X

UWS-EL, UWA-EL - 3-pole indoor earthing switches

UWS-EL 12/31,5
UWS-EL 24/40

Application:

Earthing switches UW-EL can be used indoor with voltages from 12 to 24 kV and short- circuit currents from 16 to 31.5 kA/1 s. Earthing switches type UWA-EL and UWS-EL have the ability to conduct short-circuit currents, thus protecting both the operator and the switching equipment. 

Each earthing switch is equipped with a spring mechanism, which makes the closing of the circuit independent of the speed of manual manoeuvring. You can freely choose the operating side of the earthing switch and the direction of current flow, except for a few variants combined with current transformers.

Earthing switches type UWA-EL are apparatus earthing switches. Permanent contacts are attached to another device, e.g. a disconnector or a current transformer. Earthing switches type UWS-EL are stationary devices, equipped with insulators, on which permanent contacts are mounted. In this case, the connection can be either rail or circular.

In the earthing switches UWS-EL it is possible to install insulators with the signaling module SC or SR.

The base of the earthing switches is made of galvanized steel sheet, the conductive elements are made of silver plated copper elements, the insulators are made of epoxy resins.

 

Technical data:

TYPE

DIVIDER

RATED VOLTAGE

SHORT CIRCUIT CURRENT

SHORT-CIRCUIT IMPULSE CURRENT

TORQUE - OPEN POSITION 

TORQUE - CLOSE POSITION

WEIGHT

UWS – EL – 12

UWA – EL – 12

150, 170, 210

12 kV

25, 31,5 kA/ 1 s.

40-80 kA

90 Nm

50 Nm

14/17 kg

UWS – EL – 17,5

UWA – EL – 17,5

180, 210, 275, 300

17,5 kV

25, 31,5 kA/ 1 s.

40-80 kA

120 Nm

50 Nm

15/18 kg

UWS – EL – 24

UWA – EL – 24

210, 275, 300

24 kV

25, 31,5 kA/ 1 s.

40-80 kA

140 Nm

50 Nm

17/20 kg

  • rated frequency: 50, 60 Hz
  • ambient temperature: -40˚C up to +60˚C

Insulation levels:

RATED VOLTAGE

TEST WITHSTAND VOLTAGE 1 min, 50 Hz

TEST IMPULSE VOLTAGE 1,2/50 µs

12

28 (42 GOST)

75

17,5

38

95

24

50

125

Auxiliary contacts:

Auxiliary contacts can be installed on both the left and right side of the earthing switch. The connector may have five or ten pairs of auxiliary contacts NO / NC. The WK 5/10 limit switches are used in one of configurations presented on the connection diagram.

Connection diagram

Compatibility to standards:

  • PN-EN 62271-102:2005/AC:2005
  • PN-EN 62271-1:2009

Versions:

The earthing switches have different configurations. Depending on customer requirements, marking can be as follows:

TYPE

RATED VOLTAGE Un [kV]

SHORT-CIRCUIT CURRENT 1 s. Ik [kA]

 

DIVIDER [mm]

UWS

UWA

12

17,5

24

25

31,5

Z

150

170

180

210

275

300

EXAMPLE:

UWS 24/31,5/Z/210:

Stationary earthing switch, voltage 24 kV, short-circuit current 1 s. 31,5 kA with divider of 210 mm.

TECHNICAL DRAWINGS (UWS):

Dimensions of earthing switch UWS-EL
UWS Z A1 A2 A3 B1 B2 B3 C1 (25) C1 (63)
24/25 | 24/63 170 366 529 538 316 360 434 370 350
  210 446 609 618 316 360 434 270 350
  275 576 739 748 316 360 434 360 307
  300 626 789 798 316 360 434 360 307
17/25/Z | 17/63 210 446 609 618 316 360 412 345 345
  275 576 739 748 316 360 412 335 310
  300 626 789 798 316 360 412 335 310
12/25 | 12/63 150 326 489 498 316 360 402 224 260
  170 366 529 538 316 360 402 224 260
  210 446 609 618 316 360 402 224 260

TECHNICAL DRAWINGS (UWA):

Dimensions of earthing switch UWA-EL
UWA Z A1 A2 A3 B1 C1
12/25 | 12/63 150 350 418 588 232 257
  170 390 458 628 232 257
  210 470 538 708 232 257
17/25 | 17/63 180 380 450 605 262 277
  210 440 510 685 262 277
  275 570 640 795 262 277
  300 620 690 845 262 277
24/25 | 24/63 170 390 460 640 292 312
  210 470 540 720 292 312
  275 600 670 850 292 312
  300 650 720 900 292 312

The offer of ELTOM company also includes earthing switches having a short-circuit making capacity (class E1). Devices are designed to work indoor.

Technical data:

Class durability of electrical earthing

   

UWS12/40/Z/...

UWS12/50/Z/...

UWS24/31,5/Z/...

UWS24/50/Z/...

rated voltage

Ur

kV

12

12

24

24

withstand lighting impulse voltage

Up

kV

70/85

70/85

125/145

125/145

short-time rated withstand current

Ik

kA

40

50

31,5

50

rated time of the short-circuit

tk

s

1

1

1

1

peak rated withstand current

-

kA

100

125

78

125

durability class of electrical of earthing switch

Er

-

E1

E0

E1

E0

Technical drawings:

UWS 12/40/Z/... | UWS 12/50/Z/...
UWS 24/50/Z/...
 

A

B1

B2

B3

UWS 24/50/210

210

446

506

588

UWS 24/50/350

350

726

786

868

All technical data presented in the catalog can be changed due to technological progress.

DECLARATIONS OF CONFORMITY:

Download:

Generate a catalog card (beta):