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400V APF Industrial Complete Cabinet
- Product Description
- Features & Advantages
- Technical Parameters
- Related manuals
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400V APF Industrial Complete Cabinet
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- Commodity name: 400V APF Industrial Complete Cabinet
- Commodity ID: 1362032819378475008
- 类型: Power distribution/switching
- 品牌: Capni
Brand: Zhiyuan New Energy Description: The entire cabinet adopts a bottom-in, top-out airflow configuration. An axial fan is installed at the top of the cabinet to extract air, while dust-proof louvers are positioned at the bottom to allow fresh air intake. This design effectively isolates the internal environment from external conditions, making it particularly suitable for high-temperature industrial environments ranging from 40°C to 55°C and for applications in harsh environments with heavy dust accumulation.
1. Introduction
The industrial active power filter (APF for short) is a new type of specialized equipment designed for power harmonic mitigation, manufactured using modern power electronics technology and digital signal processing technology based on high-speed DSP devices.
It consists of two main components: a reference current computation circuit and a compensation current generation circuit. By means of external current transformers, the circuit detects in real time the harmonic currents and reactive currents at various orders in the power grid, thereby obtaining the reference currents. The reference current computation circuit continuously monitors the currents flowing in the power lines, converts the analog current signals into digital signals, and sends these digital signals to a high-speed digital signal processor (DSP) for further processing. The DSP separates the harmonics from the fundamental wave and then outputs drive pulses in the form of pulse-width modulation (PWM) signals to the compensation current generation circuit. These pulses drive IGBT or IPM power modules, generating a compensation current that is equal in magnitude to the harmonic currents in the power grid but opposite in polarity. This compensation current is injected back into the power grid, effectively compensating for or canceling out the harmonic currents and actively eliminating power harmonics.
2. Basic Components
The APF system mainly consists of the main contactor KM1, the pre-charge contactor KM2, the pre-charge resistor R, the filtering inductor L, the voltage-source PWM rectifier bridge (VSR), and the DC bus capacitor C, among other components.
The system diagram is shown in Figure 1. Resistor R serves as the pre-charge resistor for the system. Once KM2 closes, the voltage across the system bus capacitor begins to charge slowly. KM1 controls the main circuit and simultaneously shorts the pre-charge resistor R. The inductor acts as a power-transfer interface between the power converter and the power system; on one hand, it stores energy, and on the other hand, it filters out high-frequency switching ripple currents. The voltage-source PWM rectifier bridge, which is the power conversion component of the APF, is composed of insulated-gate bipolar transistors (IGBTs). It employs space-vector pulse-width modulation (SVPWM) technology to drive the IGBTs and generate the compensation current waveform. The DC capacitor module stores the DC energy generated by the IGBT power conversion module.
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Characteristics of industrial products
Design concept
Ø The industrial-grade APF is a product specially developed by our company for industrial application environments, featuring a vertical structure design for its active module. This structural design employs high-capacity IGBT power devices, with device ratings exceeding three times the effective value, ensuring ample safety margins and enabling long-term operation even under significant load surges. The module utilizes axial-flow fans for heat dissipation, providing large airflow, sufficient air pressure, and excellent cooling performance. The entire cabinet adopts a bottom-in, top-out airflow configuration: an axial-flow fan at the top of the cabinet extracts air, while dust-proof louvers at the bottom allow fresh air to enter. This design effectively isolates the internal components from the external environment, making it particularly suitable for high-temperature industrial sites and harsh environments—especially those with high dust concentrations. Examples include powder plants, stone-processing plants, tile factories, cement plants, and similar facilities.
Anti-high-voltage distortion
Ø Suitable for industrial load distribution systems with harmonic voltage distortion rates ranging from 5% to 25%, featuring a subtle-level instantaneous response speed and a total response time of less than 10 ms.
Comprehensive compensation, safety and stability
Ø Harmonic mitigation, inductive and capacitive reactive power compensation—freely select the compensation combination.
Ø Automatic current-limiting operation and comprehensive fault protection features.
Advanced control strategies and topological structure design
Ø It employs an LCL topology filter that, even when harmonic currents are present at the output, does not introduce high-frequency harmonic interference from IGBT switching. Moreover, it is suitable for any on-site grid system impedance and will not cause resonance.
Self-diagnosis and self-startup function for faults
Ø The device features a self-recovery function that allows it to resume operation automatically after a shutdown caused by factors unrelated to the device itself. Before initiating self-recovery, the device will perform an automatic diagnosis of both the external power grid and the device itself; only if the diagnosis is successful can the device restart automatically. If the issue lies with the external power grid, the device will no longer attempt to start up and will transmit a device failure alarm to the host computer, while also illuminating its own fault indicator light.
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Input
System voltage ( V )
400V AC
System voltage range
± 10%
Frequency (Hz)
50/60 ±5%
Output and Installation Method
Rated current ( A )
Music video
CV
100A, 125A, 150A
100A, 125A, 150A, 200A ，
300A, 400A, 450 ,550A,600A
Type
Industrial-grade module
Complete cabinet
Incoming line method
Upstream line
Upstream line / Bottom incoming line / Busbar running through the cabinet top
(The cable entry method for the enclosure must be specified in the contract.)
Performance metrics
Filter rate
≥ 90% ( Within the ordered capacity range, and with harmonic content of the load exceeding the ordered capacity. 30%)
Filtering range
2 to 25 Subharmonics (if you need to address even-order harmonics, please specify when placing your order)
Full response time
≤ 10ms
Instant response time
≤ 100us
Dynamic current
1.2 Rated capacity output of the dual-filter, 1min
Power factor setting compensation
Be equipped with
Inductive or capacitive compensation
Optional
Protection
Overload protection
Automatic rate limiting in 100% Rated output
Other protections
Overvoltage protection, undervoltage protection, overtemperature protection
Operating mode
Single-unit or parallel operation
Okay.
Display and Operation
Display interface
7 Inch touchscreen
Display status
Current, voltage, power, harmonic distortion rate, and more
Operation
Multiple operation mode options, remote or local.
Communication ( RS485 Interface)
Modbus-RTU It features a remote monitoring interface and a backend database, enabling users to conveniently monitor various operating parameters of the device from internet-connected terminals.
Phase Sequence Adaptive
Be equipped with
Environmental conditions
Protection level
IP20 (Customizable)
Operating ambient temperature
-10 Celsius ~40 Celsius
Storage / Transportation temperature
-40 Celsius ~60 Celsius
Work / Storage humidity
Relative humidity 20~95% No condensation. / Relative humidity 10~95%
Altitude
1000m The following (derating required for higher altitudes)
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