125V DC Rectifier Module — Hot-Swap N+1 for Substation & Switchgear (25A–100A)
HMR-120V-25…100A
The Hannibal HMR-120V is a 125VDC modular rectifier and battery charger that provides a stabilized 25A to 100A DC supply for switchgear, substations and utility control systems.
- Nominal DC output
- 125 VDC (field-adjustable)
- Battery protection
- LVD, output breakers, battery test
- Communication
- RS485, TCP/IP, SNMP, GSM, dry contacts
- Output current
- 25A to 100A (modular)
- Battery charging
- Temperature-compensated, intelligent BMS
- Redundancy
- Hot-swap, N+1 redundant
Overview
The Hannibal HMR-120V is a 125VDC modular rectifier and battery charger that provides a stabilized 25A to 100A DC supply for switchgear, substations and utility control systems. Its high-frequency commutated (IGBT) switch-mode modules deliver high efficiency and high power density in a compact 19” rack or cabinet, and combined with a stand-by battery they form a dependable DC power supply that protects critical 125V control and protection loads.
Hot-swappable modules in an N+1 redundant arrangement allow live replacement and keep mean time to repair low, while fully digital control reduces component count and improves reliability with an MTBF exceeding 300,000 hours. Built-in intelligent battery management, temperature-compensated charging, a battery test function and a battery low-voltage disconnect (LVD) maximise battery health, and a time-stamped alarm & event logger records every event. Operators configure and calibrate all parameters from the front-panel HMI, with RS485, TCP, SNMP and GSM communication for full remote supervision.
Key features
- 01125VDC modular output, scalable from 25A to 100A for switchgear and utility DC.
- 02High-frequency commutated (IGBT) switch-mode modules with hot-swap N+1 redundancy.
- 03Fully digital control for fewer components, higher reliability and MTBF > 300,000 hrs.
- 04Built-in intelligent battery management with temperature-compensated charging and battery test.
- 05Battery low-voltage disconnect (LVD) and output breakers for loads.
- 06Time-stamped alarm & event logger and full front-panel HMI for setting and calibration.
- 07Peak efficiency > 96% with active current sharing across modules.
- 08RS485, TCP/IP, SNMP, GSM, Ethernet, serial port and dry-contact monitoring.
Technical specification
| Nominal DC output | 125 VDC (field-adjustable) |
|---|---|
| Output current | 25A to 100A (modular) |
| Peak efficiency | > 96% |
| Battery protection | LVD, output breakers, battery test |
|---|---|
| Battery charging | Temperature-compensated, 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 |
| Reliability | MTBF > 300,000 hrs @ 25°C |
| Mounting | 19” rack / cabinet |
| Cooling | Forced ventilation, front-to-back airflow |
Applications
- Switchgear and protection relay DC supplies.
- Substations and utility control rooms.
- Power generation auxiliary systems.
- SCADA and grid-automation systems.
- Backup DC supply for critical 125V loads.
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.