ZTR - Intelligent Equipment Management Solutions

Bolt-on Adhesion

Dramatically improves wheel slip control and tractive effort. Download BOA Brochure.

About BOA & BOA-WS

Retrofit your older locomotives with a BOA Excitation/Wheel Slip Control System. With a locomotive wheel slip control system you will see significant locomotive adhesion improvements in operating performance and does not require any operator interface to prevent wheel over speed.



  •  Easy installation
  •  Integrated diagnostics
  •  Solid state replacement of load regulator
  •  No probes or axle generators
  •  More efficient train handling
  •  Increases dry rail adhesion
  •  Increases drawbar pull
  •  Smoother excitation control
  •  Main generator & traction motor
        overload protection

The BOA-WS is a compact controller designed to support a wide range of locomotives and offers a configurable set up depending on the application and locomotive.

For example, if you add BOA WS to an EMD Dash 2 WS10 your benefits will include:

  •  Tractive Effort Improvement Using Adaptive Targeting
  •  Intelligent Sanding Control
  •  Short-Term Operation Protection
  •  Web Browser Interface

BOA Test Results

Test results* prove the BOA system.

ZTR-BOA Comparison Charts

*Tests conducted using an EMD GP9 locomotive operating as a single unit. The BOA system was installed in the locomotive, in addition to the existing GP9 system, for test purposes only and each was subjected to identical tests.


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