The JR28S-93 thermal overload relay from CNC Electric is designed to protect motors and circuits operating at AC 50Hz, 380V against overload, phase failure, and locked-rotor conditions. With a current adjustment range of 80–104A, it’s ideal for high-capacity motor applications in demanding industrial environments.
This relay features manual or automatic reset, temperature compensation, and phase loss protection. It includes NO and NC auxiliary contacts, a test button, and a stop button for convenient operation. Safety is reinforced with a finger protection shield and a mistake-proof blocking device. The unit supports stack (Z) or separate (F) mounting and complies with IEC 60947-4-1 standards.
TECHNICAL DETAILS:
| Parameter | Value |
| Model | JR28S-93 |
| Current Adjustment Range | 80–104A |
| Rated Operational Voltage (Ue) | AC380V |
| Rated Insulation Voltage (Ui) | AC660V |
| Rated Frequency | 50Hz |
| Tripping Class | Class 10A |
| Auxiliary Contact Ratings | AC-15: Ue = 380V, Ie = 0.95A |
| Main Circuit Ratings | Ui = 380V, Ith = 5A |
| Impulse Withstand Voltage (Uimp) | 6kV |
| Pollution Degree | Class 3 |
| Installation Category | Class III |
| Mounting Type | Stack (Z) or Separate (F) |
| Ambient Temperature Range | –5°C to +40°C |
| Altitude Limit | ≤ 2000m |
| Humidity | ≤ 50% at 40°C; ≤ 90% at 20°C |
| Compliance | CE, IEC 60947-4-1 |
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