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JR20 Thermal Overload Relay
  • JR20 Thermal Overload RelayJR20 Thermal Overload Relay
  • JR20 Thermal Overload RelayJR20 Thermal Overload Relay

JR20 Thermal Overload Relay

China XUCKY Electric customized JR20 Thermal Overload Relays are suitable for circuits with AC 50Hz, voltages up to 660V, and currents up to 630A, to protect against overload, phase failure and three phase unbalance of AC motor.

JR20 Thermal Overload Relays are suitable for circuits with AC 50Hz, voltages up to 660V, and currents up to 630A, to protect against overload, phase failure and three phase unbalance of AC motor. With phase-failure protection, temperature compensation, manual or auto reset, action tripping flexibility check, action tripping indication, disconnection check button and other functions. Products meet the GB14048.4.


Model and Meaning


Normal working conditions and installation conditions

Ambient temperature: The average value does not exceed +35°C in 24 hours.

Altitude: no more than 2000m.

Atmospheric conditions: The relative humidity does not exceed 50% at +40°C, and higher relative humidity may be allowed at lower temperatures. For example, 90% at 20°C, special measures should be taken for the occasional condensation due to temperature changes.

Pollution level: 3 levels.

Installation category: Class III.

Installation conditions: The inclination of the installation face and the vertical is not more than ±5°.

In addition to mounting screws, the relay can also use 35mm standard rail.

Shock vibration: The relay should be installed and used in places where there is no significant shaking, shock and vibration.

Transportation, Storage: The relay should not be subject to severe impact and vibration during transportation, and it must not be affected by rain or snow in transportation and storage. Relays are suitable for transport and storage at -25°C ~ +55°C, and at +70°C for short periods (in 24h).


Structural Feature

Internal structure: Insert combination or independent structure; three-dimensional structure, pull spring blade jump action mechanism; with phase failure and temperature compensation structure.

Installation operation: with action tripping flexibility inspection, action tripping indication and disconnection inspection and other functions; optional manual reset and automatic reset; normally closed and normally open auxiliary contacts insulated and separated

Model

Rated insulation voltage Ui (V)

Thermoelement

Rated current range (A)

Corresponding AC contactor

JR20-10

660

1R

0.1~0.13~0.15

CJ20-10

2R

0.15~0.19~0.23

3R

0.23~0.29~0.35

4R

0.35~0.44~0.53

5R

0.53~0.67~0.8

6R

0.8~1~1.2

7R

1.2~1.5~1.8

8R

1.8~2.2~2.6

9R

2.6~3.2~3.8

10R

3.2~4~4.8

11R

4~5~6

12R

5~6~7

13R

6~7.2~8.4

14R

7~8.6~10

15R

8.6~10~11.6

JR20-16

1S

3.6~4.5~5.4

CJ20-16

2S

5.4~6.7~8

3S

8~10~12

4S

10~12~14

5S

12~14~16

6S

14~16~18

JR20-25

1T

7.8~9.7~11.6

CJ20-25

2T

11.6~14.3~17

3T

17~21~25

4T

21~25~29

JR20-63

1U

16~20~24

CJ20-40
CJ20-63

2U

24~30~36

3U

32~40~47

4U

40~47~55

5U

47~55~62

6U

55~63~71

JR20-160

1W

33~40~47

CJ20-100
CJ20-160

2W

47~55~63

3W

63~74~84

4W

74~86~98

5W

85~100~115

6W

100~115~130

7W

115~132~150

8W

130~150~170

9W

144~160~176

JR20-250

1X

130~150~170

CJ20-250

2X

167~200~250

JR20-400

1Y

200~250~300

CJ20-400

2Y

267~335~400

JR20-630

1Z

320~400~480

CJ20-630

2Z

420~525~630

Note: The 10R and below specification in JR20-10 does not include a phase failure protection device.


Basic parameters of auxiliary circuit

Utilization Category

Rated frequency

Rated insulation voltage (Ui)

Rated operational voltage (Ue)

Rated operational current (Ie)

Conventional thermal current

Auxiliary contact

AC-15

50Hz

380V

127V

2.83A

6A

NC 95-96

220V

1.64A


380V

0.95A


220V

0.82A

6A

NO 97-98

380V

0.47A



Operation characteristics

No.

Setting current multiples

Action time

Initial condition

Operation characteristics when negative each phase is balanced

1

1.05

No action in 2h

Cold

2

1.2

Action in 2h

Thermal (after No. 1 test)

3

1.5

<2min

<4min

Thermal (after No. 1 test)

4

7.2

2s<Tp≤10s

4s<Tp≤10s

Cold

5

1.0

No action in 2h

Cold

6

1.2

Action in 2h

Thermal (after No. 5 test)

7

1.05

No action in 2h

Cold

8

1.3

Action in 2h

Thermal (after No. 7 test)

Operation characteristics when negative each phase is unbalanced


Any two phase

Third phase


1

1.10

0.9

No action in 2h

Cold

2

1.15

0

Action in 2h

Thermal (after No. 1 test)


Outline and lnstallation Dimension

1. Outline and lnstallation Dimension of JR20-10Z/JR20-16Z/JR20-25Z/JR20-63Z/JR20-160Z


2. Outline and lnstallation Dimension of JR20-10L/JR20-16L/JR20-25L/JR20-63L/JR20-160L


3. Outline and installation dimension of JR20-10GL/JR20-16GL/JR20-25GL/JR20-63GL/JR20-160GL


Thermal Relay

A

B

C

D

E

F

G

H

K

a

M1

M2

φ

Model

Feature

JR20-10

Z

44

77.5

101

57.8


10

4.5

13.9


32




L

44

70

101

46


14

4.5

8.9


32

M5



G

44

70

112

53


14


8.9



M5



JR20-16

Z

44

78

101

71


14

4.5

12.9


32




L

44

70

101

46


14

4.5

8.9


32

M5



G

44

70

112

53


14


8.9

5.2


M5



JR20-25

Z

47.5

82.5

117

66


20.5

4.5



32




L

44

70

117

46


14


8.9

5.5

32

M5



G

44

70

117

53


14

5.5

8.9

6.5


M5



JR20-63

Z

64

90

117

82


20

5.5



46




70

90

117

92


28

5.5



46




L

65

80

117

62


23

5.5



46

M6



65

80

117

62


23




46

M6



G


























7

JR20-160

Z

104

100

152

87.5

87.5

29




37

M6

M8

7

104

100

152

87.5

87.5

45




37

M6

M8


L






























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