The overload relay Z can be mounted directly on contactor DIL M up to 250 A; Separate mounting of the relay possible; ZEB electronic overload relays up to 1500 A : Solution for enhanced motor protection; Self-supplying electronics avoids need for connection of an external supply voltage Contactors are typically built for and used in 3-phase applications where a relay is more commonly used in single phase applications. Then do motor supply connection with Overload relay. However, be aware that there are contactors that use different numbering systems. You can follow same method as i shown in below contactor wiring diagram for wiring 3 phase motor with circuit breaker, 3 pole motor stater and overload relay. With a relay there very well could be.
A thermal overload relay is a protective device which cuts the power whenever the motor uses too much current for a long period of time. These lines far exceed the 120 volts AC standard in most homes. 3RB2906-2BG1 (0.3 to 3 A), in combination with a 3UF1868-3GA00 (820 A/1 A) series transformer. Overload Relays General data 7 Overview Available-- Not available 1) Motor currents up to 820 A can be recorded and evaluated by a current measuring module, e.g. Within our range of contactor and control relay overloads, we feature thermal overload relays. Relatively smaller in size: Larger when compared to Relays: Used in circuits with lower ampacity. Fill up the following data of relay under test. Hence, Contactor must rating must be AC-3 duty with a current rating more than 12.28A and making breaking current more than or equal to 102A. A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Thermal overload relays are economic electromechanical protection devices for the main circuit. a) Relay Type _____ b) Relay Range _____ ... Relay Range Contactor Back up fuse SDF hp kW In hp kW In (A) Rating Type 16 1.0 0.75 7.5 5.0 3.7 7.5 6-10 MLO 20 HF FN32 Many of these use small heaters, often bi-metallic elements that bend when warmed by current to the motor. This means that with a contactor, when it is de-energized there is (typically) no connection. Contactor vs Relay Applications. Relays Contactor; Relays are switching devices used in any control circuit for checking a condition or multiplying the number of contacts available.
3. You can follow same method as i shown in below contactor wiring diagram for wiring 3 phase motor with circuit breaker, 3 pole motor stater and overload relay. Then wire the overload relay with MC. China Overload Relay And Contactor wholesale - high quality Overload Relay And Contactor products in best price from china manufacturers, Overload Relay And Contactor suppliers, wholesalers and factory on topchinasupplier.com Then wire the overload relay with MC. The overload contacts are connected in series and located between the contactor and the motor itself to prevent the motor from restarting once the overload trips. Then do motor supply connection with Overload relay. An overload relay is made up of a heater paired with normally-closed contacts that open once the heater gets too hot. Many large pieces of equipment are powered directly from high voltage lines. Then Do connection between CB and MC. The wiring diagram of an overload relay is shown below, and the connections of an overload relay symbol may seem like two opposite question marks otherwise like ‘S’ symbol. Contactors are switching devices used to control power flow to any load. Relays on the other hand can and often are both Normally Open and/or Normally Closed depending on the desired function. Thermal overload relays. Thermal Overload Relay setting = 70%x Full Load Current(Phase) Overload Relay Connection Diagram. The wiring diagram of an overload relay is shown below, and the connections of an overload relay symbol may seem like two opposite question marks otherwise like ‘S’ symbol. 2 days ago i wired 380 to 440 volts contactor for a 3 phase motor and save these images of contactor in PC. For 3UF18 transformers, see "Monitoring and Control Devices" How to Wire a Contactor. Selection of thermal overload Min. (Max 20A) Then connect the earth led wire to the motor body. Overload Relay Connection Diagram. The Tesys K range contactors (LC1K****) and Tesys LR overloads (LR2K****) have additional pins on their overloads to make direct connection to terminals 14 on contactor to 95 on overload and A2 on contactor to 96 on overload. When current is too high for too long, heaters open the relay contacts carrying current to the coil of the contactor.
The Tesys K range contactors (LC1K****) and Tesys LR overloads (LR2K****) have additional pins on their overloads to make direct connection to terminals 14 on contactor to 95 on overload and A2 on contactor to 96 on overload. Overload relays protect a motor by sensing the current going to the motor. OF RELAY Connections of Thermal Overload Relay for O/L Testing TESTING OF THERMAL OVERLOAD RELAY 1. These devices are directly related to … The overload relay working/function is discussed below.. The overload relay working/function is discussed below.. The thermal overload relay can make up a compact starting solution together with contactors.
Then connect the earth led wire to the motor body. Then Do connection between CB and MC.