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Foreword
1. Introduction ....................................................................................4
2. Main product features ...................................................................4
3. Functional description . .................................................................5
Switches and main parts
4. Basic designs ................................................................................6
5. Operating mechanisms ................................................................6
6. Earthing switch ..............................................................................6
7. F
use bases and recommended current limiting fuses ...............7
8. Ordering codes . ............................................................................8
9. Technical Specifications ...............................................................9
Accessories
10. Additional equipment for NAL/NALF switch disconnectors...11
11. Example of switch arrangement ..............................................13
12. Ordering information .................................................................14
13. Operating mechanisms and optional accessories .................21
14. Motor drives ..............................................................................22
15. Dimensional drawings ..............................................................24
NAL-type switch disconnectors are based on a modular nisms, snap action mechanism type K or stored spring energy
principle, which gives it a wide range of functionality. With mechanism type A, can be mounted on the frame. Fuse bases
a unique design that extinguishes electric arcs and enables type F, with or without fuse tripping mechanism, and an earthing
high switching capacity, they represent an attractive solu- switch type E/EB, suitable for both direct mounting and free
tion as a key breaking element for applications in enclosed standing components, complete the basic equipment of a switch
switchgear and transformer compact substations. In combi- disconnector. These modules can be easily configured according
nation with type CEF current limiting fuses, NALF fuse switch to customer expectations.
disconnectors ensure control over the full range of overload Accessories, such as shunt trip, under-voltage release, auxiliary
and short-circuit currents. switches, motor operation and various systems for manual opera-
tion can easily be added.
The main areas of application of NAL/NALF switch disconnectors
are as: 2. Main product features
– Line switch disconnectors in medium-voltage networks, A NAL disconnector (which interrupts load currents up to 1,250 A)
– Switch disconnectors with fuses for the switching and protec- and a small fault-current circuit combined with a fuse base (F) and
tion of: current limiting fuses (which break large short-circuit currents) cre-
– Distribution transformers ate a NALF-type disconnector that provides protection against a
– Motors majority of fault types in a modern electric network. Both NAL/
– Capacitor banks NALF are designed in accordance with the requirements of the fol-
lowing standards: 60129, 60265, 60694, GOST 1516.3‑96, GOST
NAL/NALF switch disconnectors are manufactured according 17717‑79, and CSA Standard No. C22.2, No. 193, and IEC
to global quality and environmental standards and confirmed 62271‑105, all of which consider switches for general use and
by ISO 9001 and ISO 14001 certificates. In addition, they are ensure there is safe switching coordination between a switch dis-
98.64 percent recyclable. connector and a current limiting fuse.
The NAL/NALF brand is well known around the world, and more Within the scope of the ANSI standard, NAL is known as Ver-
than 600,000 switches have been produced so far. It has been saRupter and it meets the requirements of ANSI No. C37.20.4. The
undergoing continuous development to satisfy users’ demands. selected styles of NAL/NALF switch disconnector are listed as cer-
tified by the Canadian Standards Association (CSA). Some
1. Introduction VersaRupter styles are UL listed prior to their release to comply with
The switch disconnector system NAL/NALF is based on a modu- the relevant saftey requirements required in regions of the United
lar principle. The basic unit consists of a frame with insulators and States.
current carrying parts. Two different types of operating mecha-
Fig. 1 Switchboard with NAL Fig. 2 Structure of panel with NAL Fig. 3 NALF 36/40.5 KV fuse
switch disconnector switch disconnector switch disconnector
Fig.6 Closing
4. Basic designs
NAL
The standard feature consists of chassis, insulators and current
carrying parts with the following pole distance:
– 12 kV – pole distance 150 mm, 170 mm and 210 mm
– 17.5 kV – pole distance 170 mm and 210 mm
– 24 kV – pole distance 170 mm*, 235 mm and 275 mm
– 36/40.5 kV – pole distance 360 mm
* – with insulating barriers
Rated currents are:
– 400, 630 and 1250 A up to 24 kV
– 630/800/1000 A for 36/40.5 kV
NALF
Is delivered with the same pole distances as the standard feature.
Fuse base type F is delivered for installation on both the opening
Fig. 8 NALF and pivot sides, with or without automatic tripping.
A fuse base with six insulators can also be delivered separately
with some form of signal indication when a fuse blows or for
installation on the pivot side of the switch.
5. Mechanisms
Type A with two springs
The opening spring is always charged before the switch can be
closed by means of a closing spring. This means the opening
spring is always charged in a closed switch, which in turn can be
tripped immediately by hand, electrically or by a fuse-link striker
system.
Type K with one spring
Fig 9. Mechanism A Closing or opening the switch is performed by charging the spring
past the dead centre.
6. Earthing switch
Quick earthing switch type E
This type of earthing switch is equipped with a quick spring mech-
anism. It can be mounted on the pivot side of the switch
disconnector or on the fuse base when the latter is on the pivot
side of the switch.
Quick earthing switch type EB
Designed to be an independent assembly for both sides of the
Fig. 10 Mechanism K disconnector.
Earthing switch type LCES
This type of switch is not equipped with a quick spring mecha-
nism. It can be mounted on on the pivot side of the switch
disconnector or on the fuse base when the latter is on the pivot
side of the switch.
Type name VR8.25 VR15 VR15 (61 kA) VR17 VR27 VR38
Rated voltage kV 4.73 12-13.8 13.8 12-16.5 23.9-24.9 34.5
Rated maximum voltage kV 8.25 15 15 17 27 38
Rated current A 200/600/1200 200/600/1200 600/1200 200/600/1200 200/600/1200 600/800
Impulse test voltage kV 75 95 95 110 125 150
Power frequency withstand voltage kV 26 36 36 50 60 80
Pole spacing mm/inch 210/8.25 170/6.69 235/9.25 235/9.25 275/10.8 360/14.1
Momentary rating asymmetrical kA eff. 40 40 61 40 40 40
Fault-closing rated current
asymmetrical kA eff. 40 40 61 40 40 30
Short time current symmetrical kA eff./sec. 25/3 25/3 40/3 25/2 25/3 25/2
Fig. 13
Auxiliary switch for blown fuse
Fig. 14
Shaft extension with joint link, 380/470 mm consists of:
a) Support bearing a)
b) Connecting tube
c) Extension bar
d) Conneting kit
b)
c)
d)
Fig. 15
Shaft extension for left-hand operation of switch.
Fig. 16
Insulated operating levers for switch operation.
Fig. 17
Test fuse link – adjustable.
d) lower part for HE can be equipped with blocking coil for all standard (c)
voltages
(d)
Fig. 19
Shunt trip coil can be mounted on all A-mechanisms. This coil is available
for the following voltages: 24, 48, 110, 220 V DC and 110, 220 V AC. It
shall always be connected in series with an auxiliary switch, which discon-
nects the shunt trip coil when the switch is open.
Fig. 20
Mechanical interlocking between switch disconnector and earthing switch.
At the earthing switch on the fuse base, the interlocking type (length) de-
pends on the length of the fuse. Therefore, the fuse size must be stated.
Fig. 21
Auxiliary switch can be mounted on all switch disconnectors, max.
8NO and 8NC and on all earthing switches except LCES, max. 4NO + 4NC
+ connection kit for assembling.
Motor drive
NM
For automatic charge
and operating switch
disconnector
Shunt trip
Release charged
spring mechanism,
opens the switch
disconnector
Mechanical
interlocking
Interlocks switch
disconnector when
cooperating with
earthing
Earthing switch
shaft
For operating
earthing switch or
for mechanical inter-
locking
Quick earthing
switch type E
Earth main circuit of
switch disconnector
Switch disconnector with operating mechanism (A) Switch disconnector with fuse base on pivot side, operating
Fuse base type F for spring mechanism type A with fuse tripping, Fuse base type F for spring mechanism type K/A
mounted on opening side without fuse tripping, mounted on opening side
Rated Rated Pole Fuse base with six insulators for spring mechanism type A
Ordering Weight
Type voltage current spacing without fuse tripping
number [kg]
[kV] [A] [mm]
Rated Rated Pole
F6 12 12 400/630/1250 150 1YMX054205M0001 16 Ordering Weight
Type voltage current spacing
F6 12 12 400/630/1250 170 1YMX064205M0001 16.5 number [kg]
[kV] [A] [mm]
F6 12 12 400/630/1250 210 1YMX054974M0001 17
F6 12 12 400/630/1250 150 1YMX054185M0001 15.5
F6 17 17.5 400/630/1250 170 1YMX054206M0001 20
F6 12 12 400/630/1250 170 1YMX064185M0001 16
F6 17 17.5 400/630/1250 210 1YMX064206M0001 20
F6 12 12 400/630/1250 210 1YMX054972M0001 16.5
F6 24 24 400/630/1250 170 1YMX064207M0001 22
F6 17 17.5 400/630/1250 170 1YMX054418M0001 19.5
F6 24 24 400/630/1250 235 1YMX054207M0001 22
F6 17 17.5 400/630/1250 210 1YMX064418M0001 19.5
F6 24 24 400/630/1250 275 1YMX054474M0001 24
F6 24 24 400/630/1250 170 1YMX064187M0001 21.5
F6 24 24 400/630/1250 235 1YMX054187M0001 21.5
F6 24 24 400/630/1250 275 1YMX054472M0001 23.5
Fuse base with six insulators and double fuses per phase
14. Motor drives and bevel gears. The UEMC40A series is not recommended for
Motor drives enable the remote opening and closing of switch dis- NAL 36 – 40 kV with A mechanism.
connectors while at the same time they are prepared for the Drive type NM (Fig. 29) can be mounted directly on the shaft or
possibility of an emergency manual maneuver. A variety of models switch disconnector or on the side wall of the panel. It cooperates
offers a selection of appropriate drive configurations. with spring mechanisms A and K.
Drives type UEMC40A1 and A2 are designed to be installed on To mount the NM drive on the shaft of the dosconnector, suitable
the front wall of the panel (left or right side). They can open and supports brackets are needed (Fig. 28). The correct choice of
close switch disconnector mechanisms A and K, and are con- brackets depends on the type of disconnector, drive and motor
nected to the shaft of the switch disconnector by coupling ties assembly as is shown in the table below.
The motor unit is mechanically disconnected after each operation, also equipped with an automatic fuse. It can be placed in a panel
which presents an opportunity to manually operate the switch dis- with the switch disconnector or in a separate box. Connection with
connector. The drive can be operated locally via the buttons on the the drive is via a plug-ended cable. Instead of the NM motor drive,
control box (Fig. 31) or remotely using radio control. the UEMC40K3 type can be used (Fig. 30). The control system is
The control unit (Fig. 32) delivered with the motor drive contains the then supplied in a separate order.
necessary elements such as contactors, connections, etc. and is
Fig. 29 NM motor driver Fig. 30 K3 motor driver Fig. 31 Operating box Fig. 32 Control unit
1YMX343070
Auxiliary
switch
Shunt
trip
Type A A1 A2 A3 B H H1 H2 K K1 M N N1 P R S U V
NAL 12-A/K P=150 166 320 362 394 90 422 428 510 310 63 412 122 164 150 375 350 75 33
NAL 12-A/K P=170 166 320 362 394 90 422 428 510 310 63 452 122 164 170 375 390 75 33
NAL 12-A/K P=210 166 320 362 394 90 422 428 510 310 63 532 122 164 210 375 470 75 33
NAL 17.5-A/K P=170 225 375 418 511 98 534 577 600 441 87 452 122 164 170 500 395 90 18
NAL 17.5-A/K P=210 225 375 418 511 98 534 577 600 441 87 532 122 164 210 500 475 90 18
NAL 24-A/K P=235 225 375 418 511 98 534 577 600 441 87 582 186 202 235 500 525 90 18
NAL 24-A/K P=275 225 375 418 511 98 534 577 600 441 87 662 186 202 275 500 605 90 18
*1250 A: dimension A +2 mm
Auxiliary
1YMX888372
switch
Shunt
trip
1YMX343381
Auxiliary
switch
Fuses
Shunt trip H1 H4 K2 K4 R1 R2
kV length
192 848 710 722 598 275 50
3.6/7.2
292
948 810 822 698 375 150
292
12
442 1098 960 972 848 525 300
Type M S
NALF 12 P=150 412 350
NALF 12 P=170 452 390
NALF 12 P=210 532 470
1YMX343375
Auxiliary
switch
Fuses
H1 H4 K2 K4 R1 R2
kV length
292 1060 895 925 828 375 125
17.5
442 1210 1045 1075 978 525 275
Type M S
Shunt trip NALF 17 P=170 452 395
NALF 17 P=210 532 470
Auxiliary
1YMX888373
switch
Shunt
trip
Type A B C D E
NALF24-4/6A/K170LE 202 840 654 174 –
NALF24-4/6A/K170LEL 164 802 616 139 –
Dimensions
Fuse style 24kV
H1 K2 L R1
ln [A]
6-63 1440 1075 442 525
CEF
80-125 1445 1170 557 620
1YMX343379
Auxiliary
switch
Shunt
trip
Fuses Type M S
H1 H4 K2 K4 R1 R2
kV length NALF 24 P=170 452 395
442 1084 1045 986 978 425 275 NALF 24 P=235 582 525
24
537 1284 1140 1090 1073 525 370 NALF 24 P=275 662 605
1YMX343567
Fuses
H5
kV length
192 462
3.6/7.2
292 562
292 562
12
442 704
292 563
17.5
442 706
442 706
24
537 801
Type A5 A7 P
NALF 12, P=150 173 430 150
NALF 12, P=170 173 430 170
NALF 12, P=210 173 430 210
NALF 17.5, P=170 243 500 170
NALF 17.5, P=210 243 500 210
NALF 24, P=170 243 500 170
NALF 24, P=235 243 500 235
NALF 24, P=275 243 500 275
1YMX343600
Type M1 M2 S
E12 P=150 681 428 350
E12 P=170 721 468 390
E12 P=210 801 548 470
1YMX343601
E 17.5 M1 M2 S Earthing switch Earthing switch
P=170 721 468 395 with making type E17.5 with making type E17.5
P=210 801 548 475 mounted on NAL 17.5 mounted on fuse base F 17.5
Earthing switch with making capacity type E24/EL24 P=170 with insulation barriers
1YMX888374
Type M N2 N3 Earthing switch with making Earthing switch with making
E24 P=170 808 166 174 type E24/EL24 mounted type E24/EL24 mounted
EL24 P=170 721 114 139 on NAL24 P=170 on fuse base F24 P=170
1YMX343538
Type H2 H3 K3 M1 M2 N2 N3 P S I W
E12 P=150 208 393 100 681 428 112 139 150 350 375 60
E12 P=170 208 393 100 721 468 112 139 170 390 375 60
E12 P=210 208 393 100 801 548 112 139 210 470 375 60
E17.5 P=170 208 432 100 721 468 112 139 170 395 375 60
E17.5 P=210 208 432 100 801 548 112 139 210 395 375 60
E24 P=235 351 575 100 933 598 161 174 235 525 500 120
E24 P=275 351 575 100 1013 678 161 174 275 605 500 120
1YMX343611
Type A H K R U
EB12 245 231 115 200 46
EB17.5 – 24 310 245 90 175 21 Other measurements see figure 1YMX343538 above
1YMX888347
Type M1 M2 S Earthing switch Earthing switch
E 12 P=150 681 428 350 types LCES E12 types LCES EF12
E 12 P=170 721 468 390 mounted on NAL 12 mounted on fuse base F12
E 12 P=210 801 548 470
1YMX888348
Type M1 M2 S Earthing switch Earthing switch
E 17 P=170 721 468 395 types LCES E17 types LCES EF17
E 17 P=210 801 548 475 mounted on NAL 12 mounted on fuse base F17
1YMX888350
Standard hand operating mechanizm HE
1YMX040223
Operating angle 180°
Fixing holes for front
bearing
1YMX304063
Auxiliary
switch
Shunt trip
Fuses
H1 H2 H3 K2 R1
kV A e
4-100 192 848 772 1063 722 275
7.2
125-200 292 948 872 1163 822 375
4-100 292 948 872 1163 822 375
12
125-200 442 1098 1022 1313 972 525
1YMX241285
1YMX241288
NAL 36 + EB 36
1YMX888395
675
104 360 360 104 530
870 123
14
24
M12
665
700
650
745
M10
14
40
100
256 256
6xM10
418
243
243
450
106
40
4xØ
14
150
80
248 112 360 360 112 248 485
1440
1YMX888351
Switch disconnector type VersaRupter 61 kA
1YMX888272
1YMX888352
Switch disconnector type VersaRupter with mechanizm
1YMX888353
Auxiliary
switch
Shunt
trip
Type A A1 A2 A3 B H H1 H2 K K1 M N N1 P mm/inch R S U V
4.73 kV 200/600/1200 A 166 320 362 394 90 422 428 510 310 63 532 122 164 210/8.25 375 470 75 33
12-13.8 kV 200/600/1200 A 225 375 418 511 98 534 577 600 441 87 452 122 164 170/6.69 500 395 75 33
12-16.8 kV 200/600/1200 A 225 375 418 511 98 534 577 600 441 87 582 186 202 235/9.25 500 525 90 18
22.9-24.9 kV 600/800 A 225 375 418 511 98 534 577 600 441 87 622 186 202 275/10.8 500 605 90 18
34.5 kV 200/600/1200 A 370 530 675 850 123 700 – 870 665 – 928 265 265 360/14.1 650 870 – –
*1250 A: dimension A+2 mm
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