Mains connection box (NAK)

Essential component of the electronic equipment for protection against contact voltages in transportable military function rooms, such as container solutions.

Product description & highlights
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Product description:

The mains connection box (NAK) is an essential component for the electronic equipment of transportable military function rooms such as a container.

  • Available in three power versions: 16 A, 32 A, 63 A

  • For operating temperatures between -46 and +55°C (storage -46 to +70°C)

  • Available in system combination with isolating transformer, also with EMC protection

The main function of the NAK is to protect the operating personnel in the mobile unit from high touch voltages. In addition, the NAK provides protection for connected loads against overvoltages, which can be caused by a lightning strike, for example.

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Painted in standard colors: RAL 6031 (bronze green) or RAL 1039 (sand beige) other RAL colors possible

Cable entry

Technical data:

DesignationMains connection box
Performance16 A32 A63 A
Item number500382750028275003826
Weight13.5 kg13.9 kg14.4 kg
Height353 mm
Length255 mm
Width353 mm
MaterialS235
CoatingLacquered
ColorStandard colors: RAL 6031 (bronze green) or RAL 1039 (sand beige) other RAL colors possible
Protection classIP 65
Cable entryM25M32M40
Protection classII
Environmental condition [shock]MIL-STD-810H: 2019-01, Method 516.8, Procedure II

Environmental condition [vibration]MIL-STD-810H: 2019-01, Method 514.8, Procedure I
Ambient temp. operation-46 - +55
Ambient temp. storage-46 - +70
Mains connection box according toEN 62305-3 :2011 / VG 96907-1 2:2020;03/2020
Electricity16 A32 A63 A
Nominal voltage400 V - 500 V
Rated power11kVA22kVA44kVA
Nominal frequency50/60 Hz
Input current52,5 A17,5 A
Plug coding6h
Number of poles3/555
Input network formTN, TT, IT network
Plug inputEN 60309
Output network formTN, TT, IT network
Protection class II verification and product testedaccording to DIN EN 61439
Lightning protection classC (VG 95374-4) 3 (EN 62305)A/B/C (VG 95374-4) 1/2/3 (EN 62305)A/B/C (VG 95374-4) 1/2/3 (EN 62305)
Discharge capacityN- PE 8/20 µs 100 kA
L- N 8/20 µs 25 kA
Discharge capacityN-PE 10/350 µs 50 kA
L-N 10/350 µs 25 kA

Performance values and dimensions subject to change, slight deviations possible!

Mains inputCEE and 2x wing nut earthing M10
Mains output5.0 m cable 5x16mm² according to customer requirements

Standards met

The following standards were observed in the design of the mains connection box:

  • EN ISO 12100:2011; 03/2011

  • EN 62305-2:2012; 03/2013

  • EN 50274:2002; 11/2002

  • HD 60364-7-717:010

  • HD 60364-5-54:2010

  • A-962-2-NFD

  • VG 96907-1/2:2020;03/2020

  • DIN EN 60529:2014; 09/2014

  • DIN EN 61439-1:2012; 06/2012

  • DIN EN 61000-1/2:2017;07/2017

  • MIL-STD-810H: 2019-01, Method 516.8, Procedure II

  • MIL-STD-810H: 2019-01, Method 514.8, Procedure I

Possible options

The following options can be equipped:

  • EMC insertion loss of 60dB against conducted interference from 10 kHz to 1 GHz

  • EMC shielded with a shielding attenuation of 60 dB against radiated interference from 10 kHz to 1 GHz

  • Elimination of the shielding attenuation properties

  • Rear cable outlet

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Contact us if you have any questions or are interested

Thorsten Kutz, Head of Sales

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