RM4850 4/98 REV A

Page 3

Output Specifications

Rectifier Failure Alarm (RFA)

Problems occurring because of an unacceptable relation-

ship between the output power and load conditions will

cause a Rectifier Failure Alarm (RFA). Conditions which

may lead to an RFA include:

Low Current - Output current has decreased to below

5% of its rated value.

Unit Shutdown - Any shutdown occurrence due to

overvoltage, external shutdown command, unacceptable

ambient temperature conditions or out of bounds AC input

voltage.

Fan Malfunction - The fan has stopped operating or is

not providing the airflow needed to cool the unit.

Over Temperature - The ambient temperature has

exceeded 65°C.

PROTECTION, ALARM AND CONTROL SYSTEMS

Parameter

Conditions

Min

Typ

Max

Units

Voltage Adjustment Range

float voltage

48

60

equalize voltage

48

60

Regulation

0-100% load within

specified input voltage and frequency range

± 0.5

%

Load Current

within a 10 - 100% rating

±10

%

Hold-Up Time

nominal AC line

>16

mS

Filtering

Voice band

<32

dBrnc

Wide band noise

@20 MHz

<250

mV p-p

ENVIRONMENTAL

Temperature

Operating

-40

+65

°C

-40

149

°F

Storage

-50

+85

°C

-58

185

°F

Humidity

non-condensing

0

95

%

Altitude

0

7000

ft.

0

2133

m

Heat Dissipation

@54V

1025

Btu/hr

Audible Noise

5 ft. from any vertical surface

<55

dBa

High Voltage Shutdown (HVSD)

Shutdown occurs while voltage is high and the rectifier is

delivering greater than 10% rated current. When internal

shutdown occurs, the unit may be restarted by a local

switch or by a remote signal.

Surge Protection

The unit will withstand lightning and input surges of

6000V/3000A.

Under Voltage Protection

operation is automatically inhibited.