Interactive Guide: Troubleshooting the DELTA-P II Oil Pressure Relay
One of the most critical safety mechanisms for a 3-phase commercial compressor is the oil pressure differential switch. If a compressor runs without proper lubrication, it will destroy itself in minutes.
The Kriwan DELTA-P II is a standard safety module used across the industry to prevent this. However, its internal logic—specifically how it routes control voltage during a fault—can be confusing to wire and troubleshoot in the field. To make this clear, we built an interactive simulator
Interactive illustration : press button below, see how it works
Delta P
Placed directly on Oil pump port
