CHINT/CHINT Terminal Appliances —NXU-II. Surge Protective Devices

CHINT/CHINT Terminal Appliances —NXU-II. Surge Protector Main functions: lightning protection and surge protection in the inlet cabinet

CHINT/CHINT Terminal Appliances —NXU-II. Surge Protective Devices

Conform to the standard: GB/T18802.1

Basic parameters and technical performance indicators (Table 1)

Technical parameters item	Parameter value
Maximum discharge current lmax (kA)	20、40、 65、100
Maximum continuous operating voltage Uc (V~)	255、275、 320、 385、 440
Nominal Discharge Current In (kA)	10、20、30、40
Voltage Protection Level Up (kV)	1.2、 1.5、 1.6、 1.8、1.9、 2.0、2.2
Number of poles	1P、2P、3P、 4P、1P+N、 3P+N
Connecting wire (mm2)	≤16
Tightening torque(Nm)	2
Ingress protection	IP20
Dimensions	See Figure 2~Figure 5.
Back-up protection fuse	See Table 3

Choose the appropriate specifications according to different grounding systems and protection modes.

NXU-Ⅱ	L-PE/N-PE protection mode Uc=275V, 320V		1P, 3P	2P, 4P		Not suitable for inductive loads
	L-PE/N-PE protection mode Uc=385V, 440V	2P, 4P	1P, 3P	2P, 4P	3P（440V）
	L-N/N-PE protection mode bUc=255V, 275V, 320V, 385V, 440V	1P+N 3P+ N		1P +N 3P+ N		It is recommended to use 440V for inductive load

°L-PE/N-PE protection mode: phase to ground and neutral to ground protection.

b L-N/N-PE protection mode: protection between phase to neutral and neutral to ground.

Choice of back-up fuse

Surge protective device models	Maximum discharge current (kA)	Back-up fuse
Surge protective device models	Maximum discharge current (kA)	Rated current(A)	Breaking range
NXU-II	20	63	gL/gG
	40	125	gL/gG
	65	160	gL/gG
	100	250	gL/gG

SPECIAL FEATURES:

a. The NXU-I surge protective device consists of two parts, the sequence 4 protection module and the sequence 2 base, and its structure is independent of each other and can be plugged and unplugged, as shown in Figure 1.

b. The NXU-I surge protective device has a deterioration indication, as shown in sequence 3 in the figure, and after the product deteriorates, it pops up sequence 4 to warn the surface of the protection module. At this point, the sequence 4 protection module should be replaced immediately without disconnecting the wiring or rewiring.

C. Sequence 1 is the maximum continuous working voltage indication device of the surge protector, which can also prevent the insertion of the wrong specification module when replacing the module. The index value of its cardioid sharp angle is the maximum continuous operating voltage of the product.

This article introduces the CHINT/CHINT terminal electrical appliance —NXU-II. surge protective device products interested, also contact our customer service, we look forward to your call, hope our technology and service can bring you a better experience.

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CHINT/CHINT Terminal Appliances —NXU-II. Surge Protective Devices

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