Danfoss SISO iC7 LCL and LC Filters

Specifications:

• Product: SISO LCL and LC Filters
• Types: SISO-LCL-0525-5-0-AFTP, SISO-LC-0525-5-0-AFTP
• Contents: Separate inductors and capacitor banks
• Safety: IP00 filter, high voltage operation

Product Usage Instructions

Checking the Shipment:

If the product was damaged during transport, contact the cargo insurance company or the carrier.Make sure that the items supplied and the information on the product label correspond to the order confirmation.

Mechanical Installation – Safety Precautions:

DANGER SHOCK HAZARD FROM THE CAPACITORS

• After disconnecting the filter from the supply, wait 5 more minutes before doing any work on the filter.
• Do not open the doors or covers of the enclosure before ensuring no voltage is present.

DANGER SHOCK HAZARD

• Install the filter inside a supplementary enclosure or in a restricted-access area for protection against electric shock.

CAUTION BURN HAZARD

• Do not install the filter on a combustible surface.
• Avoid touching the filter when hot.

Mechanical Installation – Requirements:

For mechanical dimensions and mounting holes positions, refer tothe Dimensions section.

1. Install inductors on a horizontal surface.
2. Install capacitor banks with terminals upright.

If an alternative mounting orientation is needed, ensure proper support for the capacitor bank and contact Danfoss for guidance.

FAQ

• Q: What should I do if the product is damaged during transport?
  • A: Contact the cargo insurance company or the carrier for assistance.
• Q: Can I touch the filter when it is hot?
  • A: No, avoid touching the filter when it is hot to prevent burns.

Overview

SISO Filters

SISO (Sine In – Sine Out) LCL and LC filters combine both differential (DM) and common-mode (CM) filtering. SISO filters enable installations without a transformer, for example, for marine and energy storage applications.

Two different types of the SISO filter are available:

• SISO-LCL-0525-5-0-AFTP
• SISO-LC-0525-5-0-AFTP

Table 1: Description of the Type Code

Contents of the Delivery

The filter consists of separate inductors and capacitor banks. The components are delivered separately

1. Drive side inductor
2. Grid side inductor (only included in LCL filter)
3. CDM+CFB capacitor bank
4. CDelta capacitor bank

Checking the Shipment

Before delivery, the VACON® SISO LCL/LC Filter has been run through several demanding factory tests.

1. Examine the packaging and the filter components for transport damage.
   • If the product was damaged during transport, contact the cargo insurance company or the carrier.
2. Make sure that the items supplied and the information on the product label correspond to the order confirmation.
   • If the shipment does not match your order, contact the vendor immediately.
3. If the installation of the equipment is going to be in the future, cover and store the filter in a clean and dry location.
   • After storage and before installation, make sure that there is no condensation on the internal components of the filter.

Mechanical Installation

Safety

DANGER
SHOCK HAZARD FROM THE CAPACITORS

The capacitors can have hazardous charge even if electric power is switched off. Contact with this voltage can lead to death or serious injury.

• After disconnecting the filter from the supply, wait 5 more minutes before doing any work on the filter.
• Do not open the doors or covers of the enclosure before this time has expired.
• After expiration of this time, use measuring equipment to ensure that no voltage is present.
• Always ensure the absence of voltage before starting any electrical work.

DANGER
SHOCK HAZARD

This IP00 filter does not provide protection against direct contact to hazardous live parts. Touching any of the power connectors during operation can lead to death or serious injury.

• Install the filter inside a supplementary enclosure or in a restricted-access area which provides appropriate protection against electric shock.

CAUTION
BURN HAZARD

The filter is hot during operation.

• Do not install the filter on a combustible surface.
• Do not touch the filter when hot.

This guide is intended for use by qualified personnel who are experienced in the operation and maintenance of power quality filters. The personnel involved in the operation and maintenance of this filter must be aware of the necessary safety precautions for this type of equipment because of the high voltages required by the application.

Follow the instructions in this guide and relevant local regulations.

Installation Requirements

• The products described in this guide have the protection rating IP00/UL Open Type. Install the products in an enclosure that has a correct level of protection against the ambient conditions in the installation area. Make sure that the enclosure gives protection against water, humidity, dust, and other contaminations.
• The enclosure must also be sufficiently strong for the weight of the filter components and other devices.
• The protection rating of the enclosure must be at least IP21/UL Type 1. When preparing the installation, obey the local regulations.

Installing the SISO LCL or LC Filter into an Enclosure

For mechanical dimensions and the positions of the mounting holes, see 4.2 Dimensions.

1. Install the inductors on a horizontal surface.
2. Install the capacitor banks with the terminals upright.
   If another mounting orientation is required, make sure that the capacitor bank is properly supported. If necessary, contact Danfoss for instructions.
3. Make sure that the inductors do not heat up the capacitors. For example, install the capacitors and inductors in separate sections.

1. Grid side inductor (only included in LCL filter)
2. Drive side inductor
3. Airflow direction
4. Fan
5. CDelta capacitor bank
6. CDM+CFB capacitor bank

Cooling Requirements

For reliable operation, ensure sufficient cooling of the filter components. The product requires forced air cooling.

Make sure that the cooling airflow through the filter inductors is sufficient.

• The maximum temperature of the cooling air is 40 °C (104 °F).
• The minimum airflow is 3 m/s (10 ft/s).

Install air guides or ducts to guide the hot air from the inductors up, away from other components, and out of the enclosur

Electrical Installation

Power Cabling

Install the SISO LCL or LC filter at the input of the drive. Connect the LCM and CFB to the DC link. To make sure that the filter functions correctly, follow the instructions in 3.4 Installing the Power Cables. In Figure 3, L1 and LCM are part of the 4-leg drive side inductor. CDM and CFB are part of the same capacitor bank. L2 is the grid side inductor, which is only included in LCL filters. The CCM capacitor is optional and not included in the delivery by default. The CCM capacitor is typically used in grounded networks, bypassing the excess high-frequency noise from the load side. For further information, contact Danfoss.

Cable Requirements

For main power and PE cables, use cable sizes specified by local regulatory instructions and standards for a nominal 525 A rms current. Capacitor cables are not included in the delivery. The cable current ratings are shown in the following illustration as %-value from the rated RMS current of the filter.

Grounding

Make sure that all filter components are connected to PE. Ground the filter in accordance with applicable standards and directives. The ground connection must be fixed. Unless local wiring regulations state otherwise, the cross-sectional area of the protective earthing conductor must be at least ½ times of the phase conductor and made of the same material when the phase conductor cross-section is above 35 mm2 according to IEC 60364-5-54; 543.1.

Installing the Power Cables

NOTICE

Loose or improperly mounted connections can damage the performance of the filter.

• Make sure that all connections are tightened according to the instructions.
• Cabling between inductors and capacitor banks must not be longer than 2 m.
• Before connecting cables to the terminals, make sure that the surfaces of the terminals are properly cleaned.
• If 2 cables/phase are used, it is recommended to connect cables to both sides of the terminals.
• When routing the cables, avoid abrasion against sharp edges in inductor terminals and the frame of the enclosure.

1. Connect the cables to the drive side inductor L1/LCM.
   The terminal size is Ø11 mm (0.43 in). Use tightening torque 30–44 Nm (266–389 in-lb). See the terminal locations in Figure 5.
   • a. Connect the grid side AC cables to terminals L1, L2, and L3.
   • b. Connect the drive side AC cables to terminals L1′, L2′, and L3′.
   • c. Connect the DC terminals of the drive to terminals DC+’ and DC-‘.
   • d. Connect the DC link to terminals DC+ and DC-.
2. Connect the cables to the CDM+CFB capacitor bank.
   The terminal size is M10. Use tightening torque 12 Nm (106 in-lb). See the terminal locations in Figure 7.
   • a. Connect the terminals L1, L2, and L3 of the capacitor bank to the grid side (terminals L1, L2, and L3) of the drive side inductor L1.
   • b. Connect the terminals +DC and -DC to the DC-link side (terminals DC+ and DC-) of inductor LCM.
3. Connect the cables to the CDelta capacitor bank.
   The terminal size is M10. Use tightening torque 12 Nm (106 in-lb). See the terminal locations in Figure 8.
   • a. Connect the terminals L1, L2, and L3 to the grid side (terminals L1, L2, and L3) of the drive side inductor L1.
4. If included in the delivery, connect the grid side inductor L2 to the grid side of the drive side inductor L1 and the capacitor banks.
   The terminal size is Ø11 mm (0.43 in). Use tightening torque 30–44 Nm (266–389 in-lb). See the terminal locations in Figure 6.
   • a. Connect the L2 terminals L1, L2, and L3 to the grid side.
   • b. Connect the L2 terminals L1′, L2′, and L3′ to terminals L1, L2, and L3 of the drive side inductor L1.
5. If included in the delivery, connect the CCM capacitor between the star point of the CDM capacitor and ground.
   See the wiring diagram in Figure 3.
6. Connect the ground terminals of all components to PE.
   The ground terminal size on the inductors is Ø11 mm (0.43 in). Use tightening torque 55 Nm (486 in-lb).
   The ground terminal size on the capacitor banks is M10. Use tightening torque 55 Nm (486 in-lb).
   See the terminal locations in 3.5 Terminals.

Terminals

The markings on the inductor terminals are explained in the following table. The locations of the terminals are shown in the illustrations.

Table 2: Markings on the Terminals

Side / Marking

• Grid L1, L2, L3
• Drive AC L1′, L2′, L3′
• Drive DC +DC’, -DC’
• CFB +DC, -DC

Overtemperature Protection

The inductors of the SISO LCL/LC filter have thermal relays and Pt100 temperature sensors. The relays and sensors are installed on the surface of winding L2/V and the DC winding.

• Alarm temperature limit: 110 °C (230 °F)
• Fault temperature limit: 120 °C (248 °F)

1. Install the thermal relay and Pt100 temperature sensor wires to the drive side inductor.
   See the terminal locations in Figure 5.
   • a. Connect the alarm relay for AC phase windings to terminals 1.1 and 1.2.
   • b. Connect the fault relay for AC phase windings to terminals 2.1 and 2.2.
   • c. Connect the alarm relay for DC windings to terminals 1.3 and 1.4.
   • d. Connect the fault relay for DC windings to terminals 2.3 and 2.4.
   • e. Connect the sensor for AC phase windings to terminals 3.1 and 3.2.
   • f. Connect the sensor for DC windings to terminals 4.1 and 4.2.
2. If the grid side inductor is included in the delivery, install the thermal relay and Pt100 temperature sensor wires to it.

See the terminal locations in Figure 6.

• a. Connect the alarm relay to terminals 1 and 2.
• b. Connect the fault relay to terminals 3 and 4.
• c. Connect the sensor to terminals 5 and 6.

Fuses

Danfoss products require fuses for protection. To protect the products from short circuits and excessive loads, input line fuses must be used. The SISO filter needs separate fuses for the feedback loop. This guide provides a recommendation for the SISO filter fuses, but the customer is responsible for ensuring the correct fuse protection for the device. The locations of the fuses are shown in Figure 9. Only the FSISO fuses are addressed in this section. FAFE is marked on the wiring diagram to indicate that when the SISO filter is installed, these fuses must be installed after the feedback loop. Without the SISO filter, the FAFE fuses are installed immediately after the AFE. When preparing the installation, obey the local regulations.

The following type of fuse protection is recommended for FSISO:

• Install 2 fuses in parallel for both capacitors.
• Suitable fuse holders are required.
• Voltage rating: 1000 V DC
• Current rating: 30 A per fuse
• Maximum short-circuit capacity: 100 kA @L/R ≤1 ms
• Operating temperature: -30 °C…+70 °C
• The fuses must be current-limiting.

NOTICE

• Make sure that the power cables are compatible with the fuses.
• The power cables must be able to withstand short-circuit currents and ensure sufficient I²t durability.

Specifications

Technical Data

Table 3: Specifications

Dimensions

Maintenance

Preventive Maintenance Recommendations

Generally, all technical equipment need a minimum level of preventive maintenance. Regular maintenance is recommended to ensure trouble-free operation and long life of the product. It is also recommended, as a good service practice, to record a maintenance log with counter values, date, and time describing the maintenance and service actions. Danfoss recommends the following inspections and service intervals for the product.

NOTICE

The service schedule for part replacements can vary depending on operating conditions. Under specific conditions, the combination of stressful operation and environmental conditions work together to reduce the lifetime of the components significantly. These conditions can include, for example, extreme temperature, dust, high humidity, hours of use, corrosive environment, and loading.

For operation in stressful conditions, Danfoss offers the DrivePro® Preventive Maintenance service. DrivePro® services extend the lifetime and increase the performance of the product with scheduled maintenance including customized part replacements. DrivePro® services are tailored to your application and operating conditions.

Table 4: Maintenance Schedule

1. Defined as the time after the commissioning/start-up or the time from the previous inspection.
2. Defined as the time after the commissioning/start-up or the time from the previous service schedule actions.

Recommended Disposal

When the product reaches the end of its service life, its primary components can be recycled.

Before the materials can be removed, the product must be disassembled. Product parts and materials can be dismantled and separated. Generally, all metals, such as steel, aluminum, copper and its alloys, and precious metals can be recycled as material. Plastics, rubber, and cardboard can be used in energy recovery. Printed circuit boards and large electrolytic capacitors with a diameter of over 2.5 cm (1 in) need further treatment according to IEC 62635 guidelines. To ease recycling, plastic parts are marked with an appropriate identification code. Contact your local Danfoss office for further information on environmental aspects and recycling instructions for professional recyclers. End-of-life treatment must follow international and local regulations. All products are designed and manufactured in accordance with Danfoss company guidelines on prohibited and restricted substances. A list of these substances is available at www.danfoss.com.

This symbol on the product indicates that it must not be disposed of as household waste. Do not dispose of equipment containing electrical components together with domestic waste.
It must be handed over to the applicable take-back scheme for the recycling of electrical and electronic equipment.

• Dispose of the product through channels provided for this purpose.
• Comply with all local and currently applicable laws and regulations. Danfoss

Danfoss Drives Oy

• Runsorintie 7
• FIN-65380 Vaasa
• drives.danfoss.com

Any information, including, but not limited to information on the selection of the product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalog descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the extent, explicit reference is made in a quotation or order confirmation. Danfoss cannot accept any responsibility for possible errors in catalogs, brochures, videos and other material. Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without changes to form, fit or function of the product. All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.

Documents / Resources

Danfoss SISO iC7 LCL and LC Filters [pdf] Installation Guide SISO iC7 LCL and LC Filters, iC7 LCL and LC Filters, LCL and LC Filters, LC Filters, Filters

References

• User Manual