SMA AC-SPD STP 110-60 Manual

Information on this Document

Validity

This document is valid for:

• Spare Part AC-SPD board STP 110-60 (AC-SPD assembly)

Target Group

The tasks described in this document must only be performed by qualified persons. Qualified persons must have the following skills:

• Within the SMA factory warranty, participation in an SMA training course is mandatory forcarrying out the activities described in this document. The type of training and the media used may vary from country to country. The type and method of training can therefore vary from country to country, but must have been completed before the service is provided.
• Outside the SMA factory warranty, SMA Solar Technology AG recommends participation inan SMA training course to perform the activities described in this document. This ensures the quality requirements for proper replacement of assemblies. The type of training and the media used may vary from country to country.
• Knowledge of how to safely disconnect SMA inverters
• Knowledge of how an inverter works and is operated
• Training in how to deal with the dangers and risks associated with installing, repairing andusing electrical devices and installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of all applicable laws, regulations, standards, and directives
• Knowledge of and compliance with this document and all safety information

Content and Structure of this Document

This document describes how to replace components.
Illustrations in this document are reduced to the essential information and may deviate from the real product.

Levels of Warning Messages

The following levels of warning messages may occur when handling the product.

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

Indicates a situation which, if not avoided, can result in property damage.

Symbols in the Document

Symbol	Explanation
	Information that is important for a specific topic or goal, but is not safety-relevant
☐	Indicates a requirement for meeting a specific goal
	Required result
	Example

Typographies in the document

Designations in the Document

Scope of Delivery

Check the scope of delivery for completeness and any externally visible damage. Contact the Service if the scope of delivery is incomplete or damaged.

Component Overview

Disconnecting the Inverter from Voltage Sources

Prior to performing any work on the inverter, always disconnect it from all voltage sources as described in this section. Always adhere to the prescribed sequence.

Danger to life due to electric shock from destruction of the measuring device due to overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the enclosure of the measuring device. Touching the live enclosure of the measuring device results in death or lethal injuries due to electric shock.

• Only use measuring devices with a DC input voltage range of 1100 V or higher.

Procedure:

1. Disconnect the AC miniature circuit breaker and secure against reconnection.
2. Switch off all four DC load-break switches of theinverter and secure against reconnection.
   
3. Wait until the LEDs have gone out.
4. Use a current clamp to ensure that no current ispresent in the DC cables.
   
5. Note the position of the DC connector.

6. 
   Danger to life due to electric shock when touching exposed DC conductors or DC plug contacts if the DC connectors are damaged or loose
   The DC connectors can break or become damaged, become free of the DC cables, or no longer be connected correctly if the DC connectors are released and disconnected incorrectly. This can result in the DC conductors or DC plug contacts being exposed. Touching live DC conductors or DC plug connectors will result in death or serious injury due to electric shock.

• Wear insulated gloves and use insulated tools when working on the DC connectors.
• Ensure that the DC connectors are in perfect condition and that none of the DC conductors or DC plug contacts are exposed.
• Carefully release and remove the DC connectors as described in the following.

7. Release and remove the DC connectors. To do so, insert a flat-blade screwdriver or an angled screwdriver (blade width: 3.5 mm) into one of the side slots and pull the DC connectors out. When doing so, do not lever the DC connectors out, but insert the tool into one of the side slots only to release the locking mechanism, and do not pull on the cable.
   
8. Ensure that the DC connectors on the product and those that are equipped with DCconductors are in perfect condition and that none of the DC conductors or DC plug contacts are exposed.

10. Loosen the 2 screws on the cable compartment cover using the enclosed internal Allen key (TX30) and open the cable compartment.
    

11. Lift the limiting lever on the inside of the cover on theright and remove from the thread.
    
12. Fold the limiting lever on the joint and turn it towardsthe cable compartment.
    
13. Engage the end of the limiting lever in the cablecompartment with the thread.
    The cable compartment cover has been secured and remains open.
    
14. Verify a de-energized state of the AC connection between L1 and L2, L2 and L3, L1 and L3 und L1 and grounding conductor, L2 and grounding conductor and L3 and grounding conductor using a suitable measuring device. For this purpose, hold the test probe to the conductors' ring terminal lugs.
    

Removing the AC-SPD Assembly

Procedure:

1. Disconnect the inverter from all voltage sources.
2. Unscrew the four screws of the AC protective cover(PH2), remove the AC protective cover, and discard the screws.
   
3. Remove the four lower conductors (L1, L2, L3, and PE) for the AC connection by loosening the hex nuts (AF19) and then removing the conductors from the threads. Keep the removed parts for later use.
   
4. Write down the connecting positions of the cables at the top of the AC terminals so that thecables can be reconnected at the same points later.
5. Loosen the hex nuts of the upper three cables (L1,L2, and L3) (AF13) and remove the cables from the threads. Ensure that the four cables behind them remain on the plate with the AC terminals. Keep the removed parts for later use.
   
6. Loosen the screw (PH2) and remove the cable (PE).
   
7. Loosen all six screws on the plate holding the ACterminal block (5x PH1, 1x AF13) and discard them.
   
8. Carefully tilt the plate with the AC terminalsdownwards and remove it sideways.
   
9. Cut the cable tie above the assembly and detachthe ferrite ring core.
   
10. Disconnect the six AC cables (AF10 or PH2) andthe control cable on the assembly.
    
11. Loosen the six screws of the assembly (PH1,100 mm). To do so, hold the assembly and loosen the lower screws first. Then remove the assembly sideways and downwards.
    
12. Install the new assembly.

Installing the AC-SPD Assembly

☐ The new assembly is compatible with the inverter.

Procedure:

1. Ensure that the square of black film is in the correct position under the assembly and is not damaged. If the film is damaged, remove it and add the film provided in the same position.
   
2. Insert the new assembly provided. Fasten andtighten the screws (M4x10) from the scope of delivery at the lower right and top left first (PH1, tightening torque: 1.5±0.1 Nm).
   
3. Fasten and tighten the remaining four screws(M4x10) from the scope of delivery (PH1, tightening torque: 1.5±0.1 Nm).
   
4. Pass the cable tie provided through the ferrite ringcore above the assembly and secure it again. Cut off the protruding end of the cable tie with a suitable tool.
   
5. Connect the three AC cables on the right side of theassembly to their original position. Align the terminal lugs correctly and tighten the screws provided (M6x14) (AF10, tightening torque: 4.2±0.1 Nm).
   Risk of incorrect pole assignment: Ensure the correct assignment of the AC cables (L1, L2, L3).
   
6. Connect the three AC cables on the left side of theassembly to their original position. Align the terminal lugs correctly and tighten the screws provided (M6x14) (AF10, tightening torque: 4.2±0.1 Nm).
   Risk of incorrect pole assignment: Ensure the correct assignment of the AC cables (L1, L2, L3).
   
7. Connect the control cables.
   
8. Lift the plate with the AC terminals sideways and to the right into the enclosure.
9. Secure the plate with the AC terminals first with thescrew (M8x20) provided. Then fasten the five screws (M4x10) from the scope of delivery. Tighten all six screws (5x PH1, tightening torque: 1.5±0.1 Nm/1x AF13, tightening torque: 4.3±0.1 Nm).
   
10. Fasten the three cables (L1, L2, and L3) to the top ofthe AC terminals using the hex nuts (AF13, tightening torque: 14±0.5 Nm). Ensure that the original order of the cables is restored and that the four cables behind them remain on the plate with the AC terminals.
    
11. Fasten PE (PH#).
    
12. Attach the four lower conductors (L1, L2, L3, andPE) with the ring terminal lugs as labeled for L1, L2, L3, and PE to the threads at the top of the cable compartment.
    
13. Install one washer each and tighten the hex nutusing a ratchet (AF19, tightening torque: 40 Nm).
    
14. Ensure that the cables and AC terminals are properly tightened by performing a pull andtorsion test on all mounted cables.
15. Reattach the AC protective cover in front of the ACconnection using the remaining screws (M4x10) from the scope of delivery (PH2, tightening torque: 1.5 Nm).
    
16. Recommission the inverter.

Commissioning the Inverter

Requirements:
☐ All cables must be correctly connected.
☐ Unused enclosure openings must be sealed tightly with sealing plugs.

Procedure:

1. Close the cable compartment and tighten the screwson the cable compartment cover (TX 30, torque: 4.3 Nm).
   
2. Connect the assembled DC connectors to the inverter.
   The DC connectors snap into place.
3. Ensure that all DC connectors are securely in place.
4. Switch on all 4 DC load-break switches.
   
5. Switch on the AC circuit breaker.
   Green LED is flashing. The inverter is waiting for the input conditions.
   After approx. 90 seconds, the green LED is permanently on. The inverter is feeding in.
6. If the green LED is still flashing after 90 seconds, the conditions for activating feed-in operationare not yet met. As soon as the conditions for feed-in operation are met, the inverter starts with the feed-in operation and the green LED will light up continuously.
7. If the red LED lights up, an event has occurred. Use the event number to find out which eventhas occurred and, if necessary, initiate countermeasures.
8. Ensure that the inverter feeds in correctly.

Returning and Disposing of the Defective Assembly

If the defective assembly is to be returned, this will be stated on the order form.

Procedure:

1. If the defective assembly is to be returned, pack the defective assembly for shipment. Use theoriginal packaging for this, or packaging that is suitable for the weight and size of the assembly. In addition, ensure that the ESD protection of the assembly is guaranteed (e.g., by wrapping the assembly with an ESD foil). For this purpose, the packaging of the new assembly can be used. Organize the return shipment to SMA Solar Technology AG. Contact the Service.
2. If the assembly is not to be returned, dispose of the assembly in accordance with the locallyapplicable disposal regulations for waste electrical and electronic equipment.

Safety

Intended Use

This spare-part set enables the replacement of the AC-SPD assembly (AC-SPD) in SMA inverters.
The product must only be installed in the following SMA inverters:

• STP 110-60 (Sunny Tripower CORE2)
  Use SMA products only in accordance with the information provided in the enclosed documentation and with the locally applicable laws, regulations, standards and directives. Any other application may cause personal injury or property damage.
  Alterations to the SMA products, e.g., changes or modifications, are only permitted with the express written permission of SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such changes.
  Any use of the product other than that described in the Intended Use section does not qualify as appropriate.
  The enclosed documentation is an integral part of this product. Keep the documentation in a convenient, dry place for future reference and observe all instructions contained therein.
  This document does not replace any regional, state, provincial, federal or national laws, regulations or standards that apply to the installation, electrical safety and use of the product. SMA Solar Technology AG assumes no responsibility for the compliance or non-compliance with such laws or codes in connection with the installation of the product.
  If the replacement and all activities stated in this document are carried out by persons who are not qualified within the meaning of this documentation, this will void the guarantee and warranty claims and in most cases terminate the operating permit. SMA Solar Technology AG shall not be held liable for any damage caused directly or indirectly due to such changes by unauthorized persons.

IMPORTANT SAFETY INFORMATION

Keep the manual for future reference.
This section contains safety information that must be observed at all times when working.
The product has been designed and tested in accordance with international safety requirements. As with all electrical or electronical devices, some residual risks remain despite careful construction. To prevent personal injury and property damage and to ensure long-term operation of the product, read this section carefully and observe all safety information at all times.

Danger to life due to electric shock when live components or cables of the inverter are touched
High voltages are present in the conductive components or cables of the inverter. Touching live parts and cables of the inverter results in death or lethal injuries due to electric shock.

• Disconnect the inverter from voltage sources and make sure it cannot be reconnected before working on the device.
• After disconnection, wait 5 minutes until the capacitors have discharged.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch non-insulated parts or cables.

Grounding conductor test prior to recommissioning
Prior to recommissioning SMA inverters after the installation of SMA components or power assemblies which cannot be replaced intuitively, ensure that the grounding conductor in the inverter is correctly connected. The function of the grounding conductor must be ensured and all locally applicable laws, standards and directives must be observed.

Observe superordinate standards
The repair work on devices and the consideration and application of other standards which correspond to a superordinate standard is the responsibility of the qualified person performing the work. Unauthorized alterations will void guarantee and warranty claims and in most cases terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such changes.