Psu DC 31 2954 PDF [PDF]

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EAB/ FJG/YP ( Louise Cederlund)

Date

Rev

2007-11-27

D

Reference

PSU-DC-31 and PSU-AC-31 Unit Description Copyright © Copyright Ericsson AB 2006 2007. All rights reserved.

Disclaimer No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document. Contents

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Page

1 1.1 1.2 1.3 1.4 1.5 1.6

PSU-DC-31 Unit Description .. .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Product Overview ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Dimensions .. .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Power Consumption and Heat Generation . .. ... ... .. ... .. ... ... .. ... .. ... ... .. Function Description .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Interfaces . ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Revision Information .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... ..

2 2 3 3 3 4 5

2 2.1 2.2 2.3 2.4 2.5

PSU-AC-31 Unit Description .. .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Product Overview ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Dimensions .. .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Power Consumption and Heat Generation . .. ... ... .. ... .. ... ... .. ... .. ... ... .. Function Description .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. Interfaces . ... .. ... ... .. ... .. ... ... .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ... ... ..

5 6 6 7 7 8

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2007-11-27

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PSU-DC-31 Unit Description The PSU-DC-31 is a variant of the Power Supply Unit (PSU) that converts DC to DC (PSU-DC).

PSU DC

Output +27.2 VDC 1500 W

Fault Operational Observation

Alarm/ Control

Input -48/-60 VDC 45 A

P015622B

Figure 1

1.1

PSU-DC-31

Product Overview The PSU-DC converts incoming DC power ranging from 40 V DC to 72 V DC to the regulated DC voltage of +27.2 V DC. The maximum output power is 1,500 W.

1.1.1

Main Functions The PSU DC: •

Supplies the correct DC voltage to the RBS

•

Sends alarms to the Distribution Switch Unit (DXU)

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•

1.2

Date

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2007-11-27

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Reference

Indicates local alarms

Dimensions The table below shows the physical characteristics of the PSU-DC. Table 1

1.3

PSU-DC Size and Weight

Height

Width

Depth

Weight

267 mm

61 mm

226 mm

4.5 kg

(6HE × 44.45 mm)

(12TE × 5.08 mm)

Power Consumption and Heat Generation The table below shows the power consumption and heat generation. Table 2

1.4

Power Consumption and Heat Generation

Maximum Power Consumption

Maximum Heat Generation

1,724 W

224 W

Function Description The PSU-DC consists of the following main units:

1.4.1

•

Input filter, Electromagnetic Compatibility (EMC) filter

•

DC-to-DC converter

•

Output filter, EMC filter

•

Control and supervision circuits

Input Filter The incoming voltage first passes through the input filter (EMC filter), where it is filtered to prevent unwanted signals from being radiated from the PSU-DC.

1.4.2

DC/DC Converter The DC/DC converter is a switch mode converter that converts the DC voltage into a square wave. This is then fed into the primary side of the transformer. The converter limits the current in overload situations. In the transformer, the voltage is converted to a 24 V AC square wave. This wave is rectified to DC voltage through a diode rectifier.

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The output provides constant power regulation, rather than the more common current limited regulation, and delivers 1,500 W over the output voltage.

1.4.3

Output Filter The output filter (EMC filter) filters the output voltage to prevent the radiation of unwanted signals from the PSU-DC.

1.5

Interfaces

1.5.1

Signal and Power Interfaces Input Data The table below shows the input data for the PSU-DC. Table 3

Input Data

Characteristic

Value or Quantity

Nominal input voltage

48 or

60 V DC

Input voltage range

40 to

72 V DC

Non-destructive voltage

0 to

80 V DC

Output Data The table below shows the output data for the PSU-DC. Table 4

Output Data

Characteristic

Value or Quantity

Default output voltage

+27.2 V DC

Output power

1,500 W

Connectors Table 5

Connectors

Function

Connector Type

Power output

2-Pole DC power connector

Alarm/control bus

RJ-45

Power input

2-Pole DC power connector

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1.5.2

Date

Rev

2007-11-27

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Reference

Operator Interface Indicators The table below shows the indicators for the PSU-DC. Table 6

1.6

PSU-DC Indicators

Indicator

Color

Fault

Red

Operational

Green

Observation

Yellow

Revision Information Other than editorial changes, this document has been revised as follows:

2

•

Updated figure ’PSU-DC-31’ due to changes in the label for the input connector.

•

Updated the input voltage data in section ’PSU-DC-31 Unit Description’.

PSU-AC-31 Unit Description The PSU-AC-31 is a variant of the Power Supply Unit (PSU) that converts AC to DC (PSU-AC).

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Date

Rev

2007-11-27

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Reference

PSU AC

Output +27.2 VDC 1520 W

Fault Operational Observation

A1

A2 Alarm/load sharing

Input 45-65Hz 200-250Vac

P015962A

Figure 2

2.1

PSU-AC-31

Product Overview The PSU-AC converts incoming AC power ranging from 200 to 250 V AC to the regulated DC voltage of +24 V DC. The maximum output power is 1,520 W.

2.1.1

Main Functions The PSU-AC:

2.2

•

Communicates with the DXU.

•

Adjusts voltage

•

Performs sharing between parallel units

•

Indicates local alarms

Dimensions The table below shows the physical characteristics of the PSU AC.

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Table 7

2.3

Date

Rev

2007-11-27

D

Reference

PSU-AC Size and Weight

Height

Width

Depth

Weight

267 mm

61 mm

226 mm

4.5 kg

(6HE × 44.45 mm)

(12TE × 5.08 mm)

Power Consumption and Heat Generation The table below shows the power consumption and heat generation. Table 8

2.4

Power Consumption and Heat Generation

Maximum Power Consumption

Maximum Heat Generation

1,700 W

183 W

Function Description The PSU-AC consists of the following main units:

2.4.1

•

Input filter, EMC filter

•

Bridge

•

Booster converter

•

AC/DC converter

•

Output filter, EMC filter

•

Control and supervision circuits

Input Filter The incoming sine voltage first passes through an internal fuse and then the input filter (EMC filter), where it is filtered to prevent unwanted signals from being radiated from the PSU-AC.

2.4.2

Bridge The bridge rectifies the incoming AC.

2.4.3

Boost Converter The boost converter draws a sinusoidal input current in phase with the input voltage, enabling the power supply to have a high power factor and low distribution on input current. The output from the boost converter is +400 V AC.

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Date

Rev

2007-11-27

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Reference

AC/DC Converter The AC/DC converter is a phase-shifted, soft-switched, full-bridge converter that converts the incoming 400 V AC to +24 V DC output voltage. The output provides constant power regulation, rather than the more common current–limited regulation, and delivers 1,520 W over the full input range.

2.4.5

Output Filter The output filter (EMC filter) filters the output voltage to prevent the radiation of unwanted signals from the PSU-AC.

2.5

Interfaces

2.5.1

Signal and Power Interfaces Input Data The table below shows the input data for the PSU-AC. Table 9

Input Data

Characteristic

Value or Quantity

Nominal input voltage

+200 to +250 V AC

Frequency

45–65 Hz

Non-destructive voltage

0 to+275 V AC

Output Data The table below shows the output data for the PSU-AC. Table 10

Output Data

Characteristic

Value or Quantity

Nominal output data

+24 V DC

Default output voltage

+27.2 V DC

Voltage range

+22.0 to +29.0 V DC

Output power

1,520 W

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2007-11-27

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Reference

Connectors Table 11

2.5.2

Connectors

Function

Connector Type

Power output

2-Pole DC power connector

Alarm/control bus

RJ-45

Power input

3-Pole AC power connector

Operator Interface Indicators The table below shows the indicators for the PSU-AC. Table 12

PSU-AC Indicators

Indicator

Color

Fault

Red

Operational

Green

Observation

Yellow