NYKR2 Series
Thermal Overload Relay
（25-630A）
Concise
Efficient
Safe
Comprehensive
PRODUCT OVERVIEW
NYKR2 series thermal overload relay is a protection device used to protect motors, and its main function is to detect whether the current of the motor exceeds the rated value during operation. Its working principle is trigger the protection based on the heat generated by the current through its control circuit. When there is an overload, it controls the switching devices to protect the line against overload. The thermal relay can effectively protect the motor from damage under abnormal conditions and prolong the service life of the motor. It’s widely used in industry and other fields, it can realize intelligent control and management.
PRODUCT CHARACTERISTICS
Simple and reliable
Thermal relay has simple structure and it utilizes mechanical action based on the principle of physical thermal expansion, which makes them very reliable with a low fault rate.
Cost effective
Compared with other types of protective devices, thermal relays have lower cost and are easy to install and maintain, which are suitable for applications at all scales.
Automatic reset function
Most thermal relays can be automatically reset when they cool down to normal temperature after triggering the protective device and being powered off, which is conducive to continuous operation and reduces downtime.
Time delay
Thermal relays have an inherent feature of time delay that allows them to wait for a motor to overload in a short period of time, which is useful in avoiding unnecessary and frequent tripping.
Selective protection
By appropriately setting the thermal relay, it is possible to respond to a specific current, enhancing the overall protection strategy of the system.
Environmental adaptability
Thermal relays are not susceptible to external electromagnetic interference, and its performance enables relatively stable operation under various environmental conditions.
Technical parameters
| Model | NYKR2-F25 | NYKR2-F36 | NYKR2-F95 | NYKR2-F150 | NYKR2-F220 | NYKR2-F630 | |
| Current rating | 25 | 36 | 95 | 150 | 220 | 630 | |
| Rated insulation voltage | 690V | 690V | 690V | 690V | 690V | 690V | |
| Phase failure protection | ● | ● | ● | ● | ● | ● | |
| Manual and automatic reset | ● | ● | ● | ● | ● | ● | |
| Temperature compensation | ● | ● | ● | ● | ● | ● | |
| Tripping indication | ● | ● | ● | ● | ● | ● | |
| Test button | ● | ● | ● | ● | ● | ● | |
| Stop button | ● | ● | ● | ● | ● | ● | |
| Installation method | Plug-in or free-standing | Plug-in or free-standing | Plug-in or free-standing | Plug-in or free-standing | Free-standing | Free-standing | |
| Auxiliary contact | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC | |
| Auxiliary circuit | AC-15 220V Rated currentA | 2.72 | 2.72 | 2.72 | 2.72 | 2.72 | 2.72 |
| AC-15 380V Rated currentA | 1.58 | 1.58 | 1.58 | 1.58 | 1.58 | 1.58 | |
| AC-13 220V Rated currentA | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
Selection table
| NYKR2 | F25 | Additional features |
| Product code | Casing grade | Additional features |
| NYKR2： Thermal Overload Relay |
F25 F36 F95 F150 F220 F630 |
Independent mounting base |
Note: NYKR2-F220, NYKR2-F630 are electronic thermal overload relays, the body adopts free-standing mode without mounting base.
NYKR2-F150 mounting base (free-standing) is independently guide rail mounted with NYKR2-F150 body, NYKR2-F150 mounting base (combined) is mounted in combination with NYKR2-F150 body, and can be directly connected with NYKC2-115, NYKC2-150 AC contactors.
Technical Parameters
NYKR2 SeriesThermal Overload Relay
-
Current rating：25
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
-
Current rating：36
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
-
Current rating：95
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
-
Current rating：150
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
-
Current rating：220
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
-
Current rating：630
Rated insulation voltage ：690V
Phase failure protection：Standard configuration
Manual and automatic reset：Standard configuration
Temperature compensation：Standard configuration
Tripping indication：Standard configuration
Test button：Standard configuration
Stop button：Standard configuration
Installation method：Plug-in or free-standing
Auxiliary contact：1NO+1NC
Auxiliary circuitAC-15 220V Rated current：2.72A
Auxiliary circuitAC-15 380V Rated current：1.58A
Auxiliary circuitDC-13 220V Rated current：0.2A
Selection table
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Product code ：NYKR2:Thermal Overload Relay
Casing grade：F25、F36、F95、F150、F220、F630
Additional features：Independent mounting base
Note: NYKR2-F220, NYKR2-F630 are electronic thermal overload relays, the body adopts free-standing mode without mounting base.
NYKR2-F150 mounting base (free-standing) is independently guide rail mounted with NYKR2-F150 body, NYKR2-F150 mounting base (combined) is mounted in combination with NYKR2-F150 body, and can be directly connected with NYKC2-115, NYKC2-150 AC contactors.
TYSEN-SAE Electrical Co., Ltd. Jiangsu ICP File No.16025679