Indoor disconnectors with earthing switch, Through-wall indoor disconnectors with earthing switch

Indoor disconnector with earthing switch 12 kV 630 A version II

Indoor disconnector with earthing switch 12 kV 630 A version III

Through-wall indoor disconnector with earthing switch 12 kV 630 A version III

A disconnector is a three-pole electrical device with a visible isolating distance of the electrical circuit in the air, designed (together with an operating mechanism) for disconnecting and connecting sections of a high-voltage electrical circuit under voltage in the absence of load current or for changing the connection scheme:

for the safe performance of work on the disconnected section;

for switching on and off the charging currents of overhead and cable lines and the no-load current of transformers.

An earthing switch is a three-pole electrical device designed for earthing disconnected sections.

An operating mechanism is designed for manual switching on and off of disconnectors and earthing switches.

Disconnectors and earthing switches are installed in three-phase alternating current networks with an industrial frequency of 50 Hz and a voltage of 7.2 and 12 kV.

Indoor disconnectors, earthing switches, and operating mechanisms are designed to operate at an altitude of up to 1000 m above sea level at an ambient air temperature from +40°C to -60°C, in rooms with natural ventilation without artificially controlled climatic conditions. The room where the disconnectors (earthing switches) and operating mechanisms are installed must be enclosed, explosion-proof and fireproof, and free of aggressive gases and vapors in concentrations that destroy insulation and protective coatings.

Technical characteristics:

Nominal voltage (corresponding to the highest operating voltage), kV

7.2, 12

Nominal current, A

630, 1000

Nominal short-time withstand current, peak value (short-time withstand current), kA

20

Highest peak of nominal short-time withstand current, peak value (peak withstand current), kA

50

Standard version

Depending on the location of the earthing blades:

Version I

earthing blades on the side of the separable contacts
Version II

earthing blades on the side of the hinge contacts
Version III

earthing blades on both sides

Depending on the location of TGN:

Version I

without TGN (Indoor disconnector with earthing switch, Indoor disconnector)
Version II

TGN on the side of the hinge contacts (Through-wall indoor disconnector with earthing switch, Through-wall indoor disconnector)
Version III

TGN on the side of the separable contacts (Through-wall indoor disconnector with earthing switch, Through-wall indoor disconnector)

Version I

without high-speed making mechanism
Version II

with high-speed making mechanism

with red handle

for operating the earthing blades of disconnectors and the earthing switch
with red handle

for operating the main blades of disconnectors

Advantages over other manufacturers:

Self-cleaning contacts, silver-plated
Silver-plated
High short-circuit withstand capability
Simple modular design
High reliability
No spare parts required
Ease of maintenance
Large number of possible combinations
Compliance with IEC 60947-3 requirements

The following requirements were taken into account when designing the disconnectors:

Interchangeability

Ability to use the disconnectors to replace failed ones on existing equipment, while maintaining all installation and connecting dimensions, as well as kinematics.
Optimal dimensions

All disconnectors for a current of 630 and 1000 A have the same dimensions, requiring no additional phase-to-phase insulation.

Indoor disconnector with earthing switch 12 kV 630 A version II

Indoor disconnector with earthing switch 12 kV 630 A version III

Through-wall indoor disconnector with earthing switch 12 kV 630 A version III