LT CT & Core Balance CT (CBCT)

Laxmi Engineering, Bhopal, manufactures LT current transformers for 660 V, special application CTs for voltage classes such as 3.3 kV and 6.6 kV, and core balance CTs, all customised to the customer's requirements. A core balance CT (CBCT) detects earth-leakage or earth-fault current and feeds it to a protection relay.

Key specifications

Parameter	Value
Products	LT CTs, special application CTs, core balance CTs (CBCT)
Voltage class	660 V, 3.3 kV, 6.6 kV and others
Design	Customised as per customer requirements
Standards	IS 16227 and IEC 61869
Testing	Designs type-tested at NABL accredited labs; in-house 400 kV impulse testing laboratory; all routine tests done in-house

Types

• LT current transformers - 660 V L.T. CTs.

• Special application CTs - A range of CTs customised according to the requirements for voltage classes 6.6 kV, 3.3 kV, 660 V and others.

• Core balance current transformers (CBCT) - Detect earth-leakage or earth-fault current and feed it to a protection relay.

Applications

• Earth-leakage / earth-fault protection: the CBCT feeds the earth-leakage or earth-fault current to a protection relay.

Special application CTs are designed to the customer's requirements. Share your application, voltage class and ratio with our sales team for a suitable design.

Frequently asked questions

Does Laxmi Engineering make LT current transformers?

Yes. Laxmi Engineering manufactures 660 V LT current transformers, and special application CTs for voltage classes such as 3.3 kV and 6.6 kV.

Does Laxmi Engineering make core balance current transformers (CBCT)?

Yes. Laxmi Engineering also manufactures core balance current transformers. A core balance CT (CBCT) detects earth-leakage or earth-fault current and feeds it to a protection relay.

Can these CTs be customised?

Yes. The range of special application CTs is customised according to the customer's requirements for voltage classes 6.6 kV, 3.3 kV, 660 V and others.

Which standards and tests apply?

The CTs are made as per IS 16227 and IEC 61869. Designs are type-tested at NABL accredited labs, all routine tests are done in-house, and Laxmi Engineering has an in-house 400 kV impulse testing laboratory at its factory in Govindpura, Bhopal.