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 inout 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 a1075 VAC 60 Hz 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.