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0 DC POWER ANALYSIS

4G3 EARLY START PROJECT

Site no.: ZRN984 Date : April 18, 2023

Region : CENTRAL

U900+G900 COMBINEDLoad 0 + 6 + 6 + 6 :

2517.00Watts

Load 0 + 1 + 1 + 1 : Watts

3G 2100 Load 0 + 4 + 4 + 4 : 2426.00 Watts

LTE1800 Load 0 + 1 + 1 + 1 : 1655.00 Watts

LTE2300 Load 0 + 1 + 1 + 1 : 1456.00 Watts

TRM : 300.0 Watts

Battery Rating 300 Ah

Rectifier Size 65 Amperes

TOTAL REQUIRED POWER BY 0 SYSTEM : 8354.00 Watts

Plus 8% battery charging 8354.00 W x 1.08 : 9022.32 Watts

RECTIFIER CALCULATION

Total required current by the equipment 9022.32 / 54 Volts : 167.08 Amperes

No. of required rectifiers 167.08 A / 65 A : 2.57

say : 3.00 Units

Total no. of required rectifiers including

standby and future loads ( n + 1 ) : 4 Units

BATTERY STRING CALCULATION

Total demand load : 8354.00 Watts

Total current requirement by the equipment

from the battery system 8354.00 W / 48.0 Volts : 174.04 Amperes

No.of 300 AH battery string to meet the above requirement

4 hours = 174.04 / 60 = 2.90 : 2 Strings

STC STANDARD

REQUIRED DC POWER UNITS

Required Rectifiers 65 Ampere : 4 Units

Required Battery Strings 300 Ampere Hour : 2 Strings

EXISTING DC POWER UNITS

Existing Rectifiers 65 Ampere : 3 Units

Existing Battery String 300 Ampere Hour : 2 Strings

MISSING DC POWER UNITS

Missing Rectifiers 65 Ampere : 0 Units

Missing Battery String 300 Ampere Hour : 0 Strings

ADDITIONAL DC POWER UNITS

Additional Rectifiers 65 Ampere : 1 Units

Additional Battery String 300 Ampere Hour : 0 Strings

With 2 x 300 AH battery strings, battery back up time of 2.76 hours can be achieved.

Type of existing + NEW rectifier : 4 x 65 A 0

Type of existing + NEW battery String : 2 x 300 AH 0

Maximum number of rectifier modules can be installed : 9

NOTE: Therefore install new 1 0

in order to adequetely carry the loads.

No. of Rt's ERICSSON RBS6201

rectifier modules and battery strings to DC powerplant