DKS Series Grounding Transformer
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1. Product Description:
The grounding transformer is usedin the three phase power system with neutral insulation, to provide artificial neutral point.
This neutral point can be directly grounded. It can also begrounded by reactor or arc suppression coil. With a secondary winding,
the grounding transformer can not only provide a neutral point for system but also provide power supply to other parts of system.
2. Product Characteristic:
Special environment should be informed such as altitude, chemicaldeposition, dirt, corrosive media, etc., for dry-type transformers insulation shouldbe provided.
l Mean annual temperature is +20℃and below +20℃(if it’s water-cooling product, the highest daily average temperature of cooling-water is +25℃)
l Altitude is not more than 1000m.
l Installation site should be without seriousvibration, bumps and chemical corrosion,
3.Specification：
Type | Primary rated capacity （kVA） | Secondary rated capacity （kVA） | Rated voltage （kV） | Neutral point voltage （A） | Outline Dimension L x W x H |
DKS-200/6 | 200 | 6.3 | 50 | 1260×850×1460 | |
DKS-315/6 | 315 | 10.5 | 50 | 1580×900×1500 | |
DKS-400/6 | 400 | 8.3 | 100 | 1610×910×1550 | |
DKS-630/10 | 630 | 10.5 | 100 | 1640×950×1600 | |
DKS-315/10 | 315 | 50 | 10.5/0.4 | 50 | 1740×975×1670 |
DKS-315/10 | 315 | 160 | 10.5/0.4 | 50 | 1755×990×1600 |
DKS-630/10 | 630 | 250 | 10.5/0.4 | 100 | 1800×1010×1800 |
4. Reference Picture:
- Q: How to connect in parallel the following transformers:a) Dy1 Dy11b) Dd0 Dd6
- does this make sense to any one? delta /star 1 and delta start 11? is thi 1 transformer with a turns ratio of 1:11? question doesnt make sense?
- Q: A 120 kVA, 7000/277 V (What does this rating mean) distribution transformer has the following resistances and reactances: Rp 5.5 ohms Xp 6.5 ohms Rs 0.007 ohms Xs 0.008 ohms Rc 55 kohms Xm 15 kohms The excitation branch impedance are given referred to the low voltage side of the transformer: a) What's the equivalent circuit of the transformer referred to the low voltage side b) What's the the per unit equivalent circuit c) Assume that this is supplying rated load at 277V and 0.89 lagging power factor, What is the transformer input
- 120 kVA, 7000/277 V (What does this rating mean) Primary voltage rating: 7000 V, secondary voltage rating: 277 V, rated load: 120 kVA It is unclear whether this is a single-phase or three-phase transformer. You probably need to assume it is single-phase. The equivalent circuit of a 3-phase transformer is analyzed as one of three single-phase transformers that could be connected to make the equivalent Y-Y three-phase transformer. The secondary voltage, 277 V, is the line to neutral voltage for a 480 V, wye distribution system. That is a USA standard system voltage. The primary would be 12,124 V L-L, 7000 V L-N. That would a reasonable primary distribution system voltage. Referring the circuit to the low side means changing the primary component values to the equivalent secondary values and moving the ideal transformer to the primary side of the circuit as shown below. To change the primary impedance values, multiply by (Sec V/Pri V)^2.
- Q: If you use a power transformer (120VAC to 12VDC) past its secondary amperage, will it burn up or will it just not supply sufficient power?
- Try it and find out.
- Q: i need to have an immediate answer (solution to this) thanks:Determine the transformer bridge rectifier and filter capacitorspecifications/values required to produced an output current of 3A and a nominaloutput voltage of 17VDC with a ripple voltage of 2 Vpp. Assume a line voltage(from Meralco) of 220VAC, and that the design is to use a center-tappedtransformer.2. Given the characteristics of the raw DC supply just designed, determine thecomponent values of a transistor regulator circuit (based on “Simple TransistorVoltage Regulator Circuit” from the CCS1
- If you are to use a center-tapped transformer, you don't need a bridge rectifier; a pair of diodes will do the job. The output voltage will need to be about 13.5 vrms each side of the center tap; this will deliver 19 volts p-p, the rectifier will eat 0.75 volts, the ripple will amount to one more, and you'll have your 17 vDC. Since the filter capacitor will be working into a load of 17/3 ohms, and the voltage decay is to be no more than 2/17 of the output, you can use the exponential decay equation to figure the necessary time constant, and use the load resistance to get the capacitance. (You can punch a calculator as well as I can.) 2: The regulator transistor will be burning five volts at three amps, or 15 watts dissipation. A TO-3 may be satisfactory in this application, but it will be a close call. The rest of the component values can be determined using Ohm's law.
- Q: Transformer 1250KVA Dimensions
- 10kV grade distribution transformer oil immersion 1250KVA appearance size 1786X1170X1410 (length X width X height); dry 1250KVA appearance size 1470X1200X1450 (length X width X height), for reference, the specific best asked suppliers.
- Q: 440 kv(Primary side) and then at the receving station its step down from 440kv(primary side of the step down transformer) 33 kv.in the tranmission line,between both the primary side of the transformers the voltage is 440kv.then how the power flows in tranmission lines?
- A transformer can handle power flow in either direction. The primary may be either the LV or the HV side of the transformer, likewise the secondary. By convention the primary is the side where the power flow enters the transformer and the secondary is the side where it leaves. It is NOT that the HV side is always termed primary!! In this case the generating transformer (at the generator) has a 33kV primary and 440kV secondary. This is often called a step-up transformer. The power flows from the generator through the generator transformer and into the line. It then flows along the line to the second transformer at the receiving substation. Here the HV side is primary and the LV side secondary (in other words, as you mention, it is a step-down transformer). The power is flows through this transformer and out into the further circuits. The power is (substantially) preserved at each transformation by the transformed current levels being inversely proportional to the transformed voltage levels so that V x I constant. Although nominally the voltage at each end of the line is 440kV there may (or may not) be a small difference in the voltage magnitude and there will certainly be a phase difference. If the voltage magnitudes at each end are v1 and v2 respectively and the angle between v1 and v2 is A, then the power transmitted is (v1.v2 sinA)/X where X is the impedance of the intervening line
- Q: The book said the main transformer power failure operation should first stop the load side after the power side, is to prevent the transformer in the case of multi-power reverse charging. What is the transformer anti-charging here? What's wrong?
- Here to step-down transformer as an example: The forward power supply is powered by the high side of the transformer to the low side of the transformer, and the "reverse charge" is powered by the low voltage side of the transformer to the high side. When the main transformer power failure operation, we must first load side, that is, first stop low side, after the power side, that is, after the high pressure side; If there are two main transformer running side by side (or other means of multiple power), when one of the main transformer power failure, if the first stop high-voltage switch, then low-voltage switch has not been disconnected, will make another master Variable power through the low-voltage switch back to the transformer power supply, resulting in transformer back-off situation; this situation not only failed to power transformer, but also increased the impact of a transformer, when there is over-voltage, etc., may cause resonance hazards Equipment safety.
- Q: i would like to know how transformer tap changer operate to vary the output voltage. And also why is always connected to the high voltage side of the transformer.
- Thjey are 2 types on load tap changers Off load tap changers High voltage means low current. Less burning of contacts and sparks!
- Q: A transformer consists of 250 primary windings and 838 secondary windings. If the potential difference across the primary coil is 25.5V , what is the voltage across the secondary coil ? If the potential difference across the primary coil is 25.5V , what is the effective load resistance of the secondary coil if it is connected across a 135Ω resistor?
- Transformer equation, N_pV_pN_sV_s V_s (N_p V_p)/N_s, plug in the numbers and calculate. N_p/N_s sqrt(Z_p/Zs)
- Q: I have a 25 volt 2 amp transformer from radioshack and a non push dimmer from walmart. The dimmer has two black wires and one green. The transformer has on one side two yellows and a black and on the other side two blacks. I need to know how to hook the dimmer up to an outlet then how to wire it to the transformer.
- The number of wires on the transformer don't match with the stated voltages. The two blacks are probably the 120 volts input (assuming this is the US) but the 3 wires on the secondary imply you have a center-tap secondary, possibly 25 volts center tapped at 2 amps. I'm also assuming that the hot wire is sized to operate on 25 volts. The transformer should come with some sort of labels for the wires, if not take it back and get one that does. Once you get the transformer straightened out, here is a wiring list. AC hot from line cord black wire to one side of a 1 amp fuse holder AC neutral from line cord white wire to one of the line connections of the transformer AC ground from line cord green wire to transformer case and to case of dimmer (green) and to metal case this is all mounted in. Other side of fuse holder to one of black wires of dimmer Other black wire from dimmer to the second of the line connections of the transformer One of secondary wires on transformer to one side of the hot wire Other secondary wire on transformer to other side of the hot wire Tie the center tap of the secondary, if there is one, to ground. If not, tie one of the secondary wires to ground. You will note that I included a small 1 amp fuse. You can get a small metal box to mount this stuff in, or a electrical junction box. The latter is better as it has punchouts for cable in and out. Be sure to clamp the wires where they enter and leave the box.
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DKS Series Grounding Transformer
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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