Prefabricated Substation

: http://dry-transformer.com/4-unit-substation.html

The YB series prefabricated substation is designed and manufactured according to IEC standard. It is mainly made up of the enclosure, transformer,low voltage switchgear and high voltage switchgear.

This novel style electrical substation offers small size, aesthetical appearance, reliable and safe operation, low maintenance and convenient installation. It is often used in the electrical distribution system for mines, oil fields, factories, commercial buildings, high rise buildings, temporary construction sites, as well as residential buildings in rural and urban areas.

Features
1. The enclosure for the prefabricated substation is designed to be ventilative and thermal insulating. It can effectively prevent intrusion of small animals and is convenient for maintenance. According to clients’ demands, the enclosure can be engineered from varied materials, such as metal plate, composite board, and high strength concrete slabs. All metal materials for the substation construction undergo anticorrosive treatment to avoid rustiness in long run.

2. The high voltage side typically employs the pressure type load switch, vacuum load switch, and the SF6 insulated load switch. It comes with a series of protection functions for enhanced safety. The prefabricated substation can be fitted with oil immersed transformer or dry type transformer. The low voltage side utilizes various style of frame-type circuit breaker, molded case circuit breaker, load switch and disconnecting switch.

3. The distribution substation comes with a complete range of protection functions. Optional designs are the high and low voltage measuring device and the automatic reactive power compensation system.

4. Available with temperature control and air ventilation systems, the prefabricated substation can be used in various areas. It can be additionally fitted with a heater to meet the application demands in chilly and high humidity areas.

Technical Specifications

High voltage unit	Rated frequency	Hz	50
	Rated voltage	kV	6	11	33
	Max. working voltage	kV	6.9	11.5	40.5
	Power frequency withstand voltage	kV	32/36	42/48	95/118
	Phase to earth, phase to phase / longitudinal withstand voltages	kV
	Lightning impulse withstand voltage	kV	60/70	75/85	185/215
	Phase to earth, phase to phase / longitudinal withstand voltages	kV
	Rated current	A	400/630
	Rated short-time withstand current	kA	16 （ 4s) 20(2s)
	Rated peak withstand current	kA	50
Low voltage unit	Rated voltage	V	380/220
	Rated current of main circuit	A	20 ～ 3000
	Rated short-time withstand current	kA	15-30-50
	Rated peak withstand current	kA	30-60-110
	Branch current	A	10 ～ 800 ～ 1600
	Number of loop in branch circuit	路	2-4-8 -12
	Compensation capacity	kVar	0 ～ 320
Transformer	Rated capacity	KVA	30 ～ 2000
	Short circuit impedance	%	4.0/4.5/6.5
	Tapping range	%	±5; ±2x2.5
	Vector Group		Yyn0:Dyn11

Remark:
1. Compact substation includes an oil-immersed transformer.
2. Cabinet material
1) Steel (galvanized or electroplated plate)
2) Stainless steel
3) Aluminum alloy
4) Galvanized steel with fire-retardant foam composite panels
5) Alkali-resistant fiber glass reinforced plate
3. User Instruction

Environmental Conditions

Dimensions