450-00-200K is a part of a Veritron voltage regulator, which is designed to maintain the accuracy and steadiness of AC voltages. It has a NEMA 1 rated enclosure for indoor use, an adjustable input voltage range of 208V to 575V, and is capable of withstanding up to 1,000 Amps. The regulator also has a power factor correction and overload protection feature, which prevents the device from being damaged in the event of a power surge. It also has an adjustable output voltage range of 230V to 460V.