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 mmflexible cable without cable end
1×1…4 mmflexible cable with cable end
1×1…6 mmrigid 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 mmflexible cable without cable end
1×1…2,5 mm2/2×1…2,5 mmflexible cable with cable end
1×1…2,5 mm2/2×1…2,5 mmrigid 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

JR28 Thermal Overload Relay 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.

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