Specifications (continued) – Precision Control Systems 1029C User Manual
Page 7
MODEL 1029C
3
10/19/2007
SPECIFICATIONS (Continued)
ZERO AND SPAN:
Potentiometers on the circuit board allow zero and span adjustments of ± 25% of
span for run and idle and are factory calibrated.
CURRENT LIMITING:
A potentiometer on the circuit board allows adjustment of the current limit setting
from 20% to 105% of the controller rating. (The current limit potentiometer is factory
set for 105% of the rated current unless otherwise specified.)
VOLTAGE METER OUTPUT:
A filtered metering signal equals 5.0 Vdc when the nominal line voltage is applied to
the load. Metering load = 5mA max.
CURRENT METER OUTPUT:
A filtered metering signal equals 5.0 Vdc when the frame rating current is applied to
the load. Metering load = 5mA max.
GATE DRIVE:
An optical coupled current source of 250mA with a minimum compliance of 10 volts
provides the gate drives to the SCRs. Duration or "back porch" is approximately 1.4
milliseconds (60 electrical degrees).
VOLTAGE COMPENSATION:
When using voltage feedback, the load voltage remains constant, independent of
supply voltage changes within + 10%, -15%.
POWER DISSIPATION:
1.5 Watts per amp of load current.
CERTIFICATION:
Model 1029C, 120 - 575 Volts, 50 - 750 Amps, is U.L. listed. U.L. File No. E136219.
INTERNAL FEEDBACK AVG:
User has choice of: True RMS Voltage, or True RMS Current. Power feedback can
be factory installed if desired. Only one type of feedback may be selected.
EXTERNAL FEEDBACK:
An external 0 to 5Vdc or 0 to 50uA signal, (derived from the load,) may be used for
external feedback into the controller. See
LINEARITY:
The controlled variable is linear within 2% of Span with respect to command signal.
COMMAND INDICATOR:
This green LED indicates that the gate drive is present.
LOAD CURRENT INDICATOR:
The intensity of this green LED is proportional to the load current.
OVER CURRENT TRIP
INDICATOR:
This amber LED, when lighted, indicates the over current limit has been exceeded
and the Over Current Trip relay has been energized. The SCR's will be prevented
from turning on while this circuit is active. Reset by closure between Pins 9 & 10 or
momentary power interruption. See
.
SHORTED SCR INDICATOR:
This red LED, when lighted, indicates a shorted SCR.
O.C.T. & SHORTED SCR
RELAY CONTACT RATINGS:
The Over Current Trip, and the Shorted SCR circuits, each control a relay which
has form C contacts rated for 5 Amps @ 120Vac. The contacts are available on the
command connector. See
.
CONTROL RANGE:
0 to 98% of supply voltage.
ENVIRONMENT:
Operating temperature 0ºC to 55ºC (32ºF to 132ºF)
Storage temperature: -40ºC to 80ºC (-40ºF to 176ºF)
Humidity:
0 to 95%, non-condensing
PHYSICAL:
50 & 80 Amp controllers 16 pounds
120 & 160 Amp controllers
17 Pounds
200 to 425 Amp controllers
21 Pounds
500 to 750 Amp controllers
40 Pounds
LINE 2 REQUIREMENTS:
The Line 2 connection is the return for the internal control transformer rated at 50
VA. # 18 ga wire.