Three-phase industrial rectifier for DABS Substations

NASN POWER Three-phase industrial rectifier battery chargers, specifically designed and

customized to supply constant DC supply (Voltage and Current) to critical loads

(Protection Relay and SCADA RTU’s).

• To recharge any types of rechargeable batteries (for instance: vented or sealed, lead-acid,

Ni-Cd). The three-phase rectifiers, employ a 6-pulse thyristor bridge, fully controlled by

PCB board.

• Limit the output by dropping Diodes

• Isolation transformer and Harmonic filters

• Panel IP and panel thickness: IP20 Indoor, 2mm

• Rectifier efficiency: ≥ 90 %

• AC & DC short circuit current: TBD based on design and below specs.

• Manual & Automatic, but the output voltage can be regulated.

• Rectifier transformer overload capacity: The Max. rectifier capacity

• Type of metering indicators: Both (Analog & Digital)

• Installation type: Indoor

• Type of Earthing: Solidly

Input: -

• 3 phase AC Supply 400VAC ± 20%

• 50Hz ±6%

• Power Factor Approx (0.7-1)

• Isolation transformer

Output: -

• 110VDC Regulated with ± 5% (Adjustable)

• 0-100A

• DC Filter

• Output Ripple voltage Max 5% rms nominal DC voltage

Charging Mode Selector Switch: 

The charging mode should be Automatic and Manual with independently adjustable of charging

via selector switch as;

• Float (Trickle) Charge

• Hi-Rate (Boost) Charge

• Current Limit Setting

• Float and boost Charge Ratting capacity: Adjustable for the batteries with capacity of

(100AH – 600AH)

Slow-Start: 

The Slow Start function is used to prevent high current surge during powering up of the rectifierand the Circuit only operate during the start-up of the rectifier.

Typically, the design is chosen to give the slow-start ramp of 10seconds from start up.

Operation Environment

• Audible Noise 55 dBA @ 1.5m±10%

• Temperature Range -25 ͦC to + 55 ͦC continuous

• Humidity 0 to 95% @ 25 ͦC

• Altitude ≥2000m above sea level.

Cooling System

• Low noise Fan with Air Filter

Protection: 

• AC DC Surge Suppressers

• AC Input Over and Under Voltage Protection

• AC over Current Protection

• DC output Over Voltage Protection

• DC output over Current Protection

• DC Output Earth Fault Protection

Metering: 

• AC Input Voltage Indicator

• AC Input Current Indicator

• DC Output Voltage Indicator (Load)

• DC Output Current Indicator (Load)

• DC Output Voltage Indicator (Batteries)

• DC Output Current Indicator (Batteries)

• Battery Status LED (Rate of Charge)

Multi Alarm system and LED Indications

• Rectifier Normal Operation

• Alarm sounder and Silence button

• AC Input Reverse Phase Sequence LED

• AC Input phase failure and Low Voltage Alarm and LED

• Low Voltage Output Alarm and LED (Adjustable)

• Input and Output MCB or Fuses trip Alarm

• High Temp. Inside the Charger or semiconductor

• Colling Fan has Failed

• Ground Fault "-VE"

• Ground Fault "+VE"

• Charger Fail

Terminal and cabling connections

• Bottom connected

• Separate Terminal Block for the Input, Load and Batteries

Applications

• DABS Substations.

• DABS Junction Stations.