Rolls Royce 97293 Noratel N8002 ULHA Marine Transformer

Rolls Royce 97293 Transformer Noratel N8002 ULHA

The Rolls Royce 97293 Transformer (Noratel model N8002 ULHA) is an industrial and marine heavy duty ultra reliable power isolation transformer. Designed to endure the rigors of the marine environment, this dry-type transformer provides precision voltage stepping and system isolation for essential control circuits, navigation facilities and auxiliary marine propulsion sub-systems. Thanks to Noratel’s characteristic premium winding geometries and innovative thermal management, it reduces core losses and maintains stable voltage even when loads on the marine grid are variable.

Model Details

• Brand: Noratel / Rolls-Royce Marine
• Model Number: N8002 ULHA
• Rolls-Royce Part Number / MPN: 97293
• Product Type: Single-Phase Marine Isolation & Control Transformer

Technical Specifications: Rolls Royce 97293 Transformer

Key Features

1. Marine-Grade Environmental Shielding: Vacuum-impregnated core and high-grade varnish coating insulate against high moisture, salt spray, and typical onboard vibrational stress.
2. Ultra-Low Heat Architecture (ULHA): Advanced internal configuration minimizes thermal dissipation, eliminating the risk of overheating in enclosed electrical cabinets.
3. Ruggedized Terminal Allocations: Heavy-duty, shock-resistant screw terminals ensure tight connections that resist vibration-induced loosening common in marine propulsion environments.
4. High Dielectric Strength: The system provides true electrical isolation, protecting sensitive downstream marine electronics from dangerous harmonic distortions and spikes.
5. Low Core Losses: Optimized grain-oriented silicon steel core construction provides high efficiency and minimal idle energy consumption.

Applications

• Marine Propulsion Control Systems: Provides stable voltage delivery to Rolls-Royce marine thrusters, steering gear controllers, and automation platforms.
• Bridge & Navigation Consoles: Filters and regulates input power supply for RADAR, sonar, GPS, and communication switchboards.
• Industrial Enclosures & Machinery: Functions as a step-down control transformer within tight, unventilated industrial electrical enclosures.
• Auxiliary Marine Equipment: Supplies power to engine room ventilation controllers, oil mist detectors, and bilge pump starters.

Equipment Compatibility

Compatible Equipment: Rolls-Royce Marine thruster systems, Kamewa steering mechanisms, Ulstein automation bays, and Noratel industrial power distribution assemblies.

Part Number Cross-References:

• Rolls-Royce Marine: 97293
• Noratel ID: N8002
• Variant Suffixes: N8002-ULHA

Marine Engineer Inspection Note:

When replacing an older transformer unit within an enclosed bridge distribution box, always carry out a secondary baseline insulation resistance check (Megger test) across the primary-to-chassis and primary-to-secondary circuits before powering the unit up. Ocean humidity during prolonged storage can introduce trace surface condensation. If insulation resistance drops under 2 Megaohms, run a standard low-temperature space-heater dry-out cycle before placing the transformer back onto the active bus.

Maintenance Tips:

• Torque Settings: Double-check terminal screw torques after your first 48 running hours under thermal load. Vessel vibrations will quickly back off improperly set torque points, resulting in highly dangerous localized resistive heating at the contact terminal.
• Mounting Location: Keep the ULHA chassis positioned near low-lying ventilation inlets if mounted in closed decks, ensuring unhindered passive chimney air cooling loops.

Frequently Asked Questions

What does the “ULHA” suffix indicate on the Noratel N8002 transformer?

The ULHA suffix denotes “Ultra-Low Heat Architecture.” This means the unit is precision-wound with premium gauge copper and designed with modified air channels to ensure low outer casing operating temperatures, making it safe for tight industrial panels and marine automation cubicles.

Can the Rolls Royce 97293 transformer handle both 50Hz and 60Hz marine systems?

Yes. Most Noratel marine isolation and control transformers are rated natively to operate seamlessly across both 50Hz (standard European/International maritime grids) and 60Hz architectures without experiencing core over-saturation, provided the rated primary voltage limits are strictly respected.

Where can I access the official manual or datasheet PDF file for the Noratel N8002?

As a marine component built explicitly for specialized Rolls-Royce ship automation platforms, the comprehensive diagnostic scheme and terminal configurations are typically integrated directly into the master electrical blueprints of the vessel. Contact our technical team with your vessel hull number or thruster serial number to request targeted technical extraction PDFs.