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OTT Cable Way Systems

Stationary systems for vertical based discharge measurements

OTT cable way systems provide safety where mobile discharge measurements in water or from a bridge cannot be performed. They are driven mechanically or electrically and are available for span lengths of up to 160 m. The systems are DEKRA type approved and meet all applicable safety requirements. The components do not require any maintenance; lubrication or oil changes are not necessary.

  • Fixed installation
  • Maintenance-free cable way system for span lengths of up to 160 m. All components are maintenance free. Oil-free gas pressure spring tensioner for span lengths of above 20 m. Electrical or optionally mechanical double-drum winch.
  • Vertical method based discharge measurements
  • Rivers and canals
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Cable way system

  • Galvanised, compacted, steel-reinforced track cable; pre-stretched, resulting in minimum residual elongation; round smooth surface for silent and low-wear idler pulley operation
  • Corrosion-protected, extremely strong towing cable made of galvanised wires – designed for at least 10 years of operation
  • Single-arm trolley with only one idler pulley – consistent long-term operating performance
  • Gas pressure spring tensioner (for span lengths > 20 m) – compensates for temperature effects and eliminates manually re-tensioning or releasing the cable tension; free of oil and environmentally compatible – no oil will get into the water
  • Corrosion-resistant, slim, and sturdy pulley block made of cast aluminium – no risk of cracking because of welded seams.

Double-drum Winch

  • Designed according to the LAWA* recommendations for the safety of cable way systems and type-tested
    *German working group on water issues
  • Mechanical or electrical drive – mechanically operated winches may be retrofitted to the electrical drive
  • Ergonomically designed and easily operated safety crank including load-actuated brake – the load is safely held when a mechanical drive is used
  • Lifetime lubricated gearbox – eliminates lubricating and/or changing the oil
  • Smoothly operating brake/clutch combination – facilitates low-noise changes between lowering/raising operations and horizontal travel
  • Electronic meter for depth and distance – allows the instrument to be exactly placed at the desired measuring location
  • Increased safety provided by overload clutch – the current meter cable is unwound in case of excessive load, e.g. when the instrument got caught.

Electrical Double-drum Winch

  • Maintenance-free direct drive of the towing cable
  • Three-phase motor with state-of-the-art inverter technology – energy efficient, optimum start-up and speed performance
  • May be switched to safety crank operation – therefore operational even without power
  • Uninterruptible power supply (optional) – active measurements may be completed in case of power failure
  • Automatic stop when an end position is reached or the ground is hit – simplifies instrument control.

Controller for Electrical Double-drum Winches

  • Large display, portable wired unit that is used to intuitively control the electrical double-drum winch by means of a joystick
  • Includes a potentiometer for infinitely setting the velocity
  • Fully automated low-noise shifting operation of the clutch
  • Emergency Stop switch to ensure safe working in critical conditions
  • Internal measuring features for time/pulse and integrated measurements
  • Easy parameterisation of external signal counter sets via menu feature (e.g. OTT Z400)
  • Optical and audio alerts in case of ground contact; Diagnostic features and alarm information.

All designs of the OTT cable way system are available for mechanical or electrical drive. Moreover, you may choose whether the winch is to be operated from the right-hand or left-hand side.

Five models of cable way systems by OTT
Cable way system - mounting cable tensioner

Typically, OTT cable way systems are installed by the OTT HydroService department. Our specialists are well-trained for this job and use the appropriate equipment. Thus they are able to ensure careful and safe installation.

All components of the OTT cable way systems are maintenance-free.
However, regular inspections by authorised experts are mandatory in many countries in case of cable way systems for hydrological service. OTT HydroService performs these inspections in a reliable manner and does any service, replacement, or adjustment operations efficiently and professionally.

Leaflet - OTT Cable Way Systems
Operating instructions OTT cable way for hydrological surveys
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Application Cable way systems for for vertical method based discharge measurements in rivers and canals
Cable way system
Span length including turnbuckle tensioner up to 20 m
Span length including gas pressure spring tensioner up to 160 m
Cable diameter
Track Cable 16 mm
Towing Cable 6 mm
Current Meter Cable 3.5 mm
Double-drum Winch
Installation Right-hand side or left-hand side
Cable exit Horizontal or vertical
Current meter cable drum
Rated tension force 1250 N
Maximum tension force 3000 N ±20 %
Tripping force of safety friction clutch 3000 N ±20 %
Maximum useable cable length 164 m
Maximum number of cable layers 6
Minimum number of windings remaining 3 (≙ 3.1 m)
Torque required on crank 11 N/m (for 100 kg of weight)
Crank length 0.3 m
Mechanical Double-drum Winch
Distance/depth meter
Design 5-digit LCD; incl. Reset keys
Resolution: 1 cm
Back-up battery 9 V Battery (alkaline type)
Mechanical data
Dimensions (W x H x D)
incl. hand crank approx. 570 x 770 x 670 mm
without hand crank approx. 450 x 750 x 560 mm
Weight approx. 100 kg (without current meter cable and hand crank)
Environmental conditions
Operating temperature -20 °C ... +60 °C
Storage temperature -40 °C ... +85 °C
Air humidity 0 % ... 95 % RH (non-condensing)
Electrical Double-drum Winch
Electrical drive
Supply voltage 230 V / 50 Hz
Control voltage 24 V DC
Motor power 1.5 kW
Degree of protection IP54
Sound pressure level 70 dB (A)
Mechanical data
Dimensions (W x H x D)
Electrical double-drum winch approx. 570 x 900 x 670 mm (without hand-crank for emergency operation)
Control cabinet 600 x 600 x 250 mm
Winch (incl. Motor) approx. 135 kg (without current meter cable and hand crank)
Motor 35 kg
Control cabinet approx. 30 kg
Operating unit (including chest strap)
Dimensions (W x H x D) 280 x 200 x 130 mm (without joystick and chest strap)
Display 5 rows, monochrome, incl. function key assignments
Operating controls Joystick, Emergency Stop pushbutton, 10 function keys
(may also be used as numerical keys), cursor keys, permanent function keys, additional potential meter for speed setting
Acoustic alert internal buzzer sounds in case of ground contact
Environmental conditions
Operating temperature
Standard 0 °C ... +50 °C
With opt. Heater -20 °C ... +50 °C
Storage temperature -20 °C ... +60 °C
Air humidity 0 % ... 95 % RH (non-condensing)

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