Page 7: of Maritime Reporter Magazine (July 1992)

Electronics Update

Siemens Division Supplies

Integrated Electric Propulsion

System For B.C. Ferry

The Quebec-based Industrial Sys- tems Division of Siemens Electric

Ltd. has supplied an integrated elec- tric propulsion system (see Figure 1) for the newest British Columbia car ferry. Already in service, the 85- vehicle, 300-passenger MTV Queen of Capilano is the first of two such ferries for operation between Earl's

Cove and Saltery Bay in British

Columbia.

The electrical power at 4.16 kv is generated by three brushless 1,700- kw generators driven by Bergen Die- sels.

The MS21 medium voltage switchboard, which includes nine sections, distributes this energy to the propulsion motors and ship's service transformers. The three generator sections are provided with vacuum circuit breakers and the four propulsion motor sections and two transformer sections include vacuum contactors.

Each of the ship's four Z-drive propellers are driven by Siemens 900-kw propulsion motors. Siemens has provided ship's service trans- formers which supply the ship at 480 v.

All the control and protection equipment is located in the control and protection switchboard RS21.

This switchboard includes 6 Si- emens' SIMATIC PLCs to control

Markey Machinery Supplies

Hawser Winch For LOOP

Emergency Response Vessel

A Markey Machinery Co.,Inc., type DUSS-71 single drum hawser winch was provided to Edison

Chouest Offshore, Inc., recently for service aboard a new emergency response vessel built at North Ameri- can Shipbuilding and owned by

L.O.O.P. Offshore, Inc.

This single drum winch design has a capacity of 700 feet of 14-inch circumference synthetic line, and uses a two-speed hydraulic motor configuration to achieve line pulls up to 25,000 pounds with speeds of 0 to 200 feet per minute.

To accommodate the large brak- ing capacity requested by the cus- tomer, two self-energizing band-type brakes were used to produce a total capacity of 500,000 pounds. Brake air cylinders are integrated with the winch controls for automatic operation of each brake, and open design. Self-lubricating plas- tics, wear resistant materials, and heavy rolled stainless steel brake drums are used to keep mainte- nance to a minimum, while enhanc- ing the reliability of the winch.

On-call 24 hours a day, the

L.O.O.P. ERV must rely on this machine to perform at any moment, in all types of operating conditions.

Markey Machinery Company,

Inc., Seattle, has been supplying deck machinery for over 80 years.

For free literature detailing the deck machinery offered by Markey

Machinery,

Circle 75 on Reader Service Card diesels and generators, 15 micro- computer-based control and protec- tion devices and various instrumen- tation. All these controls are imple- mented in the power management system which provides control of the propulsion system.

The main machinery is checked by an alarm and monitoring system,

SIMOS 32C, collecting the signals from 450 different sensors.

The output of the system is con- nected to the two VDUs for alarms, one VDU for graphics and two print- ers, one for alarms and the other for data logging.

Siemens supplied a PC-based

Health Monitoring System used as the main tool for an optimal mainte- nance of the ship's main machinery.

At the same time, the fuel moni- toring system permits the ship's crew to optimize the fuel oil consumption.

The second ferry of the series is being commissioned by Siemens engineers at Vancouver Shipyards.

In addition, a Jumbo Class 470 car ferry under construction for B.C.

Ferries will be fitted with a com- plete Siemens electrical and auto- mated control system.

For free literature detailing the

Industrial Systems Division of Si- emens Electric,

Circle 74 on Reader Service Card

Type DUSS-71 Hawser Winch, S/N 15652, from

Markey Machinery Co., Inc. handwheels are provided for auxil- iary manual brake engagement. "Built for Strength and Durabil- ity," according to Markey, a tubular winch frame reduces the overall weight of the machine, and facili- tates winch maintenance with its

STEEL-SPRING

FLEXIBLE COUPLINGS

LO-REZ helical steel-spring couplings, with their low, constant and accurately-controlled torsional stiffness factors, provide excellent torsional characteristics for geared marine reciprocating propulsion systems, engine and reciprocating compressor drives of many vari- eties, locomotive drives, etc.

LO-REZ was one of the first coupling manu- facturers, 40 years ago, to recognize the im- portance of torsionally-soft couplings in power transmission systems, particularly in reciprocating, variable speed systems and those involving gearing.

HF (HUB-FLAIMGE) ARRANGEMENT

STEEL-SPRING

VIBRATION ISOLATORS

BR4-LS

LO-REZ manufactures a broad line of sturdy steel-spring vib- ration isolators. The BR series isolators (shown here) with their ample thrust capacity and rubber-cushioned, adjust- able stops (to limit excess ver- tical excursion) are widely used for marine auxiliary, other mobile and seismic applications. No external chocks are required. BR-T series isolators have spe- cial spring-loaded thrust housings to carry the full propellor thrust effects, the full engine torque, and still provide excellent isolation. They are ideal isolation supports, also, for machinery rafts in ships.

With the growing demand for acoustical and vibration attenuation treatment in ships, the isolation of main propulsion engines is fast becoming a necessity rather than a luxury. LO-REZ has many years of experience in analyzing the dynamics of soft-mounted propulsion engines, and has the products to provide integrated iso- lation systems which include two-directional thrust-type RT flexible couplings for the gear output shaft.

VISCOUS TORSIONAL

VIBRATION DAMPERS

LO-REZ manufactures both the conventional un- tuned viscous dampers and its new patented mechanically-tuned viscous dampers. Extensive research has shown that the single and compound tuning methods, as developed by LO-REZ, reduce resonant amplitudes by some 40% and 60%, res- pectively, of the untuned values.

Aluminum alloy ribbed housings of robust design provide cooler operation with less variance be- tween cold and hot performance. Dampers are bolted construction and are serviceable with facto- ry rebuild program. LO-REZ forced-damped com- puter program handles very large and complex power trains and provides for optimization of damper size and characteristics. Standard damper sizes are available as well as custom-engineered models.

Designed & Manufactured by

LO-REZ VIBRATION CONTROL LTD. 156 WEST 8th AVE., VANCOUVER, B.C., CANADA V5Y 1N2 • TEL. (604) 879-2974 • FAX (604) 879-6588

Circle 222 on Reader Service Card

July, 1992 35