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OLTC Fitted Transformer.
OLTC Fitted Transformer.
KVA Process Transformers Private Limited offers OLTC Fitted Transformer. This is the most modern design of High Voltage regulator used to correct the variation in HV supply voltage. These are available in three voltage range i. e. 6KV, 11KV and 33KV. This type of regulator corrects the supply voltage by means of on load tap changer switch. The Automatic Step Voltage Regulator (ASVR) are available in three types: If the variation of input high voltage is within 15-20% of the rated voltage; the step-down transformer can be provided with ON LOAD TAP CHANGER(OLTC).The voltage sensing relay of the OLTC panel choose the suitable tap automatically resulting the regulated output voltage. If the variation of input high voltage is more then 20% of the rated voltage, the OLTC is attached with a star connected high voltage auto transformer having suitable taps in addition of normal step down transformer and placed in the same cabinet. The voltage sensing relay of the OLTC panel choose the suitable tap automatically and regulated HT voltage (+ 1%) from the auto-transformer is fed to the step-down transformer. If step-down transformer without regulator had already been installed or if the capacity of the step-down transformer is very high (more then 2MVA); the regulator is made in separate cabinet. This type of regulator consists of an auto-transformer with OLTC. Regulated HT voltage from the regulator is fed to the step-down transformer.
