60
Thermal Overload Relay
J7TKN
Tripping Characteristics for J7TKN-E
Detailed tripping times for each range see table page 58
Tripping Characteristics for J7TKN-F
Detailed tripping times for each range see table page 58
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
= I
max
/I
e
I
max
= 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
= I
max
/I
e
I
max
= max. phase current
I
e
= max. scale value