6045–1

Introduction

This bulletin contains instructions for the proper installation, operation, and maintenance of HVL/cc™ Metal-Enclosed Switchgear manufactured by Schneider Electric™. This product offers switching, metering, and interrupting capabilities for medium voltage systems ranging from 2.4 kV to 38 kV, 60 kV BIL to 150 kV BIL. The equipment is available in a variety of arrangements and in enclosures designed and constructed for indoor (NEMA 1) and outdoor (NEMA 3R) use.

Before You Begin

Read and understand:

  • this bulletin before performing the installation, operation, and maintenance steps described in this bulletin.

  • the HVL/cc Grounding Switch Application section of the Medium Voltage, Metal-Enclosed Switchgear User Guide (6045IB2401).

NOTE: If more information on the grounding switch application for this equipment is needed, contact your Schneider Electric representative. In accordance with national and local electrical codes, electrical equipment must be installed, operated, serviced, and maintained only by qualified personnel.

General Description

HVL/cc switchgear is made up of modular units containing fixed mounted interrupters with or without replaceable E-rated fuses. It is a compact design with optional front-only accessibility. Equipment is available in single or multiple bay units. Sections are shipped assembled for ease of handling and installation. HVL/cc metal-enclosed switchgear from Schneider Electric is designed, manufactured, and tested in accordance with ANSI standards C37.20.3, C37.20.4, C37.57, C37.58, Canadian standards CSA 22.2 no. 31, CSA 22.2 no. 193, and NEMA SG5 where applicable.

Enclosures

HVL/cc Metal-Enclosed Switchgear is available in indoor and outdoor enclosures.

Indoor switchgear enclosures (see Indoor Switchgear (NEMA1 construction)) include these standard features:

Indoor Switchgear (NEMA1 construction)

  • Lifting angles on the top of each shipping section.

  • Provisions for future expansion (when using main cross bus).

  • Clear acrylic viewing ports for inspection of switch blade position.

  • Steel enclosure per ANSI C37.20.3, NEMA 1.

  • Full-length ground bus in multiple bay enclosures.

  • Interlock which inhibits removing the load-side panel while the switch or circuit interrupter is closed and/or ground switch is open.

  • Switch or circuit interrupter interlock (electrical and/or mechanical) which inhibits operating the switches main contacts while the load-side door is removed.

  • Provisions for padlocking the load-side panel.

  • Key interlocking is optional.

Outdoor switchgear enclosures (see Outdoor Switchgear (NEMA 3R construction) ), are designed and manufactured with the following standard features:

Outdoor Switchgear (NEMA 3R construction)

  • Roof sloped to rear for precipitation runoff.

  • Operating handles are enclosed.

  • Formed steel base.

  • Full height gasketed front doors.

  • Steel enclosure per ANSI C37.20.3, NEMA 3R.

  • Split rear panels with tamper-resistant bolts.

  • Strip heaters in each switch bay.

  • Stay rods to hold outer-hinged doors in open position.

Compartments

The information contained in this section describes the compartments of HVL/cc Switchgear (see Switch Cubicle).

Switch Cubicle

Square D™ brand DIN-E style fuses shown as a reference.

A Busbar compartment D Interrupter switch or disconnector G Cable termination J Bolted front panel (app. B only)
B Upper panel or LV compartment E Fuse or load-side compartment H Capacitive divider K Viewing ports
C Mechanism compartment F Load-side access panel I Live line indicators (LLIs) L Rating nameplate

Bus-bar Compartment

The bus-bar compartment is isolated from the other compartments of the equipment by the epoxy body of the interrupter or 11–gauge steel barriers. The bus bars extend continuously through the length of the switchgear and may transition from application A to application B bus compartments and vice versa. Two main bus positions allow future extensions and connections to existing equipment. HVL/cc bus has been tested to 25 kA for two seconds with 68 kA peak (40 kA momentary) current levels. It has been further tested to the full-integrated level of 63 kA using a four-frame run of bus, including a 29.5 in. (750 mm) compartment. The bus bar is 1/4 x 2 in. (6 x 51 mm) tin-plated copper for 600 A or two 1/4 x 2 in. (6 x 51 mm) for 1200 A.

Upper Panel/Low-voltage Compartment

The upper panel/low voltage compartment has a bolted panel when there are no controls or relays present in this vertical section. When any of these devices are present, the low-voltage compartment has a hinged panel. The low-voltage compartment houses terminal blocks and supports a relay or monitoring device that may be supplied with the switchgear line-up. All auxiliary contacts for the control of the mechanism are wired to terminal blocks for customer access and are in this compartment. An optional thermal scanning window is available in this panel.

Fuse/Load-side Compartment

The fuse/load-side compartment houses fuses, voltage transformers (VT), the control power transformer (CPT), or bus connections. The panel is interlocked with the switch and can be padlocked by several methods (see Panel Interlock Provisions).

Mechanism Compartment

The HVL/cc can be equipped with either an over toggle mechanism (OTM) or a stored energy mechanism (SEM).

The mechanism compartment has a black polycarbonate and steel cover that encloses the mechanism. It is etched with instructions for operating the mechanism. The cover also has a mimic bus that shows the position of the switch and contains nameplate information for the interrupter. Two ports for viewing the position of the main blades are located within the mechanism cover. The load-side Live Line Indicators (LLIs) are also positioned on the cover.

Mechanism Covers

A

Viewing ports

F

Ground switch padlock provision

K

Close push button (SEM)

B

Mimic bus

G

Switch operating port (OTM)

L

Open push button (SEM)

C

Live line indicators

H

Padlock provision

M

Spring charge indicator (SEM)

D

Rating nameplate

I

Spring charging port (SEM)

N

Mechanical interlock opening lever (SEM only if equipped)

E

Ground switch operating port (OTM/SEM if equipped)

J

Switch operating counter (if equipped)

O

Motor cut-off switch (SEM only-if equipped)

Mechanisms

The mechanism compartment cover comes with optional padlock provisions for blocking access to the control functions of the interrupter. The covers do not block electrical operation of either the mechanism or the FuseLogic™ function from tripping the interrupter.

Optional electrical mechanical, and/or keyed interlocks can be supplied to block the switch operations outlined in this bulletin.

The HVL/cc Switchgear Mechanism Compartment contains the operators for both the main switch and the grounding switch. Available mechanisms include:

  • Manually operated Over Toggle Mechanism (Type OTM).

  • Motor operated Over Toggle Mechanism (Type OTM).

  • Manually operated Stored Energy Mechanism (Type SEM) with optional FuseLogic system.

  • Motor operated Stored Energy Mechanism (Type SEM) with open and close coils, and optional FuseLogic system.

NOTE: Only manually operated OTM and SEM are available in Class 1, Division 2 applications.

Over-toggle Mechanism (OTM)

The OTM is the standard mechanism supplied with the HVL/cc switchgear. The mechanism requires the springs be compressed into an over-toggle position where they release their energy for closing and opening the device. The speed of the blades is independent of the user. The OTM is available with a motor for remote electrical operation and is available with auxiliary contacts, with or without the motor (see Over-Toggle Mechanism (OTM)).

The grounding switch actuator is optional on the OTM mechanism. It is an over-toggle actuator and has a fault close rating equal to that of the switch. It can be blocked if required for application. Motor operation is not available for the grounding switch.

Over-Toggle Mechanism (OTM)

A

Viewing ports

F

Auxiliary contacts

B

Ground switch port (if equipped)

G

Motor control circuit board

C

Over-toggle port

H

Ground switch port (if equipped)

D

Motor

I

Main interrupter cut-off microswitch

E

Motor gear box

   

Stored Energy Mechanism (SEM)

The SEM is the optional mechanism for HVL/cc. It is supplied when remote trip or close is required.

The SEM requires a single action to charge both opening and closing springs. The opening spring is charged first; therefore, the switch is immediately ready to trip after the switch has been closed. The SEM is provided when direct tripping for the FuseLogic system is ordered. The SEM is available with a motor for remote electrical operation and is available with auxiliary contacts, with or without the motor. It can come with only an opening coil. When a motor is supplied, the opening and closing coils are also included. An under-voltage release is available with the mechanism. This mechanism is also used in all transfer schemes.

The grounding switch actuator is optional on the SEM mechanism. It is an over-toggle actuator as on the OTM and has a fault close rating equal to that of the switch. Motor operation is not available for the grounding switch.

Stored Energy Mechanism (SEM)

A

Open/close and ground position indicator

H

Ground switch cut-off microswitch

B

Ground switch port (if equipped)

I

Main interrupter cut-off microswitch

C

Spring charge port

J

Close push button

D

Motor

K

Open push button

E

Motor gear box

L

Motor cut-off microswitch

F

Auxiliary contacts

M

Spring charge indicator

G

Motor control circuit board

   

Interrupter Switch

The interrupter housing is an epoxy enclosure that is non-refillable and contains SF6 gas. The SF6 gas helps extinguish the electrical arc. This low-pressure enclosure sheilds the main contacts from the environment. It contains interruption by-products, including the arc, allowing for use of this interrupter in environments where air switches are not suitable.

SF6 Gas

Switchgear

Pressure

Interrupter Weight

Up to 17.5 kV

5.8 psi gauge (0.4 bar)

0.210 kg = 210 grams

25.8–38 kV

14.5 psi gauge (1.0 bar)

0.591 kg = 591 grams

NOTE: L1, L2, and L3 labeling on the switch housing is not representative of phase sequence A, B, C.

Cross-section of the Interrupter Switch/Disconnector

A

Viewing ports

C

Switch blades

B

Fixed contact

D

Operating shaft

Three rotating blades are sealed in the enclosure and have only one external rotating seal. Contact Blade Positions shows the three positions of the rotating blades.

Contact Blade Positions

The distance between the fixed and moving contacts is sufficient to withstand the normal recovery voltage and system-imposed transient recovery voltages (TRVs). The distance is great enough to also withstand 110% of the rated BIL and sixty-cycle withstand voltages.

Optional Grounding Switch

The interrupter switch has an optional feature that enables grounding the switch. For more information on units with grounding switches, refer to the HVL/cc Grounding Switch Application section of the Metal Enclosed Load Interrupter Switchgear with HVL/cc Switches catalog (6045IB2401) or call your local Schneider Electric representative.

Load-side Access Panel

The load-side access panel is mechanically interlocked with the switch. It comes with locating and latching hooks and a “Tee” slot for the switch interlock (see Panel Interlock Provisions). When the optional load-side discharge assembly (LDA) is supplied, a view port is provided for identifying the position of the LDA. An optional thermal scanning window is also available in this panel.

Cable Termination

DANGER
Hazard of electric shock explosion or arc flash
Only use lugs provided by Schneider Electric in order to maintain dielectric clearances.
Failure to follow these instructions will result in death or serious injury.

Lugs are provided for HVL/cc. DO NOT USE OTHER MANUFACTURERS LUGS for the medium voltage cable unless authorized by Schneider Electric. The lugs are mounted inside the field shapers and accommodate one or two cables.

FuseLogic System Components

The FuseLogic system inhibits inadvertent switching until fuses are installed or replaced. The system is provided as an option on HVL/cc Metal-Enclosed Switchgear. It is available with the SEM mechanism and Square D brand DIN-E (or Bussmann equivalent) style fuses only. This system is not available with Mersen™ CS-3 fuses.

The FuseLogic system uses Square D brand medium voltage fuses with a special blown fuse indicator pin. This blown fuse indicator works in conjunction with the switch to form a simple lockout mechanism. The FuseLogic system functions without auxiliary power in most cases.

Blown Fuse Indicator (BFI)

The optional BFI is available with either the OTM or SEM mechanisms. The assembly is located on the line side of the fuse. It operates a flag that is seen through a hole in the mechanism cover. The BFI drives a direct acting trip or a time delayed trip when supplied with FuseLogic system schemes.

Live-line Indicators (LLI)/Capacitive Divider (CD)

The LLIs are equipped with neon lamps that indicate the presence of voltage. They are visible on the front of the mechanism cover. They are wired to the CD located on the load side of the switch. Optional CDs are installed on the main bus or line side of the switch with the LLI mounted on the front panel.

Test ports on the LLIs are suitable for testing voltage with a properly rated voltage sensing device (see Phase Sequence Testing). LLIs are not an indicator of the absence of voltage. Use properly rated test equipment to help ensure no voltage is present before performing any maintenance procedures.

The CD is a standoff support insulator with the capacitor permanently bonded inside. The power from this capacitor provides the energy required for the neon lamps of the LLIs. The energy can also be used to activate optional features such as an auto-transfer scheme.

Load-side Discharge Assembly (LDA)

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.
  • Load-side discharge assembly does not have fault-making capability.
  • Use the load-side discharge assembly only where there is no possibility of load-side back-feed from alternate power sources such as commercial power, down-stream generator, and/or charged capacitor bank.
Failure to follow these instructions will result in death or serious injury.

The LDA is a device used to discharge to ground any residual voltage on the load side of the fuses after the grounding switch has closed. The device operates in conjunction with the grounding switch and is available only on fused units equipped with an optional grounding switch. This option is available in units with Square D brand DIN-E style fuses only. This option is not available with Mersen CS-3 fuses.

Load-side Discharge Assembly Location

For more information on units with grounding switches refer to the “HVL/cc Grounding Switch Application” section of the “Metal Enclosed Load Interrupter Switchgear with HVL/cc Switches” catalog (6045IB2401) or call your local Schneider Electric representative.

Panel Interlocks

The HVL/cc is equipped with mechanical interlocks as a standard feature. The switch interlock inhibits removing the load-side panel while the load-interrupter switch is closed (also open and ungrounded, if so equipped). Padlock provisions are also available for the load-side panel.

Additional padlocking provisions are available for both or either the motor cut-off switch and/or the ground switch. The load switch can be padlocked using an optional padlocking provision located on the mechanism cover polycarbonate hinge covers.

Key interlocks are optional equipment. They are often supplied in conjunction with metal-enclosed switchgear to direct proper operation and coordination of the equipment. The key interlock schemes are usually described on the switchgear assembly drawings supplied with the equipment.

Panel Interlock Provisions

Class 1, Division 2 Certification

The Class 1, Division 2 switchgear is used in hazardous areas, as defined by National Electrical Code® (NEC®), and is self-certified for use in T3B locations with heaters and T5 locations without heaters. The Class 1, Division 2 switchgear is maintained in the same manner as the standard switchgear with the exceptions noted throughout this bulletin. Special features of Class 1, Division 2 rated equipment are:

Moisture Contamination Avoidance and Mitigation

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
  • Store the equipment in a clean, dry (including no condensation), well-ventilated area with an ambient temperature of approximately 70°F (21°C).
  • If heaters are furnished in the assembly, energize them from an external source. When energizing heaters from an external source, remove the primary and secondary overcurrent protective devices from the control power transformer.
  • If heaters are not installed in the assembly, and the area is cold and damp, use a temporary heating source within the assembly. A minimum of 125 W of heat per section is recommended.
  • Avoid greasy, smoky heaters that can deposit carbon on insulation, which could lead to tracking and insulation breakdown.
  • If moisture, condensation, or chemical ingress is observed, do not energize the equipment. If the equipment is already energized, de-energize it immediately.
Failure to follow these instructions will result in death or serious injury.
WARNING
Fire Hazard
Remove all flammable material in the vicinity of the heaters, such as packaging, accessories in boxes, and documentation, before energizing the heaters.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

Shipping, Receiving, and Storage Requirements

This equipment does not achieve its ratings until it is installed per record/as-built drawings, installed per the instructions contained in this document, and has operational environmental controls with appropriate settings to help mitigate environmental influences. This equipment can be stored in a climate controlled area that uses both heating and cooling to maintain acceptable environmental conditions. Indoor and outdoor rated equipment is not suitable for outdoor storage.

  • The equipment should be treated as if it is in storage until it is installed and operational. The storage area should be clean, dry (75% or less relative humidity), and climate controlled with proper ventilation.

  • To keep the equipment dry, the use of heaters is required in some cases (for example, during seasonal or low periods of electrical loading and equipment de-energization):

    • Consult the engineer of record for the appropriate environmental control settings or means to mitigate environmental influences.

    • If so equipped, ensure that the thermostats and/or humidistats are set to mitigate condensation. A minimum of 125 W of heat per section is suggested.

    • If heaters are used with the equipment that were not included in the equipment by Schneider Electric, they must be clean and free of debris and grease. Greasy and/or smoky heaters can contaminate electrical insulation and lead to dielectric breakdown and/or tracking.

  • Shipping packaging is not suitable for and cannot be used by itself for equipment storage unless otherwise indicated on the shipping packaging labeling.

  • When receiving equipment, the equipment may be at a lower temperature than the ambient air temperature. Allow time for the equipment temperature, including the temperature of internal components, to rise to the ambient air temperature before making openings in or otherwise disturbing the packaging. Condensation can occur on and inside the equipment if warm air contacts cold surfaces of the equipment. Moisture damage can occur, destroying the dielectric capabilities of the equipment and rendering it unusable.

  • The factory shipping wrap around the equipment on shipping pallets is not suitable for non-enclosed over-the-road transportation that risks exposing the equipment to the elements. The factory shipping wrap around the equipment should remain on the equipment until the equipment is ready to be inspected and stored or inspected and installed. After receiving the equipment and allowing it to acclimate to the environment, remove the packaging and inspect the equipment for damage that may have occurred in transit. If damage is found or suspected, immediately file a claim with the carrier and notify your Schneider Electric representative.

  • Follow these guidelines every time the equipment is moved to a new storage location or to its final destination.

Installation, Operation, and Maintenance Requirements

This equipment does not achieve its ratings until it is installed per record/as-built drawings, installed per the instructions contained in this document, and has operational environmental controls with appropriate settings to help mitigate environmental influences. This equipment can also be operated in a climate controlled area that uses both heating and cooling to maintain acceptable environmental conditions. Indoor and outdoor rated equipment is not suitable for outdoor storage.

In some cases (such as seasonal electrical loading, de-energized equipment, and standby/alternate power sources), the heat generated by equipment loading is insufficient to prevent condensation and alternate heat sources are required. If environmental controls such as a thermostat or humidistat are used, ensure their settings are sufficient to mitigate condensation and remain operational at all times. Consult the Engineer of Record for the appropriate environmental control settings.

Exposure to Moisture, Chemicals, and Condensation

If liquids such as moisture, chemicals, and condensation contact the electronics, circuit breaker, fuses, bussing, or other electrical components, do not attempt to clean or repair the equipment as this may lead to unrepairable damage. If the equipment is energized, de-energize it. If equipment is not energized, do not energize it. Contact the Schneider Electric Customer Care Center at 888-778-2733.

Equipment Installation for Seismic Applications

Introduction

Seismic certification is an optional feature on the HVLcc product line and provides seismic conformance options to any of the North American and International building codes and seismic design standards identified in List of supported regional building codes and seismic design standards. HVLcc that is seismically certified has been certified to the seismic requirements of the listed code per the manufacturer’s certificate of compliance (CoC). Equipment compliance labels and CoC’s are provided with all seismically certified HVLcc. Refer to the equipment CoC for certification details and applicable seismic parameters. To maintain the validity of this certification, the installation instructions provided in this section must be followed.

List of supported regional building codes and seismic design standards

Country / Region Code Reference ID Code Name
Argentina INPRES-CIRSOC103 Argentinean Standards for Earthquake Resistant Constructions
Australia AS 1170.4-2007 (R2018) Structural design actions, Part 4: Earthquake actions in Australia
Canada NBCC National Building Code of Canada
Chile NCh 433.Of1996 Earthquake resistant design of buildings
China GB 50011-2010 (2016) Code for Seismic Design of Buildings
Colombia NSR-10 Título A Colombian Regulation of Earthquake Resistant Construction
Europe Eurocode 8 EN1998-1 Design of structures for earthquake resistance – Part 1: General rules, seismic actions and rules for buildings
India IS 1893 (Part 1) : 2016 Criteria for Earthquake Resistant Design of Structures Part 1 General Provisions and Buildings
Indonesia SNI 1726:2019 Earthquake Resistance Planning Procedures for Building and Non-building Structures
Japan Building Standard Law The Building Standard Law of Japan
Mexico CFE MDOC-15 Civil Works Design Manual, Earthquake Design
New Zealand NZS 1170.5:2004+A1 Structural design actions, Part 5: Earthquake actions – New Zealand
Peru N.T.E. - E.030 National Building Code, Earthquake-Resistant Design
Russia СП 14.13330.2018 Building norms and regulations: Construction in seismic regions
Saudi Arabia SBC 301 Saudi Building Code, Loads & Forces Requirements
Taiwan CPA 2011 Seismic Design Code and Commentary for Buildings
Turkey TBEC-2018 Turkey Buildings Earthquake Standard
United States IBC per ASCE 7 International Building Code—IBC
CBC per ASCE 7 California Building Code—CBC
UFC per DoD Uniform Facilities Criteria—UFC

Responsibility for Mitigation of Seismic Damage

The HVLcc equipment is considered a nonstructural building component as defined by regional building codes and seismic design standards. Equipment capacity was determined from tri-axial seismic shake-table test results in accordance with the International Code Counsel Evaluation Service (ICC ES) Acceptance Criteria for Seismic Certification by Shake-Table Testing of Nonstructural Components (ICC-ES AC156).

An equipment importance factor, Ip, that is greater than one (Ip > 1.0) is assumed and indicates that equipment functionality is required after a seismic event and after seismic simulation testing. This importance factor is applicable for designated seismic systems (i.e., special certification) servicing critical infrastructure and essential buildings where post-earthquake equipment functionality is a requirement.

Seismic certification of nonstructural components and equipment by Schneider Electric is just one link in the total chain of responsibility required to maximize the probability that the equipment will be intact and functional after a seismic event. During a seismic event the equipment must be able to transfer the inertial loads that are created and reacted through the equipment’s force resisting system and anchorage to the load-bearing path of the building structural system or foundation.

Anchorage of equipment (i.e., nonstructural supports and attachments) to the primary building structure or foundation is required to validate seismic conformance. The construction site structural engineer or engineer of record (EOR) or the registered design professional (RDP) is responsible for detailing the equipment anchorage requirements for the given installation. The installer and manufacturers of the anchorage system are responsible for assuring that the mounting requirements are met. Schneider Electric is not responsible for the specification and performance of equipment anchorage systems.

Tie-down Points for Rigid Floor Mounted Equipment

The equipment enclosure provides anchorage tie-down points to accept anchor attachments to the building structure or foundation. Indoor and outdoor enclosures provide enclosure base frame clearance holes for bolted anchorage attachments as shown in job drawings.

Equipment installations of single, stand-alone sections must be anchored using all enclosure tie-down points as shown in job drawings for indoor and outdoor applications respectively. Equipment installations of multiple-section lineups (2 or more HVLcc units bolted together) require every tie-down point to be used and specifics will be shown in the job drawings.

Equipment installations using welded supports and attachments in lieu of bolted supports and attachments must ensure the weld locations are distributed similarly to the locations of enclosure anchorage clearance holes. Welded supports and attachments must be properly sized to ensure the weldment withstand capacity exceeds the earthquake demand at location of equipment installation. Precautions shall be made to properly vent and shield the equipment enclosure during the field welding process. Schneider Electric is not responsible for equipment damage caused by field welded supports and attachments.

Anchorage Assembly Instructions

The bolted anchor assembly view depicted in job drawings illustrates the equipment’s as-tested attachment to the seismic shake-table test fixture. The equipment seismic rated capacity, as stated on the Schneider Electric CoC, was achieved with the identified size and grade attachment hardware. For bolted attachments, the use of factory supplied Belleville conical spring washers, where specified in job drawings, are required to maintain seismic conformance. Field installed equipment attachment and support detailing shall be in accordance with the anchorage system requirements as defined by the construction site EOR or RDP.

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