Dry type isolating transformer

with earth screen ,provide galvanic isolation between input and output windings

Power capacity, Input voltage and output voltage can be customized

Maintenance-free, easy to install, low comprehensive operating cost

Low loss, small noise, heat dissipation ability

Isolate dangerous voltages

Non grain core design for low remanence flux density for applications with specific in-rush current requirements

Dry type Air natural transformers are available with PT100 temperature probe and controller

Related product parameters

Main Specification
Type	isolating step down
Capacity	15 - 2500kva (can be customized)
Voltage	415V ( can be customized)
Phase	3
Winding material	Copper and Aluminum available
Insulation class	F (155°C) / H(180°C)/ C(220°C)
Attitude	1000m , 2000m
Cooling	AN
Frequency	50 /60Hz
Protection class	IP21
Standard	IEC 60076
Vector group	Dyn11
Efficiency	98%
Noise level	60dB
Service life	30 years

Routine Test

a) Measurement of winding resistance

b) Measurement of voltage ratio and check of phase displacement

c) Measurement of short-circuit impedance and load loss

d) Measurement of no-load loss and current

e) Separate-source AC withstand voltage test

f) Induced AC withstand voltage test

g) Partial discharge measurement

Type Test

a) Lightning impulse test

b) Temperature-rise test

Special Test

a) Partial discharge measurement

b) Measurement of sound level

c) Short-circuit test

Isolation transformer is mainly used for industrial machines, laboratory equipment, meters and instruments, medical devices, Coal mine, and so on.