The ABB CT-ERE (1SVR550107R2100) is a high-precision electronic time relay from the CT-E range, specifically designed for ON-delay timing functions in industrial control circuits. This model provides reliable delayed switching of electrical loads, ensuring sequenced startups and preventing system overloads in automated processes.

 

Technical Specifications

 

Operational Precautions

• Potentiometer Adjustment: Use a small, insulated screwdriver to adjust the time scale; avoid applying excessive force to the rotary dial.
• Supply Voltage Stability: Ensure the input voltage stays within the 110-130V AC range to maintain timing accuracy and prevent coil burnout.
• Ambient Temperature: Install the relay in an environment within the specified operating temperature limits (-20°C to +60°C) to avoid timing drift.
• Terminal Tightening: Secure all wire connections to the screw terminals with the recommended torque to prevent intermittent contact or overheating.

 

Common Q&A

Q: Does the timing reset if power is lost? A: Yes, the CT-ERE is an ON-delay relay; if the supply voltage is interrupted, the timing resets, and the output contact returns to its original position.

Q: Can I use this for a Star-Delta motor starter? A: While it can provide a delay, ABB offers the specialized CT-SDE series specifically designed with the necessary changeover pause for Star-Delta applications.

Q: Is the time range fixed at 300 seconds? A: No, 300s is the maximum; the linear potentiometer on the front allows you to set any duration between 3 and 300 seconds.

Recommended Similar Models

1. CT-ERE 0.1s-10s: A similar ON-delay relay for short-duration timing requirements.
2. CT-ARE: An OFF-delay timing relay used for delayed de-energizing of circuits.
3. CT-MFE: A multifunction electronic relay offering various timing modes in one unit.
4. CT-VWE: A pulsed-time relay designed for generating specific signal lengths.
5. CT-EBE: A specialized “Star-Delta” timer for motor starting control.