New oil reduces stress

Shell lubricants companies have launched a range of new generation medium speed diesel engine oils to help operators overcome their biggest challenge – achieving high availability and reliability at the lowest possible running cost. Formulated to cope with all levels of oil stress, new Shell Argina will provide operators with unrivalled protection against oil stress (proven in field tests against leading industry diesel engine oils), reduced lubricant deposits and extended oil life.

Continuing the success of the existing Shell Argina range, new Shell Argina has been developed to cope with advances in engine technology and increasing operational demands. Bala Balachandran, power sector and brand manager for Shell Lubricants, explains: “Modern diesel engines are designed to use less oil, while coping with long, continuous operational hours at high output. Although this can provide operators with high levels of productivity and efficiency, it places more demand on oil performance and results in oil stress. This can compromise engine performance by increasing the risk of accelerated component wear and failure.”

The overall oil stress will include varying proportions of each, depending on the conditions
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Diesel engine oils are prone to three types of oil stress: acid, thermal and asphaltene. Acid stress can lead to Base Number (BN) depletion and accelerated engine ring, liner and valve wear. Thermal and asphaltene stress can cause oil viscosity increase and deposits on the piston undercrown and the ring groove.

Offering excellent resistance to deposits at high and low temperatures, high BN retention and high resistance to viscosity increase, the new Argina range will help operators to reduce oil stress by improving engine cleanliness. This helps to reduce piston wear, ring sticking, blow-by and liner damage resulting from deposit formation. Furthermore, it will help to reduce fuel pump sticking and crankcase fouling caused by asphaltene oil stress.

Prototype plant computer for CANDU

L-3 Communications MAPPS, a wholly owned subsidiary of L-3 Communications, has secured a contract from the CANDU Owners Group Inc. (COG) to manufacture a prototype plant computer system for CANDU nuclear power plants. Participating COG members in the deal are Ontario Power Generation, Bruce Power, Hydro-Québec and New Brunswick Power Nuclear Corporation, Korea Hydro & Nuclear Power Company, Nucleoelectrica Argentina S.A. and Romania’s Societatea Nationala Nuclearelectrica SA.

CANDU plant computer systems are commonly referred to as Digital Control Computers (DCCs) and the prototype system is coined “PDCCZ”. As part of building the PDCCZ system, L-3 MAPPS will use the current design of the DCC central processing unit and modify it to account for any component obsolescence issues, as well as upgrade some of the other DCC component designs as specified by COG. L-3 MAPPS will capture, update and document the design of the PDCCZ, since this will be used as a reference for all future DCC refurbishment projects. The PDCCZ system will reside at L-3 MAPPS’ Montreal facility and will be used to provide support to all participating COG members for up to 30 years.

DCC systems are used to monitor and control all the major reactor and power plant functions. While most major components for the DCCs have traditionally been supplied by L-3 MAPPS, this project represents an increase in L-3’s scope of supply as the company takes over the manufacturing rights of the DCC central processing unit from a third party.

New device is the appliance of science

S&C’s new IntelliRupter PulseCloser significantly advances the science of fault testing on overhead lines. It was designed from the ground up to accommodate advanced feeder automation functions such as IntelliTEAM II and the new IntelliTEAM III Automatic Restoration System, as well as SCADA.

IntelliRupter incorporates revolutionary new PulseClosing technology. To test for faults, PulseClosing applies a very fast, low-energy pulse to the line – significantly reducing damaging fault currents and voltage sags on the faulted line as well as adjacent feeders. Substation transformers will experience fewer through-faults, extending their life. And cables, overhead conductors, splices, and terminations will experience less thermal and mechanical stress from through-fault currents too.

IntelliRupter features a base-integrated control that’s accessed for configuration and operation via a secure WiFi link
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IntelliRupter features a base-integrated control that’s accessed for configuration and operation via a secure WiFi link. This innovative approach improves reliability, operator safety, and convenience, and significantly enhances security compared to “lock-and-key” approaches. IntelliRupter also features:

  • A unique magnetic actuating system that enables PulseClosing technology.
  • Integrated three-phase voltage sensing – on both sides of the interrupters.
  • An integrated power module – available on one or both sides of the interrupters.
  • Eliminates need to install separate power transformers
  • Integrated three-phase current sensing. Provides linear output over the range from load to fault current.
  • Solid dielectric insulation.
  • Vacuum interruption up to 12 500 A.
  • 630/800 A continuous current rating.
  • Voltage ratings from 10 through 27 kV at 50 or 60 Hz.
  • Models with integrated visible disconnect.

IntelliRupter and PulseClosing technology can be applied in enhanced non-communicating loop restoration systems that test the line for faults without exposing a good alternate circuit to disruptive fault current.

Pinpointing intruders

Southwest Microwave has announced the new Intrepid MicroTrack buried cable sensor, a groundbreaking innovation designed to detect intruders and pinpoint their location to within 3 m.

“With its covert, terrain-following properties, precise detection capabilities and site-adaptive characteristics, MicroTrack is a significant and uniquely different perimeter security solution,” said Bob Kirkaldie, director of marketing and sales for Southwest Microwave. “Our teams have logged thousands of hours conducting research at field sites throughout the world, including at our own test facilities in Arizona, Canada and the UK.”

MicroTrack is the newest addition to the Intrepid family of truly intelligent, site-adaptive perimeter intrusion systems which can pinpoint intrusions and adapt to a real-world site environment.

The MicroTrack system includes a processor unit and two pairs of buried cables. Each cable pair – one transmitter and one receiver – is buried 15-20 cm underground, creating an electromagnetic detection field that allows operators to detect disturbances and precisely locate intruders. A single MicroTrack system is capable of securing up to 400 m. Multiple systems can be networked together to secure sites of any size.