2. Technical Parameter

SPD Type	DK-20 2P 2 Poles Single Phase 275V AC Power SPD Protector Surge Protection Device
Applicable Power Supply System	TT, TN, IT Power Supply System
Maximum Continuous Operating Voltage Uc	AC 385V
Nominal Discharge Current (8/20µs)	10kA
Maximum Discharge Current (8/20µs)	25kA
Voltage Protection Level Up	≤1.5kV
	≤1.1kV(8/20µs,5kA)
Leakage Current	≤20uA
Respond Time tA	≤25ns
Indication Method	Indication Window, Turn Red When Malfunction
Remote Alarm Function	Optional
Maximum Connection Wire Range	BVR 25mm2
Method of Installation	35mm Din Rail Mounted
Material of Shell	PC
Flame Retardant Rating of Outer Shell	UL94-V0
Protection Level of Outer Shell	IP20
Working Temperature	–25~+70℃
Relative Humidity	≤95%RH

3. Item Number

Item Series	Protection Mode	Installation Location	Dimension(mm)	Item No.
DK-20	L-PE, N-PE(2P)	Low-voltage Single Phase Power Distribution Cabinet	36*91*66mm	DK-20 2P
	L-N-PE(1+1P)			DK-20(1+1)
	L-PE, N-PE(4P)	Low-voltage Three Phase Power Distribution Cabinet	72*91*66mm	DK-20 4P
	L-N-PE(3+1P)			DK-20(3+1)

 

4. Application Scope

 It can be installed in the low voltage power distribution cabinet/box of buildings, to protect all kinds of power equipment in the single (three) phase power distribution system between LPZ1 and LPZ2. Such as:
 1) Low voltage general electricity cabinet and or distribution board of buildings.
 2) Outdoor electricity cabinet/distribution box.
 3) Applicable power supply system: TT, TN, IT.

 

5. External View

 

6. Installation and Caution

  1) DK-20 modular surge protective device(SPD) can be installed in any place of the single phase AC power line, and mostly be installed in power distribution boxes, power switches and sockets. It shall be connected with the power line in parallel, and shall adopt Kevin Connection, so as to lower the residual voltage.
  2) Strip away the surface rubber of input and output terminal, and expose the copper core. Insert the copper core into the hole of the SPD, and make it firm with a screwdriver.
  3) The cross-section of the grounding conductor connected with the module SPD indicating alarm shall be at least 16mm2, and the lead wire of the grounding conductor shall be shorter than 1m, and the shorter the better.