Selec APFC147 Automatic Power Factor Controller – 12 Stage, LED Display
Selec APFC147 Automatic Power Factor Controller (8 / 12 Stage)
1-CT sensing APFC relay with zero programming, 7-segment LED display, intelligent switching algorithm, and up to 12 relay stages for capacitor bank automation.
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The Selec APFC147 is a compact, intelligent Automatic Power Factor Controller designed for 1-CT sensing applications. It offers zero-programming setup, a bright 4-digit LED display, and up to 12 switching stages for automatic capacitor bank operation. The controller provides accurate PF correction with configurable alarms and robust EMC compliance.
Key Features
1-CT sensing
Zero programming (automatic self-initialization)
4-digit LED display (7-segment)
Available in 8-stage or 12-stage variants
Intelligent switching algorithm
Supports automatic capacitor bank switching
Alarm indications: Over/Under Voltage, Under/Over Compensation, CT polarity error, Current Absent
Programmable CT primary & secondary
Auto/manual modes
TECHNICAL SPECIFICATIONS
Display Specifications
| Parameter | Details |
|---|---|
| Display Type | 7-segment LED |
| Digits | 4 digits × 1 row |
| LED Indicators | 8 + 1 + 1 |
Operational Characteristics
| Parameter | Value |
|---|---|
| Rated Input Voltage | 40–300V (L-N), 50–530V (L-L) |
| Rated Input Current | 5A AC (50 mA min, 6A max) |
| Frequency | 45–65 Hz |
| Burden | 20 mΩ |
| Accuracy (PF) | ±0.01 |
Measurement Range
| Parameter | Value |
|---|---|
| Power Factor | 0.8 Lag to 0.8 Lead |
| CT Primary | 1A–9999A (programmable) |
| CT Secondary | 1A or 5A |
Output Specifications
| Parameter | Value |
|---|---|
| Output Contacts | 1 NO, common output (max fuse 6A) |
| Steps | 1 to 8 / 12 |
| Relay Contact Rating | 5A at 250V AC |
Auxiliary Supply
| Parameter | Value |
|---|---|
| Input Voltage Range | 90–550V AC |
| Consumption | 15 VA max |
| Frequency | 50–60 Hz |
Control Specifications
| Parameter | Value |
|---|---|
| Target PF | 0.8 Lag to 0.8 Lead |
| Control Sensitivity | 60% |
| Step Time | 5–999 sec |
| Discharge Time | 5–999 sec |
| Control Mode | Auto/Manual |
| Switching Program | Automatic |
| Auto Initialization | Yes |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temp | 0°C to 60°C |
| Storage Temp | –20°C to 60°C |
| Humidity | 0–95% RH (non-condensing) |
| Mounting | Panel Mount |
| Weight | 400 g |
Compliance
IEC 61326-1
IEC 61000-4-2 (ESD)
IEC 61000-4-4 (EFT)
IEC 61000-4-5 (Surge)
CISPR-11 (Conducted & Radiated Emission)
IEC 61000-4-3 (Radiated Susceptibility)
IEC 61000-4-6 (Conducted Susceptibility)
IEC 61000-4-8 (Magnetic Field Immunity)
APPLICATIONS
Automatic PF correction panels
Commercial and industrial capacitor banks
Motor loads, HVAC systems, compressors
Power distribution panels
Utility and plant power quality improvement
WHAT’S IN THE BOX
APFC147 controller
Terminal label sheet
Mounting clamps
User manual
FAQ
Q1. How many stages does APFC147 support?
8 or 12 stages depending on the model.
Q2. Does it require 3 CTs?
No—APFC147 works on 1-CT sensing.
Q3. What is the target PF range?
0.8 lag to 0.8 lead.
Q4. Does it support auto-learning?
Yes—automatic initialization and intelligent switching algorithm.
Q5. Can it be used in APFC panels with mixed kVAR steps?
Yes, it automatically adjusts step logic.
Q6. Does it support manual override?
Yes, Auto and Manual modes are available.