Relays
General
DFK-05F phase sequence and protection relays are designed to prevent the failures originated from motor heats and 3 phases loads..
Usage and Working Principle
Please connect the device according to the schema as shown.
To adjust the Asymmetry set value: While looking at the display which
is located on the left side, please adjust the (Asm%) button as requested.
When the user moves the button the values are going to be seen on the screen.
To adjust the waiting time: Please move the (t) button while looking
at the display which located on the left side. The values which has adjusted
can be seen on the left side on the display. After 4sec.that you stop moving
the button voltage values can be seen on the displays.
When the device is loaded with energy the set values can be seen and
after 2 sec. Voltage values can be seen accordingly. When voltage values
between phases 180V and 460V, if the difference between voltages are
lower than adjusted relay LED turns on and contact output (NO)3.
ower than adjusted relay LED turns on and contact output (NO)3.
If any of the phase sequence voltage values descend under 180V or
increase up to 460V voltage error led turns on and after 2 sec. later relay
led turns off and contact out put assigns to (NC)1. When the voltages turns
into the normal values waiting time counts according to (t) and voltage failure led turns off and contact output becomes (NC)3.
IF the difference between voltages are over than the asymmetry set value, asymmetry failure led turns on (Asm Err), it counts
as the setted waiting time. Relay led turns off and contact out put becomes (NC) 1. If Difference between voltages descend
under setted value, asymmetry failure led turns off, it counts the waiting time, after the waiting time is up relay led turns on and
the contact out put becomes (NO) 3.
DFK-05F Device provides phase sequence speciality..When the p