Schaefer B2591-7 | 13.7Vdc | 400W | AC/DC Battery Charger | Chassis Mount
The Schaefer B2591-7 is a chassis-mounted battery charger designed for railway signalling and level crossing applications, where reliability and long-term service life are essential. Holding ARTC Type Approval (Certificate No. NESA-S061), this model is widely deployed across Australian rail networks as a trusted DC charging source for critical i...
Read MoreThe Schaefer B2591-7 is a chassis-mounted battery charger designed for railway signalling and level crossing applications, where reliability and long-term service life are essential.
Holding ARTC Type Approval (Certificate No. NESA-S061), this model is widely deployed across Australian rail networks as a trusted DC charging source for critical infrastructure. The unit supports parallel and redundant operation, incorporating built-in decoupling diodes and active current sharing to maintain balanced load distribution and ensure uninterrupted service in multi-charger configurations.
With natural convection cooling for silent operation, comprehensive electrical protection, and rugged construction suited to rail environments, the B2591-7 delivers dependable performance in demanding field conditions.
It is also the recommended replacement for legacy Enatel RW512 / RW312 Series chargers, providing a proven, locally supported upgrade path for existing installations.
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Features
- ARTC Type Approved – Certificate No. NESA-S061 for signalling and level crossing applications.
- Recommended replacement for EOL Enatel RW512 / RW312 Series battery chargers.
- Natural convection cooling – no fans, reducing potential failure points and increasing long-term reliability.
- High-temperature operation up to 75 °C for stable performance in signalling and equipment huts.
- Chassis-mounting design – Simple installation with easily accessible wiring terminals.
- Supports parallel and redundant operation with active current sharing for load balancing and system redundancy.
Specifications
| INPUT | |
|---|---|
| Voltage Range | 115V AC ±20% or 230V AC +15%/-20% (Auto-Ranging), unit switches off at under and overvoltage |
| Frequency | 50/60Hz |
| Recommended Input Fuse / MCB | External, 10A time lag / K-characteristic related to MCB`s manufactured by ABB |
| No-load Input Power | Approx. 6W |
| Switch-on Time | 300ms typical |
| Inrush Current | Limiting by thermistor |
| OUTPUT | |
|---|---|
| Voltage | 13.7V DC (adjustable 12 … 16V DC) |
| Current | 23A |
| Line Regulation (±10%) | 0.1 % |
| Load Regulation (10-90%) | < 2% |
| Efficiency at Full Load | Approx. 85% |
| Switching Frequency | Approx. 33 kHz |
| Ripple | ≤ 1% +30mVp-p |
| Load Transient (10-90-10%) | 6 % typical |
| Response Time to ±1 % | 2ms typical |
| Turn-on Rise Time | Softstart, 300ms typical |
| Overload Protection | Current limited to 105 ... 110 % of full load |
| Overvoltage Protection | OVP switches off the module at Uout = 18V (with automatic return to operation) |
| Remote Sensing | Internally connected to the output |
| Redundant Operation | Via installed decoupling diode in the (+) output line |
| Parallel Operation | Includes Current Sharing with Interrupt in case of faulty unit in parallel operation |
| MECHANICAL | |
|---|---|
| Mounting Type | Chassis Mount |
| Connector Type | Phoenix Contact |
| Dimensions | 117.5 x 106 x 232.50mm (WxHxD) |
| Weight | Approx. 3.0 kg |
| Increased Mechanical Strength | For shock and vibration in accordance with EN61373 |
| Protection Category | Acc. to IP20 |
| Mounting Instructions | Only in provided position (cooling fin vertical). Above and below the unit at least 40mm distance to neighbouring parts. |
| ENVIRONMENTAL | |
|---|---|
| Cooling | Natural Convection |
| Humidity | Up to 95% RH, non-condensing |
| Temperature Coefficient | 0.02 %/°C typical |
| Operating Temperature | -20°C to +75°C |
| Internal Temperature | Switch 90°C heatsink temperature for emergency power off |
| Load Derating | 2.5 %/°C from +55°C |
| Storage Temperature | -40°C to +85°C |
| ALARMS / MONITORING | |
|---|---|
| Charger Failure | Indicating with relay |
| DC-OK with Relay (output voltage monitoring) | Switching threshold: UOUT>12.3VDC |
| RELIABILITY | |
|---|---|
| MTBF | Approx. 100.000 h at 40°C (in acc. to MIL-HDBK-217E Notice 1) |
| SAFETY & STANDARDS | |
|---|---|
| Safety / Construction | Acc. to to EN/IEC 61010-2-201 + EN/IEC 61010-1 |
| Earth Leakage | < 3.5mA, acc. to EN/IEC 61010-2-201 + EN/IEC 61010-1 |
| EMC Compatibility | Acc. to EN 61000-6-2 / EN 61000-6-4 / EN61000-4-4 / EN61000-4-5 |
| Safety Class | 1 (equipment with protective earth connection) |
| Overvoltage Category | II |
| Pollution Degree | 2 |
| Maximum Installation Altitude | 2000m |
| Isolation Resistance | > 10 MΩ at 500V DC |
| Isolation Test | Acc. to EN/IEC 61010-2-201 + EN/IEC 61010-1 |
Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.