Frequency Converter

Static (solid state) frequency converters convert AC electrical power of one frequency into AC electrical power of another frequency. To realize high efficiency, great manageability and energy saving in industrial induction motor related applications, it is necessary to adopt controllable frequency converter systems.

The power conversion process isolates the critical load from the normal mains disturbances and isolates the mains from load induced reflected harmonics affecting other loads connected to the input mains feeder. The rectifier converts AC power into DC to provide the necessary DC for continuously rated capacity of the inverter. IGBT semiconductor modules are used in PWM inverter and the control logic creates the precise sinusoidal output waveform with a very low harmonic content. Thyristor semiconductor modules are also used in rectifier for reliable operation.

The system consists of rectifier, inverter, output isolation transforme, controls and monitoring. The AC output of the inverter is connected to the critical load.

GENERAL
Model	FK Series
Topology	Double Conversion Online System
Control	Microprocessor Controlled System

GENERAL

Model

FK Series

Topology

Double Conversion Online System

Control

Microprocessor Controlled System

RECTIFIER
Topology	Full Bridge Phase Angle Controlled Thyristor Module Rectifier
Control	Microprocessor Controlled System
Nominal Input Voltage	110 VAC / 220 VAC / 230 VAC / 240 VAC / 380 VAC / 400 VAC / 415 VAC / 480 VAC ±15%
Nominal Input Frequency	50 hz. ±5% or 60 hz. ±5%
Input Cosφ	≥ 0.8 Inductive
Nominal DC Voltage	110 VDC / 125 VDC / 144 VDC / 220 VDC / 264 VDC / 360 VDC
Static Tolerance	<1%
Output Voltage Ripple RMS	<1% (at full load)
Protections	Thermic‐Magnetic Over Current Protection, Over Voltage Protection, EMI‐RFI Filter

RECTIFIER

Topology

Full Bridge Phase Angle Controlled Thyristor Module Rectifier

Control

Microprocessor Controlled System

Nominal Input Voltage

110 VAC / 220 VAC / 230 VAC / 240 VAC / 380 VAC / 400 VAC / 415 VAC / 480 VAC ±15%

Nominal Input Frequency

50 hz. ±5% or 60 hz. ±5%

Input Cosφ

≥ 0.8 Inductive

Nominal DC Voltage

110 VDC / 125 VDC / 144 VDC / 220 VDC / 264 VDC / 360 VDC

Static Tolerance

<1%

Output Voltage Ripple RMS

<1% (at full load)

Protections

Thermic‐Magnetic Over Current Protection, Over Voltage Protection, EMI‐RFI Filter

INVERTER
Topology	3 Full Bridge 6 high Frequency IGBT Inverter Modules (3 Phase); 1 Full Bridge 2 high Frequency IGBT Inverter Modules (1 Phase)
Isolation Transformer	Galvanically Isolated (standard)
Power Factor	0.8
Nominal Input Voltage	110 VDC / 125 VDC / 144 VDC / 220 VDC / 264 VDC / 360 VDC +/-15%
Nominal Output Voltage	110 VAC / 220 VAC / 230 VAC / 240 VAC / 380 VAC / 400 VAC / 415 VAC / 480 VAC
Voltage Tolerance
static	± 1%
dynamic with 100% load change	± 10% in 50 msec.
Overload
at 125% Load	10 minutes
at 150% Load	1 minute
Waveform	Pure Sinusoidal
Total harmonic Distortion (ThDv)
at Linear Load	< 3%
at Non-Linear Load	< 8%
Crest Factor	3 : 1 (at full load)
Nominal Output Frequency	50Hz or 60Hz
Short-circuit behaviour:	3 x Nominal Output Current
Protection	Short Circuit, Over Current, Over Voltage and Over Heat Electronic Protection

INVERTER

Topology

3 Full Bridge 6 high Frequency IGBT Inverter Modules (3 Phase); 1 Full Bridge 2 high Frequency IGBT Inverter Modules (1 Phase)

Isolation Transformer

Galvanically Isolated (standard)

Power Factor

0.8

Nominal Input Voltage

110 VDC / 125 VDC / 144 VDC / 220 VDC / 264 VDC / 360 VDC +/-15%

Nominal Output Voltage

110 VAC / 220 VAC / 230 VAC / 240 VAC / 380 VAC / 400 VAC / 415 VAC / 480 VAC

Voltage Tolerance

static

± 1%

dynamic with 100% load change

± 10% in 50 msec.

Overload

at 125% Load

10 minutes

at 150% Load

1 minute

Waveform

Pure Sinusoidal

Total harmonic Distortion (ThDv)

at Linear Load

< 3%

at Non-Linear Load

< 8%

Crest Factor

3 : 1 (at full load)

Nominal Output Frequency

50Hz or 60Hz

Short-circuit behaviour:

3 x Nominal Output Current

Protection

Short Circuit, Over Current, Over Voltage and Over Heat Electronic Protection

LCD FRONT PANEL
Indicators and Buttons	2 x 16 LCD Panel, Menu Selection and Parameter Setting Buttons
Warning Messages	Input Fuse/DC Voltage High‐Low /Over Load/Device Over Heat/Inverter Over Heat /Inverter SCR Fuse/Output Low‐High
Monitoring	Output Voltage/Output Frequency/Inverter Load Percentage/DC Bus Voltage/ Device Temperature / Event History
Adjustable Parameters	DC Bus Cut‐off Voltage /Output Voltage/Date/Time /Alarm ON‐OFF / Communication Address Value
Sound Alarm	On Warning Messages 2 Short ‘beep’ per 2 seconds
Communication	Events are displayed on time base. Last 256 events recorded and displayed on front panel and on PC via RS 282 and RS 485

LCD FRONT PANEL

Indicators and Buttons

2 x 16 LCD Panel, Menu Selection and Parameter Setting Buttons

Warning Messages

Input Fuse/DC Voltage High‐Low /Over Load/Device Over Heat/Inverter Over Heat /Inverter SCR Fuse/Output Low‐High

Monitoring

Output Voltage/Output Frequency/Inverter Load Percentage/DC Bus Voltage/ Device Temperature / Event History

Adjustable Parameters

DC Bus Cut‐off Voltage /Output Voltage/Date/Time /Alarm ON‐OFF / Communication Address Value

Sound Alarm

On Warning Messages 2 Short ‘beep’ per 2 seconds

Communication

Events are displayed on time base. Last 256 events recorded and displayed on front panel and on PC via RS 282 and RS 485

SAFETY & ENVIRONMENT
Over Voltage Protection	IEEE 587 4500 A, 110 Joules (standard) / 40kA Surge Arrestor (OPTIONAL)
Electrical Interference Reduction	FCC Part 15 Class B
Electrical Standards	EN 50091-1 (Security) / EN 50091-2 (EMC)
Protection Level / Color	IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult)
MTBF	100,000 hrs.
Enclosure Material	Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness
Cooling	Forced Fan (Standard) / Natural (OPTIONAL)
Cable Entry	Bottom (Standard) / Top (OPTIONAL)
Operating Temperature	-10 / +40 °C. (Higher operating temperatures are available, please consult)
Relative humidity	5 – 90 %
Operating Altitude	Max. 1000 Mt. (Higher altitudes requires de-rating, please consult )
Noise Level	Max. 60 db

SAFETY & ENVIRONMENT

Over Voltage Protection

IEEE 587 4500 A, 110 Joules (standard) / 40kA Surge Arrestor (OPTIONAL)

Electrical Interference Reduction

FCC Part 15 Class B

Electrical Standards

EN 50091-1 (Security) / EN 50091-2 (EMC)

Protection Level / Color

IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult)

MTBF

100,000 hrs.

Enclosure Material

Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness

Cooling

Forced Fan (Standard) / Natural (OPTIONAL)

Cable Entry

Bottom (Standard) / Top (OPTIONAL)

Operating Temperature

-10 / +40 °C. (Higher operating temperatures are available, please consult)

Relative humidity

5 – 90 %

Operating Altitude

Max. 1000 Mt. (Higher altitudes requires de-rating, please consult )

Noise Level

Max. 60 db

Frequency Converter

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