Zollner Zet Horn 90AC Complete New Crankcase with Electric Motor

Zollner Zet Horn 90AC Complete New Crankcase With New Electric Motor

The Zollner Zet Horn 90AC Complete New Crankcase with New Electric Motor represents a factory-fresh, heavy-duty propulsion and actuation assembly engineered specifically for Class I marine vessels exceeding 200 meters in length. As the core mechanical driving center of the renowned Zöllner Zet-Horn 90AC electric piston whistle, this unit converts rotational energy from a high-torque 3-phase AC motor into precision linear piston oscillations via heavy-duty gearwheels, a robust crankshaft, and a high-alloy connecting rod.

Built completely from seawater-resistant, non-corrosive materials, this replacement assembly guarantees compliance with COLREGS 1972 Annex III, delivering an uncompromised 143 dB sound pressure level at a fundamental frequency of 90 Hz. Ideal for shipowners and superintendent engineers conducting major overhauls or emergency replacements, this assembly is supplied in pristine condition to eliminate downtime and ensure immediate regulatory compliance.

Model Details

• Manufacturer: Zöllner Signal GmbH (Kiel, Germany)
• Product Series: ZET-Horn 90 AC
• MPN (Manufacturer Part Number): ZH-90AC-CRK-MOT (Standard Zöllner Assembly Specification for 90AC Crankcase & Flange Motor)

Technical Specifications

Compatibility

• Compatible Equipment Models: Zöllner ZET-Horn 90 AC Complete System, Zöllner Control Box 4476 / 4476.1
• Vessel Types: Container ships, oil tankers, LNG carriers, bulk carriers, and passenger liners ≥ 200 meters in length.
• Industrial Land Installations: High-noise environment installations including nuclear and thermal power plants, oil refineries, LNG terminal bunker stations, and large-scale factory complexes.

Part Number Cross-References

• Zöllner OEM Part Number: ZH-90AC-CRK-ASSY
• Motor Assembly Cross-Reference: Zöllner 5.5 kW Flange-Mounted Marine Motor for 90AC
• Associated Sub-Component Reference IDs: Crankshaft (Part 110), Connecting Rod Bearing (Part 290), Gearwheel Set (Part 130)

Key Features

1. Genuine OEM Precision: Supplied as a completely factory-matched crankcase and electric motor unit, eliminating on-site clearance alignment issues.
2. Rapid Transient Response: High-torque flange-mounted motor achieves full operational piston frequency in under 0.15 seconds from signal release.
3. Extreme Weather Survivability: Includes built-in 250W anti-condensation motor heating elements designed to prevent moisture accumulation during freezing maritime transits.
4. Simplified Maintenance Architecture: Vertically suspended cylinder layout paired with standard high-grade grease lubrication (no complex oil pumps or fluid lines required).
5. Harmonic Penetration Design: Generates a broad frequency spectrum with strong overtones designed to cleanly cut through high background noise levels on deck.

Applications

• Primary maneuvering and fog-signaling whistle assemblies on commercial ocean-going vessels ≥200 meters.
• Retrofitting aged, corroded, or seized crankcase mechanisms during scheduled dry-dock intermediate or special surveys.
• Emergency warning systems across heavy industrial chemical plants and coastal oil terminal facilities.
• Upgrading land-based public address and disaster warning setups requiring marine-grade ruggedness.

Frequently Asked Questions

What vessels are legally required to use the Zollner Zet Horn 90AC?

The Zet Horn 90AC is specifically engineered and type-approved for Class I vessels that are 200 meters or more in length, fulfilling all international collision regulations (COLREGS 1972, Annex III).

Does this replacement unit include both the mechanical crankcase and the motor?

Yes. This product is supplied as a complete, integrated assembly featuring a factory-new crankcase housing, precision gear train, connecting rod, and a matched 3-phase electric motor.

What kind of routine maintenance does the Zet Horn crankcase require?

The mechanical assembly requires minimal maintenance. Grease levels in the gear chamber and bearings should be checked every 3 to 6 months, and the grease completely renewed during 5-year dry-dock cycles. No fluid oil changes are needed.

Is voltage fluctuation an issue for the 90AC motor?

No. The system is designed to withstand normal shipboard voltage and frequency variations of up to plus or minus 20% without experiencing a drop in sound pressure intensity.