Selec APFC347 Automatic Power Factor Controller
Selec APFC347 Power Factor Controller, 8 Stage, 1-CT Sensing
Advanced APFC controller with 8 relay stages, 1-CT sensing, auto initialization, and intelligent capacitor bank switching for industrial PF correction.
The Selec APFC347 is an 8-stage automatic power factor controller designed for capacitor bank switching in industrial and commercial power systems. It features 1-CT sensing, automatic initialization, intelligent switching algorithms, and comprehensive alarm indications for efficient PF correction.
KEY FEATURES
1-CT sensing for simplified wiring and accurate PF measurement.
8 relay stages for automatic capacitor bank switching.
Zero Programming—auto initialization ensures easy commissioning.
4-digit LED display for PF, alarms, and operational data.
Wide input voltage range: 85–270 VAC.
Target PF adjustable from 0.8 lag to 0.8 lead.
Programmable CT primary (1–9999 A) and CT secondary (1 A / 5 A).
Multiple alarm indications: Over/Under Voltage, Under/Over Compensation, CT polarity error, Current absent, etc.
Panel mount 96×96 design with robust EMI/EMC compliance.
Relay contact rating: 5A at 250 VAC.
TECHNICAL SPECIFICATIONS
| Parameter | Specification |
|---|---|
| Display | 4-digit, 7-segment LED |
| Sensing | 1-CT |
| Input Voltage | 40–300V (L-N), 50–520V (L-L) |
| Input Current | 5A AC (Min 50mA, Max 6A) |
| Frequency | 45–65 Hz |
| Accuracy | PF ±0.01 |
| Measurement Range | 0.8 lag to 0.8 lead |
| CT Primary | 1–9999A (programmable) |
| CT Secondary | 1A or 5A (programmable) |
| Steps | 3 to 8 relay outputs |
| Relay Rating | 5A @ 250VAC |
| Step Time | 5–999 seconds |
| Discharge Time | 5–999 seconds |
| Control Mode | Automatic / Manual |
| Auto Initialization | Yes |
| Alarms | OV, UV, Under/Over compensate, CT error, Current absent |
| Supply Voltage | 85–270 VAC |
| Consumption | 7 VA max |
| Operating Temp | 0°C to 60°C |
| Mounting | Panel, 96×96 mm |
| Weight | 263 g |
APPLICATIONS
APFC Panels
Industrial capacitor banks
Manufacturing plants
Commercial LV distribution systems
DG synchronization systems
HVAC systems
Any load requiring PF improvement
WHAT’S IN THE BOX?
Selec APFC347 Controller
Mounting clamps
User Manual
Warranty card
FAQ
1) Is external CT required?
Yes, APFC347 works with a single external CT (1A or 5A).
2) Can this controller handle 8 capacitor stages?
Yes, it supports 3 to 8 relay steps.
3) Does it auto-detect capacitor values?
Yes, the unit supports auto initialization for quick setup.
4) Can it operate on a 110V supply?
Yes, the auxiliary supply range is 85–270 VAC, covering 110 110V/230V systems.
5) What wiring method is recommended?
L-L or L-N sensing with proper CT polarity as per the wiring diagram.