Liebert 4000, 3000, 6000 A, 1500 4.4Rectifiers, 4.5AC Junction Box, 4.6Distribution Panels

4.4Rectifiers

The rectifiers provide isolated, filtered and regulated DC power, from either a single-phase AC source (Helios Rectifier 100/48) or a three-phase AC source (Helios Rectifier 200I/48 or 200E/48), for charging a positive grounded battery.

The nominal output is adjustable over the range of -46 to -59.5 V to float a 23 or 24 cell battery string.

The rectifiers are equipped with AC input and DC output circuit breakers, a digital ammeter, potentiometers for the adjustment of thresholds, and LED indicators for alarm indications.

The rectifiers use high frequency switching technology and forced air-cooling.

Refer to the appropriate rectifier user manual listed in 6.0 - Reference Documents for detailed operation information on the Helios Rectifier 100/48, the Helios Rectifier 200I/48, or the Helios Rectifier 200E/48.

4.5AC Junction Box

! WARNING

PREVENTING ELECTRICAL SHOCKS

WHEN OPENING THE DOOR OR WIRING THE AC INPUT OF THE RECTIFIERS INSIDE THE JUNCTION BOX, ENSURE THAT THE ASSOCIATED AC BREAKERS, LOCATED IN THE AC SERVICE PANEL, ARE IN THE OFF POSITION AND THAT A WARNING TAG CLEARLY INDICATES THAT THESE BREAKERS ARE TO REMAIN OFF UNTIL THE AC WIRING HAS BEEN COMPLETED. DO NOT INSERT FUSES, OR OPERATE CIRCUIT BREAKER OR SWITCHES TO ON UNTIL THE WIRING IS COMPLETED AND YOU ARE INSTRUCTED TO DO SO.

The AC junction box is part of the rectifier cabinet used for the Helios Rectifier 200E/48. It is located at the top of the cabinet for top fed systems, or at the bottom of the cabinet for bottom fed systems.

The AC junction box provides AC connection interface for up to six rectifiers and facilitates the addition and/or replacement of rectifiers in a working system. The AC supply from the AC service panel is hard wired inside the box at the time of the initial installation. Detailed cabling and con- necting guidelines for the AC junction box can be found in 5.0 - Maintenance.

The rectifiers are provided with a factory-installed AC cord equipped with a male connector. This male connector is plugged into a matching female receptacle at the rear of the AC junction box. For the complete procedures for adding or replacing a rectifier, refer to 5.0 - Maintenance. Note that caps are provided to protect the unused female receptacles.

4.6Distribution Panels

All distribution panels provide local alarm indication on the panel itself, and alarm extension to the controller for additional indication on the controller and the cabinet and further extension to remote alarm facilities.

4.7Terminating Assemblies (Optional)

Terminating assemblies are optional devices used to facilitate the connecting of loads to distribu- tion fuses or circuit breakers larger than 199 A. These assemblies can be used in top fed systems only (they cannot be used on bottom fed systems). Each terminating assembly provides connection facilities for up to six loads without having to route the cables inside the cabinet during installa- tion.

Two terminating assemblies can be used on an auxiliary distribution cabinet, while only one ter- minating assembly can be used on a main control and distribution cabinet.

Operation 35