MDCC-T30_0_11

BRAGA MORO SISTEMI DI ENERGIA S.P.A.

MDCC_T30.0.11.doc

MODULAR DC-DC CONVERTER MDCC T 48V 30A 1+1

The Modular DC-DC Converter MDCC T 48V 30A1+1 is based on the DC-DC Converter Modules BMD4830.

It is designed to satisfy the typical requirements of telecommunication equipment.

In mains present condition it ensures a stabilized and filtered supply to the loads.

The Battery Management Option can be included to guarantee the full efficiency of the back-up batteries and, in case of DC Main supply fail, uninterruptible power supply to the loads.

The modular design, flexible and up-gradable, permits replacement of existing old plants and expansion of new plants without any interruption to service.

The system is entirely managed by a microprocessor System Control Unit (SCU), which concurrently monitors all the operating steps of the paralleled DC-DC Converter Modules (DC Modules), it signals the failures and manages all the parameters and the operating thresholds of the system. The whole configuration is software up-gradable.

The system redundancy, with one or more DC Modules besides the nominal power requirements, improves the system reliability. The system can be expanded, up-graded or maintained during the normal operation.

An isolated interface, like CAN BUS, connects all the DC Modules to the System Control Unit.The LAN Ethernet 10 Base T interface provides the LAN connection and allows the system remote management and monitoring from a standard personal computer via a common WEB browser. The LED/relay alarms can be automatically transmitted via e-mail or SMS.

Each DC Module input is selectively protected by external independent Miniature Circuit Breaker (MCB) and by internal input fuses in order to cut off the single DC-DC converter in case of fault. The DC Modules outputs are paralleled and the load is equally shared among the DC-DC converters even in case of fault of the System Control Unit.

The DC Distribution Panel provides the selective protection of the DC output loads through independent Miniature Circuit Breakers.

When the input voltage exceeds some configurable thresholds the DC Modules are halted with the consequent discharge of the battery. When the correct parameters of the main DC input are restored, the DC Modules restart automatically.

BRAGA MORO has the right to change these data with no pre-advice

Via Canzo, 4 20068 PESCHIERA BORROMEO (MI) ITALY

Tel. +39.02.51.67.22.01 Fax : +39.02.51.67.22.14 UNI EN ISO 9001-2000

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MDCC_T30.0.11.doc

Modular DC-DC Converter 48V-30A 1+1 Block Diagram



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+

+

+

+

+

+M #1

I #12P 20A

I #22P 20A

I #32P 20A

125V-48VDC-DC #1

Spare Slot

Spare Slot

DC Distribution Panel

DC-DC Converter 48V-30A

S #12P 63A

+

+

+

+

+

+M #2

I #42P 20A

I #52P 20A

I #62P 20A

125V-48VDC-DC #2

Spare Slot

Spare Slot

DC-DC Converter 48V-30A

S #22P 63A

#3 output terminals

for external DCDP

Id #11010x

2P 20A

Id #112010x

2P 10A

#3 output terminals

for external DCDP


MDCC_T30.0.11.doc

MDCC T 48V 30A 1+1

CLIMATIC SPECIFICATIONSRelative humidity 0% 90% (95% non-condensing) Temperature -10C +55C (storage up to +70C)Altitude 3000m above sea level Protection Degree IP20BELECTRICAL FEATURES (full equipment configuration)

INPUTInput voltage 125Vdc / 110VdcMax variation on input voltage 99Vdc 138VdcInput current @ minimum input voltage 16AEfficiency @ rated conditions 92%Max input absorbed power 1584WSelective single DC-DC converters input protection MCBs 6x 20A 2P

OUTPUTRated output voltage 48VdcAdjustable output voltage range 38Vdc 58VdcVoltage stability (steady state) < 1%Alternate residual ripple 0.7mV psofom 30mV eff 100mVppRated output current 30AAdjustable output current limit range 27A 33ATotal number of installed DC Modules 2Total number of spare slots for future additional DC Modules 4Load sharing among the DC Modules 5% of the DC Module rated currentDynamic Regulation for 25% step DC mains variations 0.1%Dynamic Regulation for step load change between 10% and 90% 5%DC distribution panel MCBs 10x 20A 2P + 10x 10A 2PTHERMAL FEATURES (full equipment configuration)Dissipated Power 135kcal/hCooling Four (4) fans integrated onto each DC ModuleMECHANICAL FEATURES (full equipment configuration)Dimensions W x D x H mm 600x420x820Weight 88 KgLoad imposed on the floor 255 Kg/m2

STANDARD REFERENCESSafety EN 60950Conducted emissions EN55022Electrostatic discharge immunity EN 61000-4-2 (4KV contact)RF radiated field immunity EN 61000-4-3 (3V/m)Fast transient / burst immunity EN 61000-4-4 (input: 4KV; output: 1KV)Surge immunity EN 61000-4-5 (4KV 1,2/50sec)



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MDCC_T30.0.11.doc

System Control Unit

The System Control Unit (SCU Card) manages the whole system, it includes the following parts:

Operator Interface section; Analogue input signals section; CAN BUS communication section; Real Time Clock (RTC); Power Supply section; LAN Ethernet 10 Base T interface section.

The Operator Interface allows the access to the system software configuration, it is composed of:

n. 1 display; n. 6 signaling LEDs; n. 4 function keys.

The System Control Unit communicates with all the modules by means of a CAN BUS connection.All the modules are continuously monitored to detect alarms and events that are associated to the relevant time reference and recorded (up to 1000 events can be stored).

The System Control Unit continuously monitors the input and output parameters, and consequently adjusts the converters voltage/current set-points.

Standard remote-alarm interface is provided by Relay Card (RL Card) equipped with six potential-free contact relays, fully software configurable. Two Additional RL Cards can be provided as option.

The LAN Ethernet 10 Base T interface allows the connection to the TLC network for the remote management of the system and the automatic transmission of SNMP traps, e-mail or SMS.

The Battery Management Option can be included to manage independently and separately different battery strings selectively protected, the measured and estimated parameters are:

Battery temperature; Battery voltage; Battery current; Battery Available Capacity; Battery Discharge Condition; Battery Residual Capacity; Battery Discharge Level.

The battery floating voltage is adjusted according to the temperature and some software configurable parameters.



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MDCC_T30.0.11.doc

Positioning

Floor standing configuration (with optional Bottom Box). Wall mounting configuration.



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MDCC_T30.0.11.doc

DC Module BMD4830

The DC Module BMD4830 is a DC-DC Converter with input voltage 125Vdc, output voltage 48Vdc. It is composed of an input capacitive filter, a chopper section, and an inverter section that supplies the steady output voltage. The analogue regulation section allows the paralleling of the RD Modules outputs and includes all the protections. The power regulation is performed by means of a pulse width modulation signal.All the operation is under the control of an internal microprocessor.The microprocessor configures the set-points and manages the power-on/power-off procedure according to the current operation status and data received from the System Control UnitThe DC Module is cooled by four speed controlled fan on board.

Protections

Internal AC input fuses; Overload protection: output continuous short circuit sustained; Output over voltage protection with selective disconnection; Slow front input over voltage protection: temporary shutdown when thresholds are exceeded; Steep front input over voltage protection: varistors protection; Over temperature protection: de-rating over the first temperature threshold, shutdown over the second temperature threshold.

Features

Parallel operation; Load sharing; Selective disconnection in case of fault; Soft-start; Hot-plug; Plug and play; Current calibration and voltage limitation.

The Operator Interface includes n. 2 signaling LEDs:

LED Status Description

Upper

LED

GREEN RD Module ON

YELLOW Overload or over temperature

RED RD Module OFF

Lower

LED

RED Generic Alarm

OFF Normal operation



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MDCC_T30.0.11.doc

BMD4830ELECTRICAL FEATURES

INPUTInput voltage 125Vdc / 110VdcMax variation on input voltage 99Vdc 138VdcInput current @ minimum input voltage 16AEfficiency(@ rated conditions 92%Max input absorbed power 1584W

OUTPUTRated output voltage 48VdcAdjustable output voltage range 38Vdc 58VdcVoltage stability (steady state) < 1%Alternate residual ripple 0.7mV psofom 30mV eff 100mVppRated output current 30AAdjustable output current limit range 27A 33ALoad sharing among the DC Modules 5% of the DC Module rated currentDynamic Regulation for 25% step DC mains variations 0.1%Dynamic Regulation for step load change between 10% and 90% 5%

ACOUSTIC NOISEMeasured in open field at 1.5 m from the EUTand at 1.3 m of height from the floor

50dB

THERMAL FEATURESDissipated Power 135kcal/hCooling Four (4) speed controlled fans integrated

MECHANICAL FEATURESDimensions W x D x H 231 mm x 350 mm x 1UWeight 4KgElectrical connection HOT-PLUG (Input/Output/Signals) rear sideInsertion Frontal



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Modular DC-DC Converter 48V-30A 1+1 Block DiagramSystem Control UnitPositioningDC Module BMD4830

MDCC-T30_0_11

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