STPS4

3*400 V transformer fan speed controller with PTC

The STPS4 transformer speed controllers are based on the principle of voltage control with auto-transformers. They are applicable to voltage-controllable motors (400 V, 50/60 Hz) with built-in PTC sensors, to control the rotational speed (EX Motors in fans, pumps, etc.) in 5 steps. They are fitted out with thermistor protection units for use with these PTC thermistor probes for thermal motor protection.

• 400 Vac (50/60Hz) - from 1,5 up to 11 A
• Switch: 5 positions with Off-position
• Several voltage ranges are possible
• 230 Vac unregulated output
• Motor protection from overheating, by use of PTC protection relay, up to 6
• PTC probes in series
• Indicator light
• Additional alarm indication (optional)
• Short-circuit detection
• After overheating manual reset by turning the switch to zero position

datasheetmounting instructionsdeclaration of conformity