Low Voltage DC to DC Power Converter for Railway Applications PST-4

Low Voltage DC To DC Power Converter PST-4

  • Nominal 74VDC INPUT
  • Wide DC Input
  • High Reliability
  • Rugged Construction
  • Wide Temperature Range

DC INPUT:
50-80 VDC with 74 VDC nominal.

EFFICIENCY:
70% minimum or greater.

OUTPUT VOLTAGE LINE REGULATION:
Unit maintains the output voltage within ±2% for normal operating input voltage range.

OUTPUT VOLTAGE LOAD REGULATION:
The unit maintains the output voltage within ±3% for currents between 1A and 14A.

OUTPUT VOLTAGE:
13.6 VDC

OUTPUT LOAD CURRENT:
Up to 14A of continuous load current, and up to 15A of load current at 25% duty cycle with an “on” time of 30 seconds maximum.

INSULATION RESISTANCE:
20 Megaohms minimum, between input and chassis, input and output, and output and chassis when measured at 82 VDC.

REMOTE ENABLE:
Output enabled by external contact closure (10mA D.C. max). Max “off” state voltage 0.8 VDC.

OPERATING TEMPERATURE RANGE:
0ºC to +85ºC

ISOLATION:
Input to Output 1000 VDC
Input to Case 1000 VDC
Output to Case 500 VDC

SHORT CIRCUIT PROTECTION:
The unit provides protection against overloads and short-circuits. No damage results from any overload condition. The unit automatically returns to full rated operation within three seconds upon removal of the overload condition.

OVERVOLTAGE PROTECTION:
The unit is protected electronically from an overvoltage condition. Input power to the unit may need to be removed and re-applied to resume unit operation.

INPUT PROTECTION:
Transient Protection Option:
Provides additional protection against output interruption in case of input power bus transients (order Model PST-5)
External fuse recommended.

INPUT RIPPLE:
2.0 VRMS

OUTPUT VOLTAGE RIPPLE:
Less than 20 millivolts, RMS and 60 millivolts, peak.

Weight:
7.0 lbs max.

REMOTE ERROR SENSING:
Regulator monitors the voltage of Output No. 1 Directly at the load using extra “Sensing” leads and compensates for a DC voltage drop up to 0.3 Volts in the load leads.

VOLTAGE POLARITY:
Accidental reversal of the input voltage polarity does not damage the unit when the unit is protected by a 20-Ampere fuse or circuit breaker at the power source.

OPERATING TEMPERATURE RANGE:
Operating: -30°C to +65°C.
Non-Operating: -30°C to +80°C
Relative Humidity: 5-90%, non-condensing.

INSULATION:
The isolation between input and output (both common mode and differential), and between the input and the chassis ground (both common mode and differential) shall be capable of passing a 1520VDC stress test for one minute. All other plug and socket connection shall be able to withstand a one minute dielectric test as a described in section 5.3 of IEC 571-1 using 500V.