BESS_Functional_Specifications_080522.pdf

BESS Functional Specifications

Step-Up Transformer

I. Functional Description

Step-Up Transformer (XFMR) will interface to Pasadena Water and Power (PWP) Power

Delivery 35 kV primary subtransmission system. Interconnection of XFMR will be to Glenarm

Receiving Station D (RSD) 35 kV open-air rack. A new 35 kV circuit breaker is targeted for installation in Glenarm RSD rack, along with new 35 kV circuit (1000 kcmil copper cable) routed to location of BESS. New 35 kV circuit shall be terminated to new 35 kV metal-clad switchgear and associated circuit breakers installed at BESS site. Protection of new XFMR and

35 kV circuit will be based on combination of protective relays installed at both Glenarm RSD and BESS sites.

II. Standards

All characteristics, definitions, and terminology shall be in accordance with the latest revision of the following American National Standards Institute (ANSI), Institute of Electrical and

Electronics Engineers (IEEE), National Electrical Manufacturers Association (NEMA), and

American Society for Testing and Materials (ASTM) standards.

a. C57.12.00 – Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers

b. C57.12.10 – Standard Requirements for Liquid-Immersed Power Transformers

c. C57.12.70 – Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers

d. C57.12.80 – Standard Terminology for Power and Distribution Transformers

e. C57.12.90 – Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating

Transformers

f. C57.19.01 – Standard for Performance Characteristics and Dimensions for Power

Transformer and Reactor Bushings

g. C57.91 – Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage

Regulators.

h. IEEE 693 - IEEE Recommended Practice for Seismic Design of Substations

i. ASTM D3487 - Standard Specification for Mineral Insulating Oil Used in Electrical

Apparatus

j. NEMA TR 1 – Transformers, Regulators, and Reactors

III. General

a. Number of Phases: Three (3)

b. Coolant: Inhibited Mineral Oil

c. Cooling Class: ONAN / ONAF

d. Frequency: 60 Hz

e. Altitude: 0 to 3,000 feet above sea level

f. Winding Material: Cooper

g. Temperature Rise: 65 degrees Celsius

h. External Paint Color: ANSI 61 Light Gray

IV. Transformer Winding

a. Primary Voltage: 35 kV (line-to-line)

b. High Voltage Taps: +5%,+2.5%, Rated, -2.5%, -5%

c. Primary Phase BIL: 200 kV

V. Bushings

a. Primary Bushing Location & connection: side mounted in oil-filled compartment with terminators for cable entrance from beneath.

b. Cables per phase: 1 or 2 - 1000 kcmil copper

c. Under oil cable terminators/connectors/bushings to be provided

VI. Current Transformer

a. Primary bushing

b. Primary hot spot

c. Secondary hot spot

d. Low voltage neutral

VII. Tests

a. All tests procedures shall comply with C57.12.90.

b. Audible sound tests per C57.12.90. The average sound level of the transformer when energized at normal voltage and frequency, and at no load, shall be 6 dBA below that of the equivalent two-winding transformer in accordance with the NEMA TR-1 Standards.

VIII. Short Circuit Capabilities

a. The transformer covered by this Specification shall meet the short circuit qualification requirements of ANSI Standard C57.12.00. The transformer shall be capable of withstanding without injury or loss of life, the mechanical and thermal stresses caused by short circuits on the external terminals of any winding, with rated voltage maintained across the terminal of all other windings provided the symmetrical and asymmetrical currents (rms) do not exceed the currents specified in ANSI Standard C57.12.00 for the duration specified thereof.

IX. Seismic Withstand Requirements

a. The transformer shall be qualified according to the requirements of IEEE Standard 693. The transformer shall meet the requirements of the high seismic qualification level. Frequency modifying devices shall not be allowed.

b. Manufacturer shall submit along with drawings for approval a statement attesting to compliance with the seismic requirements of this Specification. This statement of compliance shall be signed by a duly authorized representative of Manufacturer and a registered professional engineer.

X. De-energized Tap Changers

a. High and low voltage winding de-energized tap changers shall be provided.

XI. Transformer Control Cabinet

a. The control cabinet shall be weatherproof with double doors, have provisions for locking and located in segment 3 and within reach of a person standing at the transformer base level. Doors shall be hinged and provided with stops to hold the doors in open position until manually released. Minimum clearance from base line to bottom of cabinet shall be

24 inches.

b. Heaters shall be provided in all control cabinets to prevent excessive moisture accumulation in the cabinet.

c. Interior illumination shall be provided and shall be controlled by a toggle or door activated switch and shall be protected by a removable guard.

d. A ground fault interrupter duplex receptacle rated 20 amps at 120V AC with manual reset trip shall be provided in the control cabinet.

e. All wiring shall be type XHHW or SIS standard copper conductor. Minimum wire size for bushing current transformer secondary wires shall be #10 AWG. Minimum wire size for control, alarm & monitor wiring shall be #12 AWG. Wiring traversing hinge side of swing panels shall be extra flexible type bundled accordingly and protected to prevent pinching or sharp bending. Insulation voltage class for all wiring in the control cabinet shall be 600VAC.

f. "Wire nut", "wing nuts" or "splice cap" connectors are not permitted. Wrap around wire markers may be used as a manufacturer option.

g. Connectors for all wire terminations shall be Burndy ring tongue, compression type with an insulating sleeve over the barrel of the connector or AMP PIDG insulated ring terminals. Soldered terminals or connectors shall not be used for wiring. No more than two (2) wires shall be connected to an equipment terminal or terminal block pole.

h. Wiring inside the control cabinet shall be installed in Panduit plastic wiring duct. The duct shall be filled to a maximum of 50% of the cross sectional area.

XII. Transformer Monitoring System

a. The following parameters shall be interfaced to monitoring system:

i. Main tank liquid temperature

ii. Secondary winding temperature

iii. Liquid level main tank

iv. Main tank pressure

v. Nitrogen cylinder pressure

vi. Other transformer alarms

b. SCADA connectivity

i. Serial and Ethernet Ports

ii. DNP 3.0 serial and LAN/WAN support

XIII. Dissolved Gas Analysis (DGA) on-line analyzer

a. Multi-Gas and moisture monitoring capability.

b. SCADA connectivity

i. Serial and Ethernet Ports

ii. DNP 3.0 serial and LAN/WAN support

XIV. Rate of Rise Sudden pressure relay system

XV. Liquid level indication

a. Wired to Transformer Monitoring System.

XVI. Winding temperature sensors

a. Wired to Transformer Monitoring System.

XVII. Fiber optic arc sensing and temperature sensors

a. Number of installed sensors shall be based on Manufacturer analysis, likely fault occurrences, and hot spot industry standards.

b. Wired to Transformer Monitoring System.

XVIII. Forced Transformer Cooling

a. Fans shall not be mounted directly to cooling fins of the radiators. Bottom mounting of fans is acceptable if there is no safety risk and no risk of debris being sucked into fans.

b. All fans shall be equipped with guards having not more than 1/2 inch spacing in accordance with OSHA requirements. All fans shall be designed for outdoor use and have self - resetting thermal overload protection.

XIX. Pressure

a. Transformers shall deploy positive pressure inert gas system and shall have necessary pressure-vacuum bleeder, pressure-vacuum gauge, gas sample devices and gas pressure alarms for the transformer and a low-pressure alarm for the gas cylinder.

b. Nitrogen for oil preservation shall be fed with a separate control valve rated for full vacuum.

XX. High Voltage Transformer bushing

a. Under oil in separate sealed compartment

b. Tank wall mounted bushings shall be enclosed in an oil-filled compartment mounted on the side of the transformer. The bottom of the compartment will be at least 84 inches above ground.

XXI. Current transformers

a. Bushing current transformers are to be internally mounted, multi-ratio, with the secondary winding between each pair of adjacent taps distributed around the entire core.

b. The manufacturer shall supply all bushing current transformers with a thermal-rating factor of 2.0 on all taps. Manufacturer shall state on the proposal form what the thermal rating factor is for each tap on each size of bushing current transformer required.

c. The leads of each current transformer shall be brought out to the control cabinet and terminated on short circuiting terminal blocks.

XXII. Main Tank Oil System

a. The oil preservation system is one in which the interior of the transformer (by means of a positive pressure of inert gas maintained from a separate inert gas source and reducing valve system) is sealed from the atmosphere.

b. Nitrogen cylinder and all associated equipment shall be enclosed in a weatherproof cabinet mounted on the transformer. Nitrogen cylinder fittings shall use SAE threads for nitrogen bottles. Nitrogen cabinet shall be at ground level.

XXIII. Main Tank

a. The main transformer tank and any attached compartments that are subject to operating pressures shall be designed to withstand, without permanent deformation, pressure 25% greater than the maximum operating pressures resulting from the system of oil preservation used.

b. The transformer nameplate shall comply with the requirements of C57.12.00.

c. The transformer tank & oil filled compartment with the exception of expansion tanks shall be designed for vacuum filling (full vacuum) in the field.

XXIV. Transformer Painting

a. The exterior paint system shall meet the requirements of ASTM 117 (latest edition) Salt

Spray Test.

b. The transformer shall be painted ANSI #61 Light Gray, and the cover shall have a non-skid finish.

XXV. Documentation

a. Transformer Outline Drawings

b. Transformer Base Outline

c. HV and LV Bushing Outlines

d. Oil Pump Outline

e. Assembly Drawings

f. Transformer Nameplate

g. CT Excitation Curves & Nameplate

h. Component Instruction Books

i. Parts Bulletins

j. Electrical Schematic Diagrams

k. Electrical Wiring Diagrams

XXVI. Spare Parts

The manufacturer shall submit recommended spare parts for transformer for an expected ten

(10) year operation.

XXVII. Delivery and Shipping

a. The contractor shall be responsible for full freight and off-loading.

BESS 35 kV Metal-Clad Switchgear (primary side of Step-Up Transformer)

I. Functional Description

New 35 kV metal-clad walk-in switchgear with 35 kV circuit breakers will be installed at BESS site on the primary side of Step-Up Transformer. The switchgear and circuit breaker will be located in a non-coastal environment at an elevation of ±760 feet Above Sea Level (ASL).

The next higher voltage class breaker may be utilized if required to meet the interrupting requirements specified herein, or if needed to accommodate the specified bushing current transformer requirements. SF6 is not permitted as an insulating medium.

II. General

a. Number of Phases: Three (3)

b. Voltage Class: 35 kV / 38 kV (maximum)

c. Basic Impulse Level: 200 kV (minimum)

d. Frequency: 60 Hz

e. Altitude: 0 to 3,000 feet above sea level

f. Continuous Current: 2000 Amperes

g. Interrupting: 40,000 Amperes (sym rms)

h. Closing and Latching: 104,000 Amperes (peak)

i. Interrupting Time: 50 ms (60 Hz basis)

j. Type: Circuit Breakers installed in Walk-In Metal-Clad Switchgear

k. Function: Draw-out circuit breakers

l. Circuit Breakers:

i. One (1) circuit breaker connected to incoming PWP 35 kV circuit.

ii. One (1) circuit breaker connected to Step-Up Transformer primary.

m. Current Transformers for each circuit breaker

i. Supply side: Two (2) protection CTs

ii. Line side: One (1) protection CT and one (1) metering CT

n. Potential Transformer: 3-Phase Wye / 34500:115 VAC

i. PWP 35 kV circuit breaker

ii. Step-Up Transformer circuit breaker

iii. Common Bus

o. PWP 35 kV Circuit Protection: Line Current Differential

p. Switchgear Protection: Bus Differential and backup over-current

q. Circuit Breaker Protection: over-current

r. Switchgear Metering

i. PWP 35 kV circuit breaker

ii. Step-Up Transformer circuit breaker

III. National Standards

The equipment furnished under these specifications shall be designed, constructed, and tested to meet all of the applicable requirements of IEEE (Institute of Electrical and Electronics

Engineers), ANSI (American National Standards Institute), ASME (American Society of

Mechanical Engineers), American Welding Society (AWS), and NEMA (National Electrical

Manufacturers Association) Standards, all as last revised, unless stated otherwise in these specifications.

IV. Circuit Breaker Requirements

a. Operating Voltages

i. Closing and Tripping Control Voltages: 125 VDC

ii. Spring Charging Motor and heaters: 230 VAC

iii. Light and receptacle, single phase: 115 VAC

b. Switching Duty

The breaker shall be capable of switching capacitor banks, transformers, and transmission lines with reactive currents.

c. Switching Duty Cycle

Breaker shall be capable of an O – 0.3 seconds - CO - 15 s - CO duty cycle without derating. “O” denotes breaker open, and “C” closed.

d. Rating Structure

Except as specified herein, the circuit breaker rating structure and related capabilities shall comply with the applicable requirements of IEEE C37.04 through C37.09 and NEMA

SG4.

e. Forced Cooling

Fans or other forced cooling shall not be used in the design of the circuit breakers to achieve the specified continuous current ratings.

f. Ambient Temperatures

The breaker shall meet all performance requirements in ambient temperatures ranging from -15 to +50 degrees Celsius.

g. Transient Recovery Voltage

Transient Recovery Voltage (TRV) Test Duty shall be T100 per Table 14 of IEEE C37.04-

2018.

h. Tests

i. The circuit breaker shall receive and pass all production tests per IEEE C37.09, including a 60 Hz AC hi-pot test on the completely assembled 3-pole breaker.

Tests shall include:

1. Dry dielectric test of control wiring

2. Dry dielectric test of current transformers

3. Dry dielectric test of breakers

4. Operating voltage and current range for closing and opening

5. Cycles to close and open arcing contacts

6. Current transformer ratio and polarity

ii. A complete wiring and control circuit test and check shall be made with complete verifications of all circuits.

iii. Design tests shall be performed in accordance with IEEE C37.09 on one completely assembled circuit breaker, or certified test reports of such tests on a circuit breaker of the same design and rating shall be furnished.

iv. Circuit breaker shall be given the standard production tests as specified in IEEE

C37.09.

V. Metal-Clad Switchgear Requirements

The outdoor, heavy-duty, single-high, walk-in type metal-clad switchgear specified herein shall be designed, constructed, and tested to meet all of the applicable requirements of the latest

IEEE, ANSI, and NEMA standards unless stated otherwise in these specifications. The switchgear shall include a protected work aisle in front of the metal-clad gear. The base of the enclosure shall be a welded one-piece assembly/construction. The aisle/walk-in portion of the enclosure shall not have a separate base that is bolted to the gear. The aisle/walk-in shall be wide enough for all possible maintenance and repair access.

a. The switchgear shall be of arc-resistant type 2 construction and contain indicating equipment labeling.

b. Contractor shall complete an incident energy / arc flash study. Study shall be signed by a duly authorized representative of Manufacturer and a registered State of California professional engineer. Based on study results, switchgear shall be labeled with all applicable arc flash boundary (AFB), approach distance, and personal protective equipment (PPE) requirements.

c. Switchgear shall include remote racking devices for draw-out 35 kV circuit breakers.

d. Switchgear will allow for full closed door racking of draw-out 35 kV circuit breakers.

e. All insulation and spacing of live parts shall meet the requirements for power circuit breakers of the 38 kV class.

f. All parts of the switchgear structure, including that between phases, to ground, and across the open circuit breaker, shall be of an inherently stable nature and capable of withstanding continuous application of maximum design voltage. The mechanical strength and physical characteristics of the insulation structure shall be such that the structure will be able to withstand the shocks of circuit breaker operations within the breaker's ratings.

g. The switchgear specified herein shall consist of a stationary housing with horizontal draw-out vacuum circuit breakers and all necessary auxiliary equipment assembled on a frame forming a complete, self-contained, self-supporting switchgear assembly completely wired and tested to simulate primary and secondary service condition.

h. The circuit breakers, busses, instrument transformers, controls and relays, and cable entrances shall be isolated within separate compartments formed by fully enclosed dead front grounded sheet steel barriers.

i. All vacuum circuit breaker housing and linkage dimensions shall be held to close tolerances to permit easy and complete interchange ability of like breakers to any unit.

j. Each unit shall be designed to provide safe and convenient accessibility to all component electrical parts and equipment. Each isolating compartment shall provide complete protection against contact with live circuits in adjacent compartments when entered.

k. Removable rear sections shall be provided to permit entrance for primary and secondary cable installation, inspection, and maintenance during the initial installation or subsequent field maintenance period.

l. The switchgear shall be provided with a heating, ventilating, and air conditioning (HVAC) system. The HVAC system shall be sized to considerations of jobsite ambient temperatures, the dimensions and heat retention of the switchgear, and the heat dissipated by the electrical equipment inside the switchgear. Air conditioning equipment shall be capable of maintaining inside temperature of not more than 27oC (80oF). Thermostatically controlled heating elements shall maintain a minimum inside temperature of 13 oC (55 oF).

m. After the switchgear housings have been completely assembled they shall be thoroughly cleaned, smoothed, and "Bonderized" (or equivalent). Immediately after "Bonderizing" the units shall be sprayed with a preservative primer to seal and protect the "Bonderizing" treatment.

n. Potential transformers and fuses shall be mounted on draw-out disconnecting drawer, or trunnion type assemblies which, when withdrawn, disconnect both primary and secondary terminals and ground the high voltage winding.

o. The potential transformer enclosure shall be automatically closed off from the high voltage connection when the transformer and fuses are withdrawn. This barrier may be of the insulating or segregating metal type.

p. Switchgear shall be provided with an auxiliary power transformer protected by draw-out type current limiting fuse.

q. Switchgear shall be provided with both exterior and interior lights.

r. Contractor must perform production tests on the completed switchgear unit. These tests shall be in conformance with Section 5.3 of ANSI Standard C37.20.2-1987 or latest revision.

Three sets of the test reports shall be furnished to the Department. Manufacturer design test certification must also be furnished together with the production test reports.

VI. Seismic Withstand

a. The 35 kV circuit breakers and metal-enclosed switchgear shall be qualified according to the requirements of IEEE Standard 693. The breakers and support shall meet the requirements of the High Seismic Qualification Level. Frequency modifying devices shall not be allowed.

b. Manufacturer shall submit along with drawings for approval attesting to compliance with the seismic requirements of this Specification. This statement of compliance shall be signed by a duly authorized representative of Manufacturer and a registered State of

California professional engineer.

VII. Spare Parts

The manufacturer shall submit recommended spare parts for 35 kV circuit breakers and metal-enclosed switchgear for an expected ten (10) year operation.

VIII. Delivery and Shipping

The contractor shall be responsible for full freight and off-loading.

BESS Circuit Breakers and Metal-Clad Switchgear (secondary side of Step-Up Transformer)

I. Functional Description

New switchgear will be installed at BESS site on the secondary side of Step-Up Transformer.

Switchgear will be walk-in metal-clad type and will include main circuit breaker for entire lineup, feeder circuit breakers, protection relays / controls, and California Independent

System Operator (CAISO) telemetry / metering devices.

II. General

a. Frequency: 60 Hz

b. Altitude: 0 to 3,000 feet above sea level

c. Potential Transformer: 3-Phase Wye

d. Transformer Protection: Differential and backup over-current

e. Switchgear Protection: Differential and backup over-current

f. Feeder Protection: Primary and backup over-current

g. Transformer Protection: Transfer Trip to BESS 35 kV Switchgear

h. Metering: Separate metering for main circuit breaker, feeder circuit breakers, and CAISO devices.

i. Potential Transformers: separate potential transformers for main circuit breaker metering and CAISO devices.

III. National Standards

The equipment furnished under these specifications shall be designed, constructed, and tested to meet all of the applicable requirements of IEEE (Institute of Electrical and Electronics

Engineers), ANSI (American National Standards Institute), ASME (American Society of

Mechanical Engineers), American Welding Society (AWS), and NEMA (National Electrical

Manufacturers Association) Standards, all as last revised, unless stated otherwise in these specifications.

IV. Switchgear Requirements

New switchgear specified herein shall be designed, constructed, and tested to meet all of the applicable requirements of the latest IEEE, ANSI, and NEMA standards unless stated otherwise in these specifications.

a. The switchgear shall be of arc-resistant type 2 construction and contain indicating equipment labeling.

b. Contractor shall complete an incident energy / arc flash study. Study shall be signed by a duly authorized representative of Manufacturer and a registered State of California professional engineer. Based on study results, switchgear shall be labeled with all applicable arc flash boundary (AFB), approach distance, and personal protective equipment (PPE) requirements.

c. All parts of the switchgear structure, including that between phases, to ground, and across the open circuit breaker, shall be of an inherently stable nature and capable of withstanding continuous application of maximum design voltage. The mechanical strength and physical characteristics of the insulation structure shall be such that the structure will be able to withstand the shocks of circuit breaker operations within the breaker's ratings.

d. The circuit breakers, busses, instrument transformers, controls and relays, and cable entrances shall be isolated within separate compartments formed by fully enclosed dead front grounded sheet steel barriers.

e. Each unit shall be designed to provide safe and convenient accessibility to all component electrical parts and equipment. Each isolating compartment shall provide complete protection against contact with live circuits in adjacent compartments when entered.

f. Removable rear sections shall be provided to permit entrance for primary and secondary cable installation, inspection, and maintenance during the initial installation or subsequent field maintenance period.

g. The switchgear shall be provided with a heating, ventilating, and air conditioning (HVAC) system. The HVAC system shall be sized to considerations of jobsite ambient temperatures, the dimensions and heat retention of the switchgear, and the heat dissipated by the electrical equipment inside the switchgear. Air conditioning equipment shall be capable of maintaining inside temperature of not more than 27oC (80oF). Thermostatically controlled heating elements shall maintain a minimum inside temperature of 13 oC (55 oF).

h. After the switchgear housings have been completely assembled they shall be thoroughly cleaned, smoothed, and "Bonderized" (or equivalent). Immediately after "Bonderizing" the units shall be sprayed with a preservative primer to seal and protect the "Bonderizing" treatment.

i. Switchgear shall be provided with both exterior and interior lights.

j. Contractor must perform production tests on the completed switchgear unit. These tests shall be in conformance with Section 5.3 of ANSI Standard C37.20.2-1987 or latest revision.

Three sets of the test reports shall be furnished to the Department. Manufacturer design test certification must also be furnished together with the production test reports.

V. Seismic Withstand

a. Switchgear shall be qualified according to the requirements of IEEE Standard 693. The breakers and support shall meet the requirements of the High Seismic Qualification Level.

Frequency modifying devices shall not be allowed.

b. Manufacturer shall submit along with drawings for approval attesting to compliance with the seismic requirements of this Specification. This statement of compliance shall be signed by a duly authorized representative of Manufacturer and a registered State of

California professional engineer.

VI. Spare Parts

The manufacturer shall submit recommended spare parts for switchgear for an expected ten

(10) year operation.

VII. Delivery and Shipping

The contractor shall be responsible for full freight and off-loading.