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Production introduction
1.ZGS 11 combined transformer is one of the hightech products developed by our company on the basis of pad-mounted transformer.
2.Range of capacity:200-1000KVA.The product is suitable for the neutral-point insulation system or small-resistance grounding system in a 10KV distribution network,or neurtal-point solid grounding system of a three-phase four-wire system in a 400V distribution network.
3.Excellent design,reliable distribution,compact structure,light in weight,and low noise,ect;it has two types of cable outlets;ring net type and terminal type.
4.The product can be placed directly into the load center of 10KV network,thus the line loss is reduced and power distribution reliability is increased.

Performance characteristics
1.The ZGS11 combined transformer consists of high-voltage and low-voltage chambers and transformer tank in the operation chambers.
2.H.V.incoming lines in 10KV cross-linked cables are connected to load switch through knuckle connectors,straight plugs and sleeve sockets.
3.On the high-voltage side,a protection of double fuses(backup current-limiting fuse and plug-in type of fuse are used).
4.There are terminal type and ring net type high-voltage load switches for selection.
They are easy to connect,convert and reliable for power supply.
5.In the low-voltage chamber,a fixed type or drawable type is optional for the low-voltage switch cabinet according to user's requirement.Various low-voltage apparatus,such as metering and protection instruments are available.(Note:In general they are customized)
6.The oil tank is fully-sealed by corrugated radiators,which features compact and superior appearance.

Model designation


Applicable standards
GB1094.1-2-1996 Power Transformer
GB1094.3-5-2003 Power Transformer
JB/T10318-2002 Technical parameters and requirements for oil-immersed,non-crystal alloy iron core,distribution transformer.

Normal service conditions
Installation type:indoor/outdoor type
Ambient temperature:-25^oC~+40^oC
Altitude:≤1000m
Humidity:daily average value≤95%,monthly average value≤90%
Installation site:in places without corrosive gases,obvious dusts and water-vapour;the gradient is no more than 3% and no fierce shock.

Performance Characteristics
1.Compare with type "9" transformer,the product's no-load loss is reduced by 30% and thus the average annual operating costs can by reduced by 20.03%.
2.The transformer body,high voltage load switch fuses and no-excitation tapping switches are all put into the fully-sealed oil tank,which make good use of the space.Therefore,the overall size of the product is only 1/3 of that of the similar product.
3.The plug-in and out cable connection is easy for operation.
4.An obstacle protection is of two-stage fuses structure(backup current-limiting fuse and plug-in type fuse) which ensures a safe and flexible operation and more convenient for replacing of fuse.
5.The oil tank is fully-sealed,in which the oil is totally isolated from the outside.No leakage and maintenance free.
6.Excellent short-circuit proof capacity and high reliability.

Notes for placing orders
Transformer type:rated capacity kVA
Number of phases:three-phase single-phase
High voltage:kv/Low voltage:kv
Frequency:50HZ  60HZ
Tapping range:±2×2.5%±5%other
Connection group:Yyn0  Dyn11  other
Impedance voltage:4%  6%  other