Low Voltage Switchgear
As part of its production program, DELING Tuzla has developed production process of LV switchgear of various types and purposes.
- LV switchgear for type compact transformer substations: KBTS, LMTS, MBTS, STS and other
- LV switchgear for transformer substations in facilities
- Command-measuring LV switchgear
- LV switchgear in the field of energetics and industry
- LV Switchgear in u Shopping centers
- LV Switchgear for public buildings and special purpose buildings
- LV Switchgear for residential buildings
Switchgear for production and distribution of electric power
Power plants (hydro and thermal), Transformer substations, Main and additional plants
Paper, chemical, food, cement, and petrochemical industry
Airports, ports, railways
Shopping centers, hospitals, spatial and infrastructure facilities
CHARACTERISTICS OF LV SWITCHGEAR
LV distribution switchgear are intended for distribution of electric power and management of electromotor plants and processes in industry on low-voltage level. They are produced for power of up to 3200A and short circuit power Icw of up to 60 kA/1s, and type tested for power of 2000A inclusive. For rated current of up to 4000A and Icw above 60 kA distributive cabinets and assembled according to typified configurations (as by ABB Striebel & John license) they have a status of type attested cabinets, with a short circuit current of up to 100kA.
Construction is composed of perforated bended profiles made of pickled steel sheet thick up to 2,5 mm, interconnected by welding or mounting technology of construction profiles and angular casting, as by Striebel & John license. The front door is opened to the angle of 120°, while side and back sides, according to requests, are made as fix covers, covers with a lock or combinations of fix covers and rotating door for access to the equipment from the back. The lock on the front door is twisting with three fix points.
Vertical and horizontal perforated supporters made of steel pickled sheet of ?= (2 – 3) mm are used for deposition of equipment inside the cabinets. Cabinet panels have their own stands, which compose a functionally connected order. A number of panels in an order is dictated by conditions of transport and mounting on a building, as well as by weight and dimensions of installed equipment.
A degree of mechanical protection depending on conditions and place of mounting is IP20 to IP55. A high degree of IP protection is reached by automated (robot) technology for pouring polyurethane gasket on door and cabinet covers. Anticorrosion protection is made by electrostatic plasticization, in RAL 7032/7035 color, as a standard, or in a nuance according to the Client’s request.
Cabinet dimensions are standardized, but may differ depending on conditions on the place of installation. Standard dimensions for cabinets are within the following values:
- Freestanding ISL switchgear ovo je razmak NL Superstructure/Fitted closets
- Width: 400-1200mm Width: 400-1400mm
- Depth: 400-900mm Depth 200-350mm
- Height: 1600-2200mm Height:550-1400mm
LV switchgear production is based on modular system, so that a huge range of various possibilities of panel configuration is offered. Freestanding and on-wall distribution cabinets in IP30 - IP54 protection are completed with PVC isolation panels, whose application completely prevented possible contact of elements under voltage.
Production and assembling of LV switchgear for distribution according to TTA Contract: DELING - ABB Striebel & John Germany.
Distribution switchgear produced and assembled according to typified configurations have a status of type attested cabinets. Control of coordination with type configurations is made by Striebel & John and approves issuance of typified attest for assembled cabinet by verified scheme.
High level of technical quality of LV switchgear is verified by typical examinations of main distributive switchgears for currents of up to 2000A of MDB type, produced at KONČAR Institute, accredited by: EA European co-operation for Accreditation.
Technical characteristics of LV cabinets according to standards:
IEC 60439-1 (EN 60439-1)/ IEC 61439-1, IEC 61439-2
Rated plant voltage (Ue) ................ up to 690V
Rated isolation voltage (Ui) ................. up to 1000V
Rated frequency ............................... 50-60Hz
Rated supportive impulse voltage ................ 8kV
Rated current ................................ up to In=4000A
Rated maximum supportive current (Ipk) 0,1 sec .... up to 220 kA
Rated supportive short circuit current (Icw) 1,0 sec ... up to 100 kA