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Type 2 surge arrester DG M DC ACI 1250 FM
for electrical installationsremote signalingDC power

Type 2 surge arrester - DG M DC ACI 1250 FM - DEHN + SÖHNE - for electrical installations / remote signaling / DC power
Type 2 surge arrester - DG M DC ACI 1250 FM - DEHN + SÖHNE - for electrical installations / remote signaling / DC power
Type 2 surge arrester - DG M DC ACI 1250 FM - DEHN + SÖHNE - for electrical installations / remote signaling / DC power - image - 2
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Characteristics

Type
type 2
Applications
remote signaling, for electrical installations, DC power, arc protection
Other characteristics
with fault indication, combined, modular, DC, plug-in
Voltage

1,250 V

Primary current

Max.: 20,000 A

Min.: 10,000 A

Description

Overview
  • Universal combined arrester with a base part and a plug-in protection module
  • Device concept specifically developed for use in DC circuits and DC charging equipment
  • Integrated DCD DC switching device reduces risk of fire from DC switching arcs
  • Can be used without additional backup fuse in defined application scenarios
  • Operating / fault state indicated mechanically by green / red flag in the inspection window
  • Tool-free replacement of protection modules via locking system with module release button


Variant — DEHNguard M DC ACI 1250 FM (Part No. 972150)
Modular surge arrester for DC applications; with floating remote signalling contact.
  • Surge protective device Type 2, DG M DC ACI 1250 FM
  • Modular, pluggable surge arrester
  • For DC applications, width of 6 DIN modules
  • Mechanical operating / fault state indication
  • Type 2 arrester similar to EN / IEC 61643-41
  • Consisting of switch / spark gap combination
  • Specially for use in DC charging equipment up to 1,250 V
  • Max. continuous operating voltage (+ --> -): 1250 V DC
  • Nominal discharge current (8/20 µs): 10 kA
  • Max. nominal impulse discharge current (8/20 µs): 20 kA
  • Max. short-circuit withstand capability (ISCCR): 5 kA
  • Floating remote signalling contact as changeover contact


Technical details (Part No. 972150)
  • SPD classification similar to EN 61643-41 / IEC 61643-41 — Type 2
  • Nominal discharge current (8/20 µs) (In) — 10 kA
  • Max. nominal impulse discharge current (8/20 µs) (Imax) — 20 kA
  • Max. short-circuit withstand capability (ISCCR) — 5 kA
  • Type of remote signalling contact — changeover contact
  • Extended technical data — see variant documentation


Additional product information / Tender specification (Part No. 972150)
  • Surge protective device Type 2, DG M DC ACI 1250 FM
  • Modular, pluggable surge arrester
  • For DC applications, width of 6 DIN modules
  • Mechanical operating / fault state indication
  • Type 2 arrester similar to EN / IEC 61643-41
  • Consisting of switch / spark gap combination
  • Specially for use in DC charging equipment up to 1,250 V
  • Max. continuous operating voltage (+ --> -): 1250 V DC
  • Nominal discharge current (8/20 µs): 10 kA
  • Floating remote signalling contact as changeover contact
  • Vibration and shock-tested according to EN 60068
  • Fulfils IEC 61851-23


Technical specifications
  • Product family: DEHNguard ME/SE DC ... (FM)
  • Design: modular combined arrester (base part + plug-in protection module)
  • Intended use: DC circuits, including DC charging equipment (variants up to 1250 V DC)
  • Remote signalling: floating changeover contact (variant dependent)
  • DCD DC switching device: prevents fire damage from DC switching arcs (variant dependent)
  • SPD classification: Type 1+2 or Type 2 depending on variant and configuration
  • Nominal discharge current (8/20 µs): typical values 10 kA or 12.5 kA (variant dependent)
  • Max. nominal impulse discharge current (8/20 µs): up to 20 kA
  • Lightning impulse current (10/350 µs): e.g. 5 kA on combined (ME) variants
  • Voltage protection levels (Up): variant dependent (examples: <0.5 kV, <1.25 kV, <2.0 kV, <3.0 kV)
  • Short-circuit withstand capability (SCCR): variant dependent (examples: 5 kA, 300 A, 25 kA etc. depending on model and backup fuse conditions)
  • Max. continuous operating voltage (UC): variant examples: 60 V DC, 242 V DC, 550 V DC, 900 V DC, 1000 V DC, 1250 V DC
  • Module widths: variants from 1.5 modules up to 6 DIN modules (model dependent)
  • Fault indication: mechanical green / red indicator flag in inspection window
  • Module replacement: tool-free module locking system with release button

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