In industrial applications where very precise control of steam flow, temperature or pressure is required, the type of power switching in an electric boiler can make the difference between a stable and an inefficient process. In this context, solid state relays (SSRs) have become a key solution over traditional electromechanical contactors.
In this article we explain what SSRs are, when to install them in an electric steam generator and what benefits they provide when a fast, reliable and oscillation-free response is required.
What is a solid state relay (SSR)?
A solid state relay is an electronic device that acts as a switch, allowing or interrupting the passage of current to the boiler resistors.
Unlike mechanical contactors, SSRs have no moving parts: they work with semiconductors (such as triacs or thyristors), which gives them faster, quieter and longer-lasting switching.
Why are they relevant in electric steam boilers?
When the industrial process requires very fine control of thermal energy – for example, maintaining a constant steam temperature with variations in load or flow rate – SSRs allow more stable and faster modulation than classic contactors, which only operate for longer and less precise on/off cycles.
In which cases do we recommend installing SSRs in steam generators?
Solid state relays are especially recommended in the following cases:
- Very accurate temperature control (±1 °C or less) in chambers, pharmaceutical or food processes.
- Continuous steam pressure regulation in systems with high sensitivity or rapid consumption variations.
- Processes with PID control where proportional modulation of the heating power is required.
- Steam generators operating at short cycle times or with high switching frequency (e.g. in CIP cleaning, autoclaves or laboratories).
- Environments where operational silence is important (hospitals, laboratories).
Quick comparison: SSR vs. Contactors
| Feature | Mechanical contactors | Solid State Relays (SSR) |
| Switching speed | Slow (seconds) | Fast (milliseconds) |
| Operating noise | Yes (metal click) | No (totally silent) |
| Shelf life | Limited by mechanical wear | High, no physical wear and tear |
| Accuracy in thermal control | Low/medium | High (ideal for PID) |
| Maintenance required | Yes | Minimum |
| Initial cost | Lower | Higher |
Practical advantages of using SSR in Giconmes boilers
When it comes to Giconmes electric steam generators, there are many advantages to consider when deciding between a mechanical contactor and an SSR relay:
- Greater steam stability: less temperature or pressure fluctuations.
- Reduced system wear: by avoiding abrupt startup/shutdown.
- Better integration with PLCs and automation systems.
- Reduction of electrical maintenance.
- Indirect energy savings by keeping the system at its optimum performance point.
Conclusion
Not all industrial applications need solid state relays, but in those where fine, fast and stable steam control is required, their installation makes a clear difference. At Giconmes, we integrate SSRs into our electric steam generators when the project demands it, ensuring maximum efficiency, safety and reliability in demanding environments.
Do you have a process with high thermal control requirements? Contact us and we will help you design the optimal solution for your installation.