Description

EATON MCCB  NZMH2-A20-S1

Eaton MCCB NZM (Digital NZM Moulded Case Circuit Breaker)

Circuit-breaker, 3p, 20A 1000V 

Part no.

NZMH2-A20-S1

Delivery program

Product range	Circuit-breaker
Protective function	System and cable protection
Standard/Approval	IEC
Installation type	Fixed
Release system	Thermomagnetic release
Construction size	NZM2
Description	NZM…S1 terminal type: NZM…XKSA cover required
Number of poles	3 pole
Standard equipment	Screw connection
Rated current = rated uninterrupted current	In = Iu	A	20
Switching capacity
1000 V 50/60 Hz	Icu	kA	10
Setting range
Overload trip
Ir	A	15 – 20
Short-circuit releases
Non-delayed	Ii = In x …	350 A fixed

Technical data:-

Circuit-breakers

Rated surge voltage invariability	Uimp
Main contacts	V	8000
Auxiliary contacts	V	6000
Rated operational voltage	Ue	V AC	1000
Rated current = rated uninterrupted current	In = Iu	A	20
Overvoltage category/pollution degree	III/3
Rated insulation voltage	Ui	V	1000
Utilization category	A
Ambient temperature
Ambient temperature, storage	°C	– 40 – + 70
Operation	°C	-25 – +70

Rated short-circuit making capacity

240 V 50/60 Hz	Icm	kA	330
400/415 V 50/60 Hz	Icm	kA	330
440 V 50/60 Hz	Icm	kA	286
525 V 50/60 Hz	Icm	kA	105
690 V 50/60 H	Ic	kA	40
1000 V 50/60 Hz	Icm	kA	17

Rated short-time withstand current

 

t = 0.3 s	Icw	kA	1.9
t = 1 s	Icw	kA	1.9
Lifespan, mechanical	Operations	20000
Max. operating frequency	Ops/h	120
Lifespan, mechanical: of which max

Lifespan, electrical

1000 V 50/60 Hz

Operations

3000

Terminal capacity

Standard equipment	Screw connection
Round copper conductor
Box terminal
Solid	mm2	1 x (10 – 16)  2 x (6-16)
Stranded	mm2	1 x (25 – 185)  2 x (25-70)
Tunnel terminal
Solid	mm2	1 x 16
Stranded
Stranded	mm2	1 x (25 – 185)
Bolt terminal and rear-side connection
Direct on the switch
Solid	mm2	1 x (10 – 16)  2 x (10 – 16)
Stranded	mm2	1 x (25 – 50)  2 x (25 – 50)
Al conductors, Cu cable
Tunnel terminal
Solid	mm2	1 x 16
Stranded
Stranded	mm2	1 x (25 – 185) 2)
2) Up to 240 mm² can be connected
Cu strip (number of segments x width x segment thickness)
Box terminal
min.	mm	2 x 9 x 0.8
max.	mm	10 x 16 x 0.8  (2x) 8 x 15.5 x 0,8
Bolt terminal and rear-side connection
Flat copper strip, with holes	min.	mm	2 x 16 x 0.8
Flat copper strip, with holes	max.	mm	10 x 16 x 0.8
Copper busbar (width x thickness)	mm

Bolt terminal and rear-side connection
Screw connection	M8
Direct on the switch
min.	mm	16 x 5
max.	mm	24 x 8
Control cables
mm2	1 x (0.75 – 2.5)  2 x (0.75 – 1.5)

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