Rated control power voltage (Us) of shunt release TKB6 SH is AC 50Hz, 24V to 110V, 110V to 400V, DC 24V to 60V, 110V to 220V. When applied power voltage is within range of 70% to 110%, shunt release can act reliably to make the

breaker break.

 

TKB6 UV under-voltage release are 230V, 400V respectively.

When applied voltage is within range of 70%Ue to 35%Ue,

under voltage  release can act to make the breaker trip. When

applied voltage is lower than 35%Ue, release can prevent the

breaker from making; when applied voltage is within range of

85% Ue to 110%Ue, release can ensure that breaker works

normally.