DC/DC Converters

Powerbox PB271 SERIES DC/DC Converter - Railway (150W)

The PB271 series of DC/DC converters is meticulously designed for railway rolling stock applications, capable of delivering 150W from a 45-154Vdc input range. This series is particularly noted for its versatility in voltage options, offering outputs like 24Vdc, 12Vdc, 27.6Vdc, and 13.8Vdc. Equipped with rugged design features such as high vibration resistance and optional heatsinks, the PB271 units ensure reliable operation under the harsh conditions typically found in railway environments. Safety features such as input polarity reversal protection and overtemperature protection provide additional operational security. The PB271 series is ideal for integrators looking for robust and flexible power solutions in transit applications.

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Powerbox PB271 SERIES  DC/DC Converter - Railway (150W)
Specifications
INPUT
Input voltage

45-154Vdc

Complies with power supplied from an accumulator battery with the nominal voltage of 72Vdc, 96Vdc, or 110Vdc as per EN50155:1996

Input current 4.2A
DC ripple factor 15% (EN50155 cl. 3.1.1.4)

 

OUTPUT
Output Voltage See selection table
Output Current

See selection table

Continuous power

150W See derating curve

 

Ripple voltage 30mV p-p
Line regulation 0.5% at full load
Load regulation

12V, 13.8V: 3%Vnom

24V, 27.6V: 1.5%Vnom

24V -CS option: 4%Vnom

For 0% to full load

Efficiency 85% at full load
Power dissipated

26W at full load

Dissipated on baseplate

Hold up time

See technical illustration

 

ENVIRONMENT
Operating Ambient Temperature See technical illustrations

Operating Baseplate

Temperature

105C

Cooling

Natural Convection

Relative Humidity

5% - 90%

Non condensing

Degree of Pollution

PD3 (Per IEC60077-1)

 

ELECTROMAGNETIC COMPATIBILITY
General

Designed to comply with EN50121-3-2:2000

Conducted Emissions

(Input and Output)

150kHz-500kHz: 99dBuV QP

500kHz-30MHz: 93dBuV QP

Radiated Emissions

30MHz-230MHz: 40dBuV/m QP @ 10m

230MHz-1HHz: 47dBuV/m QP @ 10m

Fast Transient

Burst Immunity

2KV 5/50nS Tr/Th

5KHz rep frequency

Surge Immunity

Input only per EN50155

Direct Transients

1.8KV waveform 5/50us

Source impedance 100ohm

Conducted Radio

Frequency Immunity

3Vrms carrier

150KHz to 80MHz

1KHz , 80% AM

Source impedance 150ohm

Variations & Interruptions

of voltage supply

Input only per EN50155

Unit complies with 45Vdc to 154Vdc

(0.6 x 72V to 1.4 x 110V)

operation continously

Class S1: No interruptions

Radio Frequency Immunity

10V/Mrms carrier

80MHz to 1 GHz

1KHz 80% AM

Electrostatic Discharge

6KV contact discharge

8KV air discharge

 

PROTECTION
Input reverse polarity Indefinite, series diode on input.
Input fusing

5A, 250V (T) HRC ceramic

20 x 5mm fuse

per IEC127Sht V

Input overvoltage

Approx 160Vdc, Auto recovery.

Output overcurrent

110% Auto recovery on removal of over current

Output short circuit

Indefinite. Auto recovery

Output overvoltage

130% Input power must be cycled off then on to restart

Over temperature

110C internal temperature.

Auto restart after cooling down

 

ISOLATION
Isolation

Input to Chassis: 2121Vdc

Input to Output: 4242Vdc

Output to Chassis: 707Vdc

Rated Insulation voltage

Input: 154Vdc

Output: 50Vdc

per IEC60077-1

Rated Impulse

withstand voltage

Input: 2.5KV

Output: 0.8KV

per IEC60077-1

Overvoltage Category

Input and Output: OV2

per IEC60077-1

 

I/O INTERFACE
Input and Output: S

4 way screw T/B 20A/300V

suitable for 4mm2 wire

Input and Output: C

5 way Cage Clamp T/B 20A/300V

suitable for 4mm2 wire

Input and Output: P

5way pluggable screw T/B 20A / 400V with screw flanges suitable for up to 4mm2 wire

Phoenix Contact DFK-PC 4/5-G-7,62-FS4.8 + PC 4/5-STF-7,62 or equivalent

Input and Output: M

MS3102E18-4P F80 panel mounted plug. 4 x #16 crimp contacts. MS service rating D. Mating connector: MS3106E18-4S F80 straight receptacle. Supplied with unit

Ground Terminal

M4 x 12mm stud

"ON" LED

Option L: Green LED mounted on top cover.

ON when output voltage is present

Not available with option C

 

MECHANICAL
General Chassis mount enclosure suitable for standalone use
Mechanical Outline

See Technical Illustrations

Dimensions

Length:

-S, -C: 290mm

-P (including mating connector): 301mm

-M (excluding mating connector): 299mm

 

Width

Without optional heatsinks: 80mm

With optional heatsinks: 130mm

 

Height

-S: 69mm

-C: 73mm

-P, -M: 51mm

-P, -M, + -L option: 55mm

Mounting Centres

280mm x 59mm

Suitable for 4 x M4 hardware

Protection Degree IP40 as per AS1939

Weight

unpacked

Without optional heatsinks: 1.9kg

With optional heatsinks: 2.4kg

 

Technical Illustrations
INPUT
Input voltage

45-154Vdc

Complies with power supplied from an accumulator battery with the nominal voltage of 72Vdc, 96Vdc, or 110Vdc as per EN50155:1996

Input current 4.2A
DC ripple factor 15% (EN50155 cl. 3.1.1.4)

 

OUTPUT
Output Voltage See selection table
Output Current

See selection table

Continuous power

150W See derating curve

 

Ripple voltage 30mV p-p
Line regulation 0.5% at full load
Load regulation

12V, 13.8V: 3%Vnom

24V, 27.6V: 1.5%Vnom

24V -CS option: 4%Vnom

For 0% to full load

Efficiency 85% at full load
Power dissipated

26W at full load

Dissipated on baseplate

Hold up time

See technical illustration

 

ENVIRONMENT
Operating Ambient Temperature See technical illustrations

Operating Baseplate

Temperature

105C

Cooling

Natural Convection

Relative Humidity

5% - 90%

Non condensing

Degree of Pollution

PD3 (Per IEC60077-1)

 

ELECTROMAGNETIC COMPATIBILITY
General

Designed to comply with EN50121-3-2:2000

Conducted Emissions

(Input and Output)

150kHz-500kHz: 99dBuV QP

500kHz-30MHz: 93dBuV QP

Radiated Emissions

30MHz-230MHz: 40dBuV/m QP @ 10m

230MHz-1HHz: 47dBuV/m QP @ 10m

Fast Transient

Burst Immunity

2KV 5/50nS Tr/Th

5KHz rep frequency

Surge Immunity

Input only per EN50155

Direct Transients

1.8KV waveform 5/50us

Source impedance 100ohm

Conducted Radio

Frequency Immunity

3Vrms carrier

150KHz to 80MHz

1KHz , 80% AM

Source impedance 150ohm

Variations & Interruptions

of voltage supply

Input only per EN50155

Unit complies with 45Vdc to 154Vdc

(0.6 x 72V to 1.4 x 110V)

operation continously

Class S1: No interruptions

Radio Frequency Immunity

10V/Mrms carrier

80MHz to 1 GHz

1KHz 80% AM

Electrostatic Discharge

6KV contact discharge

8KV air discharge

 

PROTECTION
Input reverse polarity Indefinite, series diode on input.
Input fusing

5A, 250V (T) HRC ceramic

20 x 5mm fuse

per IEC127Sht V

Input overvoltage

Approx 160Vdc, Auto recovery.

Output overcurrent

110% Auto recovery on removal of over current

Output short circuit

Indefinite. Auto recovery

Output overvoltage

130% Input power must be cycled off then on to restart

Over temperature

110C internal temperature.

Auto restart after cooling down

 

ISOLATION
Isolation

Input to Chassis: 2121Vdc

Input to Output: 4242Vdc

Output to Chassis: 707Vdc

Rated Insulation voltage

Input: 154Vdc

Output: 50Vdc

per IEC60077-1

Rated Impulse

withstand voltage

Input: 2.5KV

Output: 0.8KV

per IEC60077-1

Overvoltage Category

Input and Output: OV2

per IEC60077-1

 

I/O INTERFACE
Input and Output: S

4 way screw T/B 20A/300V

suitable for 4mm2 wire

Input and Output: C

5 way Cage Clamp T/B 20A/300V

suitable for 4mm2 wire

Input and Output: P

5way pluggable screw T/B 20A / 400V with screw flanges suitable for up to 4mm2 wire

Phoenix Contact DFK-PC 4/5-G-7,62-FS4.8 + PC 4/5-STF-7,62 or equivalent

Input and Output: M

MS3102E18-4P F80 panel mounted plug. 4 x #16 crimp contacts. MS service rating D. Mating connector: MS3106E18-4S F80 straight receptacle. Supplied with unit

Ground Terminal

M4 x 12mm stud

"ON" LED

Option L: Green LED mounted on top cover.

ON when output voltage is present

Not available with option C

 

MECHANICAL
General Chassis mount enclosure suitable for standalone use
Mechanical Outline

See Technical Illustrations

Dimensions

Length:

-S, -C: 290mm

-P (including mating connector): 301mm

-M (excluding mating connector): 299mm

 

Width

Without optional heatsinks: 80mm

With optional heatsinks: 130mm

 

Height

-S: 69mm

-C: 73mm

-P, -M: 51mm

-P, -M, + -L option: 55mm

Mounting Centres

280mm x 59mm

Suitable for 4 x M4 hardware

Protection Degree IP40 as per AS1939

Weight

unpacked

Without optional heatsinks: 1.9kg

With optional heatsinks: 2.4kg

 

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product variant PB271 SERIES

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