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Chapter: H.1. Conditions of safe operations

H.1. Conditions of safe operations

Before starting any work with the MFC1000 frequency converter read carefully this User manual. 

This User manual contains notices intended to ensure personal safety, as well as to protect the MFC1000

frequency converter and connected equipment against damage. 

Ignorance or not knowing of the information contained in It can cause physical injury or death!

It can also cause damage to the MFC1000 frequency converter and connected equipment!

In the further part of this User manual, the MFC1000 frequency converter, to which this instruction applies,

will be also referred to as the “drive” or “converter”.

H.1.1. Warnings

Incorrect installation, usage, and maintenance of the drive can cause physical injury or death, or 
damage to the drive and connected equipment!

 

R I S K  O F  E L E C T R I C  

S H O C K!

The drive contains high voltage when connected to mains voltage!

Dangerous voltage present inside the device for at least 10 minutes after disconnecting the power

supply!

Installation, usage, and maintenance of the drive must be performed only by qualified personnel.

Don’t make any connections changes when the drive is connected to the power supply.

Before switching on the main power supply and control circuit voltage make sure the drive has been 
correctly installed and all housing elements have been properly assembled.

It is forbidden to touch the drive's voltage terminals if it is connected to the power supply. 

After connecting the drive to the supply voltage, its internal components (without the control terminals) 

are on the power supply potential. Touching these components can cause an electric shock.

When the drive is connected to the supply voltage, dangerous voltage appears at its output terminals U, 

V, W even when the electric motor is not running.

Externally supplied control circuits may carry dangerous voltage even when the input power of the drive 

is switched off.

After disconnecting the drive from the supply voltage, dangerous voltages still remain inside the drive 

due to the energy stored in the power circuit capacitors (DC-link circuit). It can cause an electric shock!
The time required for self-discharge of capacitors in an undamaged drive is usually between 5÷15 

minutes (a higher power rating of the drive means the longer time).
For this reason before starting any works on the drive, the electric motor or the electric motor cable 

always wait at least 10 minutes after disconnecting all power supplies sources and make sure that a 
voltage on a clamps is not present.

Attention! The lack of the voltage at the connection terminals does not ensure the lack of 
dangerous voltage in the internal DC-link circuit of the drive!

The drive is not adapted for use in flammable or explosive environment because it can cause fire or 
explosion. Use suitable flameproof enclosures.

4

MFC1000AcR, TWERD Power Electronics

Summary of Contents for MFC1000ACR

Page 1: ...Zak ad Energoelektroniki TWERD TWERD Power Electronics TWERD Active Front End converter type MFC1000AcR 75 kW 90 kW 110 kW 3 x 400 V 75 kW 90 kW 3 x 690 V User Manual Part I Hardware www twerd pl...

Page 2: ......

Page 3: ...5 Recycle 5 H 1 6 Limits of responsibility 5 H 1 7 CE marking 6 H 2 TECHNICAL DATA 7 H 3 Installation 11 H 3 1 Safety principles 11 H 3 1 Electromagnetic Compatibility EMC 11 H 3 3 Connecting the powe...

Page 4: ...ing elements have been properly assembled It is forbidden to touch the drive s voltage terminals if it is connected to the power supply After connecting the drive to the supply voltage its internal co...

Page 5: ...rdance with the order check the nameplate 3 Check up the correspondence between the conditions in which the converter will be used and conditions of an environment for which it is designed section H 1...

Page 6: ...ided TWERD logo is a trademark of TWERD Power Electronics All trademarks used are the property of their respective owners For more information contact out technical support at twerd twerd pl H 1 7 CE...

Page 7: ...used in such a network In IT grids usage of asymmetric filters of high frequency capacitors Y to reduce emission of interference ruins the concept of the distributive grid isolated from the ground Ad...

Page 8: ...alog inputs 1 voltage mode 4 voltage current mode AI0 voltage mode 0 2 10V Rin 200k AI1 AI2 AI3 AI4 voltage mode 0 2 10V Rin 100k current mode 0 4 20mA Rin 250 Operation mode and polarity are chosen b...

Page 9: ...cuit on unit output Overcurrent Instantaneous value 3 2 In effective value 2 25 In Overvoltage AC DC MFC1000 400 V 1 43 Uin AC 750 Vdc MFC1000 690 V 1 28 Uin AC 1200 Vdc Undervoltage 0 65 Uin Thermal...

Page 10: ...pter H 2 Technical data MECHANICAL DIMENSIONS Fig H 2 1 Mechanical dimensions MFC1000AcR converters Weight approximately 102 kg 10 kg depending on the nominal power 10 MFC1000AcR TWERD Power Electroni...

Page 11: ...or without fuses an AC 23B category of use that meets the requirements EN 60947 3 a disconnector with or without fuses which ensures disconnection of the load circuit by opening the main contacts com...

Page 12: ...is obligatory It is necessary to use grounding of the cable shielding on whole section of a cable on both ends For this purpose a special EMC grommets are used They provide valid contact of cable shi...

Page 13: ...e CAUTION just issuing the STOP command is not enough because there is a possibility of programmatic delay of the reaction to the STOP command par 13 20 and the possibility of setting the ramp stop pa...

Page 14: ...if the device is the last one on the communication bus 2 1 JP4 JP3 JP8 MFC1000 11 v2 RS 485 1 RS 485 2 RS 485 1 2 Fig H 3 2 MFC1000 11 board the placement of the main elements analog digital inputs o...

Page 15: ...puts H 3 6 Expansion cards Expansion cards enable extending the drive with additional inputs outputs There are 5 slots available 0 4 In each of them one expansion card can be installed Expansion board...

Page 16: ...l Outputs expansion card Relays expansion card Analog Outputs expansion card DI31 DO31 K33 AO31 DI32 DO32 K32 AO32 DI33 DO33 K31 xxx DI34 DO34 xxx xxx DI35 DO35 xxx xxx DI36 DO36 xxx xxx SLOT3 Digital...

Page 17: ......

Page 18: ...Zak ad Energoelektroniki TWERD sp z o o ul Aleksandrowska 28 30 87 100 Toru Poland tel 48 56 654 60 91 e mail twerd twerd pl SCALONE FIGURY www twerd pl...

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