N3-4-320-S1-DC
127734 N3-4-320-S1-DC
127734

Switch-disconnector 4p 320A 1000VDC
Switch-disconnectors N..DC in the special version for up to 1500 V DC can be used on 1- or 2 poles. The comply with the isolation properties even for earthed IT networks. Accessories, such as bridge kits, connection terminals and door coupling rotary handles enable individual installation in the most varied of distribution systems. Auxiliary switches, voltage releases and remote operators facilitate signaling and automation. Notes: main switch characteristics including positive drive according to IEC/EN 60204 und VDE 0113. Isolating characteristics according to IEC/EN 60947-3 and VDE 0660. Terminal type: a series connection is required for 2 pole switching according to the specified connecting possibilities. See accessories bridge kits. Switch can not be combined with plug-in / withdrawable units and / or connection on rear.

Product range	Switch-disconnectors
Protective function	Disconnectors/main switches Photovoltaic applications
Product range	DC switch-disconnectors
Application field	Utility buildings Open areas
Part no.	N...DC
Standard/Approval	IEC
Rated operational voltage	1000
Installation type	Fixed
Construction size	N3
Description	IEC/EN 60947-3 CCC China Compulsory Certificate Main switch characteristics including positive drive to IEC/EN 60204 and VDE 0113. Isolating characteristics to IEC/EN 60947-3 and VDE 0660. N switch-disconnectors can, in addition, be combined with NZM...-XU, NZM...-XA shunt releases and auxiliary contacts as well as with NZM...-XR... remote operator. For DC switching, all 4 contacts must be connected in series. Refer to the information on jumper kit accessories. Supplied as standard: Screw connection; box terminal optional. When working with ungrounded systems (e.g., IT), the installation must ensure that a double ground fault will be impossible. Switch can not be combined with plug-in/withdrawable units and/or connection on rear. N4-4-...-S15-DC feeder unit and outgoer from the bottom only.
Connection options
Number of poles	4-pole basic device, usable in a 1-pole or 2-pole configuration depending on the type of connection
Standard equipment	Screw connection
Switch positions	I, +, 0
Rated current = rated uninterrupted current [In = Iu]	320 A
Short-circuit protective device max. fuse gR-characteristic	2 x 250 A gR
Remotely control / trip	Remote operation with shunt releases / remote operator
Rated operating frequency	DC
Rated operational voltage, max. [Ue]	1000 V DC
Rated uninterrupted current with terminal jumpers >at 40°	320
Rated uninterrupted current with terminal jumpers >at 65°	320
Rated uninterrupted current with terminal jumpers	Values for rated uninterrupted current at 65 °C include jumpers.
Utilization category	DC-22A
Rated operational current [Ie ] >DC 22-A [Ie]	320 A
Overvoltage category/pollution degree	III/3
Rated insulation voltage [Ui ]	1250 V
Ambient temperature >Ambient temperature, storage	- 40 - + 70 °C
Ambient temperature >Operation	-25 - +70 °C
t = 1 s [Icw ]	6.6 kA
1000 V	15 kA
With back-up fuse	2 x 250 A gR
Max. operating frequency	60 Ops/h
Lifespan, mechanical [Operations]	15000
Standard equipment	Lifespan, mechanical: of which max. 50 % trip by shunt/undervoltage release
Round copper conductor >Box terminal >Solid	Screw connection
Round copper conductor >Box terminal >Stranded	2 x 16 mm2
Round copper conductor >Tunnel terminal >Stranded >Stranded	1 x (35 - 240) 2 x (25 - 120) mm2
Round copper conductor >Tunnel terminal >Stranded >Double hole	1 x (25 - 185) mm2
Round copper conductor >Bolt terminals >Direct on the switch >Solid	1 x (50 - 240) 2 x (50 - 240) mm2
Round copper conductor >Bolt terminals >Direct on the switch >Stranded	1 x 16 2 x 16 mm2
Al conductors, Cu cable >Tunnel terminal >Solid	1 x (25 - 240) 2 x (25 - 240) mm2
Al conductors, Cu cable >Tunnel terminal >Stranded >Stranded	1 x 16 mm2
Al conductors, Cu cable >Tunnel terminal >Stranded >Double hole	1 x (25 - 185) mm2
Al conductors, Cu cable >Bolt terminal and rear-side connection >Flat copper strip, with holes [min.]	1 x (50 - 240) 2 x (50 - 240) mm2
Al conductors, Cu cable >Bolt terminal and rear-side connection >Flat copper strip, with holes [max.]	6 x 16 x 0.8 mm
Al conductors, Cu cable >Bolt terminal and rear-side connection >Connection width extension	10 x 32 x 1.0 + 5 x 32 x 1.0 mm
Cu strip (number of segments x width x segment thickness) >Box terminal [min.]	(2x) 10 x 50 x 1,0 mm
Cu strip (number of segments x width x segment thickness) >Box terminal [max.]	6 x 16 x 0,8 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Flat copper strip, with holes [min.]	10 x 24 x 1,0 + 5 x 24 x 1,0 (2x) 8 x 24 x 1,0 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Flat copper strip, with holes [max.]	6 x 16 x 0.8 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Connection width extension	10 x 32 x 1.0 + 5 x 32 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Screw connection	(2x) 10 x 50 x 1,0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [min.]	M10
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [max.]	20 x 5 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Connection width extension >Connection width extension [max.]	30 x 10 + 30 x 5 mm
Rated operational current for specified heat dissipation [In]	2 x (10 x 50) mm
Equipment heat dissipation, current-dependent [Pvid]	320 A
Operating ambient temperature min.	62 W
Operating ambient temperature max.	-25 °C
10.2 Strength of materials and parts >10.2.2 Corrosion resistance	+70 °C
10.2 Strength of materials and parts >10.2.3.1 Verification of thermal stability of enclosures	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.3.2 Verification of resistance of insulating materials to normal heat	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.3.3 Verification of resistance of insulating materials to abnormal heat and fire due to internal electric effects	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.4 Resistance to ultra-violet (UV) radiation	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.5 Lifting	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.6 Mechanical impact	Does not apply, since the entire switchgear needs to be evaluated.
10.2 Strength of materials and parts >10.2.7 Inscriptions	Does not apply, since the entire switchgear needs to be evaluated.
10.3 Degree of protection of ASSEMBLIES	Meets the product standard´s requirements.
10.4 Clearances and creepage distances	Does not apply, since the entire switchgear needs to be evaluated.
10.5 Protection against electric shock	Meets the product standard´s requirements.
10.6 Incorporation of switching devices and components	Does not apply, since the entire switchgear needs to be evaluated.
10.7 Internal electrical circuits and connections	Does not apply, since the entire switchgear needs to be evaluated.
10.8 Connections for external conductors	Is the panel builder´s responsibility.
10.9 Insulation properties >10.9.2 Power-frequency electric strength	Is the panel builder´s responsibility.
10.9 Insulation properties >10.9.3 Impulse withstand voltage	Is the panel builder´s responsibility.
10.9 Insulation properties >10.9.4 Testing of enclosures made of insulating material	Is the panel builder´s responsibility.
10.10 Temperature rise	Is the panel builder´s responsibility.
10.11 Short-circuit rating	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.12 Electromagnetic compatibility	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
10.13 Mechanical function	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Version as main switch	The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
Version as maintenance-/service switch	Yes
Version as safety switch	Yes
Version as emergency stop installation	No
Version as reversing switch	Yes
Number of switches	No
Max. rated operation voltage Ue AC	1
Rated operating voltage	0 V
Rated permanent current Iu	1000 - 1000 V
Rated permanent current at AC-23, 400 V	320 A
Rated permanent current at AC-21, 400 V	0 A
Rated operation power at AC-3, 400 V	0 A
Rated short-time withstand current lcw	0 kW
Rated operation power at AC-23, 400 V	6.6 kA
Switching power at 400 V	0 kW
Conditioned rated short-circuit current Iq	0 kW
Number of poles	0 kA
Number of auxiliary contacts as normally closed contact	4
Number of auxiliary contacts as normally open contact	0
Number of auxiliary contacts as change-over contact	0
Motor drive optional	0
Motor drive integrated	Yes
Voltage release optional	No
Device construction	Yes
Suitable for ground mounting	Built-in device fixed built-in technique
Suitable for front mounting 4-hole	Yes
Suitable for front mounting centre	No
Suitable for distribution board installation	No
Suitable for intermediate mounting	Yes
Colour control element	Yes
Type of control element	Black
Interlockable	Rocker lever
Type of electrical connection of main circuit	Yes
Degree of protection (IP), front side	Screw connection
Degree of protection (NEMA)	IP20

As Mnelko, we are a reliable partner in industrial automation solutions, offering high-quality and innovative products with a wide product range to meet all the needs of your business. Our product portfolio consists of solutions designed based on the principles of high performance, durability, and efficiency to support modern industrial processes.
All of our products ensure maximum reliability even in challenging working conditions and help your business operations run smoothly. The products we offer in industrial automation, energy management, cabling solutions, and many other areas adapt flexibly to the needs of different sectors.
Additionally, our products are manufactured using only high-quality materials and comply with international standards. Through the solutions we provide, we enable our customers to increase operational efficiency and optimize costs. Our company closely follows technological advancements and continuously offers innovative products to help our customers gain a competitive advantage.
On each of our product pages, you can find comprehensive information about technical details, areas of use, and product features. You can explore all the products you need to strengthen your industrial processes on our website and enjoy a seamless purchasing experience.