Question 1

What are the rated output capacity, grid adaptability, and conversion efficiency specifications of the Huawei EPS200-4850A?

Accepted Answer

The Huawei EPS200-4850A (SKU: HW-SYS-EPS200-4850A) is a 5U 19-inch subrack DC power system delivering a maximum output of 200A (approx. 12kW) with 4 hot-swappable 50A rectifier slots at nominal -48VDC (adjustable from -42VDC to -58VDC). It supports an ultra-wide AC input range of 85–300VAC (adaptive to single-phase 220VAC or three-phase five-wire 380V/220VAC), maintaining 100% full-load output between 176–300VAC and linear derating between 85–176VAC. Fitted with R4850G rectifiers, the system achieves >96.0% peak conversion efficiency with THD ≤ 5% and power factor PF ≥ 0.99, minimizing operational heat dissipation and optimizing site PUE.

Question 2

Which rectifier modules are compatible with the EPS200-4850A 5U subrack, and how does the active current-sharing mechanism operate during expansion?

Accepted Answer

The EPS200-4850A chassis natively supports Huawei R4850-series 50A rectifiers, including R4850G (high efficiency, >96%) and R4850N (standard efficiency, >94%). Utilizing an internal high-speed CAN bus, all rectifier slots support true hot-plugging without service interruption. The SMU02B/SMU02C supervisory unit executes autonomous digital active current-sharing, keeping the current imbalance between parallel rectifiers within ±5%. It accommodates mixed deployments of R4850 modules across different revisions, dynamically coordinating load management and intelligent module cycling for maximized operational life and energy savings.

Question 3

How does the EPS200-4850A ensure system reliability under harsh site conditions regarding ambient temperature, surge suppression, and battery protection?

Accepted Answer

The EPS200-4850A is engineered for harsh operating environments, certified for ambient temperatures from -40°C to +65°C (with intelligent thermal derating above 55°C) and 5% to 95% relative humidity (non-condensing) within an IP20 subrack. Surge protection features integrated Class C AC SPDs (nominal 20kA, maximum 40kA at 8/20μs) alongside 10/20kA DC surge suppression. Battery management incorporates dual-stage disconnect contactors—LLVD (Load Low Voltage Disconnect for non-critical drops) and BLVD (Battery Low Voltage Disconnect to prevent irreversible deep discharge)—regulated by SMU thermal compensation and intelligent boost-charge algorithms.

Key specifications	Value
System Output Capacity	200 A
Nominal Output Voltage	-48 VDC
Output Voltage Range	-42 ~ -58 VDC
Rectifier Module Slots	4 slots (compatible with R4850G / R4850N high-efficiency rectifiers)
System Comprehensive Efficiency	> 96.0%
Physical Dimensions Spec	222 × 482 × 330 mm (5U 19-inch)
Ingress Protection (IP Rating)	IP20 embedded 5U rack-mount design
AC Input Voltage Range	85 ~ 300 VAC (three-phase five-wire / single-phase auto-adaptive)
System Monitoring Controller	SMU02B / SMU02C intelligent LCD monitoring unit
Operating Temperature	-40°C to +65°C

Huawei EPS200-4850A Embedded Telecom DC Power System (-48V 200A 5U)

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What this product is

What problem it solves

Who and where it is for

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Technical specifications

Applications

Cellular macro site indoor equipment cabinets

Metropolitan transport optical aggregation rooms

Railway signaling and power grid substations

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