Support Insulators

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Purpose and description

PURPOSE: Support insulators are used as load-bearing elements for bus-bars in switchgear cabinets. They can also be used as supporting elements for terminals and winding leads of transformers and electric motors. Thanks to the properties of epoxy resin, they can operate under all service conditions, including tropical climates, and are particularly suited to locations requiring resistance to moisture, chemical influences, impulse voltages and breaking forces. Because of these properties, in addition to the applications listed, they are suitable for use in the mining and chemical industries, as well as for installation on ships.

DESCRIPTION: Support insulators are made with a basic insulation of epoxy resin, temperature class E/B (maximum temperature 125°C, with a maximum ambient temperature of 40°C). The cast-in metal parts are made of brass, making them resistant to atmospheric influences.
According to breaking force, support insulators are divided into class A insulators (3,75 kN), class B (7,5 kN) and class C (12,5 kN). Detailed technical characteristics for each type of insulator are given in the table next to each insulator.

Mounting and maintenance

MOUNTING: The insulator is mounted using the cast-in brass sleeves or bolts, depending on the type of insulator. When mounting, pay attention to bolt tightening torque, since tightening beyond the permitted value may pull out the sleeve, break the bolt, or crack the insulator.

MAINTENANCE: During operation, almost no maintenance is required. It is only necessary, during regular annual overhauls, to clean them of dirt and tighten the mounting screws and connection joints, especially for insulators installed in machines whose operation is accompanied by significant vibration.

Filters
Mounting
Voltage
Breaking force
Highest voltage for equipment
Insulators

Low-voltage support insulators

Voltage: up to 1 kV | Mounting: Indoor | Insulation: Epoxy resin

Insulators

Medium-voltage support insulators for indoor mounting

Voltage: from 3.6 kV to 38 kV | Mounting: Indoor | Insulation: Epoxy resin

Insulators

Medium-voltage support insulators with voltage indicator

Voltage: from 6 kV to 38 kV | Mounting: Indoor | Insulation: Epoxy resin

Used to detect the presence of voltage on phase conductors.

Insulators

Medium-voltage support insulators for outdoor mounting

Voltage: from 6 kV to 38 kV | Mounting: Outdoor | Insulation: Epoxy resin

Designed for operation in outdoor conditions with high levels of pollution and atmospheric contamination.