The KP 5 (25) A switching block is designed for installation and dismantling of three-phase electricity meters of transformer-connected current at the metering point without disconnecting the voltage. The terminal block allows measuring current and voltage without disconnecting the load and disrupting electricity metering by the meter connected to the terminal block. The terminal block is intended for use in any field. The terminal block is designed for installation in closed rooms without aggressive moisture, dust and gases.