What types of protection are done on a transformer?

Common Types of Transformer Protection

• Overheating protection.
• Overcurrent protection.
• Differential Protection of Transformer.
• Earth Fault Protection (Restricted)
• Buchholz (Gas Detection) Relay.
• Over-fluxing protection.

What is the need of protection of transformer?

The primary objective of the Transformer Protection is to detect internal faults in the transformer with a high degree of sensitivity and cause subsequent de-energisation and, at the same time be immune to faults external to the transformer i.e. through faults.

How do you stop a transformer from overheating?

Transformer ratings also provide for ambient temperatures, and when this is exceeded, a transformer may overheat. The solution in such a situation is to relocate the transformer to a different area with lower ambient temperatures, or if possible, the ambient temperature at the primary location must be reduced.

What are the transformer protection relays?

Relays for Transformer Protection

SL	Voltage Ratio and Capacity of Transformer	Common Relays
9	400/220KV 315MVA	Differential Relay Overflux Relay Buchholz Relay OLTC Buchholz Relay PRV Relay OT Trip Relay WT Trip Relay Over Load (Alarm) Relay

How are transformers maintained?

Transformer Maintenance Checks on a Monthly Basis Oil level in the oil cap must be checked on a monthly basis so that it doesn’t drop below a fixed limit and hence avoid damage due to it. Keep the breathing holes in the silica gel breather clean to ensure proper breathing action at all times.

Can a transformer overheat?

Transformers are especially susceptible to overheating because as they step up or step down voltage levels between circuits, energy is lost as heat in the core and windings. That heat can build up damaging insulation and leading to transformer failure.

What causes a transformer to get hot?

Protons attract electrons and vice-versa. The current flow of electrons and protons creates heat—simple as that. This accounts for the transformer’s warmth, and it’s similar to the warmth that exists with power supplies for computers and other electronics.