RVS-AX Analogue Soft Starter

Analogue Soft Starter 8-170A, 220-600V with a built-in bypass

For small to medium size motors, in demanding applications, the RVS-AX provides an optimal solution. Ease of installation and operation and incorporating Current Limit and Motor Protection, makes the RVS-AX an ideal cost effective replacement for Star-Delta and Auto-Transformer starters.

Advantages at a glance

• Reduced inrush current & mechanical shock
• Soft, smooth, stepless acceleration and deceleration
• Incorporating motor protection
• Maintenance free, all solid state, incorporating a bypass (31-170A)
• Compact, small footprint, book type, light weight - all aluminum case
• Easily installed and operated.
• Conservative SCR selection, heatsink and bypass system designed for starting at 350% In for 20 sec. at 40oC ambient temperature, ensures reliable operation.
• Superior construction - IP20 up to 58A. Enclosed front panel for increased safety at higher ratings.

Start Stop Parameters

Potentionmeter settings for:

• Motor Full Load Current (FLC)
• Initial Voltage
• Current Limit
• Ramp-Up
• Ramp-Down

Motor & Starter Protection

• Electronic Overload - Inverse time Electronic Overload. Operational at end of acceleration process
• Phase Loss - Operational when starter is energized and protects motor from single phasing. Trips the starter when one or two phases are missing for more than 1 sec.
• Heatsink Over Temperature Protection - A thermal sensor mounted on the heatsink trips the starter when the temperature rises above 85oC.
• Fault logic, Trip and Reset circuits. When a protection operates, the starter locks in fault mode, disabling thyristor firing, the LED indicates the fault, and the Trip contact closes.

Displays (LEDs)

• On - mains voltage connected
• Ramp Up / Down
• Run
• Overload
• Phase Loss
• Over Temperatre

Auxiliary Relays

• End of Acceleration Relay, one-N.O contact
• Fault Relay, one-N.O contact

Typical Applications

• Pumps
• Fans
• Compressors
• Conveyors and monorail systems
• Weak power source starting (diesel generators, long cables, etc).