N-2NSPI (NSEB) RIR 1 to 16 - Redacted
4 passages
CI C0080101 – 539N-210 Big Island Subsea Cable Replacement (NSEB M12799) NSPI Responses to NSEB Information Requests 1 Request IR-1: 2 3 (a) Please explain the voltage and capacity of the primary circuit on Big Island. 4 5 (b) Please ident...
AI summary The document outlines responses to information requests regarding the Big Island Subsea Cable Replacement project. It details the voltage and capacity of the existing power supply, the number of customers, the absence of substations or switching facilities, and the lack of required system upgrades. It also requests details on the type, number, and technical specifications of the new subsea cables, as well as georeferenced maps.
• ANSI/NEMA WC 74/ICEA S-93-639 5-46 kV Shielded Power Cable for Use in the Transmission and Distribution of Electric Energy • ICEA S-94-649 Standard for Concentric Neutral Cables Rated 5 through 46 kV • AEIC Standard CS8 Specification for...
AI summary The document outlines technical standards for power cables and discusses NS Power's plan to retain existing subsea cables as a redundancy. It also mentions the preparation for permit applications and the potential use of a diesel generator as an interim power supply option in the event of cable failure.
NON-CONFIDENTIAL 1 Request IR-8: 2 3 (a) Please provide a table that lists the past five years of load records for Big Island, 4 including but not limited to peak and average demand, as well as the load forecast 5 over the expected service...
AI summary The response to Request IR-8(a) indicates that direct metering data is unavailable for the asset in question, but AMI data from 2022 provides peak load estimates. For IR-8(b), technical details on the new cable are referred to IR-2(b), while information on the 1990 cable is referred to IR-4(a). The 1977 cable's specifications are not available.
2 (e) A subsea cable installed in a sheltered harbour presents lower lifecycle risk and higher 3 reliability than land-based alternatives by avoiding the exposed causeway environment. 4 Overhead lines are subject to wind, ice, and storm su...
AI summary The text compares the reliability and risk of subsea cables installed in sheltered harbors to land-based alternatives, noting that subsea cables face lower lifecycle risks due to isolation from surface storm forces, while overhead lines and trenched underground cables are more vulnerable to environmental factors.
N-3NSPI (NSEB) RIR 17 to 18
6 passages
6 13 14 NS Power would propose to utilize excavators and backhoes to construct underground 17 20 (b) NS Power's preliminary route for the trenched underground land cable, which would be subject to change, would extend from the termination...
AI summary NS Power proposes to construct trenched land cables using excavators and backhoes, with a 5 km underground trench alignment along Big Island Road. The cable will be buried approximately 1,000 mm deep and installed using a conventional open-trench method with a concrete duct bank encasement to minimize environmental impact.
18 (d) Please refer to the table below comparing the technical specifications of the subsea cable 19 and the land cable. Subsea Cable Land Cable Voltage 28kV 15kV Conductor 2/0 AWG – Copper 3/0 AWG - Aluminium Semi-conducting non-metallic...
AI summary The text provides a comparison table of technical specifications between a subsea cable and a land cable, highlighting differences in voltage, conductor materials, insulation, shielding, and other physical characteristics.
Note 2: Small differences in totals are attributable to rounding. 1 Request IR-18: 2 3 In response to IR-10 (d) (i), NS Power provided a comparison table for all three options based 4 on seven criteria. 5 6 (a) For the criterion "Reliabili...
AI summary The document discusses a comparison of reliability and service continuity for two cable options: Subsea Cable and Underground Cable Causeway. It outlines the ratings and definitions for each option, noting potential issues with fault location and repair times, particularly for the Underground Cable Causeway.
(ii) NS Power does not conduct routine post weather-event condition assessments of the subsea (marine) portion of the cable route. Following a fault or outage on a distribution feeder, inspection activities are focused on overhead infrastr...
AI summary NS Power does not routinely inspect the subsea portion of cable routes after weather events, focusing instead on overhead infrastructure following faults or outages. For underground cables, inspections are conducted only in response to faults or identified issues. Subsea repairs require specialized marine resources and established diagnostic methods.
oint the fault. Once identified, the damaged section of cable is isolated, removed, and replaced by splicing in a new section of cable from available spares inventory using proven jointing techniques. Historically, repairs to subsea cables...
AI summary The text discusses the process of repairing damaged subsea cables, including isolating and replacing damaged sections with spares using jointing techniques. It notes that repairs are infrequent due to strong in-service performance and that the decision to repair or replace depends on site conditions, damage extent, and logistical constraints.
1 2 (iv) Yes. As part of the project, NS Power plans to procure additional spare cable and 3 associated accessories to support timely response in the event of a cable failure and 4 to improve repair lead times. Furthermore, the new cable i...
AI summary NS Power plans to procure additional spare cable and accessories to improve response times and repair lead times in the event of a cable failure. The new cable installation will follow established risk mitigation practices, including appropriate routing and burial depth. Faulty cables are isolated, tested, and repaired using approved methods, followed by integrity testing.