Digital phase and neutral failure, asymmetry detection and under / over voltage protection relay with NO+NC output, DIN rail mount, TENSE (Made in Turkey)

The FKV-03HF is an asymmetry-adjustable phase failure and sequence monitoring relay with under/over voltage protection manufactured by Tense Electronics. It is designed to protect three-phase motors and loads from electrical damage caused by AC voltage irregularities.

• Phase Sequence / Reverse detection;
• Phase loss detection; 
• Neutral loss detection; 
• Adjustable phase asymmetry trip level: 5% – 50%
• High Voltage Protection: 400V – 480V AC (Adjustable)
• Low Voltage : 260V – 360V AC (Adjustable)
• Error Waiting Time : 1 sec. – 30 sec. (adjustable)
• Reset Time after fault removal: 1sec. – 30 sec. (adjustable)
• 3xLED displays 

Applications

It is primarily used to safeguard: 

• Electric Motors: Prevents overheating and burnout from phase imbalances or loss.
• Compressors: Protects against reverse rotation caused by incorrect phase sequence.
• Industrial Machinery: Acts as a general-purpose protection relay for three-phase systems

Technical Specifications

• Monitoring volatage: 3x380V AC 50/60Hz
• Power supply: 220V AC 50/60 Hz
• Asymmetry adjusting: 5% - 50%
• Output: NO+NC, 5A / 250VAC Resistive Load
• Power consumption: <6VA;
• Operating temperature: -20C...+55C ;
• Mounting: 35mm DIN rail.