Transformer three-phase speed controllers RSA5D-…-M -official VENTS website

Description

APPLICATIONS	DESIGN AND CONTROL
RSA5D-…M series speed controllers are applied for air capacity control of three-phase fans by means of step control of motor speed. The controllers have five speeds. Speed is set by means of rotating the control knob at the casing front panel to one of five available fixed positions. Several fans can be controlled synchronously in case their total consumption current does not exceed the maximum permissible value of the controller current.	The controller casing is made of flame-retardant thermoplastic. The controller has five speeds with the output power 130 V – 180 V – 230 V – 300 V – 400 V and incorporates control speed knob, light indication for operation. The controller has built-in motor overheating protection which cuts power supply in case of exceeding the set temperature threshold. After the temperature drops to the operating level the motor restarts. As an additional function, the controller has terminals (230 V, max. 2 A) for connecting external equipment (e.g. air damper actuators).
MOUNTING
The controller is designed for indoor mounting. Installation shall be performed with respect to the free air recirculation for inner circuit cooling. The controller is for vertical installation. Do not install the controller above the heaters and in bad air convection areas.

Device operating position

Three phase speed controller VENTS RSA5D-…-M