Replacement Manual - AUTOMATIC BACKUP UNIT · 6.1.2 Installing the SMA Backup Unit Controller 1. Place the SMA Backup Unit Controller onto the DIN rail from above and hook it in

SBS-ABU-xx-US-10-RM-en-10 | 117671-00.01 | Version 1.0ENGLISH

Replacement ManualAUTOMATIC BACKUP UNITReplacement of Various Components

Table of Contents SMA Solar Technology AG

Replacement ManualSBS-ABU-xx-US-10-RM-en-102

Table of Contents1 Information on this Document................................................. 3

1.1 Validity ........................................................................................................................ 31.2 Target Group.............................................................................................................. 31.3 Content and Structure of this Document ................................................................... 31.4 Levels of warning messages ...................................................................................... 31.5 Symbols in the Document .......................................................................................... 41.6 Typographies in the document .................................................................................. 41.7 Designation in the document ..................................................................................... 4

2 Safety ........................................................................................ 52.1 Intended Use .............................................................................................................. 52.2 IMPORTANT SAFETY INSTRUCTIONS.................................................................... 5

3 Scope of Delivery ..................................................................... 7

4 Component Overview ............................................................. 8

5 Disconnecting the Automatic Transfer Switch from VoltageSources...................................................................................... 9

6 Assembly Replacement............................................................ 106.1 Replacing the SMA Backup Unit Controller ............................................................. 10

6.1.1 Removing the SMA Backup Unit Controller.......................................... 106.1.2 Installing the SMA Backup Unit Controller ........................................... 11

6.2 Replacing the Power Contactor -Q1......................................................................... 116.2.1 Removing the Power Contactor -Q1 ..................................................... 116.2.2 Installing the Power Contactor -Q1....................................................... 12

6.3 Replacing the Power Contactor -Q5......................................................................... 136.3.1 Removing the Power Contactor -Q5 ..................................................... 136.3.2 Installing the Power Contactor -Q5....................................................... 14

6.4 Replacing Energy Meters .......................................................................................... 146.4.1 Installing the Energy Meter .................................................................... 146.4.2 Installing the Energy Meter .................................................................... 15

7 Recommissioning the Automatic Transfer Switch .................. 16

8 Returning and Disposing of the Defective Assembly ............ 17

9 Contact ...................................................................................... 18

1 Information on this DocumentSMA Solar Technology AG

Replacement Manual SBS-ABU-xx-US-10-RM-en-10 3

1 Information on this Document

1.1 ValidityThis document is valid for:

• SBS-ABU-200-US-10 / BUUM3-US-10

1.2 Target GroupThe tasks described in this document must only be performed by qualified persons. Qualifiedpersons must have the following skills:

• Knowledge of how to safely disconnect SMA inverters• Training in how to deal with the dangers and risks associated with installing, repairing and

using electrical devices and installations• Training in the installation and commissioning of electrical devices and installations• Knowledge of all applicable laws, standards and directives• Knowledge of and compliance with this document and all safety information

1.3 Content and Structure of this DocumentThis document describes how to replace components.This document supplements the documents that are enclosed with each product and does notreplace any locally applicable codes or standards. Read and observe all documents supplied withthe product.Illustrations in this document are reduced to the essential information and may deviate from the realproduct.

1.4 Levels of warning messagesThe following levels of warning messages may occur when handling the product.

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

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

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

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

1 Information on this Document SMA Solar Technology AG


1.5 Symbols in the DocumentSymbol Explanation

Information that is important for a specific topic or goal, but is not safety-rele-vant

Indicates a requirement for meeting a specific goal

Desired result

A problem that might occur

Example

1.6 Typographies in the documentTypography Use Examplebold • Messages

• Terminals• Elements on a user interface• Elements to be selected• Elements to be entered

• Connect the insulatedconductors to the terminalsX703:1 to X703:6.

• Enter 10 in the fieldMinutes.

> • Connects several elements to beselected

• Select Settings > Date.

[Button][Key]

• Button or key to be selected orpressed

• Select [Enter].

1.7 Designation in the documentComplete designation Designation in this documentAutomatic Backup Unit Automatic transfer switch, product

2 SafetySMA Solar Technology AG


2 Safety

2.1 Intended UseUse the spare-part sets only in accordance with the information provided in this documentation andwith the locally applicable laws, regulations, standards and directives. Any other application maycause personal injury or property damage.Unauthorized or improper use will void guarantee and warranty claims and in most cases terminatethe operating license. SMA Solar Technology AG shall not be held liable for any damage causedby such use.This document does not replace and is not intended to replace any local, state, provincial, federalor national laws, regulations or codes applicable to the installation, electrical safety and use of theproduct. 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.

2.2 IMPORTANT SAFETY INSTRUCTIONSSAVE THESE INSTRUCTIONSThis section contains safety information that must be observed at all times when working on or withthe product.The product has been designed and tested in accordance with international safety requirements. Aswith all electrical or electronical devices, there are residual risks despite careful construction. Toprevent 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.

DANGERDanger to life due to electric shock when live components or cables aretouchedHigh voltages are present in the conductive components or cables of the product. Touching liveparts and cables results in death or lethal injuries due to electric shock.

• Do not touch non-insulated parts or cables.• Disconnect the system from voltage sources and make sure it cannot be reconnected before

working on the device.• Wear suitable personal protective equipment for all work on the product.

CAUTIONRisk of injury due to weight of productInjuries may result if the product is lifted incorrectly or dropped while being transported or whenattaching it to or removing it from the wall mounting bracket.

• Transport and lift the product carefully. Take the weight of the product into account.• Wear suitable personal protective equipment for all work on the product.

2 Safety SMA Solar Technology AG


NOTICEDamage to the product due to sand, dust and moisture ingressSand, dust and moisture penetration can damage the product and impair its functionality.

• Only open the product if the humidity is within the thresholds and the environment is free ofsand and dust.

• Do not open the product during a dust storm or precipitation.• The product must only be closed during operation.

NOTICEDestruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 600 V or higher.

Electrical installations (for North America)All installations must conform with the laws, regulations, codes and standards applicable in thejurisdiction of installation (e.g. National Electrical Code® ANSI/NFPA 70 or CanadianElectrical Code® CSA-C22.1.).

• Before connecting the product to the utility grid, contact your local grid operator. Theelectrical connection of the product must be carried out by qualified persons only.

• Ensure that the cables or conductors used for electrical connection are not damaged.

Observe superordinate standardsThe repair work on devices and the consideration and application of other standards whichcorrespond to a superordinate standard is the responsibility of the qualified person performingthe work. Unauthorized alterations will void guarantee and warranty claims and in most casesterminate the operating license. SMA Solar Technology AG shall not be held liable for anydamage caused by such changes.

3 Scope of DeliverySMA Solar Technology AG


3 Scope of DeliveryCheck the scope of delivery for completeness and any externally visible damage. Contact yourdistributor if the scope of delivery is incomplete or damaged.

A B C D E

Figure 1: Components included in the scope of delivery

Scope of delivery of the SMA Backup Unit Controller

Position Quantity DesignationA 1 SMA Backup Unit Controller SBS-BUC-10-US

(773-576-000-001)

E 1 Documentation

Scope of delivery for the replacement of the power contactor -Q1

Position Quantity DesignationB 1 Power contactor 690VAC 250A 3xNO

(NR-SBS-BUCUS-10-01)

E 1 Documentation

Scope of delivery for the replacement of the power contactor -Q5

Position Quantity DesignationC 1 Power contactor 690VAC 37A 2xNO 2xNC

(773-576-001-001)

E 1 Documentation

Scope of delivery for the replacement of the energy meter

Position Quantity DesignationD 1 Energy meter WattNode power and energy

(773-812-000-001)

E 1 Documentation

4 Component Overview SMA Solar Technology AG


4 Component Overview

B

C

D

A

E

Figure 2: Component overview of the automatic transfer switch

Position DesignationA AC contactor -Q1 (773-576-000-001)

B SMA Backup Unit Controller (NR-SBS-BUCUS-10-01)

C Power contactor -Q5 for split phase transformer (773-576-001-001)

D Energy meter (773-812-000-001)

E Circuit breaker -F5

5 Disconnecting the Automatic Transfer Switch from Voltage SourcesSMA Solar Technology AG


5 Disconnecting the Automatic Transfer Switch fromVoltage Sources

Before working disconnect the automatic transfer switch from all voltage sources as described inthis section.

NOTICEDestruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 600 V or higher.

Procedure:1. Disconnect the AC circuit breaker and secure it against reconnection.2. Disconnect the inverter and the battery from voltage sources (see inverter manual).3. Open the automatic transfer switch using the switch cabinet key.4. Unscrew the screws of the dead front using a screwdriver (PZ3) and remove the dead front.5. Check that the automatic transfer switch is disconnected from the power supply.

6 Assembly Replacement SMA Solar Technology AG


6 Assembly ReplacementThis document describes the replacement of the following assemblies:

Assembly SeeSMA Backup Unit Controller Section 6.1, page 10

Power contactor -Q1 Section 6.2, page 11

Power contactor -Q5 Section 6.3, page 13

Energy meter Section 6.4, page 14

6.1 Replacing the SMA Backup Unit Controller

6.1.1 Removing the SMA Backup Unit Controller1. Disconnect the automatic transfer switch from voltage sources (see Section 5, page 9).2. Before removing the plugs, check that the imprint on the conductors is legible. If the imprint is

not legible, mark or note all plug positions and terminals for the installation of the newSMA Backup Unit Controller.

3. Remove all plugs from the SMA Backup Unit Controller.4. Release the SMA Backup Unit Controller and

remove it from the DIN rail. For this, insert ascrewdriver into the DIN rail locking mechanismlocated underneath the SMA Backup Unit Controllerand push it up.

12

6 Assembly ReplacementSMA Solar Technology AG


6.1.2 Installing the SMA Backup Unit Controller1. Place the SMA Backup Unit Controller onto the DIN

rail from above and hook it in.

1

2

1

2

2. Insert all plugs into the terminals of the SMA Backup Unit Controller in accordance with themarkings made during removal.

3. Ensure that all SMA Backup Unit Controller contacts are securely in place.4. Set the rotary switch S2101 to 0 and the rotary

switch S2100 to 8.

01

43

2

8

5

679AB

DC

FE

01

43

2

8

5

679A

BD

C

FE

S2100

S2101

5. Recommission the automatic transfer switch (see Section 7, page 16).

6.2 Replacing the Power Contactor -Q1

6.2.1 Removing the Power Contactor -Q11. Disconnect the automatic transfer switch from voltage sources (see Section 5, page 9).2. Before removing the plugs, check that the imprint on the conductors is legible. If the imprint is

not legible, mark the cables connected to the power contactor -Q1 for the installation of thenew power contactor -Q1.



3. Remove the trigger and feedback contactsconnected to the power contactor -Q1. Use a cross-head screwdriver (PZ2) for this.

4. Remove the power cables connected to the powercontactor -Q1. To do this, use a hex socketscrewdriver (6 mm (0.236 in)).

5. Remove the power contactor -Q1 from theautomatic transfer switch. Use a cross-headscrewdriver (PZ2) for this.

6.2.2 Installing the Power Contactor -Q11. Install the power contactor -Q1 into the automatic transfer switch. Use a cross-head

screwdriver for this (PZ2, torque: 2.9 Nm (25.7 in-lb)).



2. Connect the power cables to the power contactor -Q1 in accordance with the markings madeduring removal. For this, tighten the fastening screws (hex socket (6 mm (0.236 in)), torque:18 Nm (160 in-lb)).

3. Connect the trigger and feedback contacts to the power contactor -Q1 in accordance with themarkings made during removal. For this, tighten the fastening screws (PZ2, torque: 1.0 Nm(8.8 in-lb)).

4. Recommission the automatic transfer switch (see Section 7, page 16).

6.3 Replacing the Power Contactor -Q5

6.3.1 Removing the Power Contactor -Q51. Disconnect the automatic transfer switch from voltage sources (see Section 5, page 9).2. To achieve a larger work area, remove the SMA Backup Unit Controller (see Section 6.1.1,

page 10).3. To achieve a larger work area, remove the circuit breaker -F5 if necessary.4. Before removing the plugs, check that the imprint on the conductors is legible. If the imprint is

not legible, mark the cables connected to the power contactor -Q5 for the installation of thenew power contactor -Q5.

5. Remove the auxiliary contact from the powercontactor -Q5.

1

2

6. Remove the switching and supply cables from thepower contactor -Q5. Use a cross-head screwdriver(PZ2) for this.

8x8x8x

7. Remove the power contactor -Q5 from the DIN rail. For this, press the power contactor -Q5from above and remove it from the DIN rail.



6.3.2 Installing the Power Contactor -Q51. Hook the power contactor -Q5 into the DIN rail.2. Connect the cables to the power contactor -Q5 in accordance with the markings made during

removal. For this, tighten the fastening screws (PZ2, torque of the power connections: 2.5 Nm(22.1 in-lb), torque of the feedback contacts: 1.2 Nm (10.6 in-lb)).

3. Attach the auxiliary contact to the power contactor -Q5.4. Install the SMA Backup Unit Controller (see Section 6.1.2, page 11).5. If the circuit breaker -F5 has been removed for the replacement of the power support -Q5,

install the circuit breaker -F5.6. Recommission the automatic transfer switch (see Section 7, page 16).

6.4 Replacing Energy Meters

6.4.1 Installing the Energy Meter1. Disconnect the automatic transfer switch from voltage sources (see Section 5, page 9).2. To achieve a larger work area, remove the SMA Backup Unit Controller (see Section 6.1.1,

page 10).3. To achieve a larger work area, remove the circuit breaker -F5 if necessary.4. Remove the plugs from the top and bottom of the

energy meter.

5. Remove the fastening screws of the energy meter. Todo this, use a hex socket screwdriver (6 mm(0.236 in)).



6.4.2 Installing the Energy Meter1. Set the terminal resistance slide according to the

positions of the removed energy meter.

2345678

2. Install the energy meter into the automatic transfer switch. To do this, use a hex socketscrewdriver (6 mm (0.236 in), torque: 0.4 Nm (3.5 in-lb)).

3. Attach the plugs at the top and bottom of the energy meter.4. Install the SMA Backup Unit Controller (see Section 6.1.2, page 11).5. If the circuit breaker -F5 has been removed for the replacement of the power support -Q5,

install the circuit breaker -F5.6. Recommission the automatic transfer switch (see Section 7, page 16).

7 Recommissioning the Automatic Transfer Switch SMA Solar Technology AG


7 Recommissioning the Automatic Transfer Switch1. Carry out the necessary tests according to the locally applicable laws, standards and

directives for the correct recommissioning after power assembly replacement. Take therequirements for component replacements into account (see Section 2.2 "IMPORTANTSAFETY INSTRUCTIONS", page 5).

2. Commission the battery-backup system (see installation manual of the automatic transferswitch).

8 Returning and Disposing of the Defective AssemblySMA Solar Technology AG


8 Returning and Disposing of the Defective AssemblyIf 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 shipping. Use the original packaging for this, orpackaging that is suitable for the weight and size of the assembly.

• Organize the return shipment to SMA Solar Technology AG. Contact the Service (seeSection 9, page 18).

2. If the assembly is not to be returned, dispose of the assembly in accordance with the locallyapplicable disposal regulations for electronic waste.

9 Contact SMA Solar Technology AG


9 ContactIf you have technical problems with our products, please contact the SMA Service Line. Thefollowing data is required in order to provide you with the necessary assistance:

• Device type• Serial number

United States SMA Solar TechnologyAmerica LLCRocklin, CA

Toll free for USA and US Territories+1 877-MY-SMATech (+1 877-697-6283)International: +1 916 625-0870

Canada SMA Solar TechnologyCanada Inc.Mississauga

Toll free for Canada / Sans frais pour le Canada :+1 877-MY-SMATech (+1 877-697-6283)

México SMA Solar Technologyde MéxicoMexico City

Internacional: +1 916 625-0870

www.SMA-Solar.com

Documents

Replacement Manual - AUTOMATIC BACKUP UNIT · 6.1.2 Installing the SMA Backup Unit Controller 1. Place the SMA Backup Unit Controller onto the DIN rail from above and hook it in