JR28 Thermal Overload Relay
VIOX’s JR28 thermal overload relay protects AC motors from overload and phase failure. Operating at 50/60Hz up to 690V, it covers 0.1-93A range. Features include manual/automatic reset, temperature compensation, and clear status display. Compliant with IEC 60947-4-1, it offers IP2X protection and -30°C to +55°C operation. Ideal for industrial machinery, HVAC, and manufacturing equipment, this CE-certified relay ensures comprehensive motor protection across various applications. Its versatile design accommodates different current ranges and contactor sizes, providing flexible protection solutions.
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JR28 Thermal Overload Relay
Overview
The VIOX JR28 series thermal overload relays are designed to protect AC motors from overload and phase failure. These relays offer comprehensive protection for motors operating at 50/60Hz frequency with voltages up to 690V and currents ranging from 0.1A to 93A.
Key Features
- Wide Operating Range: Suitable for 50/60Hz, up to 690V AC
- Versatile Current Protection: 0.1-93A range
- Multiple Protection Functions: Overload and phase failure protection
- Flexible Reset Options: Manual and automatic reset available
- Temperature Compensation: Ensures reliable protection across various conditions
- Status Indication: Clear ON/OFF status display
- International Compliance: Meets IEC 60947-4-1 standards
Technical Specifications
| Main circuit characteristics | |
|---|---|
| Rated insulation voltage Ui | 690V |
| Rated impulse withstand voltage Uimp | 6kV |
| Tripping class | 10A |
| Current setting range | 0.4…0.63A |
| Conductors cross-section | 1×1,5…10 mm2 flexible cable without cable end 1×1…4 mm2 flexible cable with cable end 1×1…6 mm2 rigid cable without cable end |
| Tightening torque | 1,85 N·m |
| Auxiliary contacts characteristics | |
| Conventional thermal current | 5A |
| Max power of the contactor coil | 100VA at 24V AC 200VA at 48V AC 400VA at 110V AC 600VA at 220V AC 600VA at 380V AC 600VA at 600V AC |
| Short-circuit protection | fuse gG 5A |
| Conductors cross-section | 1×1…2,5 mm2/2×1…2,5 mm2 flexible cable without cable end 1×1…2,5 mm2/2×1…2,5 mm2 flexible cable with cable end 1×1…2,5 mm2/2×1…2,5 mm2 rigid cable without cable end |
| Tightening torque | 1,2 N·m |
| Environmental characteristics | |
| Degree of protection | IP2X |
| Operating temperature | -30°C…+55°C |
| Storage temperature | -60°C…+70°C |
| Test | Series No. | I/In | Operating time, Tp | Start condition | |
|---|---|---|---|---|---|
| Overload protection | 1 | 1,05 | > 2h | Cold state | |
| 2 | 1,2 | < 2h | Heat state following the No.1 test | ||
| 3 | 1,5 | < 4min | Heat state following the No.1 test | ||
| 4 | 7,2 | 2s<Tp≤10s | Cold state | ||
| Phase failure protection | 5 | any 2 phases | another phase | > 2h | Cold state |
| 1,0 | 0,9 | ||||
| 6 | 1,15 | 0 | < 2h | Heat state following the No.5 test | |
Dimension
Model
| Item | Code | Rated current(A) | Contactor |
| JR28-13 | 1301 | 0.1-0.16 | CJX2-09 CJX2-12 CJX2-18 CJX2-25 |
| 1302 | 0.16-0.25 | ||
| 1303 | 0.25-0.4 | ||
| 1304 | 0.4-0.63 | ||
| 1305 | 0.63-1 | ||
| 1306 | 1-1.6 | ||
| 1307 | 1.6-2.5 | ||
| 1308 | 2.5-4 | ||
| 1310 | 4-6 | ||
| 1312 | 5.5-8 | ||
| 1314 | 7-10 | ||
| 1316 | 9-13 | ||
| 1321 | 12-18 | ||
| 1322 | 17-25 | ||
| 1353 | 23-32 | ||
| JR28-23 | 2353 | 23-32 | CJX2-32 |
| 2355 | 28-36 | ||
| JR28-33 | 3353 | 23-32 | CJX2-40 CJX2-50 CJX2-65 CJX2-80 CJX2-95 |
| 3355 | 30-40 | ||
| 3357 | 37-50 | ||
| 3359 | 48-65 | ||
| 3361 | 55-70 | ||
| 3363 | 63-80 | ||
| 3365 | 80-93 |
Certifications
- CE
Applications
Ideal for motor protection in:
- Industrial machinery
- HVAC systems
- Pumps and compressors
- Conveyor systems
- Manufacturing equipment
- Process control systems
- Material handling equipment
Benefits
- Comprehensive motor protection against overload and phase failure
- Flexible installation options for various control panel designs
- Accurate protection with temperature compensation
- Easy monitoring with clear status indication
- Adaptable to different motor sizes with wide current range
- Compliant with international safety standards
- Suitable for continuous operation in industrial environments
Product Range
The JR28 series includes multiple models to accommodate different current ranges and contactor sizes. Please refer to the detailed specification chart for specific model information and compatibility with various contactors.
