Q: How does the ZXDU58 W121 withstand harsh operational environments, and what are its surge and battery protection mechanisms?

Engineered for robust enterprise applications, the system operates across -25°C to +65°C ambient temperatures (with linear derating starting above +55°C) utilizing speed-regulated forced-air cooling. It integrates Class C AC surge protection (Nominal In: 20kA, Max Imax: 40kA, 8/20μs surge waveform) against severe grid transients. For DC integrity, the distribution section features dual-stage Low Voltage Disconnect: LLVD (Load Low Voltage Disconnect for shedding non-critical loads) and BLVD (Battery Low Voltage Disconnect preventing catastrophic deep discharge), combined with CSU-driven precision battery thermal compensation.

Question 1

What are the core electrical specifications and power efficiency metrics of the ZTE ZXDU58 W121 DC power subrack?

Accepted Answer

The ZTE ZXDU58 W121 is a 3U 19-inch rack-mount -48V DC power system engineered for continuous output currents up to 120A. It features an ultra-wide AC input operating window of 85VAC to 290VAC (linear derating applies between 85VAC and 176VAC; full rated output between 176VAC and 290VAC, 45–65Hz). The DC output voltage is continuously regulated between -42V and -58V DC. Configured with high-efficiency rectifiers (such as ZXD1500 or ZXD2400 modules), system peak conversion efficiency exceeds 96%, with a power factor (PF) ≥0.99 and total harmonic distortion (THD) ≤5%, ensuring optimal thermal stability and energy conservation across telecommunication loads.

Question 2

What are the module slot compatibility, expansion architecture, and current-sharing capabilities of ZXDU58 W121?

Accepted Answer

Featuring standard 19-inch 3U dimensions (132mm H × 482mm W × 360mm D), the subrack accommodates either 4 × ZXD1500 (30A/unit) or 3 × ZXD2400 (50A/unit configured for capacity) rectifier module slots. Rectifiers support live hot-swapping and active autonomous current sharing with imbalance limited to <±5%. The architecture integrates an intelligent ZTE CSU-series supervisor via internal CAN/RS485 communication bus, enabling automated module topology discovery, autonomous cycle sleep-mode energy efficiency management, and precision bus telemetry without system disruption.

Question 3

How does the ZXDU58 W121 withstand harsh operational environments, and what are its surge and battery protection mechanisms?

Accepted Answer

Engineered for robust enterprise applications, the system operates across -25°C to +65°C ambient temperatures (with linear derating starting above +55°C) utilizing speed-regulated forced-air cooling. It integrates Class C AC surge protection (Nominal In: 20kA, Max Imax: 40kA, 8/20μs surge waveform) against severe grid transients. For DC integrity, the distribution section features dual-stage Low Voltage Disconnect: LLVD (Load Low Voltage Disconnect for shedding non-critical loads) and BLVD (Battery Low Voltage Disconnect preventing catastrophic deep discharge), combined with CSU-driven precision battery thermal compensation.

Key specifications	Value
AC Input Voltage Range	85VAC ~ 290VAC VAC
Nominal DC Output Voltage	-48 V DC
System Output Capacity	A
Rectifier Module Slots	4 × ZXD1500 / 3 × ZXD2400 Slots
Physical Dimensions Spec	132 (3U) × 482 × 360 mm
System Monitoring Controller	CSU series intelligent monitoring controller

ZTE ZXDU58 W121 Embedded DC Power Subrack -48V 120A 3U

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