Seccionador nalf abb

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Indoor Air Switch Disconnector, NAL Indoor Air Switch Disconnector, NALF

Catalogue 1YMR602160-en

ABB

Triple-pole switch disconnector type NAL Fuse switch disconnector type NALF

Contents
NAL/NALF 12-17,5-24-36-40,5 1. General ....................................................................................... 3 2. Short-circuit making capacity.................................................... 3 3. Environmental withstand ability ................................................. 3 4. Functional description ............................................................... 3 5. Standard features ...................................................................... 4 6. Mechanisms ............................................................................... 4 7. Earthingswitch ........................................................................... 5 8. Motor operation .......................................................................... 5 9. Ordering codes .......................................................................... 6 10.Options ....................................................................................... 7 11.Example of installedswitches ................................................... 8 12.Technical Specifications ............................................................ 9 13.Ordering information ................................................ 11,12,13,14 14.Operating equipment and options ..................................... 15,16 15.Dimemsional drawing ................... 17, 18, 19, 20, 21, 22, 23, 24

2ABB

Triple-pole switch disconnector type NAL Fuse switch disconnector type NALF
1. GENERAL
The switch disconnector system NAL/NALF is based on a modular principle. The basic unit consists of a frame with insulators and current carrying parts. Two different types of operating mechanisms: snap action mechanism type K or stored spring energy mechanism type A, can be mounted on the frame. Fusebases type F with tripping mechanism can also be fitted. A triple pole earthing switch type EB with a snap action mechanism and making capacity is also available. These different modules can be combined in various ways in order to meet your specific requirements. Accessories such as shunt trip, under-voltage release, auxiliary switches, motor operation and various systems for manual operation caneasily be added. ABB’s switch disconnector type NAL and fuse switch disconnector type NALF have primarily been developed for use within the following areas: - as line and transformer switches within distribution networks - as motor switches - as capacitor switches By combining NAL, which disconnects load currents and small fault currents circuit, with a current limiting fuse (F), which breaks largeshort circuit currents, the result is an ideal combination. This combination (NALF) provides protection towards all types of faults in the network. ABB has been producing switch disconnectors for more than 50 years. The NAL was introduced in 1978 and has been undergoing continuos development to satisfy the users’ demands. More than 500 000 switches have been produced and are sold throughout theworld. The switch disconnectors meet IEC Publication 60129, 60265, 60694, 62271, GOST 1516.3-96, GOST 17717-79, ANSI Standard No. C37.20.4 and CSA Standard No. C22.2, No. 193 concerning switches for general use and for safe co-operation between switch disconnector and fuse. Fig. 1 Fig. 2 NAL in network NAL in cell

Fig. 1

Fig. 2

2. SHORT-CIRCUIT MAKING CAPACITY
With carefully designedcontact geometry and high contact velocities the NAL switches are able to close safely on short circuits of up to 1550 MVA at 36 kV.

3. ENVIRONMENTAL WITHSTAND ABILITY
The switch disconnectors comply with IEC requirements for equipment for indoor use. The mechanisms are corrosion protected by zink plating and a supplementary chromate treatment, and the frames are painted with corroision...
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