50HP LENZE MCH SERIES NEMA1 VFD 400-480VAC 3PH INPUT MH4500B. Manufactured by LENZE. Model number: MH4500B. This variable frequency drive (VFD) is designed for precise motor speed control. Features include adjustable frequency output, built-in protection, and easy installation. Suitable for industrial and commercial motor control applications. High quality industrial product with reliable performance.