FLOAT – BOOST CHARGERS DC POWER SUPPLIES
Applications
•Power Stations
•Sub-stations
•Switchgear Stations
•Metal industries,
•Housing Colonies
•Chemical plants
•Electromagnets
•Etc…
Battery Types
•Lead Acid
•VRLA•SMF •Plante
•Nickle Cadmium NiCd
•Tubular Plate •Etc..
Range
•24/30/110/220 VDC
•5 Amps -1500 Amps
•Input 230(1P)/415(3P)
Description
Baid Power Services P. Ltd. is having over 30 years experience in designing and manufacturing various type of Industrial Battery chargers. BPS Industrial Float Chargers are designed to supply constant DC source for continuous load and intermittent DC loads and simultaneously keep the connected batteries in fully charged condition. These are Constant Current – Constant Voltage chargers. Chargers are Transformer based, have full bridge rectifier consisting of SCR / Diode or SCR-SCR modules with phase angle control loop to automatically control charging rate for wide range of batteries. BPS chargers are suitable for all kind of batteries like VRLA, Ni-Cad, Tubular, Plante etc.
Primary functions of a Battery Charger are:
a) To Boost charge the discharged battery ,
b) To float charge the battery to maintain it’s self discharge losses.
c) To supply DC load with Mains ON condition.
While selecting the right type of chargers for specific applications, following points may be considered:
a) Application critically, For critical application, the charger selected must have very high redundancy.
b) Location of installation,For installation at remote locations, high redundancy is required.
c) Type of battery and
d) Cost factor
Technical Specification |
|
|---|---|
| Aux: | : 415V. AC ( 3 Phase) / 240 V (1 Phase)+/- 20 %/ +/- 10%, 50 Hz. +/- 3 Hz. |
| Out put | : 30 V, 48 V, 110 V and 220 V. DC supply |
| Battery Type | : Lead Acid / SMF/PLANTE/ NiCd |
| Indications and instruments | : Indications for 3 phase mains supply |
| : Float / Boost section | |
| : AC Volt meter with selector switch | |
| : DC Volt meter with selector switch and battery volt | |
| : DC Amps meter for load | |
| : DC Amps meter for Charging. | |
| Protection | : MCB for Mains incoming supply |
| : MCB for out put load | |
| : Over load cut out by electronics circuit | |
| : Over Voltage cut-out by electronics circuit | |
| : Single phasing, under voltage for mains | |
| Housing and Enclosure | : Heavy duty Sheet Steel Enclosure Finished with Powder Coated paint. |
| Operation | : Auto/Manual |
| Control | : CC/ CV close loop |
| Rectifier | : Full wave half controlled bridge |
| Optional | : Fuse protection for each rectifier element |
| : Fuse failure relay | |
| : DC Earth Fault Relay | |
| : Alarm Annunciation | |
| : Dual Float Charger option | |
| : Any other as per requirement. | |
Different Charging Schemes with Block
Float Cum Boost charger has single Transformer Rectifier. It has tow mode of operation. If the battery demands current over a set limit, the charger operates under Boost Mode. As soon the battery reaches desired voltage level, it operates under Float mode. When the charger is under Boost mode, load is feed through tape cell or dropping diodes. When it is under Float mode, battery is connected to load directly and floats the battery.This is very cost effective solutions where application is not so critical. VRLA, PLANTE, or Tubular type of batteries can be connected with these chargers.
Float & Boost charger (F&BC) has two Transformers Rectifiers. Float charger is directly connected to load & Boost charger is connected directly to battery. During normal operation, Float charger is on and continues to supply DC load and battery is floated with it. If battery is discharged and demands current over a set limit, the Boost charger is switched on. Boost charger is switched off automatically on battery reaching desired voltage level. During Boost operation, the battery is connected to load through tapped cell and diode. In the event of Mains failure or changeover, DC contractor is used to short the diode thus connected the battery directly.This is reasonably prices & effective solutions where application is not very critical. VRLA, PLANTE, or Tubular type of batteries can be connected with these chargers.
Float & Float cum Boost charger (F & FBC) also has two Transformers Rectifiers. Float charger is directly connected to load & Float cum Boost charger is connected directly to battery. During normal operation, Float charger is on and continues to supply DC load and battery is floated with it. If battery is discharged and demands current over a set limit, the Float cum Boost charger is switched on. Float cum Boost charger is switched off automatically on battery reaching desired voltage level. During Boost operation, the battery is connected to load through tapped cell and diode. In the event of Mains failure or changeover, DC contractor is used to short the diode thus connected the battery directly.Added advantage is that on failure of main Float charger, Float Cum Boost charger charges the battery and simultaneous supply the dc load.This is moderately priced & effective solutions where application requires redundant float system. VRLA, PLANTE, or Tubular type of batteries can be connected with these chargers.
This type of Chargers has two independent Float cum Boot Chargers housed in one cabinet. It is fully redundant system and flexible charger. Each charger can be set to work as Float charger and each charger can work as Boost charger. In auto mode, on when battery need Boost charging, any charger can be pre-selected to work as Boost charger and other charger will automatically work as Float mode. Charger selected for Boost is disconnected from Load. After completion of boost charging, the charger will be automatically connected to load thus both the charger and battery is in parallel mode.This type of charger is required for most critical systems where high redundancy is required. These are also recommended for remote installations. Prices of this type of charger is on higher side.
