Thermal Overload Relay
last update: February 3, 2014
Setting Range
A |
Tripping time depending on the multiple of the current setting from cold condition
(tolerance ±20% of the tripping time) |
|||||
---|---|---|---|---|---|---|
IA/IN
3 |
IA/IN
4 |
IA/IN
5 |
IA/IN
6 |
IA/IN
7,2 |
IA/IN
8 |
|
J7TKN-A-... | s | s | s | s | s | s |
0,12 - 0,18 | 18,5 | 10,4 | 7,2 | 5,5 | 4,3 | 3,6 |
0,18 - 0,27 | 16,7 | 9,8 | 6,5 | 5 | 4,1 | 3,5 |
0,27 - 0,4 | 19,4 | 12,1 | 8,2 | 5,9 | 4,9 | 4,2 |
0,4 - 0,6 | 18,7 | 11,2 | 8 | 6 | 4,9 | 4,1 |
0,6 - 0,9 | 19,7 | 11,6 | 8,1 | 6,1 | 4,9 | 4,2 |
0,8 - 1,2 | 22,9 | 13,6 | 10 | 7,3 | 6 | 5,2 |
1,2 - 1,8 | 22,2 | 13,2 | 9,2 | 7,6 | 5,8 | 5,3 |
1,8 - 2,7 | 23 | 13,7 | 9,3 | 7,6 | 5,7 | 5,1 |
2,7 - 4 | 24 | 14,4 | 9,9 | 7,8 | 5,9 | 5,1 |
4 - 6 | 24,7 | 13,8 | 9,9 | 7,3 | 5,6 | 4,8 |
6 - 9 | 22 | 13,4 | 8 | 5,7 | 4,1 | 3,5 |
8 - 11 | 17,4 | 9,2 | 5,9 | 4,1 | 2,9 | 2,3 |
10 - 14 | 26,4 | 12,9 | 7,6 | 5,2 | 3,5 | 2,8 |
13 - 18 | 14,7 | 7,7 | 4,8 | 3,2 | 2,3 | 1,7 |
17 - 23 | 16,2 | 8,4 | 5 | 3,6 | 2,4 | 1,8 |
22 - 30 | 16,8 | 8,5 | 5 | 3,6 | 2,3 | 1,9 |
J7TKN-C-42 | s | s | s | s | s | s |
28 - 42 | 25,2 | 13,3 | 8 | 5,5 | 4 | 3,1 |
J7TKN-D-... | s | s | s | s | s | s |
40 - 52 | 18,3 | 9,2 | 5,6 | 3,9 | 2,8 | 2,2 |
52 - 65 | 17,8 | 8,7 | 5,2 | 3,4 | 2,5 | 1,9 |
60 - 74 | 19,5 | 13,5 | 11 | 10 | 9,5 | 8,5 |
J7TKN-E-... | s | s | s | s | s | s |
60 - 90 | 19,5 | 13,5 | 11 | 10 | 9,5 | 8,5 |
80 - 120 | 18 | 11 | 10 | 9 | 8,5 | 8 |
J7TKN-F-... | s | s | s | s | s | s |
100 - 150 | 34 | 26 | 24 | 20,5 | 19 | 18 |
140 - 210 | 30 | 24 | 21 | 18,5 | 17 | 16 |
When selecting a standard overload, refer to the tripping curve.
Determine the values of the starting current ratio IA/IN and the time tE which is marked on the label of the motor. The overload must trip within the tE time, which means that the tripping curve from cold condition must be (20% due to tolerance) below the coordination point IA/ IN and the time tE.
IA= Starting current of motor
IN = Rated current of motor
tE = tE-time of motor
All tripping times of overload relays J7TKN-A are shorter than the minimum values of the tE time for motors of protection degree EEx e acc. to EN 50019 and therefore are suitable for all motors of protection degree EEx e. For these overload relays the selection on basis of tripping curves is thereby not necessary.
Labels of tripping curves for each setting range, sized 148 x 105mm (self-adhesive) are available on request.
Specify type and setting range.
Type | Setting Range | Max. Fuse Size According to Coordination-type | Fuse UL
A |
||||
---|---|---|---|---|---|---|---|
DOL
A |
Star Delta
A |
"2" *1
quick A |
slow, gL(gG)
A |
"1" *1
slow, gL(gG) A |
aM
A |
||
J7TKN-A
J7TKN-B |
0.12 - 0.18 | - | 0.5 *2 | 0.5 *2 | 25 | - | 15 |
0.18 - 0.27 | - | 1.0 *2 | 1.0 *2 | 25 | - | 15 | |
0.27 - 0.4 | - | 2 | 2 | 25 | - | 15 | |
0.4 - 0.6 | - | 2 | 2 | 25 | - | 15 | |
0.6 - 0.9 | - | 4 | 4 | 25 | - | 15 | |
0.8 - 1.2 | - | 4 | 4 | 25 | 2 | 15 | |
1.2 - 1.8 | - | 6 | 6 | 25 | 2 | 15 | |
1.8 - 2.7 | - | 10 | 10 | 25 | 4 | 15 | |
2.7 - 4 | - | 16 | 10 | 25 | 4 | 15 | |
4 - 6 | 7 - 10.5 | 20 | 16 | 25 | 6 | 15 | |
6 - 9 | 10.5 - 15.5 | 35 | 25 | 35 | 10 | 25 | |
8 - 11 | 14 - 19 | 35 | 25 | 35 | 16 | 30 | |
10 - 14 | 18 - 24 | 50 | 35 | 63 | 16 | 40 | |
13 - 18 | 23 - 31 | 50 | 35 | 63 | 20 | 50 | |
17 - (23)24 | 30 - (40)41 | 63 | 50 | 63 | 25 | 60 | |
(22)23 - (30)32 | (38)40 - (52)55 | 80 | 63 | 80 | 35 | 70 | |
J7TKN-C | 28 - 42 | 48 - 73 | 100 | 80 | 150 | 50 | 110 |
J7TKN-D | 40 - 52 | 70 - 90 | 160 | 100 | 150 | 63 | 200 |
52 - 65 | 90 - 112 | 160 | 125 | 150 | 80 | 250 | |
60 - 74 | 104 - 128 | 160 | 125 | 150 | 80 | 250 | |
J7TKN-E
J7TKN-F |
60 - 90 | 104 - 156 | For short circuit protecting overload relays with current
transformer use fuse according to the 7contactor of the combination. |
300 | |||
80 - 120 | 140 - 207 | - | |||||
all ranges | - |
Type | J7TKN-A | J7TKN-B | J7TKN-C | J7TKN-D | J7TKN-E | J7TKN-F | |||
---|---|---|---|---|---|---|---|---|---|
Rated insulation voltage Ui *1 | V~ | 690 | 690 | 690 | 690 | 750 | 690 | ||
Permissible
ambient temperature |
operation | open | °C | -25 to +60 | |||||
storage | °C | -50 to +70 | |||||||
Trip class according to IEC 947-4-1 | 10 A | 10 A | 10 A | 10 A | 20 | 20 | |||
Cable cross-
section |
main
con- nector |
solid or
stranded |
mm2 | 0.75-6 +
0.75-2.5 *2 |
0.75-6 | 0,75-10 | 4-35 *2 | *3 | *4 |
flexible | mm2 | 0.75-4 +
0.5-2.5 *2 |
1-4 | 0,75-6 | 6-25 *2 | ||||
flexible
with multicore cable end |
mm2 | 0.5-2.5 +
0.5-1.5 |
0.75-4 | 0.75-6 | 4-25 | ||||
Cables
per clamp |
number | 1+1 | 2 | 2 | 1 | ||||
auxiliary
con- nector |
solid | mm2 | 0.75-2.5 *2 | ||||||
flexible | mm2 | 0.5-2.5 *2 | |||||||
flexible
with multicore cable end |
mm2 | 0.5-1.5 | |||||||
Cables
per clamp |
number | 2 | |||||||
Auxiliary
contacts Rated insulation voltage Ui *1 |
same potential | V~ | 690 | 690 | 690 | 690 | |||
different potential | V~ | 440 | 440 | 250 | 440 | ||||
Utilization
category AC15 |
Rated
opera- tional current Ie |
24V | A | 5 | 3 | 4 *5 | 5 | ||
230V | A | 3 | 2 | 2.5 | 3 | ||||
400V | A | 2 | 1 | 1.5 | 2 | ||||
690V | A | 0.6 | 0.5 | 0.6 | 0.6 | ||||
Utilization
category DC13 |
Rated
opera- tional current Ie |
24V | A | 1.2 | 1 | 1.2 | 1.2 | ||
110V | A | 0.15 | 0.15 | 0.15 | 0.15 | ||||
220V | A | 0.1 | 0.1 | 0.1 | 0.1 | ||||
Short circuit
protection (without welding 1kA) |
highest
fuse rating |
gL (gG) | A | 6 | 4 | 6 | 6 | ||
Setting range | A | to 23 | all | 28-42 | 52-65 | all | - | ||
Power loss
per current path (max.) |
minimum setting
value |
W | 1.1 | 1.1 | 1.3 | 2.9 | 1.1 | - | |
maximum setting
value |
W | 2.3 | 2.3 | 3.3 | 4.5 | 2.5 | - |
Type | J7TKN-A | J7TKN-B | J7TKN-C | J7TKN-D | J7TKN-E | ||
---|---|---|---|---|---|---|---|
Rated insulation voltage | V~ | 600 | 600 | 600 | 600 | 600 | |
Rated current | A | 23 | 32 | 42 | 74 | 85 | |
Auxiliary contacts | Rated voltage | ||||||
same potential | V AC | 600 | 600 | 600 | 600 | 600 | |
different potential | V~ | 150 | 150 | 150 | 150 | 150 | |
Switching capacity | AC | VA | 500 | 500 | 600 | 600 | 600 |
of aux. contacts | A | 4 | 2 | 4 | 4 | 4 |
In case of higher ambient temperature use the following formula:
(Ambient temperature - 20) x 0.125 = correction factor in % of the full load motor current
Example:
Ambient temperature 70°C, full load motor current 7 A
(70 - 20) x 0.125 = 6.25%
Setting value: 7 A + 6,25% = 7.44 A
last update: February 3, 2014