Increase efficiency with automatic idling
In a situation where pump pressure is not needed due to low or no operations, it is important to reduce engine speed until pressure is needed again. Reducing the engine speed in idle situations increases the efficiency of the hydraulic system and thereby reducing fuel consumption and engine noise levels.
Although many auto idle applications are commonly using a mechanical switch, Danfoss recommends using an electronic switch.
Mechanical switches have many problems
- Mechanical switches often leak causing warranty claims
- The electrical contacts can burn out resulting in failure
- The general accuracy is around +/- 5%
- The set point can drift over time
- Over and burst pressure limitation due to moving parts
- Switch point range: 40 bar
- Pressure range: 0 – 60 bar
- Temperature range: -40 – 125 °C
- Accuracy: 2% FS
Features and benefits
Electronic pressure switches have 100% welded construction so no leakage possible
No electrical contacts to burn out
Highly accurate – better than 2% typical
No set point drift
Over and burst pressure advantage due to fully welded design
All the advantages from the “world” of transmitters in relation to vibration shock etc.
A more reliable auto idle system
Less wear outs of the switch due to no mechanical parts
Reduced warranty claims
MEP 2200 series, electronic pressure switches, dual output
MEP 2200 and 2250 are designed for use in severe OEM applications and has excellent long term stability with zero drift. MEP 2250 has a dual output with switch function and an analogue output signal: absolute voltage or 10-90% ratiometric voltage.