JR20 Thermal Overload Relay
JR20 Thermal Overload Relay 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 Relay 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 Relay Details
Application
JR20-10L series thermal overload relay are suitable for overload and phase-failure protection of AC motors with frequency of 50/60Hz, voltage up to 660V, current up to 0.16-630A under 8-hours duty or uninterrupted duty.
Functions provided by these relays are: Phase-failure protection, temperature compensation, ON/OFF indication, and manual/automatic reset.
Applicable Standards: National Standard: GB 14048, International Standards: IEC 60947-4-1
LR20- L, L shows installed as single units
The relays can be mounted onto contactors or installed as single units.
Operating Conditions
The altitude couldn t exceed 2000m.
Ambient temperature: -5 ~+55 degree centigrade and the average temperature no more than +35 degree centigrade in 24 hours.
Atmosphere: Comparative humidity no more than 50% at max +40 degree centigrade, and it may be higher at a lower temperature. The lowest average temperature no more than +20 degree centigrade in the wettest month.
The maximum average comparative humidity of this month could not exceed 90%, The change of temperature leading to dew on the product must be considered.
Class of pollution: Class 3.
The slope between installation surface and vertical surface could not exceed plus and minus 5 degree
Keeping away from explosive, corrosive and electric atomy.
Keeping dry.
The product should be used and installed at certain place without any shock, vibration etc.
Technical Data
|
Item |
|
JR20-25L |
JR20-63L |
JR20-160L |
JR20-630L |
|
|
Rated operational current |
|
25 |
63 |
160 |
630 |
|
|
Rated operational voltage |
|
660 |
660 |
660 |
660 |
|
|
Phase-failure protection |
|
Yes |
Yes |
Yes |
Yes |
|
|
Manual/Auto reset |
|
Yes |
Yes |
Yes |
Yes |
|
|
Temperature compensation |
|
Yes |
Yes |
Yes |
Yes |
|
|
Releasing indicator |
|
Yes |
Yes |
Yes |
Yes |
|
|
Test button |
|
Yes |
Yes |
Yes |
Yes |
|
|
Stop button |
|
Yes |
Yes |
Yes |
Yes |
|
|
Auxiliary |
|
1NO+1NC |
1NO+1NC |
1NO+1NC |
1NO+1NC |
|
|
NC 95-96 |
127V rated current A |
4.3 |
4.3 |
4.3 |
4.3 |
|
|
|
220V rated current A |
2.5 |
2.5 |
2.5 |
2.5 |
|
|
|
380V rated current A |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
NC 97-98 |
220V rated current A |
1.6 |
1.6 |
1.6 |
1.6 |
|
|
|
380V rated current A |
1.0 |
1.0 |
1.0 |
1.0 |
|
|
Mounting |
|
as single unit |
as single unit |
as single unit |
as single unit |
|
|
Conductor |
Main circuit |
Solid or stranded conductor |
1.5~6.0 |
4.0~25 |
10~95 |
480A 2 x 150 |
|
Auxiliary |
> 480A 2 x 185 |
|||||
|
Terminal screw |
M5 |
M6 |
M8 |
M10 |
||
|
Solid or stranded conductor |
1.0 |
1.0 |
1.0 |
1.0 |
||
|
Terminal screw |
M3.5 |
M3.5 |
M3.5 |
M3.5 |
||
Protection Characteristics
|
Item |
NO |
Times the setting current |
|
Release time |
Test condition |
|
Overload |
1 |
1.05 |
|
> 2h |
Start from Cold status |
|
2 |
1.2 |
|
< 2h |
Start from Hot status right after item no. 1 |
|
|
3 |
1.5 |
|
< 2m |
Start from Hot status right after item no. 1 |
|
|
4 |
7.2 |
|
2s< Tp< 10s |
Start from Cold status |
|
|
Phase - failure |
|
Any two phases |
Another phase |
|
|
|
5 |
1.0 |
0.9 |
> 2h |
Start from Cold status |
|
|
6 |
1.15 |
0 |
< 2h |
Start from Hot status right after item no. 1 |
|
|
7 |
3pole 1.0 |
|
> 2h |
Start from Cold status |
|
|
8 |
2pole 1.32 |
1pole 0 |
< 2h |
Start from Hot status right after item no. 1 |
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