- 75 -
%(I
2
/I
1
)> Broken Conductor Protection Menu
Broken Conductor Protection is symbolized as
%(I
2
/I
1
)> or I
2
/I
1
> in the IEC Standards, where I
1
describes the positive sequence current and I
2
describes the negative sequence current.
%(I
2
/I
1
)> protection is utilized to intervene the primary
circuit in cases where one or two primary phase
conductors are broken (I = 0 A) but there is no fault
current, or one or two secondary wirings are open
circuit.
The picture shows the Broken Conductor Protection
Menu and the menu comprises 3 parameters.
Protection
Can be set as “Active” or “Passive”, to have the protection into or out of service.
%(I
2
/I
1
)> (Threshold)
Indicates the threshold value for the protection function. The set value range is %(20-100).
t%(I
2
/I
1
)> (Tripping Delay)
Describes the trip delay time once the %(I
2
/I
1
) threshold is broken. Delay type for broken conductor
protection is DMT and can set within the range of (1 – 14,400) s. □
To Next Page
Loading...
Need help?
General
