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Industrial Automation

Industrial Automation

J7TKN

Thermal Overload Relay

J7TKN

Thermal Overload Relay

Thermal Overload Relays, tripping times for selection to motors of protection degree EEx e

Relays With Standard Tripping Characteristic

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.

J7TKN Specifications 4

Labels of tripping curves for each setting range, sized 148 x 105mm (self-adhesive) are available on request.

Specify type and setting range.

Fuses for J7TKN-A; J7TKN-B; J7TKN-C; J7TKN-D; J7TKN-E; J7TKN-F Type Setting Range Max. Fuse Size According

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 -

*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.
*2. Miniature fuse

Thermal Overload Relays

Data according to IEC 947-4-1, IEC 947-5-1, VDE 0660, EN 60947-4-1, EN 60947-5-1

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 -

*1. Suitable for: earthed-neutral systems, overvoltage category I to III, pollution degree 3 (standard-industry: Uimp =
        4 kV (at 440 V), 6 kV (at 690 V).
        Data for other conditions on request.
*2. Maximum cable cross-section with prepared conductor
*3. Without terminals, suitable for bushing one connector 70 mm2 (stranded) per phase
*4. Busbar sets see accessories Catalog.
*5. Switching capacity of the start contact: AC 15 300 VA, max. 1.5 A, DC 13 (max. 220 V) 30 W, max. 1.5 A

Data according to cULus

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

Temperature Compensation

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