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Siemens 3RU2126-4NB0 Overload Relay
Brand:
Series:
3RU21
Setting Current Range:
23-28A
Applicable Contactor:
3RT20 2
Product Type:
Electric heating
Model:
3RU2126-4NB0
Order Number:
3RU21264NB0
Description:
Siemens overload relay 3RU2126-4NB0, electric heating, suitable for contactor 3RT20 2, setting current range 23-28A
Product parameters
| Product attributes | Attribute value | Filter product attributes |
|---|---|---|
| Brand： | Siemens | |
| Series： | 3RU21 | |
| Setting Current Range： | 23-28A | |
| Applicable Contactor： | 3RT20 2 | |
| Product Type： | Electric heating |
Products with the same attribute : 0
Show details
Series Overview
Series Overview
Applications
- The 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, three poles must be used in series.
Ambient Temperature
- According to the IEC 60947 - 4 - 1 standard, the 3RU21 thermal overload relay has a temperature compensation function within the temperature range of - 40 to + 60 °C. For the temperature range of + 60 °C to + 80 °C, the upper - limit setting value must be corrected according to the correction coefficients given in the following table.
| Cabinet Temperature (°C) | Correction Coefficient for Upper - Limit Setting Value | |||
|---|---|---|---|---|
| S00, S0 (1.8...20 A) | S0 (17...40 A) | S2 (8...45 A) | S2 (55...80 A) | |
| + 60 | 1.0 | 1.0 | 1.0 | 1.0 |
| + 65 | 0.94 | 0.97 | 0.94 | 0.97 |
| + 70 | 0.87 | 0.94 | 0.87 | 0.94 |
| + 75 | 0.81 | 0.90 | 0.81 | 0.90 |
| + 80 | 0.73 | 0.86 | 0.73 | 0.86 |
Tripping Class
The 3RU21 thermal overload relay is used for CLASS 10 normal starting conditions. For the detailed definition of the tripping class, please refer to relevant documents.
-
Connector for connecting with contactor:It achieves perfect electrical and mechanical connection with the contactor. Through these connectors, the overload relay can be directly plugged with the contactor. It is also possible to choose an independent mounting bracket for independent installation.
-
Manual/automatic reset (RESET) selector switch and reset button:Through this selector switch, you can switch between manual and automatic reset. When manual reset is selected, you can reset directly on the device by pressing the RESET button.
-
Switch status indication and action mechanism test (TEST):It indicates the action status of the thermal overload relay and performs a mechanical function test on the action mechanism.
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Overload current setting:The overload setting current can be conveniently adjusted through the large knob.
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STOP (stop button) button:When the STOP button is pressed, the normally closed contact opens, and the connected contactor disconnects. When the STOP button is released, the normally closed contact closes again.
-
Terminal:The 3RU21 thermal overload relay can provide screw - type, spring - type or ring - type wiring terminals.
Rachel
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