The PR28 series thermal overload relay is engineered for AC circuits operating up to 660V, with a current capacity of 630A at 50/60Hz. It is specifically designed to safeguard AC motors against overcurrent conditions.
Equipped with a differential tripping mechanism and temperature compensation, the relay ensures consistent performance under varying conditions. It is suitable for direct integration with PCX2 series AC contactors and complies with IEC 60947-4-1 standards.
| Sr. No. | Times of the Setting Current (A) | Motion Time | Start Condition | Ambient Temperature | |||
|---|---|---|---|---|---|---|---|
| 1 | 1.05 | >2hr | Cold State | 20 ± 5°C | |||
| 2 | 1.2 | <2hr | Heat State (Following the No.1 Test) |
||||
| 3 | 1.5 | <4 Min | |||||
| 4 | 7.2 | 10A | 2s < Tp ≤ 10s | ≤ 63A | Cold State | ||
| 10A | 4s < Tp ≤ 10s | > 63A | |||||
| Sr. No. | Times of the Setting Current (A) | Motion Time | Start Condition | Ambient Temperature | |||
|---|---|---|---|---|---|---|---|
| Any two Phases | Another Phase | ||||||
| 1 | 1 | 0.9 | > 2hr | Cold State | 20 ± 5°C | ||
| 2 | 1.15 | 0 | < 2hr | Heat State (Following the No.1 Test) |
|||
| Type | Number | Setting Range (A) | For Contactor | |||
|---|---|---|---|---|---|---|
| PR28-25 | 1301 | 0.1 ~ 0.16 | PCX2-D09 | |||
| 1302 | 0.16 ~ 0.25 | PCX2-D09 | ||||
| 1303 | 0.25 ~ 0.40 | PCX2-D09 | ||||
| 1304 | 0.40 ~ 0.63 | PCX2-D09 | ||||
| 1305 | 0.63 ~ 1.00 | PCX2-D09 | ||||
| 1306 | 1.00 ~ 1.60 | PCX2-D09 | ||||
| 1307 | 1.60 ~ 2.50 | PCX2-D09 | ||||
| 1308 | 2.50 ~ 4.00 | PCX2-D09 | ||||
| 1310 | 4.00 ~ 6.00 | PCX2-D09 | ||||
| 1312 | 5.50 ~ 8.00 | PCX2-D09 | ||||
| 1314 | 7.00 ~ 10.00 | PCX2-D12 | ||||
| 1316 | 9.00 ~ 13.00 | PCX2-D18 | ||||
| 1321 | 12.00 ~ 18.00 | PCX2-D18 | ||||
| 1322 | 17.00 ~ 25.00 | PCX2-D25 | ||||
| PR28-36 | 2353 | 23.00 ~ 32.00 | PCX2-D32 | |||
| 2355 | 30.00 ~ 40.00 | PCX2-D40 | ||||
| PR28-93 | 3322 | 17.00 ~ 25.00 | PCX2-D25 | |||
| 3353 | 23.00 ~ 32.00 | PCX2-D32 | ||||
| 3355 | 30.00 ~ 40.00 | PCX2-D40 | ||||
| 3357 | 37.00 ~ 50.00 | PCX2-D50 | ||||
| 3359 | 48.00 ~ 65.00 | PCX2-D65 | ||||
| 3361 | 55.00 ~ 70.00 | PCX2-D80 | ||||
| 3363 | 63.00 ~ 80.00 | PCX2-D80 | ||||
| 3365 | 80.00 ~ 93.00 | PCX2-D95 | ||||
| PR28-150 | 4365 | 80.00 ~ 104.00 | PCX2-F115 | |||
| 4367 | 95.00 ~ 120.00 | PCX2-F150 | ||||
| 4369 | 110.00 ~ 140.00 | PCX2-F150 | ||||
