Substation instrument transformers

These ring type current transformers are available for indoor (ORX) or outdoor use (OREX). They have been designed to meet the requirements for measuring:
- line currents
- zero-sequence currents in the neutral of power transformers
- earth fault currents in power transformers.

The secondary terminals are accessible, either directly in the case of indoor equipment (ORX), or through a watertight terminal box in the case of outdoor application (OREX). Several types of terminal boxes are available depending on the required characteristics.

The change to newer, faster and more selective protective system makes it necessary to replace existing current transformers with different output, class, ratio, number of secondaries to suit the needs of the new protection.

The best solution is to use split-core current transformers on insulated cables or outside single phase metalclad units. This solution is very economical because:

- It is not necessary to dismantle and remake the cable sealing ends on the metalclad units.

- There is no need to recommission and test the main equipment.

- It reduces the risk of damage and the length of outages at reduced costs.

These current transformers are avalaible for indoor use (CRF) or outdoor use (CRFE).

Single or double pole outdoor voltage transformer vacuum moulded in self extinguishing epoxy resin for the measure of AC voltages between phases or between phase and earth up to 36 000 V.

Available with rated outputs up to 50 VA cl0,5 or 100 VA cl1. They are equipped with a weatherproof terminal box fitted with 2 cable glands.

This range is also suitable for the power supply of auxiliaries up to 2 500 VA clA.

1-pole voltage transformer vacuum moulded in self extinguishing epoxy resin for the measure of AC voltages between phase and earth up to
36 000/√3 V.

This series also allows for feeding auxiliaries up to 2 000 VA clA. The secondary terminals are protected by a weatherproof cover equipped with cable glands.

The EGISA and EGTA transformer surfaces are coated with a metallic compound that ensures a safe repartition of the magnetic field and zero-potential surface.

An optional anti-explosion system prevents any resin or hot gas projection in the event of external failure (line overvoltage, ferro resonnance, mechanical shock, etc.)

Series reactors or selfs for medium voltage capacitor banks.

These reactors are encapsulated in epoxy resin. They have no magnetic core. Series reactors are used to modify line impedance. Selfs do limit network short circuit inrush current.

The change to newer, faster and more selective protective system makes it necessary to replace existing current transformers with different output, class, ratio, number of secondaries to suit the needs of the new protection.

The best solution is to use split-core current transformers on insulated cables or outside single phase metalclad units. This solution is very economical because:

- It is not necessary to dismantle and remake the cable sealing ends on the metalclad units.

- There is no need to recommission and test the main equipment.

- It reduces the risk of damage and the length of outages at reduced costs.

These current transformers are avalaible for indoor use (CR) or outdoor use (CRE).

Outdoor current transformers vacuum moulded in self extinguishing epoxy resin for the measurement of AC currents up to 14 000A.

They are equipped with a weatherproof terminal box fitted with 2 cable glands.

Coming soon!

2-pole voltage transformer vacuum moulded in self extinguishing epoxy resin for the measure of AC voltages between phases up to 36 000 V.

This series also allows for feeding auxiliaries up to 1 400 VA clA.

The UGISA transformer surface is coated with a metallic compound that ensures a safe repartition of the magnetic field and zero-potential surface.

An optional anti-explosion system prevents any resin or hot gas projection in the event of external failure (line overvoltage, ferro resonnance, mechanical shock, etc.)

In addition to excellent mecanichal strength, these insulators have a high resistance to corrosive atmospheres and fire. They can be installed in any position.