Page 33: of Maritime Reporter Magazine (October 15, 1980)
Review (continued from page 30) previous one, had very good ig- nition properties. Second, a per- fectly normal picture regarding engine cleanliness showed up at all inspections. Up to 10 percent load, absolutely nothing hap- pened; at 10 percent load at full rpm, slight blackening occurred in the inlet passage, which dis- appeared after brief full-load op- eration.
These trials have only recently been completed and many details still have to be evaluated. Sum- marizing the test results, SWD reports that, although the conse- quences of using "future fuels" must not be underestimated, their design characteristics place the
TM 410 and TM 620 engines in a favorable starting position for being able to burn these products in a reliable manner.
Sulzer Brothers Limited
The keen interest shown in Sul- zer's complete RL engine family is reflected by the continuous flow of new orders for these types.
Some of the latest orders for the newly introduced RL 66 and RL 76 engines, as well as for the
RLB ratings, received up to May 1 this year demonstrate the success of this design.
One 6RL56 engine, to be built in Sulzer's own factory in Winter- thur, Switzerland, with a rating of 9,000 bhp at 170 rpm will pow- er a 20,000-dwt products carrier ordered by Misano Soc. di Navi- gazione, Ravenna, from Nouvi
Cantieri Apuania, Marina de Car- rara, Italy.
Of nine 6RLA66 engines, six with a rating of 11,100 bhp at 124 rpm and three with a rating of 11,850 bhp at 136 rpm, three will be built by Mitsubishi, one by
IHI, and four by Sumitomo for different clients, and one engine will be built by Sulzer for an oceangoing self-unloader ordered by Canada Steamship Line of
Montreal from Collingwood Ship- yard, Ontario, Canada.
Three 7RLA66 engines with a rating of 12,950 bhp at 124 rpm will be built by Mitsubishi; one of these is destined for a 35,000- dwt tanker ordered from Imbari
One 6RLA76 engine with a rating of 14,700 bhp at 106 rpm will be built by Horton or Nor- way to power a 30,000-cubic-me- ter LPG/Ammonia/VCM carrier ordered by Sig. Bergesen d.y. of
Oslo from the Norwegian ship- yard Moss Rosenberg Verft A/S.
And one engine with a rating of 14,400 bhp at 122 rpm will be built by IHI.
With the continued success of the RLA90 and RLA56 engines, the above listed additions brought the total number of RL engines on order to exactly 100.
Shipbuilders in nations where oil was in short supply adopted the diesel alternative years ago.
Today, more than half of the new commercial ships over 1,000 gross tons entering American service have followed suit—an indication of a new maritime era of energy economics.
Delaval R and RV four-cycle diesel engines operating in the 450-rpm range have achieved a long and successful record pow- ering vessels from tugs to tank- ers for many years under the fa- miliar product name Enterprise.
As early as the 1940s, the orig- inal configuration was modified by the Maritime Commission to burn heavy fuel.
Now providing the highest horsepower rating of any medium- speed diesels manufactured in the
U.S., this family of reliable en- gines is well suited for its ex- panding role in marine service.
Its units are more rigid and rugged, shorter in length, con- servatively rated, and have ex- cellent maneuvering control flex- ibility and lower lube oil con- sumption.
Six Delaval RV-12 engines, each rated at 7,800 bhp, will power the three bulk carriers under con- struction at Levingston Shipbuild- (continued on page 34)
Critical motors and generators represent a substantial invest- ment for all shipping companies.
Until now, no protection was available for idle electrical machinery when moisture, salt, oil and grease break down insula- tion resistance.
Failsafe, a new early warning device, steps in with comprehen- sive protection that promises to slash operating budgets for all ships. Failsafe is a compact add- on unit easily mounted by a qualified electrician within starter enclosures or switch- boards with no modifications. By measuring insulation resistance between windings and earth, the unit ensures constant surveillance, tripping an alarm when resistance levels fall below pre-set requirements, and pro- viding start prevention or start prevention with emergency over- ride as two important options.
Maintenance crews are alerted to low resistance by this early warning device. First startup could be the last before a spot burnout; instead of expensive rewindings and costly delays, a simple maintenance procedure can virtually eliminate burnouts of this nature for years to come.
A recent experience on board
Marine Bulk Carriers' Morazan out of Miami illustrates the cost- effectiveness of Failsafe. When the Failsafe unit on a cargo boom motor alerted the maintenance crew to a problem, a simple maintenance procedure was followed and the problem was solved. "We were right on schedule," says company presi- dent S. Ziv. What began as a first- stage protection of 14 of the
Morazan's motors has swelled to a complete commitment to pro- tect all motors and generators. "With the savings it brings in both repair costs and downtime,"
Ziv concludes," Failsafe is a real boon to the maritime industry."
The versatility of Failsafe ap- plications covers a wide maritime market. AC motors operated by starter, contractor or shunt-trip circuit breakers and generators up to 600V can be protected. High voltage units up to 13.8 KV will be available for off-shore platforms.
Full details of this significant pro- tection device are available from the manufacturer, Marine Safe
Electronics of Canada Ltd.. 101
Jardin Dr., Concord, Ont.. Can.
Caused by Insulation Breakdown
Ask about our
The Problem The Solution
Failure of insulation is far and away the primary cause of burnouts in modern AC machines. While ship- board motors and generators are idle, their insulation is subject to con- tinuous contamination and degrada- tion. The burnout, when it comes, usually occurs a few seconds after start up. When it is an essential motor or generator, the costs are enormous:
Expensive rewinding is needed and delays and safety hazards result — which all add up to unscheduled downtime and over-budget expen- ditures.
The PAIUAPE Motor/Generator Pro- tector is an Early Warning device for most AC motors and generators. The compact, solid state unit continuously monitors insulation resistance in the idle machine. When it falls below a pre-set level (e.g. 1 meg), FAIISRFE triggers an Early Warning alarm and/or prevents starting. Any maintenance crew can then clean dry and revarnish the coil as necessary. Preventive maintenance forestalls the burnout and its in- evitable delays, frustrations and over-budget expenditures!
Approved and Accepted by:
The PflllfflPC Motor/Generator Protector (Patent Pending) is approved and/or ac- cepted by American Bureau of Shipping (ABS), U.S. Coast Guard, Lloyd's Register of
Shipping, Germanischer Lloyd, Det Norske Veritas and is U.L. — listed.
For free complete Technical Data, contact
MARINE SAFE ELECTRONICS j^^^^^^^jof Canada 3td 101 odrdin Drive. Concord (Toronto! Ontario Canada L4K 1B6
Telex 06-964696 Telephone: (it8) 669-5250
Arnessen Marine Systems, inc.
One Battery Park Plaza
New York, N.Y. 10004 Tel: (212) 425-7900
Cable: ELECRAFT. N.Y. Telex: 22 2028
October 15, 1980 33