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RKF phase control relay is a mechanical switching device designed to monitor voltage levels in three-phase AC networks and provide protective disconnection of the load in case of voltage drop or rise beyond the permissible limit, as well as in case of phase failure, incorrect phase sequence, and asymmetry. These relays are characterized by compact dimensions and versatility of application in three-wire and four-wire circuits. The relay monitors the following parameters: phase absence, phase sequence.
1-phase
No
3-phase
Yes
1-phase hysteresis monitoring possible
No
1-phase undervoltage monitoring possible
No
3-phase hysteresis monitoring possible
Yes
3-phase undervoltage monitoring possible
Yes
Height
75 мм
Height
75 мм
Depth
65 мм
Voltage measurement range 1 at
380 В
Voltage measurement range 1 from
300...380 В
Voltage measuring range 2 to
500 В
Voltage measuring range 2 from
420...500 В
Voltage measuring range to
540 В
Voltage measuring range from
154...540 В
Number of normally closed (NC) contacts
0
Number of normally open (NO) contacts
0
Number of switching contacts
2
Maximum permissible delay time
2 с
Maximum permissible trip delay time without holding
5 с
Minimum adjustable delay time
0.5 с
Minimum adjustable response delay time without time lag
0.5 с
Rated control supply voltage Us AC at 50 Hz up to
540 В
Rated control supply voltage Us AC at 50 Hz from
266...540 В
Rated control circuit AC supply voltage Us at 60 Hz from
266...540 В
Rated control supply voltage Us DC up to
0 В
Rated control supply voltage Us DC from
0 В
Tripping threshold voltage to
500 В
Response threshold voltage from
300...500 В
Switch-on current type
AC (alternating)
Monitored voltage current type
AC (alternating)
With removable terminals, clamps
No
Includes DC voltage monitoring functions - hysteresis
No
Includes DC voltage monitoring functions - overvoltage
No
Includes DC voltage monitoring functions - undervoltage
No
Connection type
Screw connection
Phase sequence monitoring function
Yes
Phase asymmetry detection function
No
Phase failure detection function
Yes
Overvoltage detection function
No
Undervoltage detection function
No
Width
18 мм
0
★★★★★
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