DF-2+ (Arc-Killer)

DF-2+ option with integrated Arc-Killer SV-25

Protect your cubicles, and in particular your staff and buildings against the negative consequences of an internal arc. The integrated Arc-Killer extinguishes an arc in less than 50 ms.

The DF-2+ is equipped with the Arc-Killer SV25, which detects an internal arc and extinguishes it. The Arc-Killer extinguishes the arc by guiding it to a metallic grounded short circuit. The arc is extinguishes in less than 50 ms.

KEMA tested according IAC: B, FLR 20 kA 1 s. This solution is patented.

The DF-2+ is a metal enclosed equipment of the type DF-2, combined with a gas exhaust duct on the rear side of the cubicle. This duct absorbs the gases (in the case of an internal arc) that escapes through the arc venting shields. It reduces the expansion of the gases in the room to a negligible minimum. The cubicles of the DF-2+ range offers a protection against the internal arc classification IAC category B, FLR 20 kA 1s (F= frontal, L= lateral, R=rear)

Thus the operator is protected from the negative consequences of an internal arc, wherever het stays in the front, on the side or on the rear of the cubicle.

The patented SV-25 Arc-Killer of SGC nv SwitchGear Company is going further in the field of safety. Not only the surrounding and the operator are fully protected, but thanks to the rapid extinguishing of the arc, the cubicles, in case of a fault, can be quickly put back into operation. Moreover, the additional security means that the requirements to the installation room are less stringent. The Arc-Killer combines security and reliability with flexibility to the installation room requirements.

Technical specifications

Rated voltage kV 12 17,5
Impulse withstand voltage 1.2 / 50 µs
– to earth and between phases kV 75 95
– over the insulation distance kV 85 110
Power frequency withstand voltage
– to earth and between phases kV 28 38
– over the insulation distance kV 32 45
Nominale frequentie Hz 50/60 50/60
Rated frequency A 800/1250* 800/1250*
Rated short time current 1s. kA 25 25
Peak value of the short time current kA 63 63
Breaking capacity RV44 (IEC 62271-103)
– active load A 800/1250 800/1250
– closed loop A 800/1250 800/1250
– cable charging current A 18 18
– making capacity kA 63 63
– earth fault A 100 100
– earth fault cable and line charging current A 30 30
– internal arc 1 sec. (6 criteria’s) kA 20 20
Degree of protection IP4X
Mechanical endurance c/o 1000
Standards IEC 62271-100, IEC 62271-1, 62271-102,-103, -105, 62271-200 and IEC 61243-5
Certificates KEMA/IPH
* According IEC 62271-103, Class E1
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