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Photovoltaic / Wind power pad-mounted transformer

Product Introduction

The structure of the pad-mounted transformer is divided into six parts: the transformer main body, high-voltage chamber, low-voltage chamber, detection chamber, switch operation chamber, and fuse chamber. It can be arranged in the shape of MU or PIN.
The high-voltage side adopts a terminal-type load switch with a fuse for protection, and the fuse is a full-range current-limiting protection fuse.
The load switch and fuse are installed in the transformer oil tank, and the insulating oil of the transformer is used as the insulating medium and heat dissipation medium. Overall, it has the advantages of a compact structure and good heat dissipation performance.
The outgoing line on the high-voltage side adopts a high-voltage dry-type bushing to support the copper busbar structure, which facilitates the connection of multiple cables. The outgoing line on the low-voltage side can be directly led out or configured with a low-voltage outgoing line scheme according to user requirements.
The door of the pad-mounted transformer adopts a windproof hinge. All doors on the cabinet open outwards, with an opening angle of not less than 90°, and are equipped with a positioning device. The doors are all sealed, fitted with door gaskets, have a buffering function, and are equipped with handles. The hidden doors are rainproof, anti-blocking, rust-proof, and anti-damage.

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Voltage

Rated voltage on the high-voltage side	6kV, 12kV, 24kV, 35kV, 36.75kV, 38.5kV
Rated voltage on the low-voltage side	0.27kV, 0.3kV, 0.315kV, 0.4kV
Rated frequency	50Hz
Number of phases	Three-phase
Protection class	Oil tank IP68, high and low-voltage chambers IP54, IP3X when the high-voltage chamber door is open

Technical Parameters of Conventional Transformers

Transformer Capacity	High-Voltage Combination and Tap Range			Connection Group Label	CNo-Load Loss	Load Loss	Impedance
kVA					kW	kW	%
	High Voltage	Tap Range	Low Voltage
	kV	%	kV
500 - 1600	6, 12, 24, 35	braise 2 脳 2.5	0.315, 0.27	Yd11, d11	As per customer requirements	As per customer requirements	6.5
500 - 1600	36.75, 38.5		0.3, 0.4	Yd11, d11	As per customer requirements	As per customer requirements	6.5

Technical Parameters of High-Voltage Oil-Immersed Load Switches

Item	Parameter
Model	BYFI-12 (Manual Operation)	BYFI-40.5 (Manual Operation)
Voltage Class (kV)	12	40.5
Power Frequency Withstand Voltage (kV)	35	95
Lightning Impulse Voltage (kV)	75	200
Rated Current (A)	630	630
Rated Short-Time Withstand Current and Time (kV) / 2s	20	20
Breaking Current Capacity (A)	630	630
Mechanical Life	2000 times	2000 times

Technical Parameters of High-Voltage Oil-Immersed Fuses

Item	Parameter
Model	XRNT-12	XRNT-40.5
Rated Current of Fuse (A)	125	40
Rated Current of Fuse Element (A)	50 (500kVA, 630kVA)	16 (500kVA, 630kVA)
Rated Current of Fuse Element (A)	100 (1000kVA, 1100kVA, 1250kVA)	31.5 (1000kVA, 1100kVA, 1250kVA)
Short-Circuit Breaking Current of Fuse (kA)	31.5	31.5
After the fuse blows, the fuse wire can be conveniently replaced on site.

Technical Parameters of High-Voltage Lightning Arrester

Item	Parameter
Model	YH5WZ-17/45	YH5WZ-51/134
Type	Gapless Metal Oxide Lightning Arrester	Gapless Metal Oxide Lightning Arrester
Rated Voltage (kV)	17	51
Continuous Operating Voltage (kV)	13.5	40.8
DC 1mA Reference Voltage (kV)	≥ 24	≥ 73
Nominal Discharge Current (kV) (Peak Value)	≥ 10	≥ 5
Residual Voltage of Nominal Discharge Current (kV) (Peak Value)	≤ 45	≤ 134
2ms Square Wave Current Withstand Value (A) (Peak Value)	150	600-800