NXU- III Series Surge Protector

Product category:: Surge Protective Device (SPD)
Product code:: P-387
Model:

Function & Use (Application Scenarios)

End devices, surge protection devices are mainly applicable to 1 in accordance with the standard GB/T 18802.11, suitable for engineering support, installation and maintenance, and long-term stable operation, meeting the on-site application requirements of the electrical system.

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Product highlights

Engineering Application Compatibility
Stable and reliable operation
Easy system integration

Model

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Main Product Parameters

CategorySwitchgearSecondary CategorySurge protector

Product details

Function and Usage

1 Complies with standard GB/T 18802.11

Detailed Parameters

Parameter Category	Parameter Item	Parameter Value
Technical Parameter Item	Test Category	Class III
	Open Circuit Voltage Uoc(kV)	10
	Short Circuit Current Isc(kA)	5
	Maximum Continuous Operating Voltage Uc(V~)	255, 275, 320, 385
	Voltage Protection Level Up(kV)	1.5
	Poles	1P+N, 2P
	Connection Wire(mm²)	≤16(M4), ≤25(M5)
	Tightening Torque(N·m)	1.5(M4), 2.0(M5)
	Protection Level	IP20
	Outline Dimensions	See Figure 2, Figure 3
	Back-up Protective Fuse	NB1-63 C10
	Short Circuit Current Withstand Capability(kA)	3
	Transient Overvoltage (TOV) Characteristics	Low voltage TOV, withstand mode (U1=336V, t1=5s), fault mode (U1=442V, t1=120min); high voltage TOV not applicable
	Communication and Indication	Communication function can be selected as needed, indication function see product window
	Working Status/Fault Indication	Green (communication terminal 11→14 normally open, 11→12 normally closed)/Red (communication terminal 11→14 normally closed, 11→12 normally open)
	Communication Terminal Wiring Capacity	Maximum 1.5mm²
	Communication Contact Switching Capacity	250V/0.5A; 75V/0.5A
Open Circuit Voltage (1,2/50μs)(kV)	Maximum Continuous Operating Voltage Uc(V~)	Design Type and Pole Configuration
10	320	Composite Type 2P
	385
10	255	Composite Type 1P+N
	275
Earthing System	TN	Notes
Maximum Grid Operating Voltage Us,max	253V	Refer to IEC 60364-5-534
NXU-III	L-PEN/PE Protection Mode* Uc=320V, 385V	2P
	L-N/N-PE Protection Mode* Uc=255V, 275V	1P+N

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