YBM-120.4 European Box Transformer

Product Introduction

YBM-12/0.4 European style box transformer is a prefabricated complete set of substation equipment, which combines high-voltage switchgear, distribution transformers, and low-voltage distribution equipment in a metal shell, suitable for terminal distribution of 10kV system ring network and radial power grid supply. This device is widely used in urban high-rise buildings, residential communities, small and medium-sized factories, mines, oil fields, and temporary construction power supply places.

Application

: Urban architecture and residential areas
As the core equipment of the power distribution system, it meets the electricity needs of residents and businesses.

: Industry and Mining
Provide stable power supply for factories and mines.

: Temporary construction
Easy to deploy and move quickly, meeting temporary electricity needs.

: Public facilities
Ensure the stable operation of public facilities such as stations, ports, airports, etc.

: Compact structure and small footprint
The European style box transformer adopts a compact design, with a small volume and a footprint of only 1/10 to 1/5 of traditional substations. Its internal structure is usually arranged in a "eye" or "pin" shape.

: Fully insulated and fully sealed design
The internal equipment of the transformer adopts a fully insulated structure, and the shell is grounded to ensure safe and reliable operation and avoid electric shock accidents. The equipment casing is made of aluminum zinc coated steel plate or stainless steel material, which has good anti-corrosion performance.

: Flexible wiring scheme
The high-voltage side can adopt various methods such as ring network power supply, terminal power supply, or dual power supply, while the low-voltage side supports multiple functions such as power distribution, lighting distribution, and reactive power compensation.

: Intelligence and automation
Equipped with a microcomputer integrated automation system, it supports remote monitoring and management, and can achieve the "four remote" functions (telemetry, remote signaling, remote control, remote adjustment), meeting the requirements of unmanned operation.

Parameter

Category	Item	Unit	Technical parameters
High voltage unit	Rated frequency	Hz	50
	Rated voltage	KV	7.2	12	40.5
	Rated current of main busbar	A	630/1250/1600
	Rated short-time withstand current/time	KA/S	20/4 25/3 31.5/4
	Rated peak withstand current	KA	50/63/80
	1-minute power frequency withstand voltage (to ground/fracture)	KV	21/36	42/48	95/115
	Lightning impulse withstand voltage (to ground/fracture)	KV	50/70	75/85	185/215
	Rated short-circuit breaking current	KA	20/25/31.5
	Short term withstand current of grounding circuit	KA/S	20/2 20/4
	Rated short-circuit photosynthetic current of the main circuit	KA	50/63/80
	Rated active load breaking current	A	630
	Rated closed-loop breaking current	A	630
	Rated cable charging breaking current	A	10
	Rated breaking capacity of no-load transformer	KVA	1250
	Rated transfer current	A	1700
	Mechanical lifespan	Time	3000	5000	10000
Low voltage unit	Rated frequency	Hz	50
	Rated voltage	KV	0.4/0.23
	Rated insulation voltage	V	690
	Rated current of main circuit	A	100-3200
	Rated short-time withstand current	KA/S	30/1 50/1 100/1
	Rated peak withstand current	KA	63/105/176
	5S power frequency withstand voltage	KV	2.5
	Lightning impulse withstand voltage (to ground/fracture)	KV	6/8
Transformer unit	Item		Oil immersed type
	Rated frequency	Hz	50
	Rated voltage	KV	12(7.2)/0.4(0.23)
	Rated capacity	KVA	30-1600
	1-minute power frequency withstand voltage	KV	35(25)	28(20)
	Lightning impulse withstand voltage	KV	75(60)
	Impedance voltage	%	46
	Tap range		±x2.5%/±x5%
	Connection group		Y,yn0,yn11
Box body	Protection level of high and low voltage chambers		IP33D
	Protection level of transformer room		IP23D
	Sound level (oil immersed/dry)	db	<50/55
	Secondary circuit withstand voltage level	KV	1.5/2

Box type transformer

YBM-120.4 European Box Transformer