JR28 3 Phase Thermal Overload Relay
JR28 3 phase thermal overload relay is a series of thermal overload relays. Thermal overload relay is the application of current thermal effect principle, often used for AC motor or other electrical equipment and circuit overcurrent. JR28 3 phase thermal overload relay from ATO supplier, rated operating current is available at 25A, 36A and 93A. The 3 phase thermal overload relay is equipped with a flame retardant shell to withstand wear and high temperature. JB28 series thermal overload relay with 380V rated operation voltage. Ambient air temperature of thermal over load relay between -5 ℃ and 40 ℃. Thermal overload relays wholesale to find ATO, we will provide you with satisfactory services and relays.
- 3 phase unbalance protection device.
- Overload protection, power failure protection and motor protection of thermal overload relay.
- There is a stretching spring flip jumping mechanism to ensure that the contact action is rapid and reliable.
- A flame-retardant housing can fully protect the relay from damage, wear resistance and high temperature resistance. JR36 thermal overload relay also has flame-retardant shell.
- Thermal overload relay with CE certification.
|Rated Insulation Voltage||690V||690V||690V|
|Automatic & Manual Reset||yes||yes||yes|
|Auxiliary Contact||1NO + 1NC||1NO + 1NC||1NO + 1NC|
|Rated Operating Current||220V||2.73A||2.73A||2.73A|
|Traverse Cross-sectional Area||Major Loop||Single Core or Stranded Wire||1~4||6~10||6~35|
|Auxiliary Loop||Single Core or Stranded Wire||2*(0.5-1)||2*(0.5-1)||2*(0.5-1)|
JR28 Thermal Overload Relay Structure:
JR28 Thermal Overload Relay Dimension: (Unit: mm)
JR28 thermal overload relay is also called thermal relay, which is a 3 phase overload relay, using the principle of current thermal effect, using electrical thermosensitive bimetal as sensitive components. The electrical thermosensitive bimetal sheet is heated and rolled by two alloys with a large difference in linear expansion coefficient. When heated, the bimetallic sheet bends from the high expansion layer to the low expansion layer. When the current is too large, the element will act due to heating.
JR28 3 phase thermal overload relays are used for AC motor overload protection, and there are many types. 3-phase thermal overload relay is easy to install and use, has complete functions and low price. Practice has proved that thermal overload relays can reliably protect AC motors, so they have been widely used for a long time.