6.3 kV Series Distribution Transformers

1. Transformer with conservator tank (WCT),
2. Hermetically sealed type (HST),

 Below table will help to engineers to select the best option according to environmental conditions which transformer works in:

 Meanwhile here is the advantage-disadvantage of the WCT-HST types:

• In HST type, tank pressure is more than WCT type. WCT type generally works under low pressure due to its open to atmosphere,
• In HST type, cooling/insulation oil does not contact to the air (theoretically). Therefore oil maintenance period is longer than WCT type,
• HST type transformers and their related parts generally work under higher temperature (If we evaluate WCT-HST work under same conditions).

1. Transformer with conservator tank (WCT),
2. Hermetically sealed type (HST),

 Below table will help to engineers to select the best option according to environmental conditions which transformer works in:

 Meanwhile here is the advantage-disadvantage of the WCT-HST types:

• In HST type, tank pressure is more than WCT type. WCT type generally works under low pressure due to its open to atmosphere,
• In HST type, cooling/insulation oil does not contact to the air (theoretically). Therefore oil maintenance period is longer than WCT type,
• HST type transformers and their related parts generally work under higher temperature (If we evaluate WCT-HST work under same conditions).

1. Transformer with conservator tank (WCT),
2. Hermetically sealed type (HST),

 Below table will help to engineers to select the best option according to environmental conditions which transformer works in:

 Meanwhile here is the advantage-disadvantage of the WCT-HST types:

• In HST type, tank pressure is more than WCT type. WCT type generally works under low pressure due to its open to atmosphere,
• In HST type, cooling/insulation oil does not contact to the air (theoretically). Therefore oil maintenance period is longer than WCT type,
• HST type transformers and their related parts generally work under higher temperature (If we evaluate WCT-HST work under same conditions).

1. Transformer with conservator tank (WCT),
2. Hermetically sealed type (HST),

 Below table will help to engineers to select the best option according to environmental conditions which transformer works in:

 Meanwhile here is the advantage-disadvantage of the WCT-HST types:

• In HST type, tank pressure is more than WCT type. WCT type generally works under low pressure due to its open to atmosphere,
• In HST type, cooling/insulation oil does not contact to the air (theoretically). Therefore oil maintenance period is longer than WCT type,
• HST type transformers and their related parts generally work under higher temperature (If we evaluate WCT-HST work under same conditions).