Thermal Overload Relay
J7TKN
59
Fuses for J7TKN-A; J7TKN-B; J7TKN-C; J7TKN-D; J7TKN-E; J7TKN-F
Tripping Characteristics for J7TKN-A, J7TKN-B, J7TKN-C, J7TKN-D
Detailed tripping times for each range see table page 58
Type
Setting Range
Max. Fuse Size According to Coordination-
type
Fuse UL
Fuse UL
(SCCR)
"2"
*1
*1) Coordination-type according to IEC 947-4-1:
„2“: Light contact welding accepted. Thermal overload relay must not be damaged.
„1“: Welding of contactor and damage of the thermal overload relay allowed.
"1"
*1
Short
Circuit
Current
Rating
DOL
Star Delta
quick
slow,
gL(gG)
slow,
gL(gG)
aM
A
A
A
A
A
A
A
kA
J7TKN-A
J7TKN-B
0.12
-
0.18
-
0.5
*2
*2) Miniature fuse
0.5
*2
25
-
15
5
0.18
-
0.27
-
1.0
*2
1.0
*2
25
-
15
5
0.27
-
0.4
-
2
2
25
-
15
5
0.4
-
0.6
-
2
2
25
-
15
5
0.6
-
0.9
-
4
4
25
-
15
5
0.8
-
1.2
-
4
4
25
2
15
5
1.2
-
1.8
-
6
6
25
2
15
5
1.8
-
2.7
-
10
10
25
4
15
5
2.7
-
4
-
16
10
25
4
15
5
4
-
6
7
-
10.5
20
16
25
6
15
5
6
-
9
10.5
-
15.5
35
25
35
10
25
5
8
-
11
14
-
19
35
25
35
16
30
5
10
-
14
18
-
24
50
35
63
16
40
5
13
-
18
23
-
31
50
35
63
20
50
5
17
-
24
30
-
41
63
50
63
25
60
5
23
-
32
40
-
55
80
63
80
35
70
5
J7TKN-C
28
-
42
48
-
73
100
80
150
50
110
5
J7TKN-D
40
-
52
70
-
90
160
100
150
63
200
5
52
-
65
90
-
112
160
125
150
80
250
10
60
-
74
104
-
128
160
125
150
80
250
10
J7TKN-E
60
-
90
104
-
156
For short circuit protecting overload relays
with current transformer use fuse accord-
ing to the contactor of the combination.
300
10
80
-
120
140
-
207
-
-
J7TKN-F
all ranges
-
-
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
