Isolation & Special-Duty Transformers
AFT Single-Phase Audio Isolation Power Conditioner
Every appliance sharing your circuit — a refrigerator compressor cycling on, a dimmer switch, a hair dryer down the hall — throws high-frequency noise and surge spikes back onto the same wiring your audio system draws power from. The AFT series is a complete, ready-to-plug isolation power conditioner built to filter that noise out before it reaches your gear: a built-in filter capacitor strips high-frequency parasitic interference and surge impulses, six-fold protection (over-voltage, under-voltage, overload, over-temperature, delay, and short-circuit) keeps the unit itself safe under fault conditions, and an internal toroidal transformer wound on grain-oriented silicon steel delivers the clean, isolated output at full rated power. Unlike a bare transformer component, AFT ships in its own chassis with a smart LCD display reading input current and output voltage at a glance, a rated circuit breaker, and a one-touch start switch — plug it in between the wall and your amplifier, and it’s already doing the job. Compliant with GB/T 9646-1999, the range runs from a 500VA unit for a modest system to 2000VA for larger setups.
Key Features
A Complete, Ready-to-Plug Power Conditioner
AFT combines noise filtering, isolation, and monitoring in a single enclosure, rather than requiring a separate transformer to be built into your own chassis.
Built-In Noise Filtering
A filter capacitor strips high-frequency parasitic interference and surge impulses from nearby motor-driven and switching appliances.
Six-Fold Protection Suite
Over-voltage, under-voltage, overload, over-temperature, delay, and short-circuit protection built in.
True-Rated Toroidal Core
Internal toroidal transformer wound on grain-oriented silicon steel for high efficiency, low loss, and low leakage flux.
Smart LCD Display
Input current and output voltage displayed clearly, with load ratio visible at a glance.
Rated Breaker, One-Touch Start
A rated circuit breaker trips automatically above its rated current, paired with a one-touch start switch.
GB/T 9646-1999 Compliant
Built to the national standard for isolation transformers, spanning 500-2000VA.
OEM & ODM Capabilities
Built-to-Order for B2B and System Integrators
Capacity, chassis finish, and display configuration are adapted for private-label audio and electronics distribution.
Configurable Capacity
Standard range 500-2000VA, with smaller or larger custom builds available on request.
Chassis & Branding Customization
Enclosure finish, front-panel layout, and labeling configurable for private-label distribution.
Adjustable Protection Thresholds
Over-voltage, overload, and delay-protection setpoints tuned to project requirements.
Input/Output Voltage Customization
Voltage configuration adapted beyond the standard 220V/220V build for other regional supply voltages.
Application-Specific Configuration
Sized and configured for home audio, studio, or light-commercial power-conditioning use.
Small-to-Large Batch Production
From prototype quantities to volume production runs for audio-equipment distributors.
Technical Specifications
Electrical tolerances and protection ratings are shared across the AFT series; capacity, current, and dimensions scale by model.
| Product Name | AFT Series Single-Phase Isolation Transformer |
|---|---|
| Applicable Standard | GB/T 9646-1999 |
| Phase | Single-phase |
| Short-Circuit Impedance | 4% |
| Insulation Class | F |
| Overload Capacity | 2× rated current, sustained 60 seconds |
| Dielectric Strength | 1500V, no breakdown within 1 minute |
| Ambient Temperature | -25°C to 45°C |
| Noise | ≤65dB (at 1 meter) |
| Temperature Rise | ≤75K (transformer body and output terminals) |
| Cooling Method | Self-cooling |
| Terminal Block | Clearly labeled terminal block |
| Protection Rating | IP20 |
| Factory Testing | Per national standard and technical agreement |
| Dielectric | 1500V/1min |
|---|---|
| Overload | 2× / 60s |
| Capacity | 500-2000VA |
| Noise | ≤65dB |
| Model | Rated Capacity | Rated Voltage | Rated Output Current | Frequency | Dimensions (L×W×H) |
|---|---|---|---|---|---|
| AFT-500VA | 500VA | 220V/220V | 2.27A | 50Hz/60Hz | 290×180×140mm |
| AFT-1000VA | 1000VA | 220V/220V | 4.5A | 50Hz/60Hz | 290×180×140mm |
| AFT-2000VA | 2000VA | 220V/220V | 9A | 50Hz/60Hz | 320×210×200mm |
Construction & Configuration
A filter stage, toroidal transformer, and protection circuit sit inside a compact chassis with front-panel monitoring and control.
Filter Capacitor Stage
Strips high-frequency parasitic interference and surge impulses from the incoming supply before the transformer stage.
Toroidal Transformer Core
Grain-oriented silicon steel core wound for high efficiency, low core loss, and low magnetic leakage.
Six-Fold Protection Circuit
Over-voltage, under-voltage, overload, over-temperature, delay, and short-circuit protection built into a single circuit board.
Smart LCD Display Panel
Front-panel screen reads input current and output voltage with a visual load-ratio indicator.
Rated Circuit Breaker
A rated circuit breaker on the front panel trips automatically above its rated current to protect connected equipment.
One-Touch Start Switch & Chassis
Compact steel chassis with a one-touch start button and a labeled terminal block for straightforward setup.
Standards & Test Documentation
AFT is built to GB/T 9646-1999 and tested for dielectric withstand on every unit; further documentation is available for procurement review.
GB/T 9646-1999
Built to the national standard governing isolation transformer design and testing.
Dielectric Withstand Test
Every unit is tested at 1500V for one minute with no breakdown.
Datasheets & Test Reports
Full parameter sheets and factory test documentation available on request for procurement review.
Want a Cleaner Power Feed for Your Audio System?
Tell us your system's power draw and setup — we'll configure an AFT unit or another series to match.