... transformer: Professional power supply transformer used for the field of pro-amplifier, audio system, home electrical appliance, lighting, Medical ... Specifications:1 Frequency:50-60HZ2 Material :copper ,aluminum3 Power range :500VA to 5KVA4 Certificates:CE and RoHS. Standard:a. ... 120V, 230V, 240V / 50 Hz c. Secondary Customized Power range: 20VA to 10KVAd. Standard UL506, UL1411, EN61558, EN6060-1, ...