NATIONAL ALUMINIUM COMPANY LIMITED - Rites

9. Continuous load/duration : As per requirement
Battery chargers
1. Number required
: 2 nos. (1 FC + 1 FCBC)
2. Type
: Static
3. Method of charging
: Float and boost charge type
4. DC system voltage
: To suit the system
5. Automatic voltage regulator required(AVR) : Yes
6. Regulation with AVR
: +/-1%
7. Permissible harmonics at rated continuous load : +/ +/-2%
8. D.C. load requirement
a) Momentary : As per requirement
c) Continuous : As per requirement
b) Emergency : As per requirement
9. Maximum time for boost charging : 8 Hours
Inverters
1. Type
: Static
2. Suitable for parallel oper : suitable for parallel operation
3. Service
: Indoor
4. Output rating
: As required
5. Output Voltage
: 240 V A.C.
6. Phase
: Single phase
7. Frequency
: 50 Hz
8. Total harmonic content
any single harmonic.
: 5% RMS maximum not more than 3% distort distortion in
9. Duty
: Continuous.
10. Overload capacity
: 125% for 15 minute at 0.8 p.f
11. Efficiency
: Not less than 80% at rated load
12. Cooling
: Natural air cooled
13. Synchronization with source : Yes
Static transfer switch
1. Capacity Continuous
2. Type
3. Voltage
4. Frequency
5. Transfer time
Manual bypass switch
1. Capacity Continuous
2. Type
3. No. of positions
4. Short time rating
5. Transfer
Technical Specification:Sec-6, Electrical
: Make and carry F.L. current of inverter at 0.8 p.f.
: Make before break
: 240V, single phase
: 50 Hz
: 1/4 cycle maximum
: Make and carry F.L. current of inverters at 0.8 p.f.
: Make before break.
: 4
: Short time rating of the inverter for 1Sec & 150% of full load
current for 2 minutes.
: Manual.
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