Datasheet

© DEHN + SÖHNE GmbH + Co. KG · Hans-Dehn-Str. 1 · Postfach 1640 · D-92306 Neumarkt · Tel. [phone] · www.dehn.de
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: Tested +: New (: Discontinued Model
Product Data Sheet: DEHNguard® modular
DG M TT 275 FM (952 315)
■ Prewired complete unit consisting of a base part and plug-in protection modules
■ High discharge capacity due to heavy-duty zinc oxide varistors / spark gaps
■ High reliability due to "Thermo Dynamic Control" SPD monitoring device
Figure without obligation
Basic circuit diagram DG M TT 275 FM Dimension drawing DG M TT 275 FM
Modular surge arrester for use in TT and TN-S systems (3+1 configuration); with floating remote signalling contact.
Type
DG M TT 275 FM

Part No.
952 315

SPD according to EN 61643-11 / IEC 61643-11
type 2 / class II

Energy coordination with terminal equipment (≤ 10 m)
type 2 + type 3

Nominal voltage (a.c.) (U
N
)
230 / 400 V (50 / 60 Hz)

Max. continuous operating voltage (a.c.) [L-N] (U
C
)
275 V (50 / 60 Hz)

Max. continuous operating voltage (a.c.) [N-PE] (U
C
)
255 V (50 / 60 Hz)

Nominal discharge current (8/20 µs) (I
n
)
20kA

Max. discharge current (8/20 µs) (I
max
)
40kA

Lightning impulse current (10/350 µs) [N-PE] (I
imp
)
12kA

Voltage protection level [L-N]/[N-PE] (U
P
)
≤ 1.5 / ≤ 1.5kV

Voltage protection level [L-N] / [N-PE] at 5 kA (U
P
)
≤ 1 / ≤ 1.5kV

Follow current extinguishing capability [N-PE] (I
fi
)
100A
rms

Response time [L-N] (t
A
)
≤ 25ns

Response time [N-PE] (t
A
)
≤ 100ns

Max. mains-side overcurrent protection
125A gG

Short-circuit withstand capability for max. mains-side overcurrent
protection (I
SCCR
)
50kA
rms

Temporary overvoltage (TOV) [L-N] (U
T
) – Characteristic
335 V / 5 sec. – withstand

Temporary overvoltage (TOV) [L-N] (U
T
) – Characteristic
440 V / 120 min. – safe failure

Temporary overvoltage (TOV) [N-PE] (U
T
) – Characteristic
1200 V / 200 ms – withstand

Operating temperature range (T
U
)
-40 °C ... +80 °C

Operating state / fault indication
green / red

Number of ports
1

Cross-sectional area (min.)
1.5 mm
2
solid / flexible

Cross-sectional area (max.)
35 mm
2
stranded / 25 mm
2
flexible

For mounting on
35 mm DIN rails acc. to EN 60715

Enclosure material
thermoplastic, red, UL 94 V-0

Place of installation
indoor installation

Degree of protection
IP 20

Capacity
4module(s), DIN 43880

Approvals
KEMA, VDE, UL

Type of remote signalling contact
changeover contact

Switching capacity (a.c.)
250 V / 0.5 A

Switching capacity (d.c.)
250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A

Cross-sectional area for remote signalling terminals
max. 1.5 mm
2
solid / flexible

Extended technical data:
---------------------------------

Voltage protection level [L-PE] (U
P
)
1.5kV

Weight
415g

Customs tariff number (Comb. Nomenclature EU)
85363030

GTIN
4013364108486

PU
1pc(s)

We reserve the right to introduce changes in performance, configuration and technology, dimensions, weights and materials in the course of technical progress. The figures are shown without obligation.