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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RB2283-4AC1 |
| Alternative Part Number | 3RB22834AC1 |
| Manufacturer | Siemens |
| Product Type | Overload Relay |
| Contact Configuration | 2NO/2NC (2 Normally Open, 2 Normally Closed) |
| Voltage Rating | 1000 V ac |
| Number of Poles | 3 Poles |
| Terminal Type | Spring Loaded Terminal |
| Dimensions | 95 x 45 x 111 mm |
| Product Function | Evaluation unit for full motor protection |
| Installation Altitude | Up to 2000 metres above sea level |
| Ambient Operating Temperature | -25 to +60 °C during operation |
| Storage Temperature | -40 to +80 °C |
| Relative Humidity | Up to 100% during operation |
| Insulation Voltage | Rated at 300 V ac with degree of pollution 3 |
| Surge Voltage Resistance | Rated value 4 kV |
| Protection Class | IP20 |
| Compliance | EMC, For use in hazardous locations as per ATEX directive 2014/34/EU, PTB 05 ATEX 3022 |
| Adjustable Current Response | 0.3 to 630 A for the current-dependent overload release |
| Operational Current | Rated at 630 A for main circuit |
| Control Supply Voltage | 24 to 240 V ac at 50/60 Hz |
| Auxiliary Contacts | 2 NC and 2 NO, with operational current at AC-15: 6 A at 24 V, 6 A at 110 V, 6 A at 120 V |
The Siemens 3RB2283-4AC1 is a state-of-the-art overload relay designed to offer comprehensive motor protection. This evaluation unit is suitable for a wide range of industrial applications, ensuring that motors operate within safe parameters, thus extending their service life and reducing downtime due to maintenance.
Crafted for standalone installation, this solid-state overload relay is compatible with contactors from size S00 to S12, making it a versatile choice for various motor sizes. The unit features a tripping class of 5 to 30, which allows for precise adjustment to match the protective needs of different motor applications.
The 3RB2283-4AC1 is equipped with three poles for the main current circuit and offers both manual and automatic reset options, providing flexibility in control and response to overload conditions. The auxiliary circuit boasts spring-loaded terminals, which facilitate quick and secure connections, enhancing the reliability of the entire system.
With an insulation voltage rated at 300 V and a surge voltage resistance of 4 kV, this overload relay is built to withstand challenging electrical environments. It also carries an IP20 protection class rating on the front, ensuring that the internal components are shielded from solid foreign objects.
The compact dimensions of 95 x 45 x 111 mm make this unit easy to integrate into existing setups without requiring significant space. Additionally, the overload relay can operate in a wide range of ambient temperatures, from as low as -25 °C to as high as +60 °C, ensuring consistent performance even in harsh industrial conditions.
The 3RB2283-4AC1 also features two normally closed (NC) and two normally open (NO) contacts for auxiliary functions, providing additional control options within the motor control circuit.
Overall, the Siemens 3RB2283-4AC1 is a robust and reliable solution for motor protection, designed to meet the rigorous demands of industrial applications while maintaining the integrity and efficiency of motor operations.
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Frequently Asked Questions
What is the purpose of the Siemens overload relay?
The Siemens overload relay is designed for full motor protection, providing a safeguard against excessive current which can cause overheating and potential damage to electric motors.
Can this overload relay be used with different sizes of contactors?
Yes, the overload relay is compatible with contactors ranging from size S00 to S12, allowing for flexibility in various applications.
What type of terminals does this overload relay have?
The relay is equipped with spring-loaded terminals for the auxiliary and control circuit, ensuring a secure and maintenance-free connection.
Is there a manual reset function available on this relay?
Yes, the relay includes a manual reset function, as well as an automatic reset option, providing versatility in operation based on the application's requirements.
What is the maximum operational current for the main circuit?
The maximum operational current for the main circuit of the relay is rated at 630 A.
What are the ambient temperature limits for the operation of this relay?
The relay can operate within an ambient temperature range of -25 to +60 degrees Celsius, ensuring reliability across a wide range of environmental conditions.
How many poles does the main current circuit of the relay have?
The main current circuit of the relay has 3 poles.
What is the insulation voltage of the relay?
The insulation voltage of the relay, with a degree of pollution 3, is rated at 300 V AC.
Can the relay be used in hazardous locations?
Yes, the relay is suitable for use in hazardous locations and is compliant with the ATEX directive 2014/34/EU.
What is the maximum installation altitude for this relay?
The relay can be installed at altitudes up to 2000 meters above sea level without compromising its performance.
