The SubTronicSC® range covers all PSC motors from 0.25 kW to 2.2 kW for all voltages. Ergonomic design, attention to detail and unique features make the SubTronicSC® motor starter range your first choice when considering submersible motor protection. In conjunction with Franklin Electric submersible motors you now have a tangible water system advantage resulting in ease of installation and reliable protection.
- Attention to detail – every aspect engineered for the application
- The complete package – the device is 100 % compatible with the motor characteristics
- All in one name – reliability backed by the leader in submersible motors
- Mounting: easy wall mounting offering various options without destroying the protection rating of the enclosure.
- Wiring: reliable connectors are provided for ease of wiring.
Motor compatible design
- Matching range: the SubTronicSC® protector range was designed to match the Franklin Electric range of PSC motors.
- Wide range of operation: compatibility with motor design allows for a wide range of operation resulting in minimized nuisance tripping.
Intelligent Protection and Management Features:
- Dry-run detection (without probes): prevents motor and pump damage due to running the pump without water based on a proprietary reliable detection method.
- Dry-run auto-reset: dry-run reset time is based on a proprietary search algorithm to find the best operating point for weak wells. Reset time 6 to 60 minutes.
- Over & under voltage: prevents motor damage that may be caused by abnormal voltage conditions without limiting the range of operation, made possible by matching the design of the SubTronicSC® Protector with the motor. Reset time approximately 3 minutes.
- Over current protection: prevents operation under conditions where motor current may exceed safe levels due to bound pump or other fault condition. Detection is based on current heating capacity measurement to prevent unnecessary nuisance tripping. Reset time approximately 10 minutes.
- Faulty start protection: prevents system damage due to factors such as faulty contacts or switch. Contact failure detection reacts fast and will prevent damage to system components
- Rapid cycle protection: prevents system damage due to factors such as continuous rapid cycling and excessive motor thermal cycling caused by waterlogged tank, faulty contacts or faulty pressure switch.
- Status: indication shows normal operation or other condition.
- Voltage: faulty voltage condition is indicated.
- Fault conditions: dry-run, over current, rapid cycling, and faulty start are indicated
- Protection level: IP54
- External dimensions: 290 x 230 x 95 mm
- Weight: 0.6 - 1.0 kg
- Mounting: Wall mounting (with options)
- Temperature: -5 °C - +40 °C
- Humidity: 50 % at 55 °C (without condensation)
- Voltage: 220 - 240 V; ± 10 %; 50 Hz 1-phase
- Current: 16 A
- Power: 0.25 - 2.2 kW
- IEC 60439-1 when supplied with suitably fused supply
SubTronic SC Motor Protection Specifications
Part Number Type Motor Rating
Maximal Expected Current
450 V ac
284 623 3511 ST025PSC 0.25 2.4 9.4 12.5 284 624 3511 ST037PSC 0.37 3.3 12.6 16 284 625 3511 ST055PSC 0.55 4.3 17.7 20 284 626 3511 ST075PSC 0.75 5.7 22.7 35 284 627 3511 ST110PSC 1.1 8.4 33.9 40 284 628 3511 ST150PSC 1.5 10.7 41.7 50 284 629 3511 ST220PSC 2.2 14.7 61.8 70