Product Description

The racking mechanism integrated with the circuit breaker engages with latch plates mounted in the compartment on the circuit breaker positioning rails (see the figures Latch Plates and Locking Tabs Fully Extended Into the Latch Plates). Locking tabs on the left and right sides of the circuit breaker racking mechanism will enter slots on the compartment latch plates. If the racking mechanism locking tabs are not fully extended into these compartment latch plate slots, it will not be possible to rack the circuit breaker. The green handles located on the left and right sides on top of the beam of the circuit breaker racking mechanism are used to retract and extend the locking tabs into the compartment latch plates. Refer to Schneider Electric document number JYT3013100, EvoPacT MV Vacuum Circuit Breaker for further information.

The compartment latch plates also position the circuit breaker to the correct depth in the compartment. The flanges on the latch plates interact with the back side of the beam on the circuit breaker racking mechanism. As the circuit breaker racking mechanism operates, it relies on these locking tabs and latch plates to move the circuit breaker into or out of the test/disconnected or connected position.

Latch Plates

A

Latch plates

Locking Tabs Fully Extended Into the Latch Plates

A	Circuit breaker carrier pan flush with racking mechanism beam	C	Circuit breaker racking mechanism left locking tab fully extended into latch plate slot (right locking tab will look similar when fully extended into latch plate slot)	E	Circuit breaker racking mechanism green handle
B	Circuit breaker compartment left side positioning rail	D	Circuit breaker compartment left side latch plate	F	Circuit breaker racking mechanism beam

A compartment lockout provision (see the figure Compartment Lockout for Padlock and Keylock) is provided in each circuit breaker compartment for locking a circuit breaker out of the connected position. The compartment lockout is located on the right racking mechanism latch plate of each circuit breaker compartment. The compartment lockout provision is equipped with padlock provisions as standard, and can also be equipped with a keylock when specified by the customer. The compartment lockout inhibits racking a circuit breaker into the connected position. A circuit breaker can be stored in the test/disconnected position with the compartment lockout locked. The circuit breaker can also be removed from or inserted into the compartment with the compartment lockout locked.

Compartment Lockout for Padlock and Keylock

A

Padlock

B

Keylock (optional)

Right Locking Tab Retracted With Padlock Plate Engaged

A	Circuit breaker carrier pan flush with racking mechanism beam	E	Circuit breaker compartment right side latch plate
B	Circuit breaker racking mechanism beam flush with back flange on the latch plate	F	Circuit breaker racking mechanism green handle moved towards center of circuit breaker
C	A padlock hasp shown engaged with lockout plate	G	Circuit breaker racking mechanism beam
D	Circuit breaker compartment lockout plate

CAUTION
interlock Damage Do not test or operate interlocks by hand. Test interlocks only by moving the circuit breaker into or out of the compartment. Do not attempt to operate interlocks in an incorrect sequence. Failure to follow these instructions can result in injury or equipment damage.

Several of the required circuit breaker interlocks are contained within the racking mechanism integrated on each circuit breaker (see the figure Compartment Interlocks). Additional information on the circuit breaker interlocks can be found in Schneider Electric document number JYT3013100, EvoPacT MV Vacuum Circuit Breaker . The following interlocks are contained in the circuit breaker compartment.

• Shutter Interlocks: A blocking mechanism will not allow the shutters to open when the circuit breaker is not in the compartment. This interlock can also be used to padlock the shutters closed. See Shutters and Padlocked Closed Shutters.

• Racking Mechanism Stop Plate: A stop plate located on the floor of the compartment stops the circuit breaker from being inserted into the compartment when the circuit breaker racking mechanism is not in the racked out position.

• Automatic Spring Discharge: A circuit breaker mechanism spring discharge plate mounted on the right side of the compartment will automatically discharge the circuit breaker closing and opening springs, if the circuit breaker is inserted or withdrawn from the compartment with either closed vacuum interrupter contacts or charged springs. The plate engages with the automatic spring discharge interlock pin located on the right side of the circuit breaker. During the removal or insertion of the circuit breaker, the circuit breaker may automatically operate up to three separate times with open-close-open operations. Whether the circuit breaker operates 0, 1, 2, or 3 times depends on:

  • the charged or discharged state of the circuit breaker mechanism,

  • the open or close position of the circuit breaker,

  • and whether the circuit breaker is equipped with a mechanism charging motor.

Each operation will generate a loud noise as the circuit breaker mechanism discharges all of the stored energy. The discharging operations occur at a periodic distance and time of travel as the circuit breaker discharge pin moves down the length of the interlock plate. Do not be alarmed hearing the separate noises as it is intentional by the interlock; however, it is recommended for the user to manually discharge all energy from the circuit breaker mechanism before inserting or withdrawing the circuit breaker. Manually discharge the circuit breaker with control power disconnected from the circuit breaker and alternating pressing the open and close push buttons several times.

Compartment Interlocks

A

Shutter interlock

B

Racking mechanism stop plate

C

Automatic spring discharge plate

The secondary disconnect receptacle for circuit breaker power and control is located above the circuit breaker in the front, center area of the compartment (see the figure Secondary Disconnect Receptacle Assembly). The compartment has a molded insulating receptacle containing 33 contacts as standard, but it may be equipped instead with a “Contact Plus” receptacle that offers more circuit breaker auxiliary contacts and has an increased number of racking endurance operations (see the table Secondary Disconnect Labels). The type of receptacle in the compartment must be coordinated with and match the type of plug on the circuit breaker for all power and control features to operate. This coordination is made based on customer specifications at the time of order is indicated on the equipment by the symbols on the compartment labels and the top cover of the circuit breaker top cover (see the figure Coordinating Circuit Breaker Compartment and Circuit Breaker Top Cover Secondary Disconnect Labels and Secondary Disconnect Labels).

The receptacle mounting assembly has two tapered guide pins which help ensure proper engagement with the secondary disconnect plug for power and control mounted on top of the circuit breaker. Physically, the test and disconnected positions on the racking mechanism are identical. When the circuit breaker is fully racked out, it goes to test/disconnected position and the secondary disconnect plug for power and control is automatically disconnected. When the plug is manually pulled forward to connect with a circuit breaker in the test/disconnected position, the circuit breaker is considered to have entered into test mode. The control power can be connected to the circuit breaker in the test/disconnected position by rotating the handle attached to the secondary disconnect receptacle in the compartment and pulling it forward to engage with the circuit breaker.
The circuit breaker compartment door must be opened to access the handle for the secondary disconnect receptacle assembly, and the door must remain open if the handle has pulled the receptacle to the test position.

Secondary Disconnect Receptacle Assembly

A	Circuit breaker compartment secondary disconnect label	C	Instruction label	E	Guide pin
B	Handle	D	Secondary disconnect receptacle for circuit breaker power and control

Coordinating Circuit Breaker Compartment and Circuit Breaker Top Cover Secondary Disconnect Labels

A

Label on circuit breaker compartment identifying type of secondary disconnect receptacle for circuit breaker power and control

B

Label on top cover of circuit breaker identifying type of secondary disconnect receptacle for circuit breaker power and control

NOTE: Before racking in the circuit breaker, verify the label (A) on the circuit breaker compartment and the label (B) on the circuit breaker used in the compartment coordinate with each other.

The circuit breaker compartment may also be equipped with a stationary low voltage receptacle for additional features mounted to the rear, left side of the circuit breaker compartment floor (see the figure Low Voltage Receptacle for Additional Features). The receptacle mounting assembly has two tapered guide pins which help assembly to properly engage the mating plug mounted on the rear, underside of circuit breakers equipped with this feature. The receptacle and plug remain in a fixed position, regardless of the position of the circuit breaker in the compartment. The connection is made when the circuit breaker is inserted into the compartment and reaches the test/disconnected position.

The number of pins and types of connectors available for this low voltage receptacle will be based on customer-selected features. Refer to Schneider Electric document number JYT3013100, EvoPacT MV Vacuum Circuit Breaker for further information.

Low Voltage Receptacle for Additional Features

DANGER

Hazard of electric shock, explosion, or arc flash Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462. Disconnect power to both line and load connections before manually opening shutters or removing any barriers for maintenance or repair. Always use a properly rated voltage sensing device to confirm power is off. Failure to follow these instructions will result in death or serious injury.

Two metallic shutters (see the figure Shutters) are mounted directly in front of the primary high voltage contacts. The shutters help to prevent accidental contact with the primary high voltage contacts and do not provide arc flash protection. The shutters move with a rotary motion, actuated by racking in the circuit breaker, which interacts with the shutter actuator in the circuit breaker compartment.

The shutters can be padlocked closed when a circuit breaker is not in the compartment by inserting a lock into the slot on the lever located on the left side of the circuit breaker compartment (see the figure Padlocked Closed Shutters). The padlock must be removed before a circuit breaker can be inserted.

Shutters

A

Shutters

B

Shutter interlock

C

Shutter actuator

Padlocked Closed Shutters

A

Customer Padlock

The stationary, primary high voltage contacts for each phase are housed in a primary bushing assembly (see the figure Primary Bushings and High Voltage Contacts) consisting of insulating tubes extending toward the front of the circuit breaker compartment. The primary high voltage contacts of the circuit breaker engage these stationary primary contacts when the circuit breaker is in the connected position. The open ends of the bushing insulating tubes are covered by the shutters when the circuit breaker is in the test/disconnected position, or is removed from the compartment.

Depending on the rating, a Group A insulation of either molded fiberglass polyester or bisphenol epoxy bushings are provided as standard. If a customer specifies Group B insulation, cycloaliphatic epoxy bushings are provided.

Primary Bushings and High Voltage Contacts

A

Primary bushing assembly insulating tube

B

Primary high voltage contact

Front-accessible, bushing/window-type, 600 V rated, single- or multi-ratio current transformers (see the figure Current Transformers (2x 348 CTs Per Phase shown)) can be mounted in the compartment around either the line or load primary high voltage contact bushing assembly insulating tubes. A maximum of four current transformers, depending on accuracy, can be mounted per phase—two on the line side and two on the load side.

Current Transformers (2x 348 CTs Per Phase shown)

Higher accuracy or multi-ratio current transformer applications may limit the number of current transformers permitted per phase in a compartment. The current transformer positions and wire routings are identified in the figures Current Transformer Wire Trough, 4 x 347 Current Transformers Per Phase in Circuit Breaker Compartment, Position Identification of 347 Current Transformers in Circuit Breaker Compartment, and Position Identification of 348 Current Transformers in Circuit Breaker Compartment. The same current transformer can be used on any bushing insulation material. The bushing assembly creates a dedicated wire trough for helping route the current transformer wires. A cover is used to help store, hide, and protect these wires inside the trough, as shown in the figure Current Transformer Wire Trough.

An analysis should be performed to determine which requirements for relays and current transformers provide optimal protection for the installation.

Current Transformer Wire Trough

A

CT position 1 and 3 wire routing

B

CT position 2 and 4 wire routing

C

CT wire trough with cover

4 x 347 Current Transformers Per Phase in Circuit Breaker Compartment

A

CT position 1

B

CT position 2

C

CT position 4

D

CT position 3

Position Identification of 347 Current Transformers in Circuit Breaker Compartment

A	CT position 2	C	CT position 4	E	CT wire trough with cover
B	Shutter	D	CT position 1	F	CT position 3

Position Identification of 348 Current Transformers in Circuit Breaker Compartment

A

Shutter

B

CT position 1

C

CT wire trough with cover

D

CT position 3

A ground bus contact bar is located on the floor of the circuit breaker compartment (see the figure Ground Bus Contact Bar). It is directly connected to the main ground bus for the equipment, and mates to a sliding ground contact located on the rear underside of the circuit breaker. When a circuit breaker is inserted into a circuit breaker compartment, the sliding ground contact of the circuit breaker engages the ground bus contact bar in the compartment before the circuit breaker reaches the test/disconnected position. The circuit breaker remains continuously grounded in all positions while in the compartment, even in transport when moving between the connected and test/disconnected positions.

Ground Bus Contact Bar

A

Ground bus contact bar

Mechanism-operated contacts (see the figure Mechanism-Operated Contact Unit) are optional, compartment-mounted, auxiliary contacts operated by the circuit breaker mechanism. Like circuit-breaker-mounted auxiliary contacts, the MOC indicates whether the circuit breaker is in the open or closed position. The MOC operates with the circuit breaker in both the connected and test/disconnected positions.

If a customer application needs more or higher rated breaker status indication contacts than the 10NO/9NC aux contacts offered by the “Contact Plus” breaker (see the table Secondary Disconnect Labels), then these optional MOC auxiliary switch contacts installed in the circuit breaker compartment can be used. The MOC auxiliary switch can be configured to have 10 contacts (5NO/5NC) or 13 contacts (6 NO/7 NC). Refer to the customer order drawings shipped with the equipment.

The MOC unit is mounted on the left side of the circuit breaker compartment. It is operated by a mechanism that is driven vertically by a roller on the left side of the circuit breaker. The auxiliary contact switch is mounted at the top of the MOC unit inside the front area of the circuit breaker compartment.

Mechanism-Operated Contact Unit

A

MOC

B

MOC auxiliary contact switch

Truck-operated contacts (see the figure Truck-Operated Contact Unit) indicate the physical position of the circuit breaker in the compartment. The TOC indicates whether the circuit breaker is in the connected or test/disconnected position. The TOC option is configured to have 10 contacts on the auxiliary switch.

The TOC unit with the auxiliary switch is mounted on the right side of the circuit breaker compartment. It is operated by a spring-loaded lever. This lever is activated, just before the circuit breaker reaches the connected position, by a pin on the upper right side of the circuit breaker.

Truck-Operated Contact Unit

A

TOC

B

TOC auxiliary contact switch

The voltage transformer (VT) and control power transformer (CPT) drawers are part of self-contained compartments (see the figure Front Sub-Section with Voltage and Control Power Transformer Compartments in Position A and B) . The auxiliary compartments are located in the section in positions identified as A, B, C, or D (see the figure Compartment Positions in a Section).

The auxiliary drawers move from the disconnected to the connected position via two positioning rails mounted on the sides of the compartment. The rails capture and align rollers on the drawers. As a standard, the CPT and VT drawers are moved to and from the connected position by manually pushing or pulling the drawers.

Optionally, the drawer and compartment can be equipped with a mechanical racking system to enable closed door racking. This racking system can also be motorized to enable remote racking. The racking mechanism is located on the floor of the auxiliary compartment. The non-motorized racking mechanism is operated by the same removable racking handle, as the circuit breaker, inserted into the front port. On auxiliary (CPT/VT) drawers equipped with a racking mechanism, the racking mechanism, racking handle, or auxiliary compartment can be damaged by over-torquing due to high resistance from the auxiliary drawer/compartment connection points or from any obstruction in the compartment that inhibits free movement of the auxiliary drawer through the positioning rail by the racking mechanism. The auxiliary racking mechanism is designed for 18 lb-ft (24.4 N•m) of maximum torque. Exceeding the maximum torque will damage the racking mechanism. On the first attempt to move an auxiliary drawer, equipped with a racking mechanism, in the compartment, the torque required to rack an auxiliary drawer into and out of the connected position should be verified and documented for future inspection records. If equipped with a digital system, before electrically racking the auxiliary drawer, verify the output to help prevent damage to the racking mechanism from over-torquing.

The auxiliary drawer front panel is recessed behind the front compartment door when in the connected position, (see the figure Auxiliary Drawer Position Indicator Symbols). When a racking mechanism is not installed, the user manually pushes the auxiliary drawer to the connected position (see the figure Auxiliary Compartment without Racking Mechanism Position Indicator (shown in Transport position)) and tightens two thumbscrews to keep the drawer in the connected position (see the figures CPT Compartment and Drawer Features and VT Compartment and Drawer Features). With the racking option, an indicator beside the racking port reflects which position the auxiliary drawer is in: disconnected, transport, or connected (see the figure Auxiliary Compartment Door Faceplate with Racking Mechanism). For further detailed instructions on moving an auxiliary drawer in the compartment, refer to CPT and VT Drawer Operation. The auxiliary compartment racking mechanism may have a lockout that can be padlocked to block the insertion of a racking handle into the port on the racking mechanism (see the figure Auxiliary Compartment Door Faceplate with Racking Mechanism).

An insulating barrier divides the auxiliary compartment. The stationary primary contacts and associated high voltage parts are mounted in insulator bushings behind the barrier in the compartment. The bushings are furnished with molded fiberglass polyester insulation as standard, but a customer may also specify a Group B insulation of cycloaliphatic epoxy. These insulator bushings also help route auxiliary drawer connections to the specified location.

Self-aligning primary contacts on the drawer engage the stationary primary contacts mounted in the insulator bushings as the drawer is moved into the connected position. As the drawer is disconnected, a static discharge ground contact, mounted on top of the compartment, grounds the primary connection. This primary fuse discharge bar with the static ground contact is located in the front portion of the compartment and is intended to return to ground any remaining voltage that could be accumulated in the transformers. In the disconnected and connected positions and between, there is a sliding ground contact mounted on the bottom of the drawer that maintains continuous grounding through a ground busbar mounted on the floor of the compartment.

A standard auxiliary compartment contains extension rails mounted on the left and right side positioning rails which can slide out to be extended in front of the front face of the section. These extended rails allow the CPT or VT drawer to be rolled out of the compartment. This removed position facilitates access to the auxiliary drawers and the primary fuses.

Auxiliary drawers may have connections routed to the main bus or cable load bus in the same section with epoxy coated bus. Auxiliary connections may be routed to cable load bus in an adjacent section with shielded, medium voltage rated cabling. Refer to the specific customer drawings for details on assembly connections.

Front Sub-Section with Voltage and Control Power Transformer Compartments in Position A and B

A	Static primary discharge ground contacts	D	Voltage transformer (VT) drawer	G	Insulator bushings and stationary primary contacts
B	Control power transformer (CPT) drawer	E	Primary contacts	H	Low voltage instrumentation compartment
C	Extension rails (shown not extended)	F	Shutter barriers	I	Lower circuit breaker compartment

Auxiliary Compartment Door Faceplate with Racking Mechanism

A

Instruction label for racking out

B

Position indicator

C

Manual racking port

D

Racking Lockout

E

Instruction label for racking in

Auxiliary Compartment without Racking Mechanism Position Indicator (shown in Transport position)

Auxiliary Drawer Position Indicator Symbols

Low power voltage transformers (LPVTs) are stationary-mounted devices equivalent in function to traditional voltage transformer drawers. The compartmental construction of the switchgear isolates the LPVTs from other section compartments. Because of a compact and efficient design, the LPVTs do not require an entire traditional front sub-section auxiliary compartment position and door. This enables the section to have a larger low voltage instrumentation compartment for protection and control devices (see the figures CPT and LVPT in Position A and B Compartments and CPT and LVPT in Position C and D Compartments). LPVTs are wired from the primary high voltage terminal to an insulator bushing assembly similar to the one in a traditional auxiliary compartment and with the same insulator bushing material options. The LPVTs are wired on the secondary terminal out to the low voltage instrumentation compartment.

The control power transformer (CPT) in the figures Front Sub-Section with Voltage and Control Power Transformer Compartments in Position A and B and CPT Compartment and Drawer Features supplies power for circuit breaker operation and for protection, control, communication, and other low voltage devices. The transformer is sized for the application needs of the specific order. Do not add arbitrary non-specified loads after installation. The maximum capacity of the CPT drawer is 15 kVA.

The CPT, the primary current-limiting fuses, and the secondary molded case circuit breaker are mounted on the auxiliary drawer and are moved as an assembly (see the figure CPT Compartment and Drawer Features). The secondary circuit breaker handle must be in the OFF position when moving the drawer (see the figure CPT Secondary Circuit Breaker Operation). To release the latch plate from the padlock provision interlock in the connected position or prior to moving into connected position, push the secondary circuit breaker handle to the left (OFF position). To engage the latch plate in the padlock provision interlock, push the secondary circuit breaker handle to the right (ON position) after returning the assembly to the connected position.

Each control power transformer compartment is equipped with a padlock provision (see the figure CPT Compartment and Drawer Features) which can be used to lock the drawer in the connected position in the compartment. Secondary molded plug contacts are mounted on the bottom right side of the drawer (see the figure CPT Compartment and Drawer Features). The drawer secondary contacts engage fixed contacts mounted on the floor of the CPT compartment when the drawer is moved into the connected position.

CPT Secondary Circuit Breaker Operation

CPT Compartment and Drawer Features

A	Manual drawer in connected position with thumb screws (manual drawers only)	G	Racking dismounting bolt (integrated racking drawers only, 1/2–13 x 1.75 in. SAE Grade 5 (minimum) hex head bolt)
B	Static primary discharge ground contacts	H	Secondary contacts
C	Pull handle	I	Extension rail
D	Padlock provision	J	Racking port (integrated racking drawers only)
E	Secondary circuit breaker	K	Racking position indicator (integrated racking drawers only)
F	Secondary circuit breaker handle latch plate	L	Continuous drawout unit ground contact

Voltage transformers (VTs) (see the figures Front Sub-Section with Voltage and Control Power Transformer Compartments in Position A and B and VT Compartment and Drawer Features) supply voltage indication for metering and relaying purposes. Primary current-limiting fuses are mounted on each voltage transformer. Secondary molded plug contacts (see the figure VT Compartment and Drawer Features) are mounted on the bottom right side of the VT drawer. The drawer secondary contacts engage fixed, compartment-mounted contacts when the drawer is moved into the connected position. Secondary fuses for the voltage transformers are located in the front of the compartment or in the low voltage instrumentation compartment. Refer to the customer order drawings provided by Schneider Electric.

VT Compartment and Drawer Features

A	Manual drawer in connected position with thumb screws (manual drawers only)	F	Secondary contacts
B	Static primary discharge ground contact	G	Extension rail
C	Primary current-limiting fuse	H	Racking port (integrated racking drawers only)
D	Pull handle	I	Racking position indicator (integrated racking drawers only)
E	Racking dismounting bolt (integrated racking drawers only, 1/2 -13 x 1.75 in. SAE Grade 5 (minimum) hex head bolt)	J	Continuous drawout unit ground contact

Low power voltage transformers (LPVTs) are sensor-style VTs (resistive or capacitive dividers) as opposed to traditional iron core transformer style VTs. The LPVTs output a secondary voltage between 0.2 V and 4 V, and can be used in conjunction with a converter box to give a 120 V output to protection relays and meters.

With a one-high circuit breaker section where a CPT is mounted in the top compartment (A Position), the LPVT can be mounted below the CPT compartment and behind the low voltage instrumentation compartment (see the figure CPT and LVPT in Position A and B Compartments). In this position, the LPVT is accessible through the circuit breaker compartment.

With a one-high circuit breaker section where a CPT is mounted in the bottom compartment (D Position), the LPVT can be mounted above the CPT compartment and behind the low voltage instrumentation compartment (see the figure CPT and LVPT in Position C and D Compartments). In this position, the LPVT is accessible through the CPT compartment.

CPT and LVPT in Position A and B Compartments

A

CPT compartment

B

Low voltage instrumentation compartment

C

LPVT

D

Lower circuit breaker compartment

CPT and LVPT in Position C and D Compartments

A

Upper circuit breaker compartment

B

Low voltage instrumentation compartment

C

LPVT

D

CPT compartment

Surge arresters (or lightning arresters (LAs) ) of appropriate rating are mounted in the rear compartments containing incoming and outgoing cables, when specified (see the figures Rear Compartment — One-High Section (rear compartment covers removed) and Rear Compartment — Two-High Section (rear compartment covers removed)). The vulnerability of the incoming and outgoing lines to lightning strikes or other high voltage transient conditions determines surge arrester class (i.e. distribution, intermediate, or station) and justification. Surge arresters must remain disconnected from the main bus during start-up testing. Surge arresters are shipped from the factory disconnected from the main bus to help avoid damage during dielectric withstand testing prior to energizing. Connect surge arrestors after dielectric withstand testing and before energization of the line-up. A switching transient analysis should be performed to determine the surge protection requirements that provide the optimal protection for the installation.

When specified, zero sequence current transformers (ZSCTs) are used for ground fault detection and located in each rear compartment above or below the appropriate cable conduit opening.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not install ground studs on equipment in the field as the clearances to grounded surfaces may not be adequate. Contact the local Schneider Electric representative for further information. Failure to follow these instructions will result in death or serious injury.

Customers can specify that the insulated primary cable connection bus be equipped with ground studs.

Ground studs are mounted on the bus above the area where the lugs of the customer’s primary cables are installed. Ground studs allow customers to connect temporary grounding to the section during maintenance. Before connecting grounding to incoming line, customers must follow all safety precautions and must have control of the incoming source.

If required, the standard cable termination site for the primary cable connection bus can be equipped with an adapter that will permit the customer to land two additional primary cable lugs per phase.

Surge capacitors, when specified, are mounted in the rear compartments. Sections can be equipped with surge capacitors rated up to 13.8 kV in certain applications. However, certain configurations may limit the space available to install surge capacitors. A switching transient analysis should be performed to determine what surge protection requirements provide optimal protection for the installation.

The continuous switchgear health monitoring system consists of thermal and environmental monitoring. Environmental monitoring includes sensors to monitor ambient temperature and humidity.

The continuous circuit breaker health monitoring system includes sensors permanently installed on the circuit breaker to monitor the following conditions:

• Thermal monitoring of circuit breaker primary connections

• Operating speed of circuit breaker mechanism

• Vacuum interrupter contact erosion gap

• Health of closing and tripping coils

• Health of spring charging motors

• Health of circuit breaker/VT/CPT racking motors, when equipped

The circuit break sensors are integrated into the SMD system which raises an alarm in case of abnormal conditions. For further information, refer to Schneider Electric document number JYT3013100, EvoPacT MV Vacuum Circuit Breaker

Use a torque wrench to tighten all general hardware and bolts for busbar connections in the switchgear during installation and maintenance steps as specified in the table Switchgear Bolt Torque Value, unless otherwise specified.

CAUTION
INADEQUATE LUBRICATION Do not use any other grease than the one specified in this instruction material. Failure to follow these instructions can result in injury or equipment damage.

All areas requiring grease in the switchgear, except for the circuit breaker, use Mobilith SCH™ 100 grease (Schneider Electric part number HUA11872). Use this grease as instructed in the sub-sections under Inspection and Maintenance. Refer to Schneider Electric document number JYT3013100, EvoPacT MV Vacuum Circuit Breaker , for more information on circuit breaker greasing and maintenance.