Datasheet

Thermal Overload Relay J7TKN 7
Tripping Characteristics for J7TKN-A*, J7TKN-B, J7TKN-C, J7TKN-D
Detailed tripping times for each range see table page 5
Tripping Characteristics for J7TKN-E
Detailed tripping times for each range see table page 5
with three-phase load with two-pole load
Tripping time
min. s
F.L.C. multiplication factor
Average value of
typical tolerance
curves from cold
condition
Proceeding from
service conditions
the times decrease
to 20-30% of the
characteristic values
Tripping time
min. s
K
Typical tolerance
curve from cold
condition
Proceeding from
service conditions
the times decrease
to 70-80% of the
characteristic values
K= Imax/Ie
Imax = max. phase current
I
e = max. scale value
with three-phase load with two-pole load
Tripping time
min. s
F.L.C. multiplication factor
Average value of
typical tolerance
curves from cold
condition
Proceeding from
service conditions
the times decrease
to 20-30% of the
characteristic values
Tripping time
min. s
K
Typical tolerance
curve from cold
condition
Proceeding from
service conditions
the times decrease
to 70-80% of the
characteristic values
K= Imax/Ie
Imax = max. phase current
I
e = max. scale value