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KE-FKR4 (D)
Intelligent Voltage Phase Sequence Protector

Product Overview

This is phase sequence protector in three phase systems, it measures RMS values of AC voltages and system frequency sensitively. Using up direction button
(Select) phase-neutral voltages and phase-phase voltages monitor sequentially KE-FKR4(D) has many features：Phase Failure、Phase Sequence、Over Voltage
Protection、Under Voltage Protection、Voltage Unbalance (asymmetry). Protection：Over Frequency Protection、Under Frequency Protection. When device is turn
on if its adjusted voltages and frequency in its interval and if phase sequence is correct relay switch on. If any of error occurred ( except phase failure and phase
sequence ) at the end of adjusted time relay switch off its contact. When system return normal values, at the end of time out relay switch on.
IMPORTANT
L1-N is device supply inputs. Thus,the applied L1-N voltage must be rated voltage of system .
The measured frequency also must the frequency of the system.

Technical Parameter

◆ Rated Voltage (Un) ： 220Vac (L1-N) ◆ Display ： 3 Digit LED
◆ Operating Range ： (0,8-1,1) x Un ◆ Contact Current ： Max. 5A / 240Vac
◆ Frequency ： 50 / 60 Hz ◆ Device Protection Class ： IP 20
◆ Supply Power Consumption ： < 4VA ◆ Connector Protection Class ： IP 00
◆ Voltage Measurement (Phase-Phase) ： 10-500 VAC (For L1-N 176V-242V) ◆ Temperature ： - 5℃ ~+ 50℃
◆ Voltage Measurement Power Consumption ： <1VA (for one phase) ◆ Connection Type ： To connection rail in electrical panel
◆ Measurement Sensitivity ： %1±1 digit

Product Function

Phase Failure： (u-U)
Locking Function：(Latch)
L-t：Locking Time ( 001-060 min. )
L-C ： Locking Counter ( oto , 001-010 piece )
Over and/or Under Frequency Protection ： ( 40-70 Hz )

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