Circuit Breaker, (refer to customer order drawings for actual
schematic)
High Voltage Compartment The primary circuit connection to the circuit breaker is made through the roof
bushings (see Figure 1 on page 9) located on the top of the high voltage
compartment.
Vacuum Interrupters Vacuum interrupters (see Figure 3), mounted horizontally within the high
voltage compartment, perform interruption in a Type FVR circuit breaker. The
vacuum interrupters consist of a pair of contacts—one contact is movable
and one contact is fixed. The vacuum interrupters require only a short gap to
provide the dielectric withstand capability of the interrupter.
Vacuum interrupter
60653003
Figure 3: Vacuum Interrupter Assembly
NOTE: Some vacuum interrupter assembly equipment shown in Figure 3
may vary on circuit breakers.
Current Transformers When specified by the customer, current transformers (see Figure 4) are
mounted around the bushings on the inside of the roof. Current transformer
(CT) circuit wiring extends from the CT case to the shorting type terminal
blocks located in the low voltage compartment. The CTs are selected based
on the electrical needs of each application.
Current transformers
Bushing
60653004
Vent deflector
Flex connector
Crossbar
Crossbar stops
Low Voltage Compartment The operating mechanism, indicators, controls, relays, meters and
miscellaneous accessories are housed within the low voltage compartment.
Operating Mechanism The Type FVR circuit breaker uses a stored-energy operating mechanism
(see Figure 5) in which charged springs open and close the circuit breaker.
The operating mechanism contains all controls and interlocks. The
mechanism is mounted in the low voltage compartment so it can be
accessed easily for inspection and servicing.
NOTE: To remove the mechanism cover (see Figure 5), carefully unclip the
back of the cover from the mechanism frame.
Opening springs
Gear box
Motor limit switch
(obstructed from view)
Drive bar
CHARGED-DISCHARGED indicator
OPEN-CLOSED indicator
Counter
Mechanism cover
OPEN pushbutton
Auxiliary switches
Manual trip reset switch (69 switch)
Closing Springs The closing springs (see Figure 5 on page 13) close the circuit breaker when
the CLOSE pushbutton is pressed or when the closing coil is energized.
These springs are charged (compressed) either manually with the charging
handle or electrically by the spring charging motor.
When control power is applied to the circuit breaker, the spring charging
motor is energized. The charging motor turns the gears that drive the ratchet
assembly up and down.
The ratchet assembly (see Figure 9 on page 19) rotates the drive shaft
compressing the closing springs. As the spring loads pass top-dead center,
the drive shaft rotates a few degrees until the closing latch roller engages the
closing latch. The drive shaft can rotate no further; the closing springs are
Opening Springs The opening springs (see Figure 5 on page 13) open the circuit breaker when
the OPEN pushbutton is pressed or the trip coil is energized. These springs
are charged (compressed) whenever the circuit breaker is in the closed
position.
Control Circuit A typical schematic diagram for the control circuit of the Type FVR circuit
breaker is shown in Figure 6 on page 15. A copy of the exact schematic
diagram(s) and wiring diagram(s) for the circuit breaker are located in the
manual holder on the rear door of the low voltage compartment. The
remaining paragraphs in this section discuss the function of the control circuit
components.
• Motor Limit Switch
The motor limit switch (see Figure 5 on page 13) energizes the spring
charging motor when a closing spring charging operation is required. In
turn, it de-energizes the spring charging motor when the closing springs
are fully charged. The motor limit switch is connected to the spring
charging motor. When the closing springs are in the discharged position,
the motor limit switch cam actuates the motor limit switch. This energizes
the motor and disables the closing coil. Once the closing springs are
charged fully, the cam allows the switch to open, de-energizing the spring
charging motor.
• Spring Charging Motor
When energized by the closing of the motor limit switch, the spring
charging motor (see Figure 5 on page 13) drives the series of connected
gears and cam. The cam then raises and lowers the ratchet assembly and
rotates the drive shaft. As the drive shaft rotates, the closing springs
compress to the charged position. When the closing springs are fully
charged, the motor limit switch contacts open, de-energizing the spring
charging motor.
8C 15 A
(+)
1 3 5
5 41
G R
CS/C CS/T
5 7 13 15 9
1
69
3
1 4
52/Y 52/a
3
5 4
52/LS 9 13 15 11
6 52/b 6 7 52/b 52/a 52/a
10 52/Y 52/a 14 16 12
8 8
AC/DC 2
SOURCE 9
1 52/LC
1
52/M
1
2 52/LS
2 1
2
52/TC
52/Y
1 7 2
52/CC
2
4 6 14 16 10
2 4 6
(-)
15 A Motor Close Coil Breaker Status T
rip Coil
Circuit Circuit Open Circuit
Heater Circuit
8H/10A 23
35 1 3 LEGEND
LEGEND
HTR 52/M Spring Charging Motor 52/LC Latch Check Switch
240 Vac
52/Y Anti-pump Relay 52/LS Motor Limit Switch
CS Circuit Breaker Control Switch 52/CC Close Coil
HTR
Auxiliary Switch 52//TC Trip Coil
52/a
(Open When Circuit Breaker is Open) 8C Control Power Switch
36 2 4
(Each heater rated 240 V, 500 W) Auxiliary Switch Manual Trip Reset Switch
52/b 69
(Closed When Circuit Breaker is Open) (69 switch)
23 Heater Thermostat 8H Heater Power Switch
60553008
• Auxiliary Switch
The auxiliary switch (see Figure 5 on page 13) is a multi-stage switch used
to operate circuits that are dependent upon the position of the circuit
breaker contacts. The schematic diagram indicates how each of the
auxiliary switch stages interconnect with the circuit breaker circuitry. The
following describes the function of each stage:
— The two sets of a-type contacts, connected in series with the trip coil
(52/TC), de-energize the trip coil when the circuit breaker is in the
open position.
— The b-type contact, connected in series with the closing coil (52/CC),
de-energizes the closing coil when the circuit breaker contacts are in
the closed position.
— For user convenience additional a- and b-type contacts are included
for optional use.
• Trip and Close Coils
The trip and close coils (see Figure 5 on page 13) are located in the lower
center of the operating mechanism. When energized, these coils release
the open or close latches located inside the mechanism.
• Anti-Pump Relay
An anti-pump relay (see Figure 7 on page 17) is provided to inhibit multiple
close-open operations in the event that a continuous close signal is
applied. The circuit breaker will not reclose until the closing signal is
removed and then reapplied.
The circuit breaker control switch (see Figure 6 on page 15) energizes the
closing coil when turned to the closed position. If this switch remains
closed, the anti-pump relay prevents the closing springs from being
continuously charged and discharged. The anti-pump relay performs this
function by only allowing the closing coil to be energized if:
— The control switch is closed.
— The closing springs have reached the fully charged position.
— The spring charging motor has been de-energized.
• Latch Check Switch
The latch check switch (see Figure 5 on page 13) allows the circuit breaker
to be used for reclosing applications. When the trip latch moves out of its
normal position, it activates the latch check switch. The closing circuit
cannot be energized until the trip latch fully returns to its normal position
and the mechanism is in position to allow a close operation.
• Heater Circuitry
In normal configurations, two strip heaters (see Figure 7) are mounted at
the lower rear of the operating mechanism to reduce condensation. For
colder temperatures, two additional strip heaters are mounted in the upper
portion of the low voltage compartment. In some applications, higher
wattage heaters may be used.
• Heater Power Switch
When opened, the heater power switch (see Figure 6 on page 15)
completely disconnects the heater circuitry from the control power.
• Thermostat
The thermostat controls the temperature within the circuit breaker
housing. The thermostat is shipped set at 75 °F (24 ºC) and should not be
field adjusted.
60659507
Shock absorber
Strip heaters
Terminal Heater
blocks thermostat
Anti-pump relay
Conduit
access plate
Vent/filter
Low Voltage Instrument Door (Optional) When specified by the customer, Type FVR circuit breakers are equipped
with an instrument door located inside the rear door of the low voltage
compartment. This panel allows for local electrical operation of the circuit
breaker.
The low voltage instrument door has indicator lights and a circuit breaker
control switch. The low voltage instrument door can be customized to include
auxiliary components when specified by the customer. Refer to auxiliary
component manufacturer’s instruction materials for proper operation of
devices not included in this manual.
Indicator lights
Circuit breaker
control switch
60653022
Indicator Lights Red (closed) and green (open) indicator lights (see Figure 8) located on the
low voltage instrument door indicate the status of the circuit breaker.
Circuit Breaker Control Switch The circuit breaker control switch (see Figure 8) allows local operation of the
circuit breaker without direct exposure to the low voltage compartment.
SECTION 5—OPERATION
WARNING
HAZARD OF ELECTRIC SHOCK, BURN, OR EXPLOSION
Only qualified personnel familiar with medium voltage circuits should
operate this equipment.
Failure to follow this instruction can result in death or serious
injury.
Charging the Closing Spring The closing springs—located on the left side of the mechanism—can be
charged manually by moving the charging handle up and down or electrically
with control power. The closing springs are fully charged when the
CHARGED/DISCHARGED indicator reads CHARGED and the charging
handle can no longer be raised.
When control power is applied to the circuit breaker, the spring charging
motor will be energized automatically. As the motor gears (see Figure 9) turn,
the drive shaft rotates, compressing the closing springs until the spring loads
pass top-dead center. At this point, the closing roller engages the closing
cam. The drive shaft can rotate no further and the motor limit switch de-
energizes the spring charging motor. The closing springs are held in this
charged position until a closing operation is initiated.
Closing Operation After charging the springs, close the circuit breaker by pressing the CLOSE
pushbutton or energizing the closing coil electrically.
The CLOSE pushbutton releases the closing spring latch and allows the
closing springs to discharge. The mechanism linkages force the drive bar
upward, which, in turn, pushes the crossbar (see Figure 4 on page 12)
upward. The crossbar then drives the pushrods inward, closing the vacuum
interrupter contacts.
Motor gears
Drive shaft
Ratchet assembly
Opening Operation The opening springs become charged (or compressed) automatically when
the circuit breaker is in the closed position. If the OPEN pushbutton is
pressed or the trip coil is energized, the mechanism releases the opening
latch and allows the opening springs to discharge. The opening springs pull
the crossbar downward, opening the vacuum interrupter contacts.
Mechanical Operation The circuit breaker can be opened (tripped) mechanically either by the
external manual trip knob (see Figure 1 on page 9) or the OPEN pushbutton
located on the operating mechanism inside the low voltage compartment
(see Figure 5 on page 13). The external manual trip knob allows the circuit
breaker to be manually tripped without requiring entry through the low
voltage compartment door.
Electrical Operation The circuit breaker can be opened electrically by the breaker control switch
located on the low voltage instrument door (see Figure 8 on page 18).
When a manual trip operation is performed, the manual trip reset switch (69
switch) opens automatically, disabling the closing circuit. The manual trip
reset switch, located directly under the operating mechanism (see Figure 5
on page 13), needs to be manually reset before an electrical closing
operation can occur. To reset the manual trip reset switch follow the steps
below:
Fan Operation (4000 A circuit breakers only) The fan circuit for 4000 A circuit breakers can be operated either
automatically or manually.
Automatic Operation With the selector switch (SS) in the AUTO position, the fans turn on
automatically when the primary current exceeds 3600 A. The fans shut off
when the primary current drops below 3240 A. To minimize fan wear, operate
the fan controls in the automatic mode.
Manual Operation If there is a problem with the automatic controls, the selector switch (SS)
may be placed in the "manual" position. This position will connect the
control power directly to the fans. The fans operate continuously in the
manual mode.
SECTION 6—INSTALLATION
Foundation The Type FVR circuit breaker is designed for installation on a concrete pad.
The pad must be flat, level, and free of debris for proper operation.
*110/125 kV BIL
**150 kV BIL
in.
Dual measurements
(mm)
Lifting the Circuit Breaker Lifting eyes (see Figure 1 on page 9) are provided on the roof of the
Type FVR circuit breaker for lifting by crane. No spreader bars are required.
Handle the equipment with care.
If lifting the circuit breaker by forklift, place the forklift forks underneath the
low voltage compartment (see Figure 1 on page 9) and secure the circuit
breaker to the forklift with a strap. The floor of the low voltage compartment
is reinforced to support the weight of the circuit breaker. Do not lift by the side
vent housings or any other protrusions. If another handling method is
necessary, contact Square D to make special preparations.
WARNING
TOP HEAVY LOAD
If lifting the circuit breaker by forklift, stabilize the circuit breaker with a
safety strap to reduce the possibility of tipping.
Failure to follow this instruction can result in death or serious
injury.
CAUTION
DO NOT LIFT CIRCUIT BREAKER BY SIDE VENT HOUSINGS
Damaged vent housings can constrict proper air flow and expose interior
of high voltage compartment to weather.
Failure to follow this instruction can result in equipment damage.
Grounding Connect the circuit breaker ground pads (see Figure 1 on page 9) to the
substation grounding grid. Use the ground pad hardware provided.
Before connecting the Type FVR vacuum substation circuit breaker to the
primary circuit, prepare it for operation as follows:
1. Check the indicators to verify that the circuit breaker is in the open
position with all springs discharged. If it is not in this position, press the
OPEN pushbutton, the CLOSE pushbutton, and then the OPEN
pushbutton (see Figure 5 on page 13).
NOTE: The circuit breaker is normally shipped in the closed position.
2. Examine the entire circuit breaker for damage, dirt, and moisture.
3. Use a clean, dry cloth to remove dirt and moisture that may have
collected on the insulating parts.
4. Cycle the circuit breaker manually several times, checking for proper
operation. To do so, move the charging handle (see Figure 5 on page 13)
up and down until the closing springs are fully charged. A full charge is
indicated when the charging handle can no longer be raised and the
CHARGED-DISCHARGED indicator reads “charged”. Close the circuit
breaker by pressing the CLOSE pushbutton, and then open it by pressing
the OPEN pushbutton.
5. Verify that the heater thermostat (see Figure 7 on page 17) is set at 75 °F
(24 °C).
6. Inspect and remove all loose parts, tools, and miscellaneous construction
items left inside the circuit breaker before the power is energized.
7. Replace all doors and covers and fasten them securely. For arc-
resistant protection all doors must be closed and covers installed.
Arc-Resistance All Type FVR circuit breakers except those rated at or above3000 A have an
arc-resistant enclosure. For proper operation of this feature, the following is
required:
Vent covers
60553013
Figure 11: Vent Covers
• Ensure vent deflectors (see Figure 12) are installed and in good repair.
Vent deflectors are part of the high voltage side sheets. They are used to
fold into the vent housing forcing the exhaust through the vent lids (see
Figure 13) if an arc occurs. If these parts are removed or broken during
shipment, a replacement should be ordered.
Vent deflector
60653004
Vent lid
60659509
Cable Connection The Type FVR circuit breaker is connected to the primary circuit through
aerial lugs which are not included unless specified by the customer. Follow
the instructions below when attaching the aerial lugs to the circuit breaker
bushing studs.
CAUTION
HAZARD OF EQUIPMENT DAMAGE
BE CAREFUL NOT TO OVERTIGHTEN. It is critical that the aerial lug is
not overtightened. Always loosen the aerial lug counter-clockwise to align
the lug pad properly.
Failure to follow this instruction can result in equipment damage.
Pre-Operation Tests
DANGER
HAZARD OF ELECTRIC SHOCK, BURN, OR EXPLOSION
When performing the hi-pot (dielectric) test:
• Do not exceed the voltages specified in Table 2.
• Keep all persons at least 6 ft (1.8 m) away from the circuit breaker
being tested.
• Discharge the bushings and vacuum interrupter mid-band rings to
ground after each test. These areas can retain a static charge after a
hi-pot test.
Failure to observe this instruction will result in death or serious
injury.
WARNING
HAZARD OF RADIATION (X-RAY) EXPOSURE
This device may emit x-rays if voltage higher than rated maximum is
applied across the open contacts, or if contacts are spaced less than
rated stroke. In such a case, personnel must be protected with
appropriate shielding.
Failure to follow this instruction can result in death or serious
injury.
4. Verify that the circuit breaker sustains the specified voltage without
flashover for one minute. If it does not, inspect the insulators for leakage
paths. If necessary, clean the surface of each insulator and repeat steps
1–3. If test results continue to differ from target values, DO NOT place the
equipment into service and contact your Square D field sales
representative.
5. After each hi-pot test, discharge the bushings and vacuum interrupter
mid-band rings to ground.
SECTION 7—MAINTENANCE
DANGER
HAZARD OF ELECTRIC SHOCK, BURN, OR EXPLOSION
• This equipment must be installed and serviced only by qualified
personnel.
• Turn off all power supplying this equipment before working on or
inside.
• Always use a properly rated voltage sensing device to confirm that
power is off.
• Replace all devices, doors, and covers before turning on the power to
this equipment.
• All maintenance must be performed in accordance with local codes
and under the following conditions:
— The circuit breaker must be isolated from all power sources.
— Control voltage must be removed from the controls.
— The circuit breaker must be in the open position.
— All circuit breaker springs must be discharged.
• All instructions in this manual are written with the assumption that the
customer has taken these measures before performing maintenance
or testing.
• Open the circuit breaker and discharge all springs by pressing the
OPEN and CLOSE pushbuttons in the order OPEN-CLOSE-OPEN.
• Qualified personnel should establish procedures that ensure the
safety of personnel and equipment.
Failure to observe this instruction will result in death or serious
injury.
General Inspection Visually inspect the entire circuit breaker and operating mechanism for loose
parts or connections. Examine the circuit breaker for evidence of overheating
or excessive dirt or moisture. If such evidence is found contact your
Square D field sales representative.
Insulating Surfaces Use a clean, dry cloth to remove all dirt and moisture from the outside of the
vacuum interrupters and from all insulating parts.
Air Filters Thoroughly clean or replace the air filters. Air filters (see Figure 14) are
located on the floor of the low voltage compartment, inside the side vent
housings, and on the floor of the high voltage compartment in circuit breakers
rated at or above 3000 A. Install air filters correctly for proper air flow.
NOTE: To maintain proper air flow, replace only with identical filter elements.
Vacuum Interrupters NOTE: This topic is included for information only. Adjustments to a new
circuit breaker are not necessary, nor are they required for routine
maintenance.
Contact Erosion Contact erosion is the difference between the E-gap currently measured and
the initial E-gap factory measurement. When contact erosion exceeds
approximately 0.12 in. (.305 mm), the vacuum interrupter needs to be
replaced. Contact Square D for replacement procedure.
E-Gap To measure E-gap (see Figure 15), place the circuit breaker in the closed
position. The nominal E-gap settings for a vacuum interrupter assembly are
shown in Table 3. The actual end-of-life E-gap is shown on a label mounted
to the floor of the high voltage compartment.
* End-of-life E-gap settings shown in Table 3 are nominal. For actual end-of-life E-gap
measurements refer to label mounted to the floor of the high voltage compartment.
Molded pushrod
Bias spring
Standard pin
gauge
60659511
Contact Gap The contact gap dimension is recorded on the label mounted to the floor of
the high voltage compartment and is provided for reference purposes only.
Hi-Pot (Dielectric) Test Hi-pot (high potential) tests need to be performed as part of a series of
pre-operational tests (see “Pre-Operation Tests” on page 26), regular
maintenance, and as a method of determining adequacy against breakdown
of insulating materials and spacings under normal conditions. Consistent
unacceptable test results may indicate a loss of vacuum. Contact Square D
for technical assistance.
Resistance Measurement The resistance measurement from the line side bushing to the load side
bushing should not exceed the values shown in Table 4. Readings exceeding
these values using a micro-ohmmeter indicates a high resistance. Either a
loose connection exists or the vacuum interrupter needs to be replaced.
Contact Square D for replacement procedure.
60553041
Rear riser
Front riser
Vacuum interrupter
Bottle clamp
Molded pushrod
Pivot block
Nylock nut
Lubrication Use Mobil 28® red grease, Square D part number 1615-100950, or
equivalent. Always wipe the area clean before applying new lubricant.
Lubrication Intervals Under normal conditions, lubricate after two years or 2000 operations
(whichever occurs first). More adverse conditions may require more frequent
lubrication intervals and different procedures. Variations should be based on
the experience of the operating company.
Lubrication Points During Maintenance Period The points listed below require lubrication during maintenance.
— Gear teeth
— Spring guides
— Contact surfaces on guide cams,trip and close latch
— Charging lever connecting arm
— Shock absorber guide slots
— Pushrod guide slots
For detailed pictures of each lubrication point, see instruction bulletin 6065-15.
SECTION 8—REPLACEMENT PARTS Table 6 lists factory-recommended replacement parts. Each replacement
part is shipped with complete assembly and adjustment instructions.
Replacement
Description Rating
Kit Number
Air Filters
46011-680-50 1200 A/2000 A
High Voltage Compartment
Air Filters
46011-681-50 1200 A/2000 A
Low Voltage Compartment
Air Filters
46011-680-51 3000/3500/4000 A
High Voltage Compartment
Air Filters
46011-681-51 3000/3500/4000 A
Low Voltage Compartment
Auxiliary Switch 46011-676-50 All Ratings
Latch Check Switch 46011-675-50 All Ratings
Mechanism Cover 46011-679-50 All Ratings
Motor Limit Switch 46011-677-50 All Ratings
Type RI Mechanism* 46011-669-50 All Ratings
110 kV BIL, ð 25 kA
Vacuum Interrupter 46011-660-50
(1200 A /2000 A)
110 kV BIL, ð 40 kA
46011-661-50
(1200 A /2000 A)
110 kV BIL, 40 kA
46011-661-51
3000/3500/4000 A
125 kV BIL, ð 25 kA
46011-662-50
(1200 A /2000 A)
150 kV BIL, ð 31.5 kA
46011-663-50
(1200 A /2000 A)
Bushing 46011-664-50 110/125 kV BIL, 1200 A
46011-664-51 110/125 kV BIL, 2000 A
46011-664-52 110 kV BIL, 3000 A
110 kV BIL, 40 kA
46011-664-53
3500/4000 A
46011-664-54 150 kV BIL, 1200 A
46011-664-55 150 kV BIL, 2000 A
Blower Fan 46011-543-50 4000 A
Air Flow Switch 46011-544-50 4000 A
Square D Company Electrical equipment should be installed, operated, serviced, and maintained only by qualified
electrical personnel. This document is not intended as an instruction manual for untrained persons.
330 Weakley Road
No responsibility is assumed by Square D for any consequences arising out of the use of this
Smyrna, TN 37167 USA manual.
(615) 459-5026
Bulletin No. 6065-10 June 2002 © 1995–2002 Square D All Rights Reserved.
1-888- Square D (1-888-778-2733)
Replaces 6065-10 dated 09/00.
www.squared.com