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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RR2242-2FW30 |
| Alternative Part Number | 3RR22422FW30 |
| Manufacturer | Siemens |
| Product Type | Monitoring Relay |
| Contactor Compatibility | Can be mounted to Contactor 3RT2, Size S0 standard |
| Current Monitoring Range | Digitally adjustable apparent/active current monitoring 4-40 A |
| Supply Voltage | 24-240 V AC/DC |
| Frequency Range | 20-400 Hz |
| Phase | 3-phase |
| Output Contacts | 1 change-over contact, 1 semiconductor output for alarm and warning |
| Monitoring Functions | Current overshoot and undershoot, Phase failure, Cable break, Phase sequence, Residual current, Blocking current |
| Fault Buffer | Warning and alarm thresholds with or without fault buffer |
| On Delay | 0-99 s |
| Noise Pulse Suppression | 0-30 s |
| Pause After Fault | 0-300 min |
| Connection System | Spring-type connection |
| Protection Class | IP20 |
| Insulation Voltage | Rated at 690 V for overvoltage category III with degree of pollution 3 |
| Surge Voltage Resistance | Rated value 6 kV |
| Ambient Temperature Range | Operating: -25 to +60 °C, Storage: -40 to +80 °C |
| Installation Altitude | Up to 2,000 m above sea level |
| Mechanical Service Life | Typical 10,000,000 mechanical operating cycles |
| EMC | Emitted interference and immunity according to IEC 60947-1 ambience A (industrial sector) |
| Shock Resistance | 15g / 11 ms |
| Vibration Resistance | 10 ... 55 Hz / 0.35 mm |
| Dimensions (H x W x D) | 109 mm x 45 mm x 92 mm |
The Siemens 3RR2242-2FW30 is a sophisticated monitoring relay designed for seamless integration with 3RT2 contactors, size S0. This device is engineered to provide precise digital adjustment of apparent and active current monitoring ranging from 4 to 40A, across a frequency spectrum of 20 to 400 Hz, suitable for three-phase power systems. It operates with a supply voltage of 24-240 V AC/DC, ensuring versatility across various electrical installations.
This monitoring relay is equipped with a single change-over contact and a semiconductor output for alarm and warning signals, enhancing its functionality for industrial applications. It is adept at monitoring for a variety of electrical issues including current overshoot and undershoot, phase failure, cable break, phase sequence, residual current, and blocking current. The device also features adjustable thresholds for warning and alarm signals, with or without fault buffer, and offers ON delay settings from 0 to 99 seconds, noise pulse suppression from 0 to 30 seconds, and a pause after fault ranging from 0 to 300 minutes.
The 3RR2242-2FW30 is designed with a spring-type connection system for ease of installation and maintenance. Its compact dimensions and the ability to mount in any orientation make it a flexible choice for various setups. The relay's robust construction ensures reliable operation even in demanding industrial environments, with a mechanical service life that is indicative of its durability and longevity.
With its advanced features and reliable performance, the Siemens 3RR2242-2FW30 monitoring relay is an essential component for industrial control systems, providing critical monitoring and protection functions that help maintain the integrity and efficiency of electrical operations.
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Frequently Asked Questions
What is the purpose of this monitoring relay?
The monitoring relay is designed for current monitoring applications. It can be attached to a contactor and is used to monitor electrical parameters such as current overshoot and undershoot, phase failure, cable break, phase sequence, residual current, and blocking current.
Can this relay be used with any size of contactor?
This relay is specifically designed to be mounted to a Siemens 3RT2 contactor of size S0, ensuring compatibility and ease of integration within the system.
How is the current monitoring range adjusted on this relay?
The current monitoring range is digitally adjustable, allowing for precise settings to match the requirements of the application.
What are the power supply requirements for this relay?
The relay requires a supply voltage of 24-240 V AC/DC, making it versatile for use in various power supply environments.
Does this relay have any delay functions?
Yes, it features ON delay, noise pulse suppression, and pause after fault functions, with adjustable time settings to cater to different operational needs.
What type of connection system does the relay use?
It utilises a spring-type connection system, which provides a secure and maintenance-free electrical connection.
What are the ambient temperature limits for operating this relay?
The relay can operate within an ambient temperature range of -25 to +60 degrees Celsius, ensuring reliable performance in a variety of environmental conditions.
Is there any protection against electrical shock?
Yes, the relay is designed with finger-safe terminals to provide protection against electrical shock during installation and maintenance.
What is the insulation voltage rating for this relay?
The relay has an insulation voltage rating of 690 V for overvoltage category III with a degree of pollution 3, offering robust protection against voltage transients.
How does this relay contribute to system diagnostics?
With its monitoring capabilities and semiconductor output for alarm and warning signals, the relay aids in system diagnostics by detecting and signalling various electrical faults, thereby helping to prevent potential damage to the system.
