Oil-immersed power transformer of 35kV

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Oil-immersed power transformer of 35kV

1. Product

S9 series power transformer of 35kV is mainly used for the transmission and distribution in the power system of voltage level 35kV and rated frequency 50-60Hz, the capacity of it is 50-31500kVA. The iron core adopts silicon steel sheet with high permeability, full-oblique joints, no punching, and colligated and taken up with semi-dry epoxy fiberglass banding. The fuel tank has three types of radiators: flat tube type, corrugated type and chip type. The 800kVA above transformers are equipped with gas relay, pressure relief valve, oil tank with diaphragm and remote thermometer components.

The transformers of 3150kVA and above are equipped with oil refiner. The characteristics of products are low loss, low noise, save power and so on.

SZ9 series on-load-tap-changing power transformer of 35kV is equipped with tap changer, the voltage regulating range of it is ± 3 × 2.5%. The voltage adjustment can be controlled by manual or automatic through control box. The structures,performances and characteristics of the transformer are as the same as the power transformer of S9 series for 35kV.

The products conform with the GB/T6451-2008 standards.

2. Technical parameter

35kV S9 series distribution transformer technical parameter

Model	Rated Capacity （kVA）	Rated voltage （kV）		Loss （W）		Impedance of short-circuit（%）	No-load current（%）	Label number of connecting group	Weight （kg）			Outside DimensionL x W x H（mm）	Gauge （mm）
Model	Rated Capacity （kVA）	HV	LV	No-load	load	Impedance of short-circuit（%）	No-load current（%）	Label number of connecting group	Body	Oil	Ttotal weight	Outside DimensionL x W x H（mm）	Gauge （mm）
S9-50/35	50	38.5±5% 35±5%	0.4	0.21	1.27/1.21	6.5	2.0	Yyn0 Dyn11	345	260	820	1140×955×1760	550/550
S9-100/35	100			0.29	2.12/2.02		1.8		408	390	1070	1180×1070×1910	550/550
S9-125/35	125			0.34	2.50/2.38		1.7		415	470	1100	1180×1090×2000	550/550
S9-160/35	160			0.35	2.97/2.83		1.6		423	555	1295	1180×1100×2035	550/550
S9-200/35	200			0.43	3.50/3.33		1.5		524	655	1540	1260×1150×2075	550/550
S9-250/35	250			0.51	4.16/3.95		1.4		550	825	1755	1330×1200×2155	660/660
S9-315/35	315			0.61	5.01/4.77		1.4		640	945	2010	1390×1250×2220	660/660
S9-400/35	400			0.73	6.05/5.76		1.3		740	1125	2390	1720×1260×2285	660/660
S9-500/35	500			0.86	7.28/6.93		1.2		805	1289	2710	2045×1290×2415	660/660
S9-630/35	630			1.04	8.28		1.1		885	1455	3040	2155×1320×2250	820/820
S9-800/35	800			1.23	9.90		1.0		1050	1800	3700	2265×1340×2700	820/820
S9-1000/35	1000			1.44	12.15		1.0		1335	2115	4510	2495×1380×2885	820/820
S9-1250/35	1250			1.75	14.67		0.9		1445	2610	5045	2595×1410×2910	1070/1070
S9-1600/35	1600			2.12	17.55		0.8		1490	2840	5740	2680×1590×2970	1070/1070

Note： Load values before “/” are for Dyn11 connection and values after “/” are for Yyn0 connection.

35kV no excitation voltage regulating power transformer technical parameter

Type specification	Rated Capacity kVA	Rated voltage（kV）		Loss （W）		Impedance of short-circuit （%）	No-load current（%）	Label number of connecting group	Weight（kg）			Outside DimensionL x W x H （mm）	Gauge（mm）
Type specification	Rated Capacity kVA	HV	LV	No-load	load	Impedance of short-circuit （%）	No-load current（%）	Label number of connecting group	Body	Oil	Total weight	Outside DimensionL x W x H （mm）	Gauge（mm）
S9-800/35	800	38.5±5% 35±5%	3.5 6.3 10.5	1.23	9.9	6.5	1.0	Yd11 Ynd11	1150	1800	3900	2265×1340×2700	820/820
S9-1000/35	1000			1.44	12.15		0.9		1335	2115	4510	2495×1380×2885	820/820
S9-1250/35	1250			1.76	14.67		0.8		1445	2610	5045	2595×1410×2910	1070/1070
S9-1600/35	1600			2.12	17.55		0.7		1490	2840	5740	2680×1590×2970	1070/1070
S9-2000/35	2000			2.72	19.35		0.6		1574	3280	6410	2690×1620×3100	1070/1070
S9-2500/35	2500			3.20	20.70		0.56		1885	3860	7695	2730×1900×3000	1070/1070
S9-3150/35	3150			3.80	24.30		0.56		2145	4610	8980	2660×2900×3100	1070/1070
S9-4000/35	4000			4.52	28.80		0.48		2270	5330	10060	2800×2865×3365
S9-5000/35	5000			5.40	33.03		0.48		2580	6330	11670	3460×2940×3430
S9-6300/35	6300			6.56	36.90		0.42		2840	7440	13430	3800×2770×3355
S9-8000/35	8000			9.00	40.50		0.42		3500	9650	17200	4400×3000×3520
S9-10000/35	10000			10.88	47.70		0.40		4400	12200	21000	3800×3550×3750
S9-12500/35	12500			12.60	56.70		0.40		5000	13740	24500	4500×5650×3900
S9-16000/35	16000			15.20	69.30		0.40		5520	16800	27800	4800×3700×4050
S9-20000/35	20000			18.00	83.70		0.32		5900	19020	31100	5240×3830×4040
S9-25000/35	25000			21.38	99.00		0.32		7200	23400	37600	5520×3800×4460
S9-31500/35	31500			25.28	118.80		1.0		7660	26080	42200	5660×3800×4590

35kV 2000~12500kVA load voltage regulating power transformer technical parameter

type Specification	Rated Capacity(kVA)	Rated voltage (kV)	Loss (kW)		Impedance of short-circuit(%)	Label number of connecting group	Weight(kg)			No-load current （A）
type Specification	Rated Capacity(kVA)	Rated voltage (kV)	No-load	Load	Impedance of short-circuit(%)	Label number of connecting group	Body	Oil	Total weight	No-load current （A）
SZ9-2000/35	2000	35	2.88	20.25	6.5	Yd11	2.9	20.25	0.9	0.80
SZ9-2500/35	2500	35	3.40	21.73	6.5		3.44	21.74	0.9	0.80
SZ9-3150/35	3150	38.5 35	4.04	26.01	7.0		4.09	26.0	0.81	0.72
SZ9-4000/35	4000		4.84	30.69			4.95	30.7	0.81	0.72
SZ9-5000/35	5000		5.80	36.00			5.85	36.0	0.77	0.68
SZ9-6300/35	6300		7.04	38.70		YNd11	7.02	38.7	0.77	0.68
SZ9-8000/35	8000		9.84	42.75	7.5		10.0	42.7	0.68	0.60
SZ9-10000/35	10000		11.60	50.58	7.5		11.7	50.6	0.68	0.56
SZ9-12500/35	12500		13.68	59.85	8.0		13.77	59.85	0.63	0.54

Q: 50KVA transformer maximum load is how much?: Transformer output power is apparent power, and active power (KW) relationship: apparent power = active power × power factor. The average power factor of 0.8, 50 KVA transformer can be load power (50 KVA × 0.8) 40KW of active power.

Q: I have a packaged heat pump w/ Emergency Heat that is not working and does not come on at all. No lights or anything even when I switch it to emergency heat. Someone said that it could be my low voltage transformer. What is that and how do I check it?: A low voltage transformer on an a/c and heat system is a device that lowers the line voltage down to a safe 24 volts to run in control wiring to your thermostat to control your system. If your thermostat has a removable cover where you can see the wires underneath it is easy to see if you have no low voltage as long as you have a volt meter that can measure 24 volts ac. Make sure the thermostat is off and measure the voltage from R to any other terminal and you should read 24 volts nominal (more likely somewhere around 27) If you don't read 24 volts minimum you have a problem in the low voltage circuit. Most heat pumps will have some kind of low voltage protection such as a fuse or small circuit breaker in the unit so it doesn't necessarily mean the transformer is blown. The more important thing is to find the reason that caused it and that requires thorough understanding of the system. It's really best to have a technician diagnose this kind of problem.

Q: BQ: Which director do you like more: Michael Bay or Steven Spielberg?BQ2: Are you excited about Transformers 3 or worried that it can be not good?thanks :)))) lt;3: I would say Transformers, only because of the modernity to it and special effects. Indy's good, but it's getting old and it hasn't really got the thrill and emotion of Transformers. Spielberg has done some good films though, Jaws, Close Encounters, War of The Worlds, E.T to name but a few, unfortunately, Indy isn't one of his better movies. As, he produced Transformers and Bay is a great director (you can actually believe that LaBeouf is Sam Whitwicky and that, it could possibly happen the way Bay directs it, plus he gets the emotion and anger.), I would have to say Transformers, though Spielberg is, still, my favourite director. I can't wait for Dark Of The Moon though, it looks to be good, though it will be hard to beat the second film in my opinion.

Q: I have been reading about pulse transformers and i am curious if there exists a pulse transformer that would take 1 pulse/second or even less and convert to very low voltage high current. If not, would it be possible to make one? Any info is very appreciated! Thx!: Pulse transformers can be wound to any turns ratio that is desired. That being said pulse transformers have small cores and therefore handle small amounts of power. You can find cores on those old mother boards that are no longer in service and junk computer power supplies also have a couple of cores. These toroids were normally used as filter inductors to remove spikes from DC or low frequency lines. You can easily rewind them for pulse transformers.

Q: I heard that a transformer is like a ratio device for amps and volts, but I know there must be more to it. How exactly does it work, and what happens when it doesn't have enough current, but enough voltage?: A transformer is a pretty simple device, it consist of two or more windings around a iron or ferret core. First keep in mind only AC works in a transformer. Transformers work by the primary winding generating a magnetic flux in the core. The second winding will pick up this flux and convert it back to voltage. Note: Michael Faraday in 1831 discovered this interaction which made transformer, motors and generators possible. Basic rule: Power in Power out - some losses. The ratio of the turns on the primary to the secondary will determine the increase. ie 10 turn on a primary and 100 turn on a secondary will step the voltage up x 10. The turns ratio control the step up or step down of the transformer. More winding on the secondary than the primary will cause a step up of voltage, Less winding will step down. The current carrying capacity of the transformer is controlled by the size of the wire. If you exceed the current carrying capacity you will burn out the winding. Heaver wire can handle more current. I know you have been interested in High Voltage step up transformers. The most voltage a transformer can produce is about 12KV. Usually after that it become extremely difficult to isolate the wires in the secondary to keep the current from jumping from one winding to another and burning out the transformer. The way to step up the voltage after the transformer is to use a voltage multiplier cascade.

Q: I know there has been plenty of Transformers anime over the years, but is there any Transformers manga?: I don't know but that'd be sweet!

Q: I wa watching the films and was wondering how the transformers just spawn more and more. For example soundwave made the panther thing then it made the thin robot and all those construction guys too, then they made the huge robot with the balls.: Haha, well from what I remember, the bodies were assembled on cybertron. But that wasnt it. In order to create actual life the transformer needed The Matrix, an orb (or in the live action movies, a slender metal thingy?) which would allow a spark from the Allspark (which is essentially transformer heaven if I remember correctly) to enter the body and give it life. This can also reanimate deceased Transformers. The only other times I remember transformers coming to life in the show, is when the autobots found the Dinobots and somehow brought them back to life? Then there was the world eater, Unicron, who was able to upgrade other transformers. An example would be the transformation of Megatron into Galvatron made possible by Unicron.

Q: I have a 34kv/380/500KVA transformer and it loads a pump of 450HP/2200V. Starting current reaches up to 1700 amps for around 3-4 seconds using a soft starter. The rated capacity of the transformer is 700amps and the pump running current is 689 amps.Any calculations to prove that the transformer is enough to provide the application would be a help.thanks.: 500 kVA ÷ 0.380 kV ÷ √3 760 amps The nameplate rating (kVA) of a transformer is designed for 50% insulation life after being loaded to nameplate kVA and running with a top oil temperature of 110 °C for 20.55 years. (180,000 hours) Since your ambient temperature is not constant, and the equipment does not run continuously, the transformer's insulation will last far longer. In most real world applications, if a transformer is not loaded to nameplate, it will theoretically last for more than 100 years. Many electric utilities load their transformers beyond nameplate to take advantage of this overly long life. Motor Inrush: As for the motor starting inrush, the missing factor is how often the motor starts. If it is only seeing an inrush once an hour, the transformer can handle an inrush of 4x nameplate. Your motor's inrush of 1700 amps is 1700 ÷ 760 2.2 times nameplate. According to a transformer manufacturer's table, a transformer can handle an inrush of 2.2 times nameplate more than twenty times an hour. I highly doubt this 450 HP motor is starting and stopping every three minutes. You are good to go with the 500 kVA transformer.

Q: about transformers: Leaving aside the double negative, the problem is your use of cancel - what do you expect - that it will go back to the generator and kill it? The transformer produces an output voltage which tries to do work against a resistance or inductance - the work it does produces a back EMF which the supply voltage works against so the generator has to do work. If there were no EMF in the primary, it would behave like a short circuit and blow the circuit - which is does in a small scale in the starting surge that you have to allow for when turning on equipment.

Q: Every yellow vehicle we pass on the road is BUMBLEBEE!!! and big trucks are opinus PWIME! And, he is constantly singing Twansfomahs, more dan meets dah eye! LOL So, I wanted to find him something for Easter that was transformers related, but as it's Easter, and NOT Christmas, I don't want to spend a lot of money. Suggestions?: Coloring books or stickers, the bookstores have lots of transformers books.

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