ABB NAL Series Mounting And Operation Manual Download Page 1

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.

Summary of Contents for NAL Series

Page 1: ...lete 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 ope...

Page 2: ...itch 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 swi...

Page 3: ...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...

Page 4: ...e 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...

Page 5: ...utch 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 s...

Page 6: ...ion 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...

Page 7: ...otate 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 Fi...

Page 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 Mo...

Page 9: ...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 Se...

Page 10: ...ted 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...

Page 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...

Page 12: ...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 p...

Page 13: ...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 A...

Page 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 tight...

Page 15: ...ft 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 earthin...

Page 16: ...rew 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...

Page 17: ...rive 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 N...

Page 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 dri...

Page 19: ...tandard 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 F...

Page 20: ...he 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 stan...

Page 21: ...fe 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 inspe...

Page 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 Is...

Page 23: ...itch 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...

Page 24: ...sembly 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...

Page 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...

Page 26: ...uishing 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 op...

Page 27: ...chanism 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 oper...

Page 28: ...anism 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 p...

Page 29: ...pe 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 c...

Page 30: ...on 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 anticipat...

Page 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...

Page 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...

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