Sorensen SFA Series Specifications (at nominal AC line and 25ºC)
| Electrical Characteristics | |||||
|---|---|---|---|---|---|
| Control Mode | Current Control | ||||
| Front Panel Meter Accuracy | Voltage ±0.5% of full-scale + 1 digit Current ±0.5% of full-scale + 1 digit |
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| Load Regulation | (no load to full load, nominal AC input) Current 0.1% of rated output current | ||||
| Line Regulation | (±10% of nominal AC input) Current 0.05% of rated output current | ||||
| Current Ripple | 1% p-p of full-scale current | ||||
| Transient Response | Output current recovers to within 1% of current setpoint within 1ms for a 10 to 100% or 100% to 10% step load change | ||||
| Output Slew Rate (10-90% resistive load) | 250A/ms (400A/ms typical) rise, 200A/ms typical fall; 160V model 87A/ms/5kW (145A/ms/5kW typical), 60A/ms, typical, fall | ||||
| Output Capacitance | 60V Models: <2µF 160V Models: <3µF |
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| Stability | ±0.05% of setpoint after 8–hr. warm-up at fixed line, load, and temperature using remote sense | ||||
| Power Factor | >0.9 typical for 208/220VAC input >0.78 typical for 380/400VAC input >0.7 typical for 440/480VAC input |
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| Remote Analog Control |
Current Setpoint Accuracy ±0.8% of full-scale output |
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| Efficiency | 87% typical at full load, nominal line | ||||
| Remote Control/Monitor | On/Off control via contact closure, 6-120 VDC | ||||
| Overvoltage Protection | Fixed at approximately 110% of the rating compliance voltage. Reset requires cycling the front panel standby power switch off/on Isolated Analog Control (option) Input to Output Isolation: 500 V Compliant with maximum terminal float voltage. Recommended operation under SELV normal conditions. |
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| Environmental Characteristics | |||||
|---|---|---|---|---|---|
| Ambient Operating Temperature | 0 to 50°C | ||||
| Storage Temperature | -25 to 65°C | ||||
| Temperature Coefficient | Current Setpoint 0.03% / °C of rated current | ||||
| Cooling | Internal Fans. Zero clearance stacking | ||||
| Humidity | 0 to 90% at 40°C; 0 to 50% at 25°C non-condensing | ||||
| Altitude | Full power at 5,000 feet, 10% derating of full power for every 1,000 feet above 5,000 feet | ||||
| Regulatory | Certified to UL/CSA 61010 and IEC/EN 61010-1 CE Compliant (LVD and EMC Directives) | ||||
| Input Power Options | |||||
|---|---|---|---|---|---|
| Configuration | 3–phase, 3–wire plus ground. Not phase rotation sensitive. Neutral not used | ||||
| Voltage Selection | 208/220 VAC±10%, 47 to 63 Hz 380/400 VAC±10%, 47 to 63 Hz 440/480 VAC±10%, 47 to 63 Hz |
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| Physical | |||||
|---|---|---|---|---|---|
| Up to 15kW in 3U | 19.00in W x 25.12in D x 5.25inH; 80 lbs. (48.3cm W x 63.8cm D x 13.3cm H; 36 kg) | ||||
| 15 - 30kW in 6U | 19.00in W x 25.12in Dx 10.5in x H; 160 lbs. (48.3cm W x 63.8cm D x 36.7cm H; 73 kg) |
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