3-phase thermal overload relay for AC motors, overcurrent and phase failure protection functions. It is used to provide overload protection open-phase protection and protection against unbalanced current for motors and it can also avoid heating in electrical equipment. Optional current setting range 55-70 Amp or 60-80 Amp, rated current 93A, working voltage rating 220V~690V, matched with 40A contactor, 100/125A gG or 63/80A aM fuse breaker.
Specification
| Model |
CCHN-JR28-93 |
| Current Setting Range (A) |
48-65 |
55-70 |
60-80 |
| Matching Fuse Breaker (A) |
100 gG |
125 gG |
125 gG |
| 63 aM |
80 aM |
80 aM |
| Trip Class |
40A |
| Frame Current (A) |
93A |
| Rated Working Voltage (V) |
3-phase 220V~690V |
| Rated Insulation Voltage (V) |
690V |
| Number of Contacts |
1NO + 1NC |
| Phase Failure Protection Function |
yes |
| Automatic & Manual Reset |
yes |
| Temperature Compensation |
yes |
| Tripping Indicator |
yes |
| Test Pushbutton |
yes |
| Mounting Mode |
Plug-in, independent |
| AC-15 220V Current Rating (A) |
2.73 |
| AC-15 220V Current Rating (A) |
1.58 |
| DC-13 220V Current Rating (A) |
0.2 |
| Cross Section Area of Conductor (mm2) |
Main Circuit |
Single core or standard wire |
4~35 |
| Wiring screw |
M4 |
| Auxiliary Circuit |
Single core or standard wire |
0.5~2.5 |
| Wiring screw |
M3.5 |
Details

Thermal Overload Relay Applications
- Thermal overload relays are often used in circuit protection, overload, phase failure, overtime start and locked-rotor for AC motors.
- Thermal overload relay has functions of phase failure protection, temperature compensation, adjustable setting current, automatic or manual reset, operation indicator, NP and NO auxiliary contacts separate insulation.
- The thermal overload relay has small installation area and various mounting methods. It has test button and stop button, which is convenient for checking the flexibility of operation.
- The protective cover of thermal overload relay can protect fingers from electric shock. The locking device can prevent misoperation.
- Thermal overload relay comes with remote operation, complete functions and excellent quality.
60/70/80 Amp Thermal Overload Relay Dimension Diagram (Unit: mm)
