JR28 Thermal Relay
Contact:
JR28 series thermal relay are suitable for overload and phase-failure protection of AC motors with frequency of 50/60Hz, voltage up to 690V, current up to 0.1-150A under 8-hours duty or uninterrupted duty.
Functions provided by these relays, are phase -failure protection, ON/OFF indication, temperature compensation, and manual/automatic reset.
Applicable Standard: GB 14048
International Standard: IEC 60947-4-1
The relays can be mounted onto contactors or installed as single units.
Protection Characteristics
|
Item |
NO. |
Times the Setting current |
Release time |
Test condition |
|
|
Overload protection |
1 |
1.05 |
>2h |
Star from Cold Status |
|
|
2 |
1.2 |
<2h |
Start From Hot status Right after item no.1 |
||
|
3 |
1.5 |
<2m |
|||
|
4 |
7.2 |
2s<Tp≤10s |
Start from Cold status |
||
|
Phase Failure protection |
Any two phase |
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.5 |
|
