(I) Product Overview:

Shanben Power AC-DC24V/48V series power modules adopt advanced high-frequency pulse width modulation technology, which greatly improves efficiency. The whole machine has the characteristics of high voltage stabilization accuracy, fast dynamic response, low output noise, strong anti-interference ability, and wide operating temperature range. N+1 module combination structure, each module can automatically balance the current and supply power, and can form a high-frequency switching power supply system for telecommunications, power and wireless base stations.

(II) Technical parameters:

ü Input voltage: single-phase three-wire AC: 220V +20% -20%

ü Input current: ≤8A (RMS) when AC input is 220V and DC output is 48V

ü Frequency: 50Hz+10%

ü Power factor: ≥0.99

ü Efficiency: ≥0.87

ü Starting impact current: ≤150%Imax (at rated input)

ü Input protection: input high-fusing capacity fuse protection and rectifier input end is equipped with lightning protection and voltage surge suppression circuit

ü Input overvoltage shutdown: 265--275V

ü Input undervoltage shutdown: 160--170V

ü AC input range: 160--270V

ü Output DC voltage: -48VDC (42∽58V), adjustable

ü Rated current: 10A, 20A, 25A, 30A

ü Output current limit: Ie+1A

ü Voltage regulation: Voltage regulation does not exceed +0.1% of the DC output setting value

ü Load regulation: not more than +0.5% of the DC output setting value

ü Voltage regulation accuracy: not more than +0.5% of the DC output setting value

ü Telephone weighing noise: ≤0.5mV

ü Peak-to-peak noise: ≤150mV

ü Broadband noise voltage: ≤30 mV (3.4KHZ--150KHz)

≤20 mV (150KHZ--30MHz)

ü Discrete frequency noise voltage:  ≤5 mV (3.4KHZ--150KHz)

≤3 mV (150KHZ--200KHz)

≤2 mV (200KHZ--500KHz)

≤1 mV (500KHZ--30MHz)

ü Average flow: ≤+5%

ü Display accuracy: ≤+5%

ü Soft start time: 3--8 seconds

ü Temperature coefficient: not more than +0.2% of DC output setting value

ü Insulation resistance: ≥10MΩ (at room temperature)

ü Insulation strength: AC 1500V/50Hz applied to input to ground and input to output, AC 500V/50Hz applied to output to ground, no flashover or breakdown for 1 minute.

ü Electromagnetic compatibility: in compliance with the requirements of the Ministry of Information Industry YD/T983-1998 standard

(III) Models are:

SP-4805  SP-4810   SP-4815  SP-4820  SP-4825  SP-4830  SP-4850

SP-2405  SP-2410   SP-2420  SP-2430  SP-2440  SP-2450

     （Example: SP-4810 48 means DC voltage is 48V 10 means output current is 10A）

The following figure shows the communication power cabinet: