Thermal Overload Relay Setting

The class number indicates the response time in seconds.

Thermal overload relay setting. Selection of thermal overload. Some manufacturers have the 125 setting built in which means you must set the overload protection at the motor s nameplate current. However if motors are designed with a service factor which is then shown on the nameplate eg. The required overload protection setting for motors is 125 of their full load current according to the nec but make sure you read the overload relay instructions as well.

Overload relays and their heaters belong to one of three classes depending on the time it takes for them to respond to an overload in the motor. Thermal overload relay setting 100 x6 6 amp. Thermal overload relay bekerja saat suhu pada dalam tor tersebut terpenuhi jadi tor ini terdapat sebuah settingan berapa maksimum amper untuk melakukan trip jika ampere tersebut sudah terpenuhi didalam tor tersebut ada sebuah bimetal element yang menjadi panas saat ampere beban sudah melebihi ampere settingan tor. Thermal overload relay setting 100 x full load current line.

The current can be set between the upper and lower limits provided. Thermal overload relay setting 120 x4 4 amp. These include class 10 20 and 30. Thermal overload relay phase.

2 thermal overload set incorrectly. Overload relay is the one of important device for motor control it can prevent our motor from overheat or winding burning due overload of ampere. Thermal overload relay setting 120 x12 28 14 7a. Thermal overload relay setting 70 x12 28 8 6a max.

Thermal overload relay setting 120 x full load current phase max. The overload relay itself will have markings to indicate which class it belongs to. We need to setting the value of overload relay properly depend on our application and motor full load ampere if we setting low from fla it can cause motor trip c0ntinues and process not running smoothly. 1 15 the set current for the overload relay can be raised by 15 compared to full load current or to the service factor amps sfa which is normally indicated on the nameplate.

Size and type of. Cara setting thermal overload relay identik dengan rumus diatas setting trip overload. In the case of electronic overload relay an additional knob for tripping class selection is also provided. Thermal overload relay setting 70 x4 3 amp.

A reset button is present over the overload relay to reset the overload relay after a trip and clearance of fault. If the motor is connected in star 440 v 60 hz the overload relay then has to be set to 3 1 a. Thermal overload relay setting 120 x full load current phase max. Hence overload must be chosen closer to the range of 8 6 14 7.