7.5 KW Battery Charger For Narrow Gauge Coaches
7.5 KW Battery Charger For Narrow Gauge Coaches
Specification No. EDTS 416, REV-0
Description
- 7.5kW constant voltage charger built for narrow gauge SLR coaches with 110V, 300Ah VRLA batteries.
- Provides regulated DC power to coach loads while ensuring efficient battery charging.
- Features current limiting for safe and reliable operation under varying load conditions.
- Underslung, naturally cooled design ensures durability and space-efficient integration in railways
Technical Specifications :
| Type | |
| Charger Type | Constant Voltage |
| Input Voltage | |
| Nominal Voltage | 415 V AC, 3-phase, 3-wire system |
| Operating Range | 415 V ±15%, 50 Hz ±3% |
| THD (Max) | Voltage < 10% |
| Output (DC) | |
| Type | Fully insulated from coach body (+ and – sides) |
| Output Voltage | 122 V ±2% DC |
| Output Current | 60 A max |
| Battery Type & Rating | 110 V, 300 Ah VRLA |
| Efficiency | Greater than 97% at full load |
| Ripple Content | <2% of set Voltage, <3% of set Current |
| Protections | |
| O/P Over Voltage | 136 VDC ±2 V |
| Output Current Limit | 60 A max |
| AC O/V & U/V Protection | Trips at 300 ±5 V / 480 ±5 V; auto-restart; withstands 510 V AC for 2 min |
| Self-reset Feature | Auto restart if trip condition normalizes |
| Earth Leakage | Trip provided for >≈30 mA on +ve/−ve lines |
| IP Protection | IP-67 (dust and water ingress protection) |
| Short Circuit | Trip provided |
| Reverse Polarity | Protection in battery circuits |
| Overload | 22 A for 1 minute |
| Isolation | Galvanic isolation provided |
| Construction | |
| Enclosure | 2 mm thick SS-304/S2 or SS-304/L |
| Dimensions | L: 700 mm, W: 407 mm, H: 470 mm |
| Mounting | 660 × 240 mm |
| Weight | < 150 kg |