A TELMA Electro-magnetic Retarder is an assembly of electro magnetic coils which, when activated by an electrical current, creates eddy ( Foucault ) currents between two rotors and a stator and retards the movement of the rotor.
What is Telma in truck?
Telma induction brakes, commonly known as electrical or electromagnetic retarders, offer an endurance braking system. They dissipate a large part of the braking energy, thus relieving conventional braking systems. Telma induction braking systems dissipate the braking energy by generating eddy currents.
Where is Telma made?
Telma SA, with its headquarters at Cergy-Pontoise near Paris, France, is more than 60 years old and has been part of the Valeo Group since 2001.
How do you use Telma retarder?
The retarder can be activated by switches fitted to the accelerator and the clutch and by a hand-operated lever mounted to the steering column or the dashboard. Telma retarders are frictionless and virtually maintenance free.
How does a Telma work? – Related Questions
Why is Telma used?
Telma 40 Tablet is a medicine used to treat high blood pressure and heart failure. Lowering blood pressure helps to prevent future heart attacks and strokes. This medicine is also effective in preserving kidney function in patients with diabetes.
Is Telma a beta blocker?
Metoprolol belongs to the class of drugs known as Beta-blockers. It helps to reduce blood pressure by allowing the blood to flow more smoothly. Together, Telma-Beta 25 Tablet 10’s helps in lowering blood pressure to normal.
When should you use the retarder?
Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from “running away” by accelerating down the hill. They are not usually capable of bringing vehicles to a standstill, as their effectiveness diminishes as vehicle speed lowers.
How do I activate retarder?
When you push the increase key, the retarder will turn on and slow you down, unless you are pushing the accelerator. This will also disable CC. Each time you increase, you will slow down faster.
What is the retarder used for?
Retarders are used to further improve the braking performance on commercial vehicles. Like engine brakes, they are wear-free continuous brakes. Retarders relieve the service brake and increase the active safety and cost-effectiveness of commercial vehicles. Retarders are installed in a commercial vehicle’s drive train.
How does the retarder work?
The retarder works by absorbing energy during the compression stroke, and throwing away this energy through the exhaust valves as the piston completes its compression stroke. The most popular engine compression retarder is the Jake Brake.
What are the 4 types of retarders?
There are four basic types of retarders (exhaust, engine, hydraulic, and electric). Ali retarders can be turned on or off by the driver. On some vehicles the retarding power can be adjusted.
What are the two types of retarders?
There are two kinds of retarders, defined as Type B (Retarding Admixtures) and Type D (Water Reducing and Retarding Admixtures). The main difference between these two is the water-reducing characteristic in Type D that gives higher compressive strengths by lowering w/cm ratio.
Does retarder weaken concrete?
Retarding admixtures have little or no effect other than to delay the setting of the cement. They do not plasticise significantly and have no effect on the water demand or other properties of the concrete.
How long can you leave retarder on concrete?
How do you know when it’s time to wash off the surface? The time of surface retarder removal will vary with each job, depending on the concrete mix design and environmental conditions. Generally, the window is anywhere from 12 to 24 hours after application.
What is the most common retarder?
Set-Retarding Admixtures
The most commonly used retarders are Calcium Sulfate (Gypsum), Common Sugar, Lignosulfonic acids.
What is the best slump for concrete?
A good slump for most flatwork placed by hand: five inches. For slabs struck off with mechanical equipment: two to four inches.
What are the 4 types of slump?
There are three types of slump that may occur in a slumps test, namely, true slump, shear slump and collapse slump.
What happens if the slump is too high?
High slump value means the water-cement ratio of concrete is high. Hence, both the strength and durability of concrete may get reduced.