Yueqing Weihe Electric Co., Ltd.
Main products:air pressure switch,smart protector applicable,double-stage double -speed starter,ac contactor,magnetic starter
Contact Us
  • Contact Person : Mr. Cheng Weichun
  • Company Name : Yueqing Weihe Electric Co., Ltd.
  • Tel : 86-0577-27873126
  • Fax : 86-0577-27873127
  • Address : Zhejiang,Yueqing,Lv'ao Industrial Zone, Liushi
  • Country/Region : China
  • Zip : 325604

WEIHE Intelligent Oil Level Switch

WEIHE Intelligent Oil Level Switch
Product Detailed
WEIHE Intelligent Oil Level Switch protect motor if without oil good performance competitive price easy installation

Intelligent Oil Level Switch

Instruction Manual



A. Instruction

Apply to 200V/380V air compressor which is with magnetic starter or motor protector;Without changing inner structure, controller can protect air compressor when it’s without oil.

B. Component

Plastic housing, oil cavity, indicator light, relay, floating ball, circuit board

C.  Working Principle

Air compressor works when oil is full filled and floating ball in oil cavity goes up. At this moment, green light is normally off.Floating ball goes down when oil is reducing. If there is only 1/3 oil left, floating ball will stop air compressor. At this moment, green light is normally on, and red light begins flickering. Operator should switch off the electricity and fill in oil.

D. Installation

Set perpendicularly in the port of crankcase and gradient should be less than 5°.The two red wires are power wires which are wired to two inlet wires of motor protector discretionary.The two blue wires are controlling wires. One of the wires is connected to coil (A1) of ac contactor. Aother is connected to the switch of pressure switch.Wiring schematic

E. Maintaining

In order to protect the sensitivity of floating ball, controller must be check and clean residuums in the oil cavity after working 1000 hours.Change oil after cleaning oil cavity.

F. Notice

Must stop power when filling in oil.Careful installation and taking off.

Company Workshop

WEIHE Intelligent Oil Level Switch

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