48V Telecom Rectifier Module — Hot-Swappable N+1 for DC Power Systems (25A–100A)
HMR-48V-25…100A
The Hannibal HMR-48V is a 48VDC telecom rectifier module engineered as the power backbone of modern DC power systems, delivering 25A to 100A of stabilized, high-efficiency direct current.
- Nominal DC output
- 48 VDC (53.5V float, adjustable 43–58 VDC)
- Power factor
- ≥ 0.99 at rated input
- Communication
- RS485, TCP/IP, SNMP, GSM, dry contacts
- Output current
- 25A to 100A (modular)
- Redundancy
- Hot-swap, N+1 redundant
- Peak efficiency
- > 96.5%
Overview
The Hannibal HMR-48V is a 48VDC telecom rectifier module engineered as the power backbone of modern DC power systems, delivering 25A to 100A of stabilized, high-efficiency direct current. Based on high-frequency commutated (IGBT) switch-mode technology, it provides the dense, reliable 48V DC that macro-cell BTS, LTE / WiMax, microwave, FTTX, broadband access, optical fibre transmission and Internet Data Centre (IDC) installations depend on.
Hot-swappable modules in an N+1 redundant architecture let the system grow with demand and allow live module replacement, so the 48V DC bus never drops — a true DC UPS for mission-critical telecom and data-centre loads. With peak efficiency above 96.5%, a power factor ≥ 0.99, output ripple and noise ≤ 200mVp-p, and a wide input voltage range for demanding grid conditions, the HMR-48V keeps energy losses and operating costs low. Temperature-compensated charging of VRLA lead-acid batteries, a built-in battery test function, an alarm & event logger with time-stamped memory, and RS485 / TCP / SNMP / GSM communication deliver complete supervision and remote control.
Key features
- 0148VDC modular output, scalable from 25A to 100A for telecom and data-centre DC power.
- 02Functions as a DC UPS / AC-DC converter with hot-swap N+1 redundancy for zero-interruption service.
- 03High-frequency commutated (IGBT) switch-mode modules, fully digital controlled.
- 04Peak efficiency > 96.5% with power factor ≥ 0.99 at rated input.
- 05Low output ripple and noise (≤ 200mVp-p) and tight static voltage regulation (≤ ±0.6%).
- 06Temperature-compensated battery charging, battery test function and intelligent battery management.
- 07Wide input voltage range and wide operating temperature for harsh and remote sites.
- 08RS485, TCP/IP, SNMP, GSM, Ethernet, serial port and dry-contact remote monitoring.
Technical specification
| Power factor | ≥ 0.99 at rated input |
|---|
| Nominal DC output | 48 VDC (53.5V float, adjustable 43–58 VDC) |
|---|---|
| Output current | 25A to 100A (modular) |
| Peak efficiency | > 96.5% |
| Ripple & noise | ≤ 200 mVp-p (20 MHz bandwidth) |
| Battery charging | Temperature-compensated, battery test, intelligent BMS |
|---|
| Communication | RS485, TCP/IP, SNMP, GSM, dry contacts |
|---|
| Rectifier technology | High-frequency commutated (IGBT), switch-mode (SMR) |
|---|---|
| Redundancy | Hot-swap, N+1 redundant |
| Mounting | 19” rack / cabinet |
| Cooling | Forced ventilation, front-to-back airflow |
Applications
- Macro-cell BTS and mobile network base stations.
- LTE / WiMax, microwave and broadband access networks.
- FTTX and optical fibre transmission systems.
- Internet Data Centres (IDC), data centers and server rooms.
- 48V DC backup and uninterrupted power for telecom infrastructure.
Options, standards & platform
Battery compatibility
HMR Series modular rectifiers provide temperature-compensated charging and intelligent battery management for standby battery banks, with built-in LVD protection and battery test:
- Valve-regulated lead-acid (VRLA), AGM and Gel batteries.
- Vented lead-acid and other lead-acid chemistries.
- Compatible with leading battery brands including EnerSys and Exide.
- Battery low-voltage disconnect (LVD), battery test function and room temperature probe as standard.
Options & accessories
- Voltage drop diode unit and digital or analog voltage / current meters.
- Earth leakage current sensor (positive and negative) and door-open sensor.
- Internal cabinet lighting, anti-condensation heating resistance and redundant fans.
- Fusible surge suppression (AC/DC) and removal of input neutral on site.
- Cabinet colour to any RAL code, flexible cable entry (top / side / bottom / rear).
- Ingress protection up to IP66 for outdoor and harsh-environment installations.
- RS485, TCP, SNMP and GSM communication and an automatic battery test option.
Standards & compliance
- Electrical safety: EN / IEC 62368-1.
- EMC: ETSI EN 300 386 V2.1.1 and EN 61000-6-1 / -2 / -3 / -4.
- AC harmonics, flicker and fluctuations: EN 61000-3-2 / EN 61000-3-3.
- CE marked and RoHS compliant.