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UAVR (SHAP) type switchboards are designed for automatic switching to backup power for lighting circuits and power electrical equipment in case of a loss of normal power supply voltage. The circuit returns to its original state automatically when normal power is restored. SHAPs are separate, wall-mounted cabinets. The design of SHAPs allows for cable entry from both the bottom and the top. SHAP-23…SHAP-63 switchboards are equipped with EL phase monitoring relays, designed to monitor the permissible voltage level and phase sequence in three-phase voltage systems, to protect against unacceptable phase voltage asymmetry and operation on two phases, as well as against phase failure. The EL relay has an adjustable time delay for operation, ranging from 0.1 to 10 seconds. SHAP switchboards are manufactured using both domestic and imported equipment. The warranty service period is 18 months.