Question 1

What are the core electrical output specifications, AC input adaptability, and conversion efficiency of the Huawei ETP48200-C5B7?

Accepted Answer

The Huawei ETP48200-C5B7 is a 5U embedded telecom DC power subrack designed for a nominal system capacity of 200A (up to 12kW continuous output when fully populated with 4x 50A rectifiers). It operates at a nominal -48V DC output, adjustable between -42V DC and -58V DC. The AC input supports a versatile 220V/380V compatible architecture (single-phase 85–300VAC or three-phase input), delivering 100% full-load output between 176–300VAC (with linear derating from 176VAC down to 85VAC). Utilizing Huawei R4850G2 or ultra-efficient R4850G6 rectifier modules, the system achieves a peak efficiency >96%, power factor (PF) ≥ 0.99, and THD ≤ 5%. Controlled via the SMU02B/SMU02C intelligent monitoring unit, voltage measurement accuracy stays within ±0.5%.

Question 2

What are the rectifier compatibility, hot-swap capabilities, and DC distribution expansion mechanisms of the ETP48200-C5B7 subrack?

Accepted Answer

The ETP48200-C5B7 chassis features 4 standardized 50A rectifier slots, natively compatible with Huawei R4850G2, R4850N2, and high-efficiency R4850G6 modules with zero-downtime hot-swappability. Modules communicate via high-speed CAN bus for active digital current sharing with an imbalance rate under ±5%, supporting N+1 redundancy and smart module hibernation for energy optimization. On the DC distribution side, it integrates 2 heavy-duty battery input branches (typically fused at 125A–160A) along with multi-channel load branches routed through Load Low Voltage Disconnect (LLVD) and Battery Low Voltage Disconnect (BLVD) contactors, ensuring prioritized tiered shedding for critical network nodes.

Question 3

How does the system perform regarding extreme environmental tolerance, surge protection ratings, and Low Voltage Disconnect (LVD) battery management?

Accepted Answer

Engineered for harsh telecom edge sites, the ETP48200-C5B7 operates reliably across -40°C to +65°C (with intelligent derating above +45°C) and 5% to 95% non-condensing relative humidity. It integrates robust Class C AC surge protection (differential mode 20kA, common mode 40kA, 8/20μs) and DC side SPD rated at 10/20kA. System battery safety is governed by hardware dual LVD contactors: LLVD prioritizes core telecom gear by shedding auxiliary loads first, while BLVD disconnects the battery string at the safety threshold (e.g., 43.2V) to prevent irreversible deep discharge. Rectifier modules utilize intelligent step-less speed-regulated fans to ensure thermal stability and reduce dust ingress.

Key specifications	Value
AC Input Voltage Range	220V/380V compatible (85~300VAC) VAC
Nominal DC Output Voltage	-48 V DC
System Output Capacity	A
Rectifier Module Slots	4 × R4850G2 / R4850G6 (50A) Slots
Physical Dimensions Spec	222 (5U) × 442 × 360 mm
System Monitoring Controller	SMU02B / SMU02C intelligent monitoring unit

Huawei ETP48200-C5B7 Embedded DC Power Subrack -48V 200A 5U

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