FKV-53NHF is a multifunctional three-phase protection relay designed for 3P4W systems. It integrates phase failure, over/under voltage, phase imbalance, neutral loss and phase sequence protection in one compact unit. The built-in phase sequence detection prevents reverse phase damage, while neutral loss protection ensures stable voltage distribution. With adjustable parameters, the relay significantly improves system safety and operational reliability.
·3P&4W System (3*220VAC+Neutral)
· Over Voltage : 130V – 160V AC+Off (Adjustable)
· Under Voltage : 70V – 100V AC+Off (Adjustable)
· Asymmetry : %5 – %50 (Adjustable)
· Error Waiting Time : 1sec. – 30sec. (Adjustable)
· Reset Time : 1sec. – 30sec. (Adjustable)
· Neutral-Off Protection
· Phase Sequence Protection
