The Sorensen SG Series is one of the most popular high power programmable DC power supplies on the market. The SG Series is designed for exceptional load transient response and low noise output. With a full 15 kW available down to 20VDC output in a 3U package the SG Series leads the industry in power density. The power density is enhanced by a stylish front air intake allowing supplies to be stacked without clearance between units.
Here are some frequently-asked question about the Sorensen SG Series:
- How do I choose a circuit breaker or wire size for connecting the AC input power to my SGA / SGI power supply?
For 5 kW - 15 kW output SGA/SGI models, we recommend using a 100 A circuit breaker or fuse. For 20 kW - 30 kW output SGA/SGI models, we recommend a 200 A circuit breaker or fuse. If you are unfamiliar with high power, electrical AC connections, contact your facilities manager or an electrician for assistance.
- Can I power-up my SGA/SGI power supply using single-phase AC input power?
No. SGA/SGI power supplies require 3-phase AC input power. See the Operation Manual for more details.
- Can I change the AC input voltage required by my SGA/SGI power supply?
No. SGA/SGI power supplies’ AC input power cannot be changed once a unit is built. Each supply uses input filter boards designed to work with a particular AC input voltage. See the Operation Manual for more details.
- What is the connection orientation or phase rotation of my input AC line phases and where do I connect neutral?
SGA/SGI power supplies do not require a specific phase rotation for input AC lines. Neutral is not required or used and should never be connected. See the Operation Manual for more details.
- What is the slew rate of my SGA/SGI power supply?
SGA/SGI power supplies have a typical slew rate of 100 ms. Slew rate is defined as the time it takes the output to change from 5-95% of full scale. SFA slew rate is 250A/ms rise, 200A/ms fall at full load (minimum) 400A/ms typical.
- When I have the SGA/SGI front panel switch off, the top of the unit gets warm. Is this a problem?
No, this does not indicate a problem. The front panel switch on SGA/SGI power supplies is a soft enable/disable shutdown and not a circuit breaker. If you use only the front panel switch to turn of the power supply, portions of the internal circuitry remain live. The heat that you notice is generated by this live power feeding the soft-start circuit in the SGA/SGI, which limits the inrush current at power up. Removing external power from the SGA/SGI supply via an external contactor or circuit breaker will eliminate this heating effect.
- I want to parallel multiple SGA/SGI power supplies, but did not receive any parallel cables, should this have been shipped with the units I purchased?
Parallel cables are not part of the standard model ship kit. Parallel cables, part number 890-453-03, are sold separately as accessories. Please contact Ametek Programmable Power Sales for a quote or order details.
- Must I connect remote sensing to operate my SGA/SGI power supply?
No. Remote sensing is not required for operation, but it is recommended and needed to achieve specified load regulation. See the Operation Manual for more details..
- What maintenance is required for my SGA/SGI power supply?
We recommend that you perform a visual inspection and verify the calibration annually. We also suggest cleaning the supplies at least once a year. See the Operation Manual for more details.
For more information on the Sorensen SG Series, contact AMETEK Programmable Power by sending an e-mail to firstname.lastname@example.org or phoning 800-733-5427.