Vertical-break disconnectors type VSSBIII
Why use HAPAM B.V. disconnectors?
Why use HAPAM B.V. disconnectors?
- More than 75 years of experience
- Durable and reliable design
- Over 120.000 disconnectors and earthing switches are in service in more than 100 countries throughout the world
- Virtually maintenance free
General
The vertical break disconnector consists of three poles. Each pole consists of a frame, one rotating insulator and two support insulators on which the main blade is mounted.
Frame
The frame is made of a square tube on which the insulators are mounted. The bearing housing for the rotating insulator is also mounted in this frame. The bearing housing is sealed and filled up with grease, to ensure a long lifetime. All steel parts of the disconnector are hot-dip galvanized.
Insulators
The disconnectors can be equipped with insulators in accordance with IEC, ANSI or DIN specifications.
Main blade
The main blade is made of an aluminium tube, which has silver-plated copper contacts at both the hinge end and the jaw end. During closing of the disconnector, the main blade makes a double movement: First, the blade is lowered so that it reaches full horizontal position and then the main blade rotates so that contact pressure is applied to both the hinge end and the jaw end of the disconnector.
- The main contacts are of the "reverse-loop" design, which makes them suitable for very high short circuit currents.
- All contact fingers are made of silver-plated copper and are equipped with stainless steel springs to ensure reliable contact pressure.
- The main terminals are made of flat aluminium and can be drilled as per request.
- Depending on the voltage rating, anti-corona shields will be provided.
Earthing switch
Hapam disconnectors may be equipped with earthing switches, which can be built-on to the right hand side and/or to the left hand side.
The earthing switch consists of an aluminium tube, provided with silver-plated contacts at both ends.
Drive mechanism
The disconnectors and/or earthing switches can be single-pole or three-pole operated by means of a motor-operated drive mechanism or a manual-operated drive mechanism. In case only one drive mechanism is used for three-pole operation, the poles are interconnected by means of adjustable coupling rods.
The drive mechanism also houses the auxiliary contacts for position indication.
Testing
The disconnectors and earthing switches are designed and tested in accordance with latest IEC specifications. Hapam maintains a quality assurance system according to ISO 9001, certified by DEKRA (previously known as KEMA).
Installation
The disconnectors and earthing switches are pre-assembled and adjusted in our works as complete as possible.
The construction is designed so that all disconnectors can be installed and adjusted at site very easily, without the need of any special tools. Hapam provides clear installation instructions and assembly drawings.
Maintenance
The disconnectors and earthing switches supplied by Hapam are designed so as to ensure that they are virtually maintenance free. However, to warrant a long and trouble-free service period, we advise that a visual inspection of the contacts and bearing points be carried out at regular intervals.
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