American Type Box Transformer Substation

ZGS series combined transformer is one of the high-tech products independently developed by our company, based on the technology of American pad-mounted transformer. As a common tank-type transformer, its common fuse protector, high voltage load switch (or high voltage load change-over switch), non-excited tap changers are installed in the oil tank as its components. And this product is also called American box-type transformer. (See the picture) 

1.The capacity range is 100-1600KVA. It is suitable for 10KV distribution network which is the insulated neutral system or low resistance grounding system, while the 400V system is the direct neutral point grounding system of the three-phase four-wire system. 

2.The main technology and economy index meet the internationally advanced level of the same products. 

3. The product has complete structure, reliable power supply, small volume, light weigh and low noise. 

4.It has the ring network type(ZGS-H) and terminal type(ZGs-Z) with cable output feeder. 

5.It adopts the 10KV electric network which is connected to the center of load so as to reduce circuit loss, improve reliability of power supply and beautify urban environment and it is suitable for the urban power network renovation. 

6.It adopts special connection method, which could guarantee the normal power supply of the non-fault phase of low voltage side when the fuse of one phase in the high voltage side melts. Its distinct advantages include high quality voltage, no-drifting of central point, no-heating of transformer body, low noise and good lightning protection performance. 

7.This specially designed product has the transformer body, high voltage load switch (or high voltage load change-over switch) and non-excited tap changers installed in the fully-sealed oil tank so as to greatly improve space utilization. Its volume only equals to the one third of the box-type transformer(namely European box transformer substation) with the same voltage grade and same capacity, and its weight is greatly reduced too. 

8.It possess high safety performance. The high voltage chamber is wholly insulated, and the high voltage chamber and low voltage chamber are separated but interlocked. The high voltage chamber can be opened only after opening the low voltage chamber.

9.It adopts the fault protection method of two stage fuse(current limiting fuse and plug-in fuse), which is safe, reliable and convenient for operation and easy to be replaced. 

10.Its plug-in cable terminal is convenient for operation. 

11.Its oil tank is fully sealed. No oil conservator is equipped. The oil in the tank is insulated from the outside. No leakage and maintenance need. 

12.This combined transformer is new designed based on S9 with low consumption. 

13.It has strong short-circuit resistance and overload capability. 

Parameter

S11 Double Winding Combined Non-excited Tap Changing Transformer
Rated Capacity (KVA)	Voltage group(KV)		Connection  Method	No Load  Loss(W)	Load  Loss(W)	No Load  Current(%)	Noise(dB)	Short Circuit  Impedance(%)
	High Voltage	Low Voltage
50	6  6.3 10  10.5  11	0.4	Dyn11   Yyn0	130	870	1.4	≤55	4
63				150	1040	1.2
83				180	1250	1.2
100				200	1500	1.1
125				240	1800	1
160				270	2200	1
200				340	2600	0.9
250				400	3050	0.8
315				480	3600	0.8
400				570	4300	0.7
500				680	5400	0.7
630				810	6200	0.6		4.5
800				980	7500	0.6
1000				1150	10300	0.5
1250				1360	12000	0.4

 

Load Performance Parameter
Name	Unit	High Voltage  Side	Transformer	Low Voltage  Side	0.4
Rated Voltage	KV	10
Maximum Working Voltage	KV	12
Rated Capacity	KVA		30~1250		50~4000
Rated Electric Current(Component)	A	5~630			15-75
Short Time Withstand Current	KA	12.5;16;20			1
Rated Short Circuit Withstanding Time	s	2			30-165
Peak Withstand Current	KA	20;31.5;40			5
Power Frequency Withstand Voltage	KV	35		35
Lightning Shock Withstand Voltage	KV	75		75
Rated Breaking Circuit of  High Voltage Current Limiting Fuse	KA	50
Protection Grade		IP33		Hermatically Sealed	IP33
Rated Frequency	HZ	50;60