Auto Transformer Protection Clause Samples
The Auto Transformer Protection clause outlines the requirements and measures for safeguarding auto transformers from electrical faults and operational hazards. It typically specifies the types of protective devices to be installed, such as relays, circuit breakers, and surge arresters, and details the conditions under which these devices should activate to isolate the transformer from the system. By establishing clear protection protocols, this clause helps prevent equipment damage, ensures system reliability, and minimizes downtime due to transformer failures.
Auto Transformer Protection. These shall have the following protections:
i) Numerical Differential Protection
ii) Numerical Restricted Earth Fault Protection
iii) Numerical Back-up Over-Current and Earth Fault Protection on High Voltage (HV) and Intermediate Voltage (IV) side
iv) Numerical Over Fluxing Protection on HV and IV side
v) Numerical Overload Alarm Further, Numerical Back-up Over-current and earth fault protection on HV and IV side of autotransformer shall not be combined with other protective functions in the main relays and shall be independent relays. Besides these, power transformers shall also be provided with ▇▇▇▇▇▇▇▇ relay, Magnetic Oil Gauge (MOG) with low oil level alarm, protection against high oil and winding temperature and pressure relief device etc. Suitable monitoring, control (operation of associated circuit breaker and isolator) and protection for LT auxiliary transformer connected to tertiary winding of auto- transformer for the purpose of auxiliary supply shall be provided. The over current and other necessary protection shall be provided for the auxiliary transformer. These protection and control may be provided as built-in feature either in the bay controller to be provided for the auxiliary system or in the control and protection IEDs to be provided for autotransformer.
Auto Transformer Protection. These shall have the following protections:
Auto Transformer Protection. These shall have the following protections:
i) Numerical Differential protection
ii) Numerical Restricted earth fault protection
iii) Numerical Back-up Over-current and earth fault protection on HV & MV side
Auto Transformer Protection. These shall have the following protections:
i) Numerical Differential protection
ii) Numerical Restricted earth fault protection
iii) Numerical Back-up Over-current and earth fault protection on HV and MV side
iv) Numerical Over fluxing protection on HV and MV side
v) Numerical Over load alarm Further, Numerical Back-up Over-current and earth fault protection on HV and MV side of auto transformer shall not be combined with other protective functions in the main relays and shall be independent relays. Besides these, power transformers shall also be provided with ▇▇▇▇▇▇▇▇ relay, Magnetic oil Gauge (MOG) with low oil level alarm, protection against high oil and winding temperature and pressure relief device etc.