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3RU1/2 Series Thermal Relays
3RU1/2 Series Thermal Relays
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3RU1/2 Series Thermal Relays
Classification:
Keywords
3RU1/2 Series Thermal Relays
Classification:
Keywords
3RU1/2 Series Thermal Relays
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- Product Description
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- Commodity name: 3RU1/2 Series Thermal Relays
The overload setting current can be easily adjusted through the large knob.
Overview
① Connector connected with contactor:
Perfect electrical and mechanical connection with the contactor. By means of these connectors, the overload relay can be plugged directly into the contactor. Separate mounting supports can also be selected for independent mounting.
② Manual reset (RESET) selection switch and reset button:
With this selector switch, you can switch between manual and automatic reset. When manual reset is selected, it can be reset directly on the device by pressing the RESET button.
③ Switch status indication and action mechanism test (TEST):
Indicate the thermal overload relay action status and perform mechanical function tests on the action mechanism.
④ Overload current setting:
The overload setting current can be easily adjusted through the large knob.
⑤ STOP button:
When the STOP button is pressed, the normally closed contact is opened and the contactor connected to it is disconnected. When the STOP button is released, the normally closed contacts reclose.
⑥ Wiring terminal:
The 3RU21 thermal overload relay is available with screw, spring or ring terminals.Application
3RU21 thermal overload relay can be used for the protection of three-phase and single-phase AC or DC motors.
If the 3RU21 thermal overload relay is used to protect single-phase AC or DC loads, it is necessary to use three poles in series.Ambient temperature
According to IEC60947-4-1 standards, the 3RU21 thermal overload relay has a temperature compensation function in the temperature range of -40 to 60°C.tripping level
The 3RU21 thermal overload relay is used for CLASS 10 normal starting conditions.
Tripping characteristic curve
At operating temperature, the trip time will be reduced by about 25%.
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86-0757-83992196
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