The time the unit waits before switching steps (usually 10–60 seconds) to allow capacitors to discharge safely.
This device is designed to automatically switch capacitor stages to correct the power factor—for which some energy utilities may charge a penalty—making it an important tool for managing electrical system efficiency. The Computer 8d series is known for its reliability and advanced features for its time.
: If your CT is 400/5A, select a transformer ratio value of 80 ( 2. Target Cosine Phi ( Define the desired power factor for the installation.
Understanding the technical limits ensures safe installation and reliable operation. Specification 230V AC or 400V AC (model dependent), +/- 10% Current Input CT (Current Transformer) ratio selection, secondary .../5A Frequency 45 Hz to 65 Hz Output Relays 8 output steps Relay Contact Rating 4A / 250V AC Display LED, 3 digits, 7 segments Protection Rating IP54 (front panel), IP31 (rear panel) Standard Dimensions 96 x 96 mm (panel cutout) Installation and Wiring
: The mandatory discharge wait time before a disconnected capacitor can safely re-energize (default: ≥50is greater than or equal to 50 circutor computer 8d96 manual full
Ensure you are using the specific manual for the 8d96 model, as settings differ slightly from the 6-step (6d96) or 12-step (14d96) versions. Conclusion
: The Current Transformer is installed on the wrong phase or installed backwards.
Ensure the CT ratio matches the load profile. Check for severe system overloads. Overvoltage on measurement inputs.
Connect to the control coils of the capacitor switching contactors. The time the unit waits before switching steps
Incorrect wiring causes faulty power factor readings and can damage the controller. Always isolate the electrical panel before starting.
What is the rating of your and your smallest capacitor step (in kvar) ?
If the "C" (Capacitive) indicator is lit, you have too many capacitors online for the current load.
Never open-circuit the secondary terminals of a Current Transformer while the primary circuit is live. This causes extremely high voltages that can destroy equipment and cause severe injury. Always short-circuit the CT secondary before disconnecting measurement wires. Programming and Configuration : If your CT is 400/5A, select a
: Connect to terminals 1 (0 V), 2 (230 V), or 3 (400 V) depending on your grid voltage.
The is a robust, microprocessor-controlled power factor regulator designed to automate reactive power compensation in electrical installations. By measuring system phase shifts and executing optimized switching algorithms, it maintains the target
represents the reactive current output of your smallest capacitor step.
: Modifies programming numbers and scrolls through screens. Setup and Programming Code