Two phases with four lines power supply !?

[amr]

I have a Technical Specification of a medical x-ray equipment which states that it requires : Two phases with four lines 380v power supply

I need to know what does that mean ?

 

[loren]

Sounds like they are asking for a single phase service to the area with the capabilities of 4 circuits and the voltage for this will be 380 volts.
I take it that you have not seen the equipment yet.

 

[Buck Parrish]

You might also ask, how many amps will be needed for the eqipment.

 

[btharmy]

Could also be a round about way of saying single phase four wire, (two hots, neutral, ground).

 

[Volta]

I have a Technical Specification of a medical x-ray equipment which states that it requires : Two phases with four lines 380v power supply

I need to know what does that mean ?

It's not old is it? Two phase systems have existed. I've never seen them, don't know anyone that has, but two electrically isolated windings 90 degrees out of phase make a true 4-wire two phase system.

Wecome to the forum.

 

[norcal]

I have a Technical Specification of a medical x-ray equipment which states that it requires : Two phases with four lines 380v power supply

I need to know what does that mean ?

This 50 HZ. equipment?

 

[amr]

Specifications: Power Output : 40KW
X-ray Tube : Rotary anode
Focus : 1.0mm
Thermal Capacity : 150 KHU
Commute Method : Full Wave Commutation
Tube Voltage : 50～125KV,interval 1KV
Tube Current : 100mA(min) ～500 mA (max) Adjustable
with different grades
Exposure Time : 0.020s～5.000s(23 grades)
Bucky grid : Grid Density : 40L/cM
Grid Ratio : 10:1
Focus Distance : 120cm
Stationary Dimension : 17″17″
Power Supply : Two Phases with Four Lines(380V?10％,
50Hz Inner-resistance≤.3Ω Capacity
≥0KVA)
Structure
Bed Size : 2000?760mm
Bed Height : ≤00mm
Bed Transverse Movement Distance : ?110mm
Bed Longitudinal Movement Distance : ?325mm
Cassette Movement Distance : ≥60mm
X-ray Generator Revolution around Pillar Center: ?90?
Pillar Turning : 40??9?
Pillar Movement Range along Bed : ≥350mm
Distance Between Focus and Film(SID) : 480～1230mm
Time Limit of Collimator Lamp : 45sec
Vertical Movement of Sternum Plank : 470～1468mm
Film Size : 5"?7"～14"?17"

Features:
1. Anti-electroshock, radiation-proof, and full wave commutation.
2. With electromagnetism controlling system, fluctuation bed board
and manual operation pillar to ensure a fast and reliable
location.
3. Structure designed based on anthropotomy, with beautiful
appearance, and easy to operate.
4. Convenient to take stretcher photograph.
5. A sternum plank is optional (grid density: 40L/cm; grid ratio:
10:1; focus distance: 120cm;stationary, dimension: 17″?17″,
and distance adjustable)

 

[amr]

This 50 HZ. equipment?

yes it is .

 

[wasasparky]

Could also be a round about way of saying single phase four wire, (two hots, neutral, ground).

That would by my guess - two phases of a 380Y220V system.

Who is the manufacturer? You could likely search their website and get a better description.

 

[Smart $]

...Capacity≥0KVA)...

This part of the power supply spec should be rather easy to accommodate:grin:

 

[broadgage]

I think that the spec may have lost something in translation!

But I think they PROBABLY mean is that the equipment requires connection between two phases of a European 220/380 volt system, and a neutral and a ground, i.e. 4 wires in total.

X ray equipment uses high voltages internaly, and the easiest way of obtaining such would be a step up transformer with a primary winding to suit the maximum available supply voltage, which in Europe would 380/400 volts phase to phase.
The neutral would not be needed for such a transformer, but some other part of the X ray machine presumably requires 220 volts, phase to neutral.

 

[LarryFine]

It sure sounds like it wants to really be two phase, but they probably would have said 5-wire.

Can't anybody get a look in the actual unit and count terminals, or at least get a cut sheet?

 

[Kartracer087]

If it says "two phase" then the chances are that it wants two single phase lines, each line connecting to neutral, so thats three wires there. The fourth wire could just be an equipment ground. The only other possiblity I can see is it uses a phase to phase connection with an unusual grounding scheme.

 

[jghrist]

I'll have to vote with wasasparky & broadgage considering the European voltage and the 50 Hz. They want two phases and neutral of a 380Y220V system plus a ground.