SCB9 SCB10series of resin insulating dry-type transformer

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SC(B)9/10-□/□ series of resin insulating dry-type transformer

1. Model

S---------------------------------three-phase

C----------------------------------solidification forming (epoxy resin cast)

B----------------------------------LV foil coil

9-----------------------------------performance code

□---------------------------------rated capacity (KVA)

□---------------------------------rated voltage (HV KV)

2. General

With the advanced technology brought in from overseas, we developed SC9、SCB9 series and SC10、SCB10 series padding thin-insulation dry-type distributing transformer whose winding is sealed up with epoxy, therefore the resin insulating dry-type transformer is flame-retardant, explosion-proof, free from maintenance and pollution, and it is compacted and can go deep into load center, besides, with scientific and reasonable design and coating craft work, it has advantages of low partial discharge capacity, low noise, good heat dispersion and it can run over a long time with 125% rated load in the circumstance of cold wind. It applies intelligent thermal controller and has the functions that it will alarm when there is fault or the temperature is exceeded and switch off as the function of “black box”. It can be monitored and controlled by connecting it to the computer through its RS485 serial interface.

Therefore, it is widely used in the places such as hotel, restaurant, airport, power plant, hospital, skyscraper, shopping center, and residential areas and other adverse environments like subways, smelt and power plant, ship, offshore drilling platform, etc.

1. Technical parameters

Rated capacity (KVA)	Voltage group(KV)		Vector group	Dissipation (KW)		No-load Current (%)	Impedance voltage (%)	Insulating level	Weight (kg)
Rated capacity (KVA)	HV	LV	Vector group	No-load	Load (120℃)	No-load Current (%)	Impedance voltage (%)	Insulating level	Weight (kg)
10	11 10.5 10 6.6 6.3 6	0.4	Dyn11 or Yyn0	0.15	0.325	7.2	4	F/F	130
30				0.215	0.75	3.2			260
50				0.305	1.055	2.8			315
80				0.415	1.460	2.6			470
100				0.45	1.665	2.4			520
125				5.30	1.955	2.2			585
160				0.61	2.25	2.2			670
200				0.70	2.675	2.0			790
250				0.81	2.915	2.0			920
315				0.99	3.67	1.8			1085
400				1.10	4.22	1.8			1320
500				1.305	5.165	1.8			1520
630				1.46	6.31	1.6	6		1820
800				1.71	7.36	1.6			2105
1000				1.99	8.60	1.4			2550
1250				2.35	10.26	1.4			2900
1600				2.755	12.42	1.4			3490
2000				3.735	15.30	1.2			4220
2500				4.50	19.53	1.2			4955

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: I have a bulb that currently uses a 120V primary to 6V secondary transformer. The load is a 30Watts. I would like to know what transformer I could use to power 8 bulbs (6v 30W each) ? Thanks. How can I calculate that?: Assuming you wire the bulbs in parallel. You need a similar transformer (6v secondary) but one that is rated at 240 watts (or a bit more), 40 amps. Note that the current will be 40 amps and will need quite a heavy wire, #4 or 5. You could also put the bulbs in series, and would need a 48 volt secondary, still at 240 watts. You would have problems of any series string, if one bulb goes out, they all go out. You can also use parallel series combos, 3 pairs, or 2 strings of 3 each as a compromise. edit. Later thought of another alternative that may help. Get a transformer with a 12vCT 240W secondary. Wire like you would 2 phase house wiring, 3 bulbs to each outside terminal, and all 6 to the CT. This means the wire only has to handle 20 amps and can be smaller, and you will not have the series string problem. 12VCT transformers are fairly common. Or if you can find it, and the wiring is still a problem, get a transformer with 2 secondaries each of 12VCT at 10 amps.

Q: How we can check the output wattage of any voltage transformer? For example if we buy a voltage stabliser for television or A/C, how we can be certain that the output watts provided by the stabiliser will suit our appliance? Is there any device to check the output watts, if yes, then how to?Please help.: P over IXE Ppower in watts IIntensity in amperage Eenergy in volts voltage times amperage will give you wattage

Q: how do i work out the voltage output of the second winding on a transformer if i know the Primary voltage is 35v and the first winding has 355 windings and the second winding has 4500 how do you do this ?thanks: Assuming that the transformer is designed for a primary voltage of 35 or more, then you can simply multiply the applied primary voltage (up to the design limit) by the turns ratio and this will give you the output voltage. In this case: output voltage 35 x 4500/355 444.

Q: Can someone tell me what happened to the primes in transformers. I know Sentinel,Optimus and the fallen but what happened to the others ?: Depends on the continuity. Traditionally, there were not seven, but thirteen original Primes. Neither Optimus or Sentinel were one of the originals, whether you want to say that there are thirteen or seven. Prime is simply a title given to the leaders of the Autobots, passed down from the original transformers. Since you said seven, I'm assuming you meant movie continuity. In that case, Megatronus Prime, later to be known as The Fallen betrayed the Primes' laws of peace, hence his name. The other six used their physical forms to create a vault in which to hide the Matrix of Leadership from The Fallen. The lore from other continuities is much more interesting however. The fate of those versions of the original Primes range from death, to splitting into smaller transformers and scattering across the galaxy, to living in their own pocket dimension in peace, or to chronicling the history of Cybertron, albeit with their true identity hidden.

Q: A transformer is used to step down a voltage of 11KV to 220V. Given that the transformer has 3200 turns in the primary, calculate the number of turns in the secondary coil.Another transformer is used to further to step down 220V to 110V. its input current is 3A and the output current is 5.6A. Calculate its efficiency: Transformers work at constant voltage/turn ratio, so : V1/n1 V2/n2 n2 n1*V2/V1 3200/11000*220 64.0 turns Eff.cy 100*5.6/6.0 93%

Q: S11-1250kVA transformer oil capacity how much: I am a sales engineer for power transformers! S11-1250 / 10 / 0.4 Oil capacity: 550kg

Q: How do you use transformer efficiency in problems? Is it just VsVp(Ns/Np)(efficiency) and IsIp(Np/Ns), or is it something more complicated? Does efficiency affect both Voltage and Current?: The question contains the answers of 90 and 60, or did I miss something?

Q: I have a few power tools, none of which are natively wired for 110-240v. In particular, a portable table saw, a router, and a mitre saw, all at 220v. Since the resale value of them are so low on auction sites, I was thinking of taking them with me when I shift home to the states. Would it be safe using those tools, for extended periods, whilst running them on a transformer?: You can do that. Just make sure the transformer is rated for the power they will draw. Keep this in mind: American homes are wired with 220 volts. Only, they split the voltage into two 110 volt legs. Each leg to ground (or neutral) is 110 volts (also commonly referred to as 120 volts). But from one leg to the other is where you get the 220 (or 240) volts. My garage is wired with two legs of 110, which means I have 220 out there. I also have an outlet for 220 volts. Because some of the power tools I run demand more current, and run them simultaneously, the standard 110 outlets struggle to meet the demand. So what I did was to take a dryer cord and wire it into a pony panel where I can draw 110 volts from one leg to ground to power a table saw while the other leg powers the dust collection system. To try and run both those pieces of equipment on a single 110 line means a trip to the breaker to reset it because each draws enough power that when used together they draw more current than the circuit is safely rated for. YOU can do something similar. Just make sure you use a 20 amp outlet meant for use with 220 volts and wire into the panel (if not already wired) and set up a 220 volt plug where you will be using these power tools. Using a transformer will work, but the more you couple the power magnetically the more inefficient your system becomes, and you waste power. Also consider just buying tools rated at 110 volts. They're plentiful and cheap enough that the cost may offset the cost of shipping these 220 v tools. Throw in the cost of a transformer and you're probably spending more money in the long run. Hope this helps. '')

Q: I think the power supply to my external hard drive has failed. Is there anyway I could replace the transformer. There is no way to contact the manufacturers as they have the worst customer services ever (Formac). I have emailed them 5 days ago without a reply.: Im assuming you are just talking about a plug in adapter with the transformer built in. If you look on the face of the transformer pack it should give you a VA rating and a voltage rating. You can buy a new one as long as you match the numbers. Hope this helps.

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