Sri DIGITEK® Dual Pumps Sequential Standby & Cyclic Switcher
The ULDX-DR-DM-SQ is a unique dual pump controller and panel driver engineered for twin submersible pump configurations (Main Pump with Standby Pump). It operates two pumps in a cyclic mode where pump selection changes alternatively each time the pumps switch ON and OFF, balancing wear and tear and ensuring continuous reliability. Available in both Single Phase and Three Phase supply variants.
⚙️ Key Features & Engineered Advantages
Cyclic Standby Switching
Operates two pumps in an alternating cyclic format—pump selection switches automatically each time the system cycles ON and OFF to equalize engine wear.
3-Position Pump Selector Switch
Features an explicit rocker selector for Auto, Pump 1, or Pump 2. In Auto, both operate cyclically; selecting Pump 1 or Pump 2 locks execution to that unit while keeping the other idle.
Extra Water Storage Logic
When the sump tank reaches 100%, it activates pumping to top up the overhead tank (if above 50%), simultaneously expanding reserve capacity in the sump.
Polarization-Free AC Sensing
Software-driven low AC pulse sensing with stainless steel plastic-molded conductive electrodes prevents scaling and requires zero frequent maintenance.
Dry-Run & Voltage Defense
Includes dry-run protection with a 120s delay, built-in surge protection, and wide voltage cut-off bounds (<170V / >270V AC for Single Phase; 360V–480V for Three Phase variants).
Independent Pump Bypass Rockers
Equipped with optional independent rocker switches for each pump to bypass control operations during servicing without complete system un-wiring.
📋 Technical Specifications
| Model Code | ULDX-DR-DM-SQ (Dual Pumps Sequential Standby Switcher) |
|---|---|
| Manufacturer | Smart Care Systems |
| Power Supply Input | Configurable Options: 230V AC 50Hz (Single Phase) or 360V - 480V AC (Three Phase variants) |
| Working Voltage Limits | >170V & <270V AC (Single Phase) / 360V - 480V AC (Three Phase) |
| Relay Contact Ratings | Pump 1: 30 & 30 Amps | Pump 2: 30 & 30 Amps |
| System Delays | Power Delay: 60 Seconds | Dry-Run Delay: 120 Seconds |
| Power Consumption | 1.1 W |
| Dimensions (W x H x D) | 160 x 180 x 65 mm |
| Max Sensor Cable | 300 meters |
🏡 Ideal Applications
Twin Submersible Setup
Perfect for residential or commercial buildings utilizing a primary and secondary standby pump configuration.
High-Demand Apartments
Evenly distributes running hours across dual alternating motors to maximize aggregate service life.
Single & Three Phase Sites
Adaptable for installations running on either domestic single-phase lines or heavy-duty three-phase power grids.