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Indoor Air Switch-disconnector, NAL/NALF
Rated voltage: 12, 17.5, 24 and 36 kV
Rated current: 400/630, 800 and 1250 A

Mounting and operation manual

The NAL family of switch-disconnectors is characterized
by its compact, modular design and broad functionality. With
their unique design for extinguishing the electric arc and high
switching capacity, they represent an attractive solution, as main
switching apparatus for applications in enclosed switchgear and
compact transformer stations. In combination with CEF current
limiting fuses, they provide reliable control over the full range of
overload currents.

Main areas of application NAL switch disconnectors:
– as line and transformer switches within distribution networks,
– as motor switches,
– as capacitor switches.

Introduction

The NAL/NALF switch-disconnector system is based on a modular
principle. The basic unit consists of a frame with insulators
and current carrying elements. Two different types of operating
mechanisms: snap action mechanism type K or stored spring energy
mechanism type A, can be mounted on the frame. Fuse bases type F
with or without fuse tripping mechanism, and earthing switch type E/
EB, suitable for both direct monting and free standing components,
complete the basic switch-disconnector equipment. These modules
can be easily configured, according to customer requirements.
Accessories such as shunt trip, under-voltage release, auxiliary
switches, motor operation and various systems for manual operation
can easily be added.

The NAL/NALF brand is recognised globally and more than 600,000
switches have been produced so far. The design is subject to
continuous development to meet changing customer needs.

Main Product Features

NALF is the ideal solution for the protection of the majority of faults in
modern electrical networks. It combines NAL, which interrupts load
currents (up to 1250A) and small fault currents, with the fuse base (F)
for breaking large short-circuit currents.
This switch-disconnector range meets IEC Publication 60129, 60265,
60694, GOST 1516.3-96, GOST 17717-79, and CSA Standard No.
C22.2, No. 193, and IEC 62271-105, regarding switches for general
use and for safe switching coordination between switch-disconnectors
and a current limiting fuse.
The NAL version for ANSI standard is called VersaRupter. It meets
ANSI Standard No. C37.20.4.
The specified NAL/NALF switch-disconnectors are listed as certified by
the Canadian Standard Association. Some VersaRupter styles are UL
listed, in terms of compliance with relevant safety requirements, in order
of their release for use in each region of the US and installations carried
out in accordance with the UL standard.

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Содержание NAL 12

Страница 1: ...plete the basic switch disconnector equipment These modules can be easily configured according to customer requirements Accessories such as shunt trip under voltage release auxiliary switches motor operation and various systems for manual operation can easily be added The NAL NALF brand is recognised globally and more than 600 000 switches have been produced so far The design is subject to continu...

Страница 2: ...witch to the switch disconnector type NAL 12 7 2 Mounting the eartch switch to the fuse switch disconnector type NALF 12 8 0 Mounting the mechanical interlock between switch disconnector and eartch switch 12 9 0 Mounting the shunt release 13 10 0 Mounting the auxiliary switch 13 11 0 Mounting the auxiliary switch for E EB earthing switch excluding LCES 14 12 0 Mounting of NM motor drive 17 13 0 Se...

Страница 3: ...f a supporting structure shall consider the geometrical configuration of the disconnector vertical or horizontal and minimal clearances to both earthed and live parts The sup porting structure shall be rigid enough to avoid some deformation of the disconnector base All the touching points of the supporting structure and the disconnector base shall lay in the same plane For construction of the supp...

Страница 4: ...he arrester rings on the front shaft of the hand operating mechanism see Fig 8 Turn the operating handle anti clockwi se until the opening spring is charged and latched Mount the arrester ring Turn the operating handle clockwise until the switch closes Test the arrester ring for correct functioning Opening After having pulled out the arrester ring turn the operating handle anti clockwise The switc...

Страница 5: ...lutch of the hollow main shaft and the mechanism is fixed to the switch frame Note Contact knives in open position Normally the switch disconnector is delivered without shaft exten sion for left hand side operation 4 1 Test operation of A mechanism After having mounted the mechanism to the switch frame check that the latch H is in correct position by pulling it back to the outermost position see F...

Страница 6: ...on in open position see Fig 10 2 Opening spring is not charged apply to NAL NALF with A mechanism see Fig 11 3 Install the bevel gear on the NAL NALF shaft and earthing switch Be sure the wheels are in the correct position the lar ger should be located to the right side on switch disconnector on earthing switch to the left see Fig 12 4 Install the hand operation type HE Between cardanic joint and ...

Страница 7: ...rotate loosely after taking out the arrestor ring see Fig 16 8 Put the operating handle on the splined end Turn the handle anticlockwise to charge A mechanism opening spring apply to A mechanism see Fig 17 NAL NALF Mounting and operation manual 7 Fig 12 Fig 14 Fig 16 Fig 13 Fig 15 Fig 17 Fig 12 17 Mounting of hand operating mechanism HE ...

Страница 8: ... Fig 19 11 Put the arrestor ring on the shaft see Fig 20 12 Slide out the arrester ring to the position where it is possible to turn the handle clockwise and close disconnector see Fig 21 8 NAL NALF Mounting and operation manual Fig 18 Fig 20 Fig 19 Fig 21 Fig 18 21 Mounting of hand operating mechanism HE ...

Страница 9: ...t see Fig 23 15 Correctly position the arrestor ring in closed position see Fig 24 16 Check the opening spring is charged Upper picture shows the charged position of that spring After adjustment the See ger ring spring and nut should be put back on the HE shaft see Fig 25 NAL NALF Mounting and operation manual 9 Fig 24 Fig 22 Fig 25 Fig 23 Fig 22 25 Mounting of hand operating mechanism HE ...

Страница 10: ...nted on the release shaft 1 on the LHS and secured by split pin 7 6 Disc 3 is mounted to the release shaft 4 of the mechanism 7 The release rods 11 are mounted onto the hooks 12 on the release shaft 1 6 3 Adjustment of the fuse tripping Fig 30 the adjustment applies to switch disconnectors with fuse links and fuse tripping the adjustment must be made with both operating springs in the mechanism in...

Страница 11: ... in accordance with DIN 43625 in one of the phases Dimensionally the fuse link then will have the same dimensions as ABB CEF fuse links 3 If the distance between the fuse clips is longer than described max e 8 mm the ajustment point 6 3 must be made with the fuse link resting on the fuse clips on the fuse base 4 The distance between the striker pin and the fuse trip flag 15 must be from 3 6 mm By ...

Страница 12: ...n the contacts screws 7 2 Mounting the earth switch to the fuse switch disconnector type NALF Proceed as under item 7 1 The contacts A must be mounted on the terminals of the fuse base and secured in position with tension bushes 8 0 Mounting the mechanical interlock between switch di sconnector and earth switch Fig 32 34 The switch disconnector must be in the open position for NAL A the opening sp...

Страница 13: ...g F see Fig 31 must not be Fig 35 Auxiliary switch mounted on NAL 17 24 Fig 36 Wiring diagram auxiliary switch Fig 37 Wiring diagram tripping coil Fig 38 Shunt trip parts component A mechanism Fig 39 Auxiliary switch mounted on NAL 12 Fig 35 Fig 38 Fig 39 Fig 36 Fig 37 latched Return the shaft to its neutral position Connect the bar B to the perforated disc A see Fig 31 10 0 Mounting the auxiliary...

Страница 14: ... starts with the earthing switch in open position see Fig 40 2 The arm of auxiliary switch should be at an angle 45 50 degre es in direction of earthing switch see Fig 41 3 Holdfast screw must be tightened from the flat side of auxiliary switch shaft see Fig 42 Fig 40 Fig 42 Fig 41 Fig 40 42 Mounting the auxiliary switch for E EB earthing switch ...

Страница 15: ...aft of earthing switch so that the rod connecting the arm of auxiliary switch with shackle is slightly strained see Fig 43 5 7 Tighten the screws M5 that mount the shackle on extension shaft of earthing switch see Fig 44 46 Fig 43 Fig 45 Fig 44 Fig 46 Fig 43 46 Mounting the auxiliary switch for E EB earthing switch ...

Страница 16: ...crew rather firmly see Fig 47 48 Verify the correct operation of auxiliary switch 10 Earthing switch in open position see Fig 49 11 Earthing switch in closed position see Fig 50 Fig 47 50 Mounting the auxiliary switch for E EB earthing switch Fig 47 Fig 49 Fig 48 Fig 50 ...

Страница 17: ...drive settings for A mechanism 2 NAL F must be in open position and discharge both springs Locate the spacer bracket mounting holes on the A mecha nism see Fig 53 54 Fully tighten mounting screws NAL NALF Mounting and operation manual 17 Fig 51 Fig 53 Fig 52 Fig 54 Fig 51 54 Mounting of NM motor drive on A mechanism ...

Страница 18: ... operating shaft anticlockwise see Fig 55 56 4 Before mounting on the A mechanism shaft set up distance to 4 8 mm see Fig 57 18 NAL NALF Mounting and operation manual Fig 55 57 Mounting of NM motor drive on A mechanism Fig 55 Fig 56 Fig 57 ...

Страница 19: ...standard motor drive for NAL F on the shaft and fully tight mounting screws see Fig 58 59 NAL NALF Mounting and operation manual 19 Fig 58 59 Mounting of standard motor drive for NAL F on A mechanism Fig 58 Fig 59 ...

Страница 20: ...the K mechanism shaft set up distance to 4 8 mm see Fig 62 20 NAL NALF Mounting and operation manual 8 Before mounting the motor device adjust distance 3 5 mm in K mechanism see Fig 63 9 Mount the standard motor drive for NAL F on the shaft and fully tight mounting screws see Fig 64 65 Fig 60 65 Mounting of standard motor drive for NAL F on K mechanism Fig 60 Fig 62 Fig 64 Fig 61 Fig 63 Fig 65 ...

Страница 21: ...afe distances to earthed parts or to other lived parts must be kept f in special cases e g fault in the circuit where the NAL is installed or the apparatus has been overloaded apparatus should be inspected g visible label stating NAL New Design 2008 For all other NAL switch disconnector should be checked at least once a year moving and fixed contacts are greased with Isoflex Topas NCA 52 mechanism...

Страница 22: ... with K mechanism On delivery the draw bars are connected 3 Before operating the switch check that the surfaces of the main contacts are covered by contact grease in the contact area The grease type Isoflex Topas NCA 52 must be used if additional grease is required 4 Close the switch by operating the mechanism Check the engagement and the contact overlap All four contact points on the main contact...

Страница 23: ...witch disconnector in open position with both the operating springs uncharged 1 Remove the circlips 2 1 attaching the draw bar to the main shaft eccentric bolt not to be loosened 2 Unscrew the screw s 2 2 attaching the main contact to the insulator Remove the fixed contact with the contact knife and draw bar 1 pc screw on 12 kV and 2 pcs screws on 24 kV 3 Attach the new main contact with the conta...

Страница 24: ...ssembly by the screws 3 1 For correct torque see page 29 Check correct position of the arcing contact and test correct function Grease the contact area with ISOFLEX TOPAS NCA 52 15 0 Replacement of the arcing chamber Fig 70 Follow instructions under item 14 2 16 0 Replacement of insulators 16 1 Hollow insulators with arcing chamber Fig 70 1 Unscrew 3 9 and detach the insulator 2 The new insulator ...

Страница 25: ... For correct torque see page 29 Note the washer and spring washer for the screws 4 Attach the fuse clips and contact block respectively to the top of the insulator by the screws 4 2 For correct torque see page 29 b Fig 71 Support insulators Fig 72 Detached draw bar Fig 71 Fig 72 18 0 Changing parts in NAL 36 kV 18 1 Changing contact knives Disconnect the switch disconnector When A mechanism is fit...

Страница 26: ...guishing chambers and that the main knives make proper contact 6 Put contact grease on the main contacts before the first test operation The contact position is adjusted by the eccentric bolt on the operating shaft It can also be adjusted by adju sting the support insulator 18 2 Changing draw bar Fig 74 1 Disconnect the switch disconnector 2 Pull out the bolt b 3 Pull down the auxiliary knife such...

Страница 27: ...echanism is dismounted from the frame 3 All draw bars are detached from the crank arm of the opera ting shaft see Fig 72 4 Turn the operating shaft to one side 5 Disconnect the piston rod from the operating shaft and piston can be taken out 6 Undo the fixing screws on insulator 7 The hollow insulator is attached to the frame by 4 screws M10 spannergap 17 New Insulator is fitted If contact blocks a...

Страница 28: ...hanism before starting If a mechanism is installed 1 Close the switch disconnector 2 Disconnect the lower part of draw bar from the main shaft 3 Disconnect the piston rod from the operating shaft and piston can be taken out 4 New piston is fitted the same way NB Piston and cylinder MUST NOT be greased or lubricated 5 Connect the drawbar to the eccentric bolt on the main shaft ...

Страница 29: ...ype A Closing Nm Opening Nm 90 110 120 5 5 5 04 Minimum distance between fixed contact and contact knife of open switch 120 mm 212 mm 360 mm Verified by manufacturer 05 Contact knife penetration Both contact spots on each side Control 100 by sight 06 Contact knife penetration MUST make contact 07 Contact knife alignment Contact area 26 mm Tolerance of contact engagement 2 5 mm see fig 16 Control 1...

Страница 30: ...ion costs of capital costs of substitute equipment facilities or services downtime costs delays and claims of custo mers of purchaser or costs connected with interruption of operation loss of anticipated savings or for any special indirect or consequential damage or loss of any nature whatsoever This limitation of liability provisions mentioned above shall prevail over any conflicting or inconsist...

Страница 31: ... 40 292 442 65 CEF 12 50 292 442 65 CEF 12 63 292 442 65 CEF 12 80 292 442 65 87 CEF 12 100 292 442 65 87 CEF 12 125 442 65 87 NALF 17 5 CEF 17 5 6 292 442 65 CEF 17 5 10 292 442 65 CEF 17 5 16 292 442 65 CEF 17 5 20 292 442 65 CEF 17 5 25 292 442 65 CEF 17 5 31 5 292 442 65 CEF 17 5 40 292 442 65 87 CEF 17 5 50 292 442 65 87 CEF 17 5 63 292 442 65 87 CEF 17 5 80 442 87 CEF 17 5 100 442 87 CEF 17 ...

Страница 32: ... kg NAL17 6A170 34 kg NAL24 6A235 42 kg NAL36 6A360 72 kg Raw Material of total weight weight Recycle Environmental effects recycle reuse processes Steel Cooper Zinc Silver 60 59 11 26 0 025 0 012 Yes Yes Yes Yes Separate utilize in favor of new source Separate utilize in favor of new source Electrolysis utilize in favor of new source Electrolysis utilize in favor of new source Thermoplastic Polye...

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