Surge Arrester

Application principle

Surge arrester LTD4-C40 series (DEHN style)

 

SPD Type 2 according to EN 61643-11

SPD Class II according to IEC 61643-1

Classification C according to E DIN VDE 0675-6

 

- High discharge capacity thanks to powerful zinc oxide varistors / spark gaps

- Low protection level, quick response

- Reliable control thanks to Thermo Dynamic Control disconnector with dual monitoring

- Fault indication by red mark in the inspection window

- Slim design (modular construction) according to DIN 43880

- Multifunctional terminals for connecting conductors and busbars

- Encapsulated, non-extinguishing zinc oxide varistor arrester for use in distributor housings

- Complete prewired unit for common system configurations, consisting of a base part and plug-in protection modules

- Plug-in arrester with dynamic separating device


Technical parameters

 

LTD4-C40

SPD to EN 61643-II

Type 2

SPD to IEC 61643-I

Class II

SPD to VDE 0675-6

Class C

Max. continuous voltage Uc

275 V

320 V

385 V

440 V

Nominal discharge current (8/20μs) In

20 kA

Max. discharge current (8/20μs) Imax

40 kA

Voltage protection level Up

≤ 1.3kV

≤ 1.5kV

≤ 1.8kV

≤ 2.0kV

Response time tA

≤ 25 ns

Max. back-up fuse

125 A gl/gG

Short-circuit withstand current

25kA/50Hz

Operating temperature range TU

-40…+80

Cross-sectional area (min.)

1.5 mm2 solid / flexible

Cross-sectional area (max.)

35 mm2 stranded / 25 mm2 flexible

Mounting on

35 mm DIN rail acc. To EN 60715

Degree of protection

IP 20

Housing material

Thermoplastic; extinguishing degree UL 94 V-0

Remote signaling contact (floating switch)

Yes (optional accessory)

Switch capacity

AC: 250V/0.5A; 125V/3 A

Cross-sectional area for remote signaling terminals

Max. 1.5 mm2 solid / flexible

Dimension drawing LTD4-C40


Basic circuit diagram LTD4-C40


Order information (Let’s take 385V as example)

Type

Description

LTD4-C40/1-385

Class C, Imax: 40kA, 1 pole, 385V, Surge arrester for TN-S, TN-C, IT systems

LTD4-C40/2-385

Class C, Imax: 40kA, 2 pole, 385V, Surge arrester for TN-S systems (Single-phase)

LTD4-C40/3-385

Class C, Imax: 40kA, 3 pole, 385V, Surge arrester for TN-C systems (Three-phase)

LTD4-C40/4-385

Class C, Imax: 40kA, 4 pole, 385V, Surge arrester for TN-S systems (Three-phase)

LTD4-C40/1+FS-385

Class C, Imax: 40kA, 1 pole, FS: floating switch, 385V, Surge arrester for TN-S, TN-C, IT systems

LTD4-C40/2+FS-385

Class C, Imax: 40kA, 2 pole, FS: floating switch, 385V, Surge arrester for TN-S systems (Single-phase)

LTD4-C40/3+FS-385

Class C, Imax: 40kA, 3 pole, FS: floating switch, 385V, Surge arrester for TN-C systems (Three-phase)

LTD4-C40/4+FS-385

Class C, Imax: 40kA, 4 pole, FS: floating switch, 385V, Surge arrester for TN-S systems (Three-phase)

Other voltage available: 275V, 320V, 440V

Shanghai Leitai Electric Co., Ltd. Add: Dong'ao Industry Park, Xiangyang, Yueqing, Wenzhou, Zhejiang 325619  China
Mobile: +86-13806869194 TEL: +86-577-62652173 FAX: +86-577-62624999 Email: sales@surge-arrester.com