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ZTE / DC Power Systems (-48V)

PSU-AC Equipment information & support

The ZTE PSU-AC is an integrated AC distribution and switching power subrack engineered for outdoor telecom shelters, transmission towers, and cellular macro sites, featuring automatic mains transfer and robust lightning protection.

Equipment information

Brand
ZTE
Equipment model
PSU-AC
Equipment type
DC Power Systems (-48V)
Controller / software version
Confirm against the installed equipment
View full product specifications
ZTE PSU-AC Embedded Power Supply System (AC Distribution & Outdoor Power Subrack) - Official Front View

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated Distribution Capacity
30A - 50A / 10kW Modular
AC Input Voltage
85V - 290V AC Wide Tolerance
Chassis Form Factor
Compact Plug-in Power Supply Module for BBU/Basestations
Surge Protection Class
Class C / 20kA Nominal, 40kA Max
Output Branch Distribution
Multiple AC/DC Circuit Breakers
Ingress Protection Rating
IP20 (Outdoor Shelter Integration)

Alarms & troubleshooting

MAINS_FAIL / AC_POWER_LOSS
Power distribution Amber LED solid, controller buzzer active
Mains utility grid failure, upstream transformer trip, or main AC breaker open
1. Verify battery discharge current and remaining backup runtime on monitor;\n2. Start standby generator (DG) and confirm transfer switch closure;\n3. Measure incoming 3-phase AC voltage and frequency stability;\n4. After grid recovery, verify rectifiers soft-start and initiate boost charging.
LLVD_TRIP / LOAD_SHEDDING
Controller screen displays LLVD alarm, DC load contactor opened
Prolonged blackout caused battery voltage to drop below threshold (44.0VDC default), shedding non-critical loads
1. Confirm priority telecommunication loads on BLVD branch remain powered;\n2. Deploy mobile emergency power generators to replenish battery plant;\n3. Upon grid restoration, observe DC bus rising past reset threshold (48.0VDC);\n4. Verify all load shedding contactors re-engage and resume service.
SPD_FAIL / SURGE_ARRESTOR
Surge arrestor inspection window turns Red from Green, alarm relay closed
Lightning induced transient surge or utility overvoltage caused MOV thermal breakdown and disconnection
1. Inspect visual disconnect indicator window on AC surge protector module;\n2. Verify upstream SPD backup fuse or miniature circuit breaker status;\n3. Open SPD circuit breaker and pull out damaged plug-in cartridge;\n4. Insert genuine replacement cartridge (20kA/40kA rating) and reset breaker.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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