AMETEK SFA Series - Manual (Page 21)

Sorensen SFA Series Overview
M550292-01 Rev G 1-3
1.2.2 E LECTRICAL C HARACTERISTICS
Parameter Specification
Input Power
Voltage (Standard) 208/220 VAC±10% (tested to 187-242 VAC)
Voltage (Options)
380/400 VAC±10% (tested to 342-440 VAC)
440/480 VAC±10% (tested to 396-528 VAC)
Frequency 47 to 63 Hz
Phases
3–phase, 3–wire plus ground. Not phase rotation sensitive.
Neutral not used.
Front Panel Meter Accuracy
Voltage ±0.5% of full-scale + 1 digit
Current ±0.5% of full-scale + 1 digit
Load Regulation (Specified at no load to full load, nominal AC input)
Current 0.1% of maximum output current
Line Regulation (Specified ±10% of nominal AC input, constant load)
Current 0.05% of maximum output current
Current Ripple 1% p-p of full-scale current
Transient Response
The output current will recover to within 1% of the set current
value within 1ms for a 10 to 100% or 100% to 10% step load
change
Output Slew Rate
(10-90% current, full resistive load, nominal AC input):
250A/ms (400A/ms typical) rise, 200A/ms typical fall;
160V models, 87A/ms/5kW (145A/ms/5kW typical), rise,
60A/ms, typical, fall
100V models, 190A/ms/5kW (238A/ms/5kW typical), rise,
104A/ms, typical, fall
Current Overshoot
Maximum 8% of full-scale for 0 to 100% change into a resistive
load
Stability
±0.05% of set point after 8–hr. warm-up at fixed line, load, and
temperature.
Remote Control/Monitor
On/Off control via contact closure, 6-120 VDC or 12-240 VAC,
and TTL or CMOS switch, current monitor, OCP limit set,
summary fault status
Power Factor
>0.9 typical for 208/220VAC input
>0.78 typical for 380/400VAC input
>0.7 typical for 440/480VAC input