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.

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Product Description

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
JR20-250		2X	167~200~250	CJ20-250
JR20-400		1Y	200~250~300	CJ20-400
JR20-400		2Y	267~335~400	CJ20-400
JR20-630		1Z	320~400~480	CJ20-630
JR20-630		2Z	420~525~630	CJ20-630

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	6A

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	A	B	C	D	E	F	G	H	K	a	M1	M2	φ
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
	Z	70	90	117	92		28	5.5			46
	L	65	80	117	62		23	5.5			46	M6
	L	65	80	117	62		23				46	M6
	G
	G													7
JR20-160	Z	104	100	152	87.5	87.5	29				37	M6	M8	7
	Z	104	100	152	87.5	87.5	45				37	M6	M8
	L
	L