Flameproof transformer

•Mining explosionproof transformer has Excellent explosion-proof performance and mechanical strength
•Special anti-loose structure with vertical lifting abilit, no inernal looseness during transportation, easy to use and maintain
•Mining transformer Adpoted cylinertype HV winding to strengthen resistance to over-voltage
•Integrated HV and LV winding, increase mechanical strength and short-circuit resistance by vacuum-pressed dipped technology
•Low-cost efficiency over the life cycle thanks to low-loss core and winding designs
•Flameproof transformer With RS485 interface for computer communication
•Maintenance-free, safe, flame retardant, explosion-proof and fireproof, no pollution, can be directly installed

Main Specifications
Transformer type	dry type
Frequency	50/ 60 Hz
Rated capacity	Up to 8000kVA
Rated voltage	Up to 11kV
Insulation class	H（180℃） , C （220℃）
Cooling mode	ANAN，GNAN
Explosion-proof type	ExdIMb
lightning impulse withstand voltage（Peak）	75kv, 60kv
Connection code	Yd, Dyn, Yyn etc.
Enclosure class	IP54 to IP65
Zone	Zone 1, Zone 2
Standard	IEC, AS, EN, IEEE/ANSI, GOST

WHY Choose VERELEN

•One of the draftersof the National Standard Mine Flameproof Mobile Substations (GB/T 8286-xxxx ), which will replace the existing national standard (GB/T 8286-2005 ) and it was submitted for trial in Beijing.
•+30 yearsexperience R&D team, derived from a 60 years of history transformer manufacturer in Changsha, Hunan, China since 1956.
•Full rangeof transformer types with customized functions are available.

For each transformer are prepared and issued a test report, in accordance with IEC 60079. except for routine tests, we also offer type tests and specialised tests to meet all customer requirements. We make what matters work for our customers in a safe and reliable way.

Varelen has launched online FAT plan for customers. Our factory can make acceptance testing ( either witnessed and on-line) in order to show all technical and quality requirements have been done before shipment.

Routine Test

Measurement of winding resistance
Measurement of voltage ratio and check of phase displacement
Measurement of short-circuit impedance and loss
Measurement of no-load loss and current
Dielectric routine tests
Tests on on-load tap-changers, where appropriate
Leak testing with pressure for liquid-immersed transformers(tightness test)
Tightness tests and pressure tests for tanks for gas-filled transformers

Type Test

Temperature-rise type test
Dielectric type tests
Determination of sound level for each method of cooling for which a guaranteed sound level is specified

Special Test

Dielectric special tests
Winding hot-spot temperature-rise measurement
Determination of capacitances windings-to-earth, and between windings
Measurement of dissipation factor(tanδ) of the insulation system capacitances
Determination of transient voltage transfer characteristics
Measurement of zero-sequence impedance(s) on three-phase transformers
Short-circuit withstand test

Recommend related products

Flameproof dry type transformer

Characteristics

•Strong thermal shock resistance
•Large overloading capacity
•Excellent explosion-proof performance

Areas of application

Varelen Transformers is a global leader transformers with a longstanding commitment to designing and building quality and correct transformers for the mining industry. mining transformers are designed in compliance with applicable standards, technical specifications and customer requirements. Mining explosionproof transformers are designed for use in flame-proof, solid enclosures which are often transported on large mining machines.