... new set of equipment used in the transformation and construction of rural and urban substation. YBM, YBP series of prefabricated ... of small size, easy installation, easy maintenance, and low noise.3: Low loss, anti-theft, strong overload ability, and safe. Technical parameters ... voltage, phase-phase and phase-earth (1min)Main circuitKV2.5Control and measuring circuitKV2.07Noise level dB508Protection ...