LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 · LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 38...

SJB accessoriesInterconnecting busbars G..., S... page 93Connecting adapters AS..., CS-FH000..., N3x10-FH000 page 95

Overvoltage protections

LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1

36

Lightning current arrestersI

imp (10/350) μs

[kA]Version Type Product

codeWeight

[kg]Packing

[pcs]35 encapsulated arrester gap SJBpro35 13019 0.16 1

encapsulated arrester gap with electronic ignition release SJBpro35/1,5 14122 150 arrester gap SJBplus50 14424 1

arrester gap with electronic ignition release SJBplus50/1,5 14423 1100 summary arrester gap with electronic ignition release SJB100/NPE/1,5 14425 1

For protection of electric networks and equipment against overvoltage from direct or indirect lightning strokes in the arresting equipment of buildings, LV lines etc.

For protection of electric networks and equipment in family houses, commercial and industrial buildings etc. (SJBplus…shall be used for two-wire power supply)

They reduce voltage and “cut down” the overvoltage wave power caused by direct or indirect lightning stroke

Application: as the fi rst stage (coarse protection) in 3-stage overvoltage protection - type 1 according to EN 61643-11

SJBpro is mainly intended for building applicationsSJBplus is mainly intended for industrial applicationsStandard solution with SJBpro35 and SJBplus50 - it

is recommended, if the length of the line between T1 and T2 (second stage of overvoltage protections) is higher than 10 m

Universal solution with SJBpro35/1,5 and SJBplus50/1,5 - their installation is independent of the length of the line between T1 and T2; therefore they can be installed irrespective of the length of the line

- It is recommended to install them above all, if the length of the line between T1 and T2 is shorter than 10 m, or if the length of the line is not known and there is not time to check the length of the line

- The arresters SJBpro35/1,5 and SJBplus50/1,5 elimi-nate the need of a separation inductance in cases, when the length of the line is shorter than 10 m, save space in switchboards, and increase the transferred power of the distribution system (I

n of the distribution system is

not dependent of In of the separation inductances)

Installation1) : in the main switchboard

SJBpro35 and SJBpro35/1,5Ideal arrester for most building and commercial applicationsMain component is a powerful arrester gap able to arrest

lightning current and to quench the follow-currentQuenching takes place in the device – SJBpro…

requires no exhaust spacePossibility of installation also in common plastic

switchboards (e.g. type ORO, COMBI, ECO, ERA)In use of SJBpro35 (standard solution) it is necessary to

observe the length of the line between T1 and T2 at least 10 m

In use of SJBpro35/1,5 (universal solution) the length of the line between T1 and T22) can be arbitrary. Recommended application is however at the length of the line shorter than 10 m

Voltage protection level for SJBpro35/1,5 is Up = 1.5 kVWidth: 1 module per DIN railSimple interconnection of the rails and with arresters of

type 2

SJBplus50 and SJBplus50/1,5Arresters for demanding applications, industry, power

engineering etc. Main component is a powerful arrester gap able to

arrest lightning current up to 50 kAQuenching of follow-current up to 50 kAIn use of SJBplus50 (standard solution) it is necessary to

observe the length of the line between T1 and T2 at least 10 m

In use of SJBplus50/1,5 (universal solution) the length of the line between T1 and T22) can be arbitrary. Recommended application is however at the length of the line shorter than 10 m

Voltage protection level for SJBplus50/1,5 is Up = 1.5 kVIn installation exhaust space shall be taken into accountWidth: 2 modules per DIN railSimple interconnection of the rails

SJB100/NPE/1,5Application as a summary arrester gap between N and

PE in TN-S or TT network (connection “3+1”)Quenching takes place inside the device -

SJB100/NPE/1,5 requires no exhaust spacePossibility of installation also in common plastic

switchboards (e.g. type ORO, COMBI, ECO, ERA)Width: 2 modules per DIN rail

1) see Recommendations to design, installation and measurement on page 452) If the length of the line between T1 and T2 < 10 m must be with T2 s U

N = 400 V e.g. SVM440-Z, see page 41



37

Specifi cation

Dimensions

35

45 90

58

5.5 43.517.5

9045

58

5.5 43.5

SJBpro35, SJBpro35/1,5 SJB100/NPE/1,5

Type SJBpro35 SJBpro35/1,5 SJBplus50 SJBplus50/1,5 SJB100/NPE/1,5Standards EN 61643-11 EN 61643-11 EN 61643-11 EN 61643-11 EN 61643-11

IEC 61643-1 IEC 61643-1 IEC 61643-1 IEC 61643-1 IEC 61643-1VDE 0675-6 VDE 0675-6 VDE 0675-6 VDE 0675-6 VDE 0675-6

Approval marks

Rated voltage UN 230 V a.c. 230 V a.c. 400 V a.c. 400 V a.c. 230 V a.c.

Maximum constant operating voltage Uc 440 V a.c. 440 V a.c. 440 V a.c. 440 V a.c. 260 V a.c.

Lightning current (10/350 μs) peak value Iimp 35 kA 35 kA 50 kA 50 kA 100 kA

impulse charge Q 17.5 As 17.5 As 25 As 25 As 50 As

specifi c energy W/R 0.305 MJ/Ω 0.305 MJ/Ω 0.625 MJ/Ω 0.625 MJ/Ω 2.5 MJ/Ω

Rated discharge current (8/20 μs) In 35 kA 35 kA 50 kA 50 kA 100 kA

Rated frequency fn 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz

Voltage protection level Up ≤ 4 kV ≤ 1.5 kV ≤ 4 kV ≤ 1.5 kV ≤ 1.5 kV

Arrester classifi cation according to EN 61643-11 type 1 type 1 type 1 type 1 type 1

according to IEC 61643-1 class I class I class I class I class I

according to VDE 0675-6 class B class B class B class B class B

Reaction time ≤ 100 ns ≤ 1000 ns ≤ 100 ns ≤ 1000 ns ≤ 100 ns

Quenching follow-current at 260 V a.c. Ifi 3 kA 3 kA - - 0.1 kA

at 400 V a.c. Ifi - - 50 kA 50 kA -

at 440 V a.c. Ifi 1.5 kA 1.5 kA - - -

Backup fuse gG/gL ≤ 125 A ≤ 125 A ≤ 250 A ≤ 250 A -

Degree of protection IP20 IP20 IP20 IP20 IP20

Mounting on the rail DIN EN 50 022 width 35 mm 35 mm 35 mm 35 mm 35 mm

Connection rigid conductor 0.5 ÷ 35 mm2 0.5 ÷ 35 mm2 10 ÷ 50 mm2 10 ÷ 50 mm2 0.5 ÷ 35 mm2

fl exible conductor 0.5 ÷ 25 mm2 0.5 ÷ 25 mm2 16 ÷ 25 mm2 16 ÷ 25 mm2 0.5 ÷ 25 mm2

interconnecting busbar G-1L-1000/20 G-3L-1000/16C

G-1L-1000/20 G-3L-1000/16C

G-1L-1000/20 G-1L-1000/20 G-1L-1000/20

tightening torque 4.5 Nm 4.5 Nm 8 Nm 8 Nm 4.5 Nm

Ambient temperature -40 ÷ 85 °C -40 ÷ 85 °C -40 ÷ 85 °C -40 ÷ 85 °C -40 ÷ 85 °C

Seismic immunity (8 ÷ 50 Hz) 3 g 3 g 3 g 3 g 3 g



38

Diagram

35

45 151

5.5 43.5

57.5

SJB 50plus

35 5.5 43.5

72.5

45 151

SJB 50/1,5plus

In action of the arrester the ionized gas is exhausted from the rear part of the arrester. The exhaust space is defi ned in Fig. 1. In the exhaust space there must not be any highly or medium combustible material or live bare conductive parts. Minimum distance from materials combustible with diffi culty or non-combustible materials (grade C1, B, A) is defi ned in Fig. 2).

55 mm 55 mm

55 mm55 mm

100 mm

120°

7.5 mm

55 m

m55

mm

1) 2)

250 A gG/gL

SJB 50/1,5plus

Iimp

Uc

Up

50 kA (10/350) µs

AC 440 V

≤ 1,5 kV

250 A gG/gL

SJB 50/1,5plus

Iimp

Uc

Up

50 kA (10/350) µs

AC 440 V

≤ 1,5 kV

250 A gG/gL

SJB 50/1,5plus

Iimp

Uc

Up

50 kA (10/350) µs

AC 440 V

≤ 1,5 kV

L/N ( )

(L/N)

SJB 35pro

L/N ( )

(L/N)

SJB 50plus

L/N ( )

(L/N)

SJB 35/1,5pro

N ( )

(N)

SJB100/NPE/1,5

L/N ( )

(L/N)

SJB 50/1,5plus

Exhaust space of SJBplus...

Interconnecting systems

INTERCONNECTING BUSBARS AND END CAPS

93

Interconnecting busbarsFor interconnection of 1 to 4-pole circuit breakers, tumbler

power switches, residual current circuit breakers, lightning current arresters and surge voltage arresters

For interconnection of a series of single-phase or three-phase circuit breakers and tumbler power switches, on which an auxiliary switch is mounted

Busbars G-… with forks into the head part of the device Busbars S-… with pins into the clip part of the device

End cap EK-C-3:To cover end of busbar G-3L-1000/10C

End cap EK-C-2+3:To cover end of busbar G-2L-1000/16, G-3L-1000/16C,

S-3L-27-1000/16

End cap EK-C-3/36:To cover end of busbar S-3L-27-1000/25

End cap EK-C-4/16:To cover end of busbar G-4L-1000/16

Specifi cation

Diagram

G-4LG-3L, S-3LG-2LG-1L, S-1L

L1 L2(N)

L1 L1 L2 L3 L3L1 L2 N

Type G-1L, G-2L, G-3L, G-4L, S-1L, S-3LRated operating voltage U

e 230/400 V a.c., 220/440 V d.c.

Load current 63 ÷ 180 ALength 210, 1000 mmCross-section 10 ÷ 25 mm2

Interconnecting busbarsPhase Cross - Max. current at power Length Type Product Accessories to Weight Packing

section supply of [A/phase] [mm] code [kg] [pcs][mm2] end middle

1 12 65 110 1000 G-1L-1000/12 00171 LSN, LSE, ASN 0. 22 50G-1L-1000/12g 1) 00170 LSN, LSE, ASN 0.1 50

16 80 130 210 S-1L-210/16iso 13012 LSN, LSE, SVL, SJL, ASN 0.045 5020 90 150 1000 G-1L-1000/20 00172 LSN, LSE, SJB, SVM, ASN 0.36 5024 100 180 1000 G-1L-27-1000/24 2) 11001 LSN, LSE, ASN 0.3 50

2 16 80 130 1000 G-2L-1000/16 11179 LSN, LSE, LFI, LFE, OFI, OFE, ASN 0.46 203 10 63 100 1000 G-3L-1000/10C 00173 LSN, LSE, ASN 0.44 20

16 80 130 1000 G-3L-1000/16C 00174 LSN, LSE, OFI, OFE, SJB, SVM, ASN 0.72 20G-3L+9-1000/16 2) 11002 LSN, LSE, ASN 0.66 10S-3L-27-1000/16 3) 11864 LSN, LST, LSE, ASN, AST 0.52 20

25 100 180 1000 S-3L-27-1000/25 3) 11865 LSN, LST, LSE, ASN, AST 0.96 104 16 80 130 1000 G-4L-1000/16 11180 LSN, LSE, OFI, OFE, ASN 0.96 151) The busbar is uninsulated2) For 1-pole or 3-pole devices with an auxiliary switch3) For 3-pole LST; for 1-pole LSN, LSE, ASN with an auxiliary switch

End capsType Product Accessories to Weight Packing

code [kg] [pcs]EK-C-3 00178 G-3L-100/10C 0.001 10EK-C-2+3 00181 G-2L-1000/16, G-3L-1000/16C, S-3L-27-1000/16 0.001 10EK-C-3/36 11176 S-3L-1000/25 0.002 10EK-C-4/16 11181 G-4L-1000/16 0.002 10


INTERCONNECTING BUSBARS AND END CAPS

94

Dimensions

G-1L-1000/12 G-1L-1000/12g

S-1L-210/16iso

996.8 (56x17.8)

17.857x1

6

126 1.5

14

5 14

996.8 (56x17.8)

17.857x1

3

6 1

12

195.8 (11x17.8)

12x1417.8

14

1.5

14

5996.8 (56x17.8)

57x1

6

17.8 126

14

5

2

15

972 (36x27)

37x1

6

627 12 2

155

14

979 (55x17.8)

28x2

6

617.8 11

17

29

1.5

15

996.8 (56x17.8)

17.8

6

19x3 6 11

15

26

13.5

1

996.8 (56x17.8)

17.8

6

19x3 6 11

30

17

15

1.5

971.6 (47x17.8+15x9)

16x3

6

26.8 (+9)17.8 612

29

14

24.5

1.5

938 (35x26.8)

26.816x3

4

29

17

15

1.5

945 (35x27)

2716x3

6.5

43

18.3

27

2

979 (55x17.5)

14x4

6

11617.8 1.5

20.5

30

17

G-1L-1000/20

G-1L-27-1000/24 G-2L-1000/16

G-3L-1000/10C G-3L-1000/16C

G-3L+9-1000/16C S-3L-27-1000/16

S-3L-27-1000/25 G-4L-1000/16


CONNECTING ADAPTERS AND BLOCKS

95

Connecting adapter AS/25-GNAccessories to: LSN, LSE, LFI, LFE, OFI, OFE, SJB, SVM,

ASNFor connection of another conductor to the head part of the

terminal of a circuit breaker or tumbler power switchFor example, it the best solution is to connect a conduc-

tor for power supply of an electric meter in the clip part of the circuit breaker terminal, and another conductor through the connecting adapter AS/25-GN in the head part of the circuit breaker terminal

Conductor cross-section: 6 ÷ 25 mm2

Connecting adapter AS/25-SNAccessories to: OFI20, OFE20, SVL, SJL, RP1For connection of conductor to the clip part of the

terminal of a circuit breaker or tumbler power switchConductor cross-section: 6 ÷ 25 mm2

Connecting adapter AS-AL/Cu-16-50Accessories to: LSN, LST, LSE, LFI, LFE, SJBplus, ASN, ASTFor connection of Al or Cu conductorsCross-section of Cu conductors: 2.5 ÷ 50 mm2

Cross-section of Al conductors: 16 ÷ 50 mm2

Connecting adapter CS-FH000-...NP95Accessories to: LST, SJBplus, SJB100/NPE/1,5, ASTFor connection of Cu/Al conductors of cross-section

35 ÷ 95 mm2 Connecting adapter with straight terminal

Connecting adapter CS-FH000-3NV95Accessories to: LST, SJBplus, SJB100/NPE/1,5, ASTFor connection of Cu/Al conductors of cross-section

35 ÷ 95 mm2

Connecting adapter with outbowed terminal

Connecting adapter N3x10-FH000Accessories to: LST, SJB, SVM, ASTFor connection of 3 conductors/pole of the device of

cross-section 10 mm2

Connection block ES/35S/GAccessories to: G-1L, G-2L, G-3L, G4-L, S-1L, S-3LIt enables power supply of interconnecting busbars of

conductors of section up to 35 mm2

The blocks can be installed in series to create a multiple-pole connection block

Degree of protection IP20

Dimensions

Connecting adaptersType Product Weight Accessories Set Packing

code [kg] to [pcs] [pcs]AS/25-GN 00177 0.012 LSN, LSE, LFI, LFE, OFI, OFE, SJB, SVM, ASN 1 10AS/25-SN 00176 0.013 OFI20, OFE20, SVL, SJL, RP1 1 10AS-AL/Cu-16-50 18351 0.016 LSN, LST, LSE, LFI, LFE, SJBplus, ASN, AST 1 15CS-FH000-3NP95 13740 0.1 LST, SJBplus, SJB100/NPE/1,5, AST 3 1CS-FH000-1NP95 14378 0.1 LST, SJBplus, SJB100/NPE/1,5, AST 1 1CS-FH000-3NV95 13742 0.1 LST, SJBplus, SJB100/NPE/1,5, AST 3 1N3x10-FH000 14127 0.02 LST, SJB, SVM, AST 3 1

Connection blockType Product Weight Packing

code [kg] [pcs]ES/35 S/G 00175 0.03 10

6-256-25

6-2520.5

15 17

25.5

16.5 22

27

24.5 17.5

AS/25-SN AS-Al/Cu-16-50 N3x10-FH000

20.5

15 17

AS/25-GN

32.5 32.52424

38 38

25.5

32

17.5

CS-FH000-...NP95 CS-FH000-3NV95 ES/35 S/G

6-25

6-25

For branching or connection of conductors PEN, PE, N and LThey are used in switchboards, which are not delivered

with terminal blocks

Mounting: on the rail DIN EN 50 022 - width 35 mmColour: green, blue, black


TERMINAL STRIPS

96

Dimensions

51.5

5.5

4.525

23.523

23

6

8551.5

5.5 23.5

4.525

23

6

104

51.5

5.5

4.525

23.5

PE7, N7, L7 PE12, N12, L12

PE15, N15, L15

Terminal stripsColour Number x maximum terminal range Type Product Weight Packing

[pcs x mm2] code [kg] [pcs]7 x 16 PE7 11124 0.026 10

(green) 12 x 16 PE12 11125 0.042 1015 x 16 PE15 11126 0.048 107 x 16 N7 11121 0.026 10

(blue) 12 x 16 N12 11122 0.042 1015 x 16 N15 11123 0.048 107 x 16 L7 11127 0.026 10

(black) 12 x 16 L12 11128 0.042 1015 x 16 L15 11129 0.048 10

Type PE, N, LStandards EN 60 947-1Approval marks

Mounting on the rail DIN EN 50 022 - width 35 mm

Connection 1 ÷ 16 mm2, 2x (1 ÷ 4) mm2

Seismic immunity (8 ÷ 50 Hz) 1.5 g

Specifi cation


RECOMMENDATIONS TO DESIGN, INSTALLATION AND MEASUREMENT

45

Fig. 1. Overvoltage categories and impulse withstand voltage Uimp

(1,2/50 µs) for individual parts of a building and for mains voltage 230/400 V a.c. – according to IEC 664-1.

lift

flats

appliances

1,5 kV1,5 kV

6 kV6 kV4 kV4 kV 2,5 kV2,5 kV

U(1

.2/5

0 µs

)im

p

Overvoltagecategory I

Light-currentappliances

Overvoltagecategory IIAppliance

Overvoltagecategory IIIFixed wiring

Overvoltagecategory IVOutside lead

100 200 300350

t [µs]

20

15

7.5

25

50I,I

[kA]

imp

n

400

50 kA (10/350 s)µ

15 kA (8/20 µs)

Fig. 2. Wave form and energy 8/20 µs and 10/350 µs (the arrested energy corresponds to the area below the curve)

GeneralProtection of buildings and electrical equipment against

lightning eff ects and overvoltage is carried out both outside and inside the building. External protection de-vices include lightning traps, conductor arresters, earth-ing systems, discharge arresters etc. Internal protection measures include equipotential bonding, screening etc.

The basis of internal protection against lightning eff ects and overvoltage is protective equipotential bonding i.e. connection of all metallic wiring to an equipotential EP busbar (EP – equipotential point). This eliminates potential diff erences in the wiring over a permissible limit with subsequent damaging discharge.

Lightning current arresters and surge voltage arresters are the elements of internal protection. They connect power cables to the EP busbar indirectly through ar-rester gaps and varistors and thus reduce overvoltage. The overvoltage reduction is normally carried out in 3 stages. Each stage shall reduce overvoltage to a level defi ned by IEC 664-1 for overvoltage categories. The arresters of stages 1 to 3 are installed on the interface of individual overvoltage categories – see Fig. 1.

Stage 1 – coarse protection – type 1 This protection is provided lightning current arresters SJB, which arrest the biggest part of the overvoltage wave, and must be able without damage to divert lightning currents or their substantial parts. It is possible to deduct from IEC 61312-1 and IEC 61024-1 that in the most adverse case with 2 or 4-wire power lead the lightning current arresters must arrest 50 kA per pole or 25 kA per pole of impulse current with the waveform 10/350 µs. Such parameters can only be achieved with the devices designed on the arrester gap basis.

Stage 2 – medium protection – type 2This protection is provided by varistor-based surge voltage arresters SVL, SJL, SVM, which must be able to divert without damage atmospheric surges or overvoltage from switching processes in the network with waveform 8/20 µs. Under corresponding conditions they can be installed without the front-end 1st stage e.g. in the main switchboard, see the table Selection of the number of protection stages and types. However in most cases they are installed after the lightning current arresters, which reduce overvoltage and “cut down” the energy of the overvoltage wave. See Fig. 2 for visual comparison of the energies diverted by the lightning current

arrester 50 kA and surge voltage arrester 15 kA.Surge voltage arresters are rated at a specifi c heat output.

If there is high power or too frequent overvoltage in the network, the heat output can be exceeded and the surge voltage arrester is disconnected by its disconnecting device. After disconnection the surge voltage arresters are nonfunc-tional and must be replaced. The disconnection is indicated both optically and remotely.

In insulation measurement it is necessary to disconnect the arresters from the earth to get undistorted results.

Stage 3 – fi ne protection – type 3 To ensure really reliable protection it is necessary to comple-ment the above types 1 and 2 by the last one – type 3. The basic elements of the fi ne protection are varistors and sup-pressor diodes able to divert the overvoltage with waveform 8/20 µs. It is recommended to install this protection directly at the protected appliance, without a long cable between the arrester and the appliance. Otherwise, when a long cable is installed between the last stage and the appliance, volt-age may rise in the conductors over a permissible level (e.g. due to induction).



46

The design of overvoltage protection in a low-voltage distri-bution system consists in two steps, in particular:

1) Selection of the number of protection stages and types2) Selection of overvoltage protections

Note: Recommended procedure does not include all cases and circumstances

1) Selection of the number of protection stages and types – This is one of the main and the fi rst decisive criterion in designing overvoltage protection. First of all, in the table Selection of the number of protection stages and types, it is necessary to fi nd corresponding exposure (big, medium or small) of the building to be protected, and, after it, to determine corresponding sensitivity (big, medium or small) to overvoltage

of appliances, which are installed in the building. The number of protection stages and types is determined at the intersection. Note that the best and safest solution is installation of all three protection stages.

2) Selection of overvoltage protectionsSelection of T1 and T2From the previous paragraph, the number of stages and types of protection are known, and now it is necessary to determine specifi c products. If both T1 and T2 are selected for protection, use the table Selection of overvoltage protections T1 and T2, which is divided by other important criteria such as length of the line be-tween T1 and T2, network type etc. If protection T1 is not chosen, it is possible to select the protection T2 arbitrarily, depending on

utilization properties of individual off ered types (SVL, SJL, SVM).

Selection of T3Protection T3 (if selected) is chosen from SVD205M-ZS (on the DIN rail) and SVD250-ZS (in wiring box, raceway, etc.). The arresters of the last stage are installed as close as possible to the end device. Otherwise, should a long cable be between the last stage and the appliance, voltage could have risen over a permissible level (e.g. due to induction) in conductors. On the other hand, if the protected device is in the distance shorter than 5 m from the second stage, it is not necessary to install the third stage. The second stage will provide suffi cient protec-tion. The surge voltage arresters T3 must always be installed after the surge voltage arrester T2.

Recommended procedure of design of overvoltage protection in low-voltage distribution system

ExampleSituationAdministrative building of an industrial plant is supplied with 3x230/400 V AC (network TN-C) by a buried cable, and has a lightning conductor. It is equipped with PC, TV, refrigerators, microwave ovens etc. The system is divided into TN-C-S in the main switchboard. The length of the line between the main and subdistribution switchboard is 17 m. It is assumed that T1 and T2 will be installed in the main and subdistribution switchboards respectively. T3 protection is assumed in the raceway.

SolutionFrom the fi rst table: building exposure – big, sensitivity of installed appliances to overvoltage – big. The result is the recommended installation of T1 + T2 + T3.From the second table: standard solution chosen for building ap-plications in the system TN-C-S; therefore the result are these ar-resters – 3x SJBpro35 and 3x SVM275-Z(S) + 1x SVM260/NPE-Z. This solution has been chosen for the following reasons: - buried supply cable, which eliminates the hazard of direct lightning stroke into the line - length of the line between T1 and T2 is higher than 10 metres - T1 does not require an exhaust space

According to the paragraph “Selection of T3”, select appropriate number of protection units SVD250-ZS.

Selection of overvoltage protections T1 and T2Solution Length of the line

between T1 and T2Application Network 1) Protection

typeRecommended arrester type

Standard

> 10 m

Building TN-C T1 3x SJBpro35T2 3x SVL275(S) nebo 3x SJL275(S) nebo 3x SVM275-Z(S)

TN-C-S T1 3x SJBpro35T2 3x SVM275-Z(S) + 1x SVM260/NPE-Z

TN-S T1 3x SJBpro35 + 1x SJB100/NPE/1,5T2 3x SVM275-Z(S) + 1x SVM260/NPE-Z

Industrial TN-C T1 3x SJBplus50T2 3x SVL275(S) nebo 3x SJL275(S) nebo 3x SVM275-Z(S)

TN-C-S T1 3x SJBplus50T2 3x SVM275-Z(S) + 1x SVM260/NPE-Z

TN-S T1 3x SJBplus50 + 1x SJB100/NPE/1,5T2 3x SVM275-Z(S) + 1x SVM260/NPE-Z

Universal

arbitrary(recommendedsolution at the length of the line <10 m)

Building TN-C T1+T2 3x SJBpro35/1,5(TN-C-S) 3x SVM440-Z(S)TN-S T1+T2 3x SJBpro35/1,5 + 1x SJB100/NPE/1,5

3x SVM440-Z(S) + 1x SVM260/NPE-ZIndustrial TN-C T1+T2 3x SJBplus50/1,5

(TN-C-S) 3x SVM440-Z(S)TN-S T1+T2 3x SJBplus50/1,5 + 1x SJB100/NPE/1,5

3x SVM440-Z(S) + 1x SVM260/NPE-Z1) For individual networks, connection is assumed as shown on pages 48 and 49.

Selection of the number of protection stages and types

BUILDING EXPOSUREBIG MEDIUM SMALL

- power plants, hospitals, industrial buildings, public buildings with high number of visitors etc.

- individual housing units, family houses in high-density development etc.

- individual housing units, family houses in high-density development etc.

or and at the same time and at the same time

- buildings in mountain regions, free-standing buildings, buildings close to HV and EHV lines etc.

- buildings in high-density development comparable with or not exceeding the other buildings

- buildings in high-density development enclosed by many higher buildings

or and at the same time and at the same time

- buildings with external lightning protection (light-ning conductor), with outdoor power supply,grounded roof superstructure (aerial) etc..

- buildings with connection by a short overhead line from power supply transformer (tens of meters)

- buildings in high-density development with buried cable supply lead

BIG - PC, TV, Hi-Fi system etc. T1 + T2 + T3 T2 + T3 T2 + T3

MEDIUM – washing machines, refrigerators etc.

T1 + T2 + T3 T2 T2

SMALL – motors, fans etc. T1 +T 2 T2 T2

Appl

ianc

e se

nsiti

vity

to

over

volta

ge



47

1. Installation of lightning current arresters – T1Lightning current arresters, i.e. the arresters of type 1, are installed above all in the main switchboard on the DIN rail. Installation of the lightning current arresters in metering switchboards shall be approved by relevant power distribution companies. In not measured area, use lightning current arresters SJBplus50 or SJBpro35.

2. Installation of surge voltage arresters – T2Surge voltage arresters T2 are installed on the DIN in:

subdistribution switchboard after the lightning current arrester at the length of the line between T1 and T2 ≥ 10 m: it is possible to use any surge voltage arrester of type 2main switchboard together with the lightning current arrester or in the subdistribution switchboard after the lightning current arrester; at the length of the line between T1 and T2 < 10 m, it is necessary to use either the combination (SJBpro35/1,5 + SVM440-Z) or (SJBplus50/1,5 + SVM440-Z)main switchboard separately under corresponding condi-tions (without backup lightning current arrester)

3. Installation of surge voltage arresters – T3The arresters are installed either on the DIN rail (SVM250M-ZS) or in a wiring box or raceway (SVD250-ZS). If the length of the line between T2 and T3 < 5 m, it is not necessary to use T3 – protection is suffi ciently provided by the surge voltage arrester T2. Surge voltage arresters of 3rd stage can be connected to the line both continuously (see wiring diagram example 3b) and transversely (see wiring diagram example 3a). Transverse connection to the line is advantageous in particular if the current fl owing through the line is higher than the permitted loading current I

L of the surge voltage arrester T3.

1) T2 must be with UN = 400V, i.e. SVM440-Z(S)

2) Installation is independent of the length of the line between T1 and T2; therefore they can be installed irrespective of the length of the line. It is recommended to install them above all, if the length of the line between T1 and T2 is shorter than 10 m, or if the length of the line is not known and there is not time to check the length of the line (universal solution).

1. Protection of lightning current arresters – T1Protection can be implemented in two ways:

Protection only by fuses F1 in service box, if F1 correspond to the values stated in the table of technical parameters of given type. However if in such wiring there are leakages and follow short-circuit currents, though the SJB arresters are able to quench the follow short-circuit current, F1 may blow with subsequent interruption of the power supply in the building. Use of fuses F2 in addition to F1 if the latter are too big or if you do not want to interrupt the power supply so frequently. In this case selectivity must be ensured between F1 and F2 i.e. I

nF1 ≥ 1.6xI

nF2

In these ratios of rated currents the fuse F2 will cut

out sooner than F1, and the power supply will not be interrupted so frequently. However the values I

nF2

may be low, and F2 will blow more frequently. For this reason it is recommended to equip the fuse F2 with a signalling device.

2. Protection of surge voltage arresters – T2The previous paragraph applies also to the protection of surge voltage arresters, however in Wiring diagram examples these fuses are designated F3. The surge voltage arresters however do not quench the follow current; the varistor increases its resistance after the conduction of the current impulse into the earth until earth-leakage current ceases to fl ow through the surge voltage arrester due to big resistance of the varistor.

3. Protection of surge voltage arresters – T3Surge voltage arresters SVD250M and SVD250 shall be protected by circuit breakers or fuses gG/gL max. 20 A and 16 A respectively.

4. Protection of arresters for connection “3+1”Arresters for connection between N and PE conductors, i.e. the arrester SJB100/NPE/1,5 for the fi rst stage and SVM260/NPE-Z for the second stage are not protected separately, because their protection is already provided by the fuses F1, F2 and F3, see the wiring diagram examples.

Till lately it was necessary to use the separation inductance for power control between the lightning current arresters and surge voltage arresters, i.e. between 1st and 2nd stage (between T1 and T2) of overvoltage protections, if the length of the line between T1 and T2 was shorter than 10 m.

Now it is possible to use new lightning current arresters SJBpro35/1,5 and SJBplus50/1,5, which are equipped with an electronic ignition release. Thanks to it, these lightning current arresters in combination with a surge voltage arrester1) can be installed directly side-by-side or in a distance shorter than 10 m without the need of installation of the separation inductance (see the fi gure). This principle of overvoltage protection is suitable for both:

building applications (SJBpro35/1,5) and industrial applications (SJBplus50/1,5)

where it is not possible to install T1 and T2 separately. Another undisputable advantage of the new functional principle is the value of the voltage protection level U

p = 1.5 kV. In addition

SJBpro35/1,5 has been designed in such a way that it requires no exhaust space and thus can be installed even in common plastic switchboards. SJBplus50/1,5 can quench the follow current up to 50 kA without backup fuse, and saves protective elements in many applications.

Advantages of these lightning current arresters can be sum-marized as follows

no separation inductance is neededlany distance between arresters T1 and T2

- universal solution2)

saving of space in the switchboardsubstantial increase in transferred power - I

n of the dis-

tribution system does not depend on In of the separation

inductancelower loading of the installation – voltage protection

level Up = 1.5 kV

possibility of installation in common plastic switch-boards - quenching takes place inside the device (SJBpro35/1,5)

saving of protective elements – ability of quenching of follow current up to 50 kA without backup fuse (SJBplus50/1,5)

Function principleBeside the lightning current arrester (SJBpro35/1,5 or SJBplus50/1,5) there is a varistor-base surge voltage arrester1). If overvoltage wave comes to these arresters, it is fi rst diverted by T2 i.e. the surge voltage arrester. As soon as the value of the overvoltage wave reaches the voltage

protection level of the lightning current arrester Up = 1.5 kV,

during the protection process, the arrester gap is ignited by means of the ignition release. The overvoltage wave is now limited by the lightning current arrester, which also relieves the surge voltage arrester T2. Thus the electronic ignition release monitors continuously the level of overvoltage in the line, and ignites the arrester gap of the lightning current arrester at a suitable moment, and eliminates destruction of the surge voltage arrester T2.

LIGHTNING CURRENT ARRESTERS WITH ELECTRONIC IGNITION RELEASE

or SJB 35/1,5 SJB 50/1,5pro plus SVM440-Z(S)

Separation inductanceElectronic ignition

release

10 m

Lightning current arrester(T1)

Surge voltage arreste(T2)

INSTALLATION OF OVERVOLTAGE PROTECTIONS

PROTECTION OF OVERVOLTAGE PROTECTIONS



48

Wiring diagram examples

EP

EP

EP EP

F3

L1 L2 L3 PEN

F1 F1

F2

EPEP

F3

L1 L2 L3 PEN

F2

EPEP

F3F3

L1 L2 L3 PEN

L1 L2 L3 PEN

EPEP

L1 L2 L3 N PE

L1 L2 L3 N PE

L1 L2 L3 N PE

L1 L2 L3 N PE

EP

EP

EP

EP

EP EP

F1

L1 L2 L3 N PE

F1

F2 F2

F3 F3

L1 L2 L3 N PE

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SJB

35pr

o

Uc

Up

I imp

35 k

A

(10/

350)

µs

AC 4

40V

≤4

kV

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

2 75

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

2 75

Uc

Up

I n I ma

x40

kA

(8/2

0)µs

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

2 75

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

275

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

SVM

2 75

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

75V

≤1,

35 k

V

125

A g

G/g

L

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

60V

≤1

kV

N-P

E

SVM2

60/N

P E

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

60V

≤1

kV

N-P

E

SVM2

60/N

PE

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

60V

≤1

kV

N-P

E

SVM2

6 0/N

PE

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 2

60V

≤1

kV

N-P

E

SVM2

60/N

PESJ

B10

0/N

PE/1

,5

I imp

100

kA(1

0/35

0) µ

s

Uc

AC 2

60V

Up

≤1,

5 kV

N-P

E

SJB

100/

NPE

/1,5

I imp

100

kA(1

0/35

0)µs

Uc

AC 2

60V

Up

≤1,

5 kV

N-P

E

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

SJB

50pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤4

kV

250

A g

G/g

L

3x S

JB35

pro

3x S

JB50

plus

3x S

JB35

pro

+1x

SJB

100/

NPE

/1,5

3x S

JBpl

us50

+1x

SJB

100/

NPE

/1,5

3x S

VM27

5-Z(

S)3x

SVL

275(

S)3x

SJL

275(

S)

3x S

VM27

5-Z(

S)3x

SVL

275(

S)3x

SJL

275(

S)

3x S

VM27

5-Z(

S)+

1x S

VM26

0/N

PE-Z

3x S

VM27

5-Z(

S)+

1x S

VM26

0/N

PE-Z

3x S

VM27

5-Z(

S)+

1x S

VM26

0/N

PE-Z

3x S

VM27

5-Z(

S)+

1x S

VM26

0/N

PE-Z

G-1

L-10

00/2

0G

-1L-

1000

/20

S-1L

-210

/16i

soS-

1L-2

10/1

6iso

G-1

L-10

00/2

0S-

1L-2

10/1

6iso

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

G-1

L-10

00/2

0

L1 L2 L3 PEN

L1 L2 L3 PEN

F1 F1 F1

F2 F2 F2

EPEP

F3

L2 L3 PEN

L1L2 L3 PE

N

L1F1

F2F3

L1 L2 L3 PEN

L1 L2 L3 N PE

L1 L2 L3 N PE

SJB

35SJ

B50

pro

plus

SJB

35SJ

B50

pro

plus

SVM

275-

Z(S)

SVM

275-

Z(S)

SVL2

75(S

)SJ

L275

(S)

SVM

260/

NPE

-Z

F1

F2F3

L1 L2 L3 N PE

SJB

35SJ

B50

pro

plus

SVM

275-

Z(S)

SVM

260/

NPE

-ZSJ

B100

/NPE

/1,5

TN-C

TN-C

-STN

-STN

-C-S

3x S

JB35

pro

3x S

JB50

plus

G-1

L-10

00/2

0

G-1

L-10

00/2

0

1. S

tand

ard

solu

tion

Rec

omm

ende

d co

nnec

tion

at th

e le

ngth

of t

he li

ne b

etw

een

T1 a

nd T

2 >

10 m

Bui

ldin

g ap

plic

atio

ns

Indu

stria

l app

licat

ions



49

L1 L2 L3 PEN

L1 L2 L3 PEN

L1 L2 L3 N PE L1 L2 L3 N PE

EP

EP

L1 L2 L3 N PE L1 L2 L3 N PE

SJB

35/1

,5SJ

B50

/1,5

pro

plus

SVM

440-

Z

SJB1

00/N

PE/1

,5

2.U

nive

rzál

ní ře

šení

nezá

vislé

na

délc

e v e

dení

; dop

oruč

ené

zapo

jení

při

délc

e ve

dení

mez

i T1

a T2

< 1

0 m

(níž

e js

ou p

říkla

dy p

ři nu

lové

dél

ce v

eden

í - s

vodi

če js

ou p

římo

u se

be)

TN-C

(TN

-C-S

)1 )

Dom

ovní

apl

ikac

e

TN-S

F1 F1

F2

F2

EP EP

SVM

440-

Z

SJB

100/

NPE

/1,5

I imp

100

kA(1

0/35

0) µ

s

Uc

AC 2

60V

Up

≤1,

5 kV

N-P

E

SJB

35/1,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SJB

35/1,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SJB

35/1,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SJB

35/1 ,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SJB

35/1,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SJB

35/1,

5pr

o

I imp

Uc

Up

35 k

A

(10/

350)

µs

AC 4

40V

≤1,

5 kV

125

A g

G/g

L

SVM

4 40

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

4 40

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

3x S

JB35

/1,5

pro +

3x S

VM44

0-Z

+1x

SJB

100/

NPE

/1,5

G-1

L-10

00/2

0

G-3

L-10

00/1

6C

TT, I

T sí

ťě -

zapo

jení

pos

kytn

eme

na d

o taz

na

li nce

tech

nick

é po

dpor

y (te

l.46

5 67

2 19

0)

Mís

to i n

stal

ace

přep

ěťo v

ých

ochr

an a

bod

rozd

ělen

ína

vod

iče

PE a

N s

e př

edpo

klád

á v

hla v

ním

rozv

áděč

i.Z

toho

to d

ůvod

u je

zap

ojen

í sv o

dičů

ste

jné

jako

pro

síť T

N-C

1 )

L1 L2 L3 PEN

L1 L2 L3 PEN

F1 F1

F2 F2

SJB

35/1

,5SJ

B50

/1,5

pro

plus

3x S

JB35

/1,5

pro +

3x S

VM44

0-Z

G-1

L-10

00/2

0

G-3

L-10

00/1

6C

L1 L2 L3 PEN

L1 L2 L3 N PE

L1 L2 L3 N PE

Prům

yslo

vé a

plik

ace

F1L1 L2 L3 PE

N

EP

F1

F2F2

EP

SJB

100/

NPE

/1,5

I imp

100

kA(1

0/35

0) µ

s

Uc

AC 2

60V

Up

≤1,

5 kV

N-P

E

SVM

4 40

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

S VM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

440

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

4 40

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L

SVM

4 40

Uc

Up

I n I ma

x40

kA

(8/2

0) µ

s

20 k

A

AC 4

40V

≤2,

2 kV

125

A g

G/g

L25

0 A

gG

/gL

SJB

50/1

,5pl

u s

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

250

A g

G/g

L

SJB

50/1

,5pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

250

A g

G/g

L

SJB

50/1

,5pl

u s

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

250

A g

G/g

L

SJB

50/1

,5pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

250

A g

G/g

L

SJB

50/1

,5pl

u s

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

250

A g

G/g

L

SJB

50/1

,5pl

us

I imp

Uc

Up

50 k

A(1

0/35

0) µ

s

AC 4

40V

≤1,

5 kV

3x S

JB50

/1,5

plus +

3x S

VM44

0-Z

G-1

L-10

00/2

0G

-1L-

1000

/20

G-1

L-10

00/2

0

3x S

JB35

/1,5

pro +

3x S

VM44

0-Z

+1x

SJB

100/

NPE

/1,5

G-1

L-10

00/2

0

Bui

ldin

g ap

plic

atio

ns

Indu

stria

l app

licat

ions

2. U

nive

rsal

sol

utio

nIn

depe

nden

t of t

he le

ngth

of t

he li

ne; r

ecom

men

ded

conn

ectio

n in

the

leng

th o

f the

line

bet

wee

n T1

and

T2

< 10

m (b

elow

are

exa

mpl

es w

ith z

ero

leng

th o

f the

line

- ar

rest

ers

are

next

to e

ach

othe

r)

TT,

IT n

etw

orks

– w

iring

dia

gram

can

be

prov

ided

on

requ

est f

rom

Tec

hnic

al S

uppo

rt

1 ) T

he in

stal

latio

n of

the

arre

ster

s and

the

poin

t of d

ivisio

n in

to

PE a

nd N

con

duct

ors

are

assu

med

in th

e m

ain

switc

hboa

rd.

For

this

reas

on th

e wi

ring

diag

ram

of t

he a

rrest

ers

is th

e sa

me

as th

at fo

r TN-

C ne

twor

k.



50

Wiring diagram examples

SVD250M

UocUp

UcIL 20 A

AC 253 V

6 kV≤ 1,5 kV

20 A gG/gL

F4

L1NPE

L1NPE

F4

L1NPE

L1NPE

3. Svodiče přepětí T3

a) příčné zapojení b) průběžné zapojení

SVD250M

UocUp

UcIL 20 A

AC 253 V

6 kV≤ 1,5 kV

20 A gG/gL

3. Surge voltage arresters T3

a) transversal connection b) continuous connection

LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 · LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 38...

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Transcript of LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 · LIGHTNING CURRENT ARRESTERS - STAGE 1 - TYPE 1 38...