Resin Cast Three Phase Bushing Type Zero Sequence Current Transformer

LZZT620-10 resin cast Three phase bushing type Zero Sequence Current Transformer for protection device

Introduction

LZZT Combined bushing type current instrument transformer is suitable for current measurement and protection of distribution equipment in 35kV or 10kV AC. power system. The combined bushing type current transformer is fit for be installed at the three-phase bushings of the ring switchgears and the switches on the wire poles, It is used to the measurement and protection of the three-phase current and the zero sequence current for the three-phase bushings and the zero sequence current for the loops of the several cables.

New magnetic material amorphous alloy or permalloy is taken to be the core of the current transformer, which has high magnetic permeability, low saturation induction density and good stability. Therefore, the measuring accuracy is higher and the instrument security factor in lower. Since the high quality silicon steel sheet metal processed by advanced technology is taken to be the core of the protection windings, the accuracy limit factor will be higher.

The circular ring core and secondary windings are poured by high quality epoxies resin or polyurethane or silicon rubber in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance. The cable can cross the current transformer through its internal poles quickly and uniformly.

The current transformers can be divided several kinds according to the various current ratio, accuracy and rated loads. The specific parameters are showed in the corresponding parameter tables of every type.

Outline drawing

Wiring diagrams

A, B, C 3P one Coil CT A, B, C 3P one Coil CT+ ZCT

A, C 2P one Coil CT A, C 2P one Coil CT+ZCT

A, C 2P double Coil CT A, C 2P double Coil CT+ZCT

A, B, C 3P double Coil CT

A, B, C 3P double Coil CT+ZCT

Ordering instructions

Be sure to indicate model, current ratio, accuracy class, rated load and use of the products when designing, selecting type or purchase. Special specifications could be customized.

All kinds of current transformers of different specifications and parameters can be made according to the client's demands.

LZZT Combined bushing type current instrument transformer: 1A or 5A.Secondary winding could be tapped when necessary, namely multi-current-ratio transformer.

PARAMETERS

Beijing GFUVE Instrument Transformer Manufacturer Co., Ltd. was established in 2008. It combined design, manufacturing and sales together as one high-tech enterprise. GFUVE Instrument Transformer company mainly produces less than 35kV current transformer and voltage transformer, split core ct and current clamp models etc.

GFUVE is a leader manufacturer of split core current transformer products in China. It is professional in current transformer, potential transformer and related accessory. The product of outdoor split core current transformer develops very quickly in the global market. Our company has achieved certification to ISO9001. The products are sold to over 30 provinces in China and exported to overseas including South America, Middle East, Southeast Asia, Australia and Africa.

Please contact us now for further business relationship. We are here to provide you the best service and the best product.