Vacon VEDA-NX101A, TSZ1250, 102a, 900kW Vacon High Voltage Frequency Converter

Vacon NX High Voltage Frequency Converter

Control system for high-voltage electric motors using a two-transformer circuit

• ● The system consists of a low-voltage frequency converter (0.4/0.69 kV) and standard transformers.
• ● Optimal design solution;
• ● Two-stage conversion;
• ● Built-in sine wave filter;
• ● Versions with 6-, 12- and 18-pulse rectifier;
• ● various placement options (UHL4-for installation in heated rooms, U1 and UHL1-installation in an autonomous modular building).
• ● Power range: 250...2000 kW.
• Control system for high-voltage electric motors using a two-transformer circuit

Management systems high-voltage electric motors They consist of low-voltage frequency converters (0.4/0.69 kV) and standard transformers.

Application

• Sewage pumping stations.
• Pumping stations I and II lifting.
• Network pumps of CHP, RTS and KTS.
• Technical specifications
• The supply voltage of the controlled electric motors is 2-12 kV ± 10%.
• The frequency of the supply network is 45...66 Hz.
• The power of the controlled electric motors is 160...5000 kW.
• Protection of the cabinet housing with an IP21 /IP54 frequency converter.
• The power factor of the system is ~1.
• The efficiency of the system (including matching transformers) is 96% (IF efficiency is ~ 98.5%).

Advantages of a two-transformer circuit

• Maximum flexibility in choosing the supply voltage of the electric motor.
• Galvanic isolation (due to the presence of transformers).
• The absence of high-frequency voltage components affecting the winding of the electric motor.
• No bearing currents (due to the filter and galvanic isolation).
• Low noise level (due to the almost perfect sinusoidal current and voltage).
• Versions with 6, 12 and 18 pulse rectifier.

Ease of maintenance of the frequency converter:

• free space at the back of the cabinet is not required (possibility of installation close to the wall);
• the power part of the converter can be extended outwards on the guide rails;
• the possibility of installing additional protection and control devices (circuit breakers, contactors, relays, etc.).

Standard delivery package

• The frequency converter.
• A sinusoidal filter.
• Three-phase network choke.
• The EMC filter.
• Step-up and step-down transformers.

Variants of control systems according to the composition of the equipment:

• VEDA: Trafotek dry transformers (Finland) and Vacon NXC frequency converter (cabinet version, IP21/IP54, 690 V) with SIN filter (Finland)

RUS: Vacon NXC IF (cabinet version, IP21/IP54) and:

• 690 V - dry special TSZP type converter transformers (IP23);
• 400 V - oil transformers of type TMG11 (UHL4, U(XL)1).

RUSELCOM RVP-C (cabinet version, IP21/IP54) and:

• 690 V - dry special TSZP type converter transformers (IP23);
• 400 V - oil transformers of type TMG11(UHL4, U(XL)1).

RUSELCOM RVP (floor version, IP21/IP54), SIN filter (IP00 – for installation in a separate cabinet by the customer) and:

• 690 V - dry special TSZP type converter transformers (IP23);
• 400 V - oil transformers of type TMG11 (UHL4, U(XL)1).

Accommodation options:

• UHL4 version – for installation in heated rooms;
• version U1, UHL1 – placement of a low–voltage (0.4/0.69 kV) frequency converter in a modular building with a preheating and climate control system, placement of transformers in accordance with the technical conditions of the enterprise