Xantrex Technology ACCB-L, ACCB-L-L1 AC Bypass Switch Assembly

Introduction

1–6 973-0031-01-01 Rev A

AC Bypass Switch Assembly

The AC bypass switch assembly in the ACCB-L-L1 is designed for 120 Vac

applications and comes with two 60-amp circuit breakers (one SPST and one

DPST). The breaker pair is equipped with a lockout rocker that allows only one

breaker to be ON at any given time.

The AC bypass switch allows the generator or grid to provide power to the

inverter loads in the event that the inverter is disabled for battery maintenance or

removed for service.

A second AC bypass switch assembly (ACCB-L2-PCK) is available for dual-

inverter installations (ACCB-L-L2 configuration). This field-installed, add-on

package includes pre-cut wires for wiring a second inverter in the lower position

and provides an additional Isolated Hot Bar for optional installation.

For more information see Chapter 3, “Operation” in this guide.

Figure 1-4

Bypass Switch Assembly in the ACCB-L-L1

Factory-installed

AC Bypass Breaker

CAUTION: Equipment Damage

Although it is possible to use the second AC Bypass Switch for a second AC input

(i.e., generator and grid) to the same inverter, using the AC Bypass Switch for this

purpose is not recommended. Switching ON both Bypass switches can cause the two AC

sources to short each other out.

WARNING: Electrical Hazard

If the inverter is removed from service while the bypass is used, live circuits inside the

Long AC Conduit Box will not be guarded from accidental contact. Be sure to install the

Blockoff Plates to prevent accidental electrocution if the inverter is removed from the

system.

Contents

Main Page Page Page About This Guide Purpose Scope Audience Organization Conventions Used The following conventions are used in this guide. Abbreviations and Acronyms Related Information WARNING Important Safety Instructions WARNING Page Contents Important Safety Instructions 1 2 Introduction Page Figures Page Page Page 1 Introduction Page Specifications Operational and Environmental Specifications for the ACCB-L, ACCB-L-L1, and ACCB-L-L2 Figure 1-3 Table 1-1 ACCB-L Dimensions (not to scale) Operational and Environmental Specifications for the ACCB-L, ACCB-L-L1, and ACCB-L-L2 AC Bypass Switch Assembly CAUTION: Equipment Damage WARNING: Electrical Hazard Blockoff Plates Page 2 Preparing for the Installation Code Compliance Installation Tools and Materials Configuration Planning Off-Grid Configurations On-Grid Configurations Pre-Installation Location WARNING ELECT RICAL SHO CK HAZARD Ventilation Requirements Removing and Replacing the Cover Installing or Removing the Blockoff Plates Knockout Preparation Pre-Installation 973-0031-01-01 Rev A 29 Figure 2-6 Knockouts Locations Installing Additional Breakers Mounting Mounting on the Xantrex Back Plate (XBP) Page Mounting on Plywood Wiring - General Accessing the AC Input/Output Terminal Block in the ACCB-L-L1 WARNING: Fire Hazard Wire Sizes and Disconnect Requirements CAUTION: Equipment Damage Installation 216 973-0031-01-01 Rev A Figure 2-11 ACCB-L Approved Internal Components Wiring - General 973-0031-01-01 Rev A 217 Figure 2-12 ACCB-L-L1 Internal Components (Factory installed) Installation 218 973-0031-01-01 Rev A Figure 2-13 ACCB-L-L1 Internal Components with the Optional ACCB-L2-PKG Installed Wiring for Off-Grid Applications Single Inverter Configurations (120 Vac) Page Page Page Page Page Wiring for On-Grid Applications Single Inverter Configurations (120 Vac) Page Page Page Additional Accessory Wiring Page 3 The AC Bypass Switch Operating the AC Bypass Switch Normal Operation Bypass Operation AC Input/Output Off Dual Inverters: 240 Vac Loads Figure 3-4 AC Output OFF WARNING: Fire Hazard Warranty and Return Information Warr anty What does this warranty cover? What will Xantrex do? How do you get service? Disclaimer Product Exclusions Warning: Limitations On Use Return Material Authorization Policy Return Procedure If you are returning a product from outside of the USA or Canada If you are returning a product to a Xantrex Authorized Service Center (ASC) A Xantrex return Out of Warranty Service Information About Your System Index A B C E