| Attribute | Value |
|---|---|
| Brand | CARLO GAVAZZI |
| Product Type | 3-Phase Sequence Voltage Relay |
| Model | SM 170 440 |
| Voltage Range | 260/440V~ 50/60Hz |
| Power Consumption | ~3VA 45-65Hz |
| Wiring | —2W |
| AC1 Rating | 10A, 250V~ |
| AC15 Rating | 2.5A, 230V~ |
| DC1 Rating | 1A, 250V— |
| DC13 Rating | 5A, 24V— |
| Part Number | 574722 |
| Ingress Protection | IP20 |
| Base | S411 |
| Output Ratings | 10A/400V~ | 10A/300V~ |
| Weight | 280 gm |
| Condition | Used – 1 pcs |
| Reference No | 54702 |
What Is the Carlo Gavazzi SM 170 440?
The Carlo Gavazzi SM 170 440 is a sequence voltage relay for 3-phase applications. Simply put, it is a protective relay that checks the phase sequence and phase presence of a 3-phase power supply. These values are essential to the running of motors, pumps, and other 3-phase equipment.
This model works within a voltage level that qualifies it for 440V systems, and features a 250V base, thus being flexible in various electrical configurations.
Key Features and Specifications
Some of the best features of the SM 170 440 are as follows:
Phase Sequence Monitoring: This is used to verify that the three phases are wired in the proper sequence. Reverse phase sequence can lead to motors operating in reverse, thus causing equipment to be destroyed.
Phase Failure Detection: Determines whether one or more phases are absent or undervoltage and initiates a response to avoid equipment damage.
Compact DIN-rail Mount Design: Simple installation in control panels or distribution boards.
LED Indicators: Visible indication of the operational status of the phases.
Wide Voltage Range: Supports up to 440V with a base of 250V, ideal for wide industrial applications.
Accurate Brand: Produced by Carlo Gavazzi, recognized for their quality and reliable industrial automation parts.
Why Phase Sequence and Monitoring are Important
Faulty phase sequence or absent phases may cause major destruction in 3-phase systems. For instance:
- Motors can rotate in a reverse direction.
- Equipment may overheat or unexpectedly fail.
- Control systems may trip or provide erroneous readings.
The SM 170 440 relay prevents these problems by monitoring the system all the time and disconnecting the load if there is any anomaly.
Applications of the Carlo Gavazzi SM 170 440
The relay is widely applied in various industries, such as:
Industrial Automation: Provides safe motor operation in automated systems.
HVAC Systems: Shields compressors and fans in heating and cooling systems.
Water Treatment Plants: Shields pumps from damage caused by power irregularities.
Factory Factories: Keeps machinery on assembly lines running continuously.
Facilities Management Systems: Protects commercial building electrical infrastructure.
