A breaker disconnects a circuit when it detects overload or a short circuit. It is a safety device, so repeatedly resetting it without finding the cause is dangerous.
Unplug high-power appliances. If the breaker still trips, there is a burning smell or heat damage is visible, leave the circuit off and call an electrician.
A specialist can measure load and insulation resistance, inspect connections and propose a safe repair. Never fit a higher-rated breaker without checking the cable.
When booking an electrician in Kyiv, say which breaker trips, which appliance was running and whether you noticed heat or a burning smell. Do not repeatedly energise a circuit with short-circuit symptoms.