On-load tap changers type UZF

UZ type on-load tap-changers are of the single compartment, on-tank type. The selector and switching mechanisms are combined (selector switch) and are located in the main compartment with the motor drive mechanism welded to the outside. The unit is supplied fully assembled and ready to mount on the outside of the transformer tank.

Maintenance and inspection of the tap-changer are simplified since access to the active part of the tap-changer is made easy with a large, hinged door panel on the front of the compartment. The UZF model also features an angled active part with an access panel on top of the compartment. This bolted panel allows easy access to the transformer lead connections for ease of installation and/or maintenance.

Product scope

• Base technology: Conventional, resistance, on-tank, selector switch
• Common applications: Network, special, industrial

Why Hitachi Energy?

• Maintenance can be performed from ground level
• Sliding contacts for enhanced reliability
• Trouble-free maintenance as no shaft system to disassemble
• Electrically very strong; tie-in resistors are seldom needed