+086-15305925923

K-WANG

Service expert in industrial control field!
NameDescriptionContent
Adequate Inventory, Timely Service
pursuit of excellence 
Ship control system
Equipment control system
Power monitoring system
Current position:
新闻动态
newS
   
Brand

ABB TK516 Thermal Overload Relay and Circuit Board Circuit Breaker

From: | Author:Wang | Time :2025-05-14 | 40 visit: | Share:

ABB TK516 Thermal Overload Relay and Circuit Board Circuit Breaker

ABB TK516 thermal overload relay

Functions and Applications

ABB TK516 thermal overload relay plays a crucial role in industrial electrical systems, mainly used for overload protection of three-phase motors. In actual production, electric motors often experience overload due to various reasons, such as sudden increase in mechanical load, improper motor selection, etc. If the overload situation cannot be dealt with in a timely manner, it will cause the motor winding to overheat, accelerate insulation aging, and in severe cases, even burn out the motor. The TK516 thermal overload relay can monitor the motor current in real time. Once the current exceeds the set overload threshold, it will quickly act, cut off the control circuit, and protect the motor from being burned out, ensuring the stable operation of production equipment. For example, in the large-scale ventilation fan system of a factory, if the fan motor is overloaded due to air duct blockage or other reasons, the TK516 thermal overload relay can respond in a timely manner to prevent motor damage and ensure the continuous normal operation of the ventilation system.


Working principle

Its working principle is based on the current thermal effect. When the motor is running normally, the thermal element inside the thermal overload relay generates heat through the normal working current, causing the bimetallic strip to slowly bend, but the degree of bending at this time is not enough to trigger the action mechanism. However, once the motor is overloaded, the working current increases sharply, the thermal element heats up quickly, the temperature rises rapidly, and the bimetallic strip bends faster due to uneven heating. When the degree of bending reaches a certain level, push the action mechanism to open the normally closed contact and close the normally open contact. In the control circuit, normally closed contacts are usually connected in series in the coil circuit of the AC contactor. When the thermal overload relay is activated, the normally closed contacts open and the AC contactor coil loses power, thereby cutting off the main power supply line of the motor and achieving overload protection for the motor.


Key points for use

Current setting value setting: Accurate setting of current setting value is the key to realizing the protection function of TK516 thermal overload relay. In general, the setting value should be set between 0.95-1.15 times the rated current of the motor. If the setting value is set too high, when the motor is truly overloaded, the thermal overload relay may not be able to operate in a timely manner and fail to provide protection; If the setting value is set too small, the motor may frequently touch the thermal overload relay during normal operation, causing the motor to malfunction. For example, for a motor with a rated current of 10A, the setting value of the thermal overload relay can be set at around 9.5A during light load operation; If it is running under overload, it can be set to around 11A.

Maintenance of connection contacts: It is crucial to ensure that the contacts of the thermal overload relay are tightly connected to the circuit. If the contact is not in good contact, additional resistance will be generated during operation, resulting in heating, which may cause the thermal overload relay to malfunction. Therefore, in installation and daily maintenance, it is necessary to regularly check the contact connections to ensure their firmness and reliability.

Reset operation: After the thermal overload relay is activated, the reset method should be selected reasonably according to the actual application scenario. In the case of unmanned operation on site, the reset mode should be set to manual reset to prevent the motor from automatically resetting and starting when the fault is not resolved, which may cause secondary faults or safety accidents. In scenarios where someone is on duty and can handle faults in a timely manner, automatic reset or manual reset can be selected according to the needs.


Circuit board circuit breaker

Functions and Applications

Circuit board circuit breakers are mainly used for overload and short circuit protection of circuits on circuit boards. In modern industrial automation control systems, circuit boards undertake important functions such as signal processing and control instruction transmission. Once the circuit on the circuit board is overloaded or short circuited, it may damage the electronic components on the circuit board and cause the entire control system to malfunction. Circuit board circuit breakers can quickly cut off the circuit when there is an abnormal increase in current, protecting the safety of the circuit board and related electronic equipment. For example, in the PLC control cabinet of an industrial automation production line, circuit board circuit breakers can effectively protect PLC circuit boards, communication circuit boards, etc., ensuring stable operation of the production line's automation control.


Working principle

Circuit board circuit breakers typically use bimetallic or electromagnetic working principles. Bimetallic circuit board circuit breakers are similar to thermal overload relays, utilizing the thermal effect generated by current passing through the bimetallic strip. When the circuit is overloaded, the current increases, and the bimetallic strip heats up and bends. After reaching a certain degree, it pushes the release mechanism to operate and disconnect the circuit. Electromagnetic circuit board circuit breakers are based on the principle of electromagnetic induction. When a short circuit occurs in the circuit, the short-circuit current instantly increases, generating a strong electromagnetic force that causes the trip mechanism to quickly operate and cut off the circuit.


Key points for use

Selection and adaptation: When selecting a circuit breaker for a circuit board, it is necessary to ensure that its rated current, rated voltage, and other parameters match the actual working requirements of the circuit board. If the rated current is selected too low, the circuit breaker may trip frequently during normal operation of the circuit; If the rated current is selected too high, the circuit breaker may not be able to operate in a timely manner when the circuit experiences overload or short circuit. For example, for a circuit board with a working voltage of 24V and a normal working current of 2A, a circuit board circuit breaker with a rated voltage of not less than 24V and a rated current of around 2.5A-3A should be selected.

Installation position: The circuit board circuit breaker should be installed near the power input end of the circuit board to quickly detect abnormal currents in the circuit and cut off the circuit in a timely manner. At the same time, the installation location should be convenient for maintenance and repair, and easy to reset or replace after the circuit breaker is activated.

Regular inspection: Regularly inspect the circuit board circuit breaker to see if there is any damage, deformation, etc. on its appearance, and check if there is any burning phenomenon on the contacts. In addition, by simulating overload or short circuit tests, the sensitivity and reliability of the circuit breaker's action can be detected to ensure that it can function properly in critical moments for protection.

ABB Thermal Overload Relay at ₹ 700/piece | Relay in Ahmedabad | ID ...


  • ABB CAI04 - Analog Input Module
  • ABB PM866-2 3BSE050201R1 - Process Manager Module
  • ABB CP405 A0 1SAP500405R0001 - Communication Processor
  • ABB R474A11XE HAFAABAAABE1BCA1XE - Protection Relay
  • ABB REF542PLUS 1VCR007346 - Protection Relay
  • ABB REF542PLUS 1VCF752000 - Protection Relay
  • ABB PPD113B03-26-100100 3BHE023584R2625 - Power Distribution Module
  • ABB PCD232A 3BHE022293R0101 - Process Control Module
  • ABB PFEA113-65 3BSE050092R65 - Process Control Module
  • ABB XVC768102 3BHB007211R102 - Control Module
  • ABB XVC767AE102 3BHB007209R0102 - Control Module
  • ABB CI857K01 3BSE018144R1 - Communication Interface Module
  • ABB 3ASC25H219B DATX133 - Control System Module
  • ABB 3ASC25H208 DATX100 - Control System Module
  • ABB 3ASC25H214 DATX130 - Control System Module
  • ABB 3ASC25H204 DAPU100 - Control System Module
  • ABB 3ASC25H216A DATX132 - Control System Module
  • ABB LWN2660-6 - Communication Module
  • ABB ICSE08B5 FPR3346501R1012 - Interface Module
  • ABB 1MRK00008-KB - Protection Relay Component
  • ABB UAD155A0111 3BHE029110R0111 - Control Module
  • ABB PU515A 3BSE032401R1 - Power Unit Module
  • ABB TU810V1 3BSE013230R1 - Terminal Unit
  • ABB XO08R2 1SBP260109R1001 - Output Module
  • ABB 3BHL000986P0006 - Communication Module
  • ABB SC540 3BSE006096R1 - System Controller
  • ABB REF615C_E HCFDACADABC2BAN11E - Protection Relay
  • ABB 5SHY4045L0001 3BHB018162R0001 3BHE009681R0101 GVC750BE101 - IGBT Power Module System
  • ABB P4LQA HENF209736R0003 - Power Module
  • ABB FENA-11 - Network Module
  • ABB COM0003 2RAA005844A0006A - Communication Module
  • ABB AIM0006 2RCA021397A0001F - Analog Input Module
  • ABB REF615C_C HCFFAEAGANB2BAN1XC - Protection Relay
  • ABB S-073N 3BHB009884R0021 - Power Module
  • ABB REF615E_E HBFHAEAGNCA1BNN1XE - Protection Relay
  • ABB TP830 3BSE018114R1 - Touch Panel
  • ABB 5SHX2645L0004 3BHL000389P0104 3BHB003154R0101 5SXE04-0150/GVC707AE01 - IGBT Power Module System
  • ABB DSAI146 3BSE007949R1 - Analog Input Module
  • ABB LC-608 - Control Module
  • ABB TK803V018 3BSC950130R1 - Terminal Module
  • ABB RF522 3BSE000743R1 - Field Communication Module
  • ABB DSRF197 3BSE019297R1 - System Module
  • ABB DSAO120A 3BSE018293R1 - Analog Output Module
  • ABB DSDP170 57160001-ADF - Process Control Module
  • ABB DSBC176 3BSE019216R1 - System Module
  • ABB DSDO115A 3BSE018298R1 - Digital Output Module
  • ABB DSDI110AV1 3BSE018295R1 - Digital Input Module
  • ABB BC810K01 3BSE031154R1 - Base Controller
  • ABB 5SHY3545L0010 3BHB013088R0001 3BHE009681R0101 GVC750BE101 - IGBT Power Module System
  • ABB 81943A041-1 - Industrial Component
  • ABB PM865K01 3BSE031151R1 - Process Manager Module
  • ABB SA168 3BSE003389R1 - System Module
  • ABB 5SHY3545L0016 3BHB020720R0002 3BHE019719R0101 GVC736BE101 - IGBT Power Module System
  • ABB TP853 3BSE018126R1 - Touch Panel
  • ABB REM545AG228AAAA - Protection Relay
  • ABB CI626A 3BSE005029R1 - Communication Interface Module
  • ABB NDCU-12C NDCU-12CK - Network Control Unit
  • ABB REM615C_D HCMJAEADAND2BNN1CD - Protection Relay
  • ABB IBA 940143201 - Interface Module
  • ABB PFSK151 3BSE018876R1 - Process Control Module
  • ABB IDPG 940128102 - Display Module
  • ABB PP825 3BSE042240R1 - Panel Module
  • ABB OCAH 940181103 - Control Module
  • ABB OCAHG 492838402 - Control Module
  • ABB TP857 3BSE030192R1 - Touch Panel
  • ABB PP865A 3BSE042236R2 - Panel Module
  • ABB CI854A-EA 3BSE030221R2 - Communication Interface Module
  • ABB SCYC51020 58052582H - System Control Module
  • ABB SCYC51090 58053899E - System Control Module
  • ABB SCYC51010 58052515G - System Control Module
  • ABB CB801 3BSE042245R1 - Communication Module
  • ABB SCYC51040 58052680E - System Control Module
  • ABB 5SHY4045L0001 3BHB018162R0001 - IGBT Power Module
  • ABB 5SHY6545L0001 AC10272001R0101 5SXE10-0181 - IGBT Power Module System
  • ABB RMU811 - Remote Monitoring Unit
  • ABB RFO810 - Field Output Module
  • ABB CS31 - Control System
  • ABB TVOC-2-240 1SFA664001R1001 - Voltage Controller
  • ABB SDCS-AMC-CLAS2 - Drive System Module
  • ABB LDSTA-01 - Display Module
  • ABB GJR5252300R3101 07AC91H - Control Module
  • ABB GJR5252300R3101 07AC91F - Control Module
  • ABB TB711F 3BDH000365R0001 - Terminal Base
  • ABB PM783F 3BDH000364R0001 - Process Manager Module
  • ABB CM772F 3BDH000368R0001 - Communication Module
  • ABB TU715F 3BDH000378R0001 - Terminal Unit
  • ABB DC732F 3BDH000375R0001 - DC Controller
  • ABB TTH300 - Terminal Module
  • ABB PFEA111-65 3BSE050091R65 - Process Control Module
  • ABB UNS3670A-Z V2 HIEE205011R0002 - Power Electronics Module
  • ABB RC527 3BSE008154R1 - Remote Controller
  • ABB 5SHY5055L0002 3BHE019719R0101 GVC736BE101 - IGBT Power Module System
  • ABB PM864AK01 3BSE018161R1 - Process Manager Module
  • ABB DSDP140A - Process Control Module
  • ABB UBC717BE101 3BHE021887R0101 - Power Electronics Module
  • ABB PPC380AE01 HIEE300885R0001 - Power Controller
  • ABB UFC718AE01 HIEE300936R0001 - Power Electronics Module
  • ABB KUC720AE01 3BHB003431R0001 3BHB000652R0001 - Control Unit System
  • ABB DSAI130A 3BSE018292R1 - Analog Input Module
  • ABB TP854 3BSE025349R1 - Touch Panel
  • ABB 5SHY3545L0016 3BHB019719R0101 GVC736BE101 5SXE06-0160 - IGBT Power Module System
  • ABB 07KT97 GJR5253000R4270 - Control Terminal
  • ABB 07KT98 GJR5253100R4278 - Control Terminal
  • ABB 07KT98 GJR5253100R0278 - Control Terminal
  • ABB PFTL101B 5.0KN 3BSE004191R1 - Force Sensor
  • ABB 5SHX1445H0002 3BHL000387P0101 - IGBT Power Module
  • ABB 3HNM07686-1 3HNM07485-1/07 - Motor Module
  • ABB GRBTU 3BSE013175R1 - Terminal Unit
  • ABB DSMB127 57360001-HG - System Module
  • ABB DSBB110A 57330001-Y - System Module
  • ABB DSCS131 57310001-LM - System Module
  • ABB DSCA114 57510001-AA - System Module
  • ABB PFSK130 3BSE002616R1 - Process Control Module
  • ABB PFSK164 3BSE021180R1 - Process Control Module
  • ABB PFSK162 3BSE015088R1 - Process Control Module
  • ABB PFSK160A 3BSE009514R1 - Process Control Module
  • ABB DSBC172 57310001-KD - System Module
  • ABB DSMC112 57360001-HC - System Module
  • ABB DSRF180A 57310255-AV - System Module
  • ABB DSTC175 57310001-KN - Terminal Controller
  • ABB DSSB140 48980001-P - System Module
  • ABB UAC389AE02 HIEE300888R0002 - Control Module
  • ABB UNS0881a-P,V1 3BHB006338R0001 - Power Electronics Module
  • ABB KUC755AE105 3BHB005243R0105 - Control Unit
  • ABB KUC755AE105 3BHB005243R0105 - Control Unit
  • ABB PM783F 3BDH000364R0002 - Process Manager Module
  • ABB 5SHY3545L0009 3BHB013085R0001 3BHE009681R0101 GVC750BE101 - IGBT Power Module System
  • ABB LXN1604-6 3BHL000986P7000 - Communication Module