Eaton NZMH3-A320-BT Molded-Case Circuit Breaker 3-Pole 320A 150KA

Eaton NZM3 molded-case circuit breaker, type NZMH3-A320-BT. 3-pole, rated current 320 A, breaking-capacity class H, frame size NZM3 (up to 630 A). Rated operational voltage 690 V AC; rated ultimate short-circuit breaking capacity (Icu) 150 kA at 400/415 V AC to IEC/EN 60947-2. Thermomagnetic release — adjustable thermal overload and electromagnetic short-circuit protection. Box terminals. Utilization category A, suitable for isolation.

Manufacturer part number (MPN)

NZMH3-A320-BT

Series

Eaton NZM3 (Moeller series NZM)

Type

Molded-case circuit breaker (MCCB)

Breaking-capacity class

H (high breaking capacity)

Number of poles

3-Pole

Rated current (In)

320 A

Frame size

NZM3 (up to 630 A)

Rated operational voltage (Ue)

690 V AC

Rated insulation voltage (Ui)

800 V

Rated ultimate short-circuit breaking capacity (Icu) at 400/415 V AC

150 kA

Trip unit / release

Thermomagnetic release — adjustable thermal overload and electromagnetic short-circuit protection

Utilization category

A

Suitable for isolation

Yes

Standard

IEC/EN 60947-2

Configuration

Box terminals

EAN / GTIN

4015081098538

HS code

8536.20

Sales unit

pcs

Eaton catalogue number

110305

Depth

166 mm

Height

275 mm

Width

140 mm

Weight

6.067 kg

Compliances

RoHS conform

Certifications

IEC/EN 60947; IEC

Functions

System and cable protection

Amperage Rating

320 A

Application

Use in unearthed supply systems at 690 V

Circuit breaker frame type

NZM3

Features

Protection unit; Motor drive optional

Release system

Thermomagnetic release

Ambient operating temperature - max

70 °C

Ambient storage temperature - max

70 °C

Ambient operating temperature - min

-25 °C

Equipment heat dissipation, current-dependent

78.64 W

Rated operational current for specified heat dissipation (In)

320 A

Direction of incoming supply

As required

Electrical connection type of main circuit

Frame clamp

Handle type

Rocker lever

Instantaneous current setting (Ii) - max

3200 A

Instantaneous current setting (Ii) - min

1920 A

Isolation

500 V AC (between auxiliary contacts and main contacts); 300 V AC (between the auxiliary contacts)

Number of operations per hour - max

60

Overload current setting (Ir) - max

320 A

Overload current setting (Ir) - min

250 A

Overvoltage category

III

Pollution degree

3

Rated impulse withstand voltage (Uimp) at auxiliary contacts

6000 V

Rated impulse withstand voltage (Uimp) at main contacts

8000 V

Rated short-circuit breaking capacity Ics (IEC/EN 60947) at 500 V DC

70 kA

Rated short-circuit breaking capacity Ics (IEC/EN 60947) at 750 V DC

70 kA

Rated short-circuit making capacity Icm at 240 V

50/60 Hz

330 kA

Rated short-circuit making capacity Icm at 400/415 V

Rated short-circuit making capacity Icm at 440 V

50/60 Hz

286 kA

Rated short-circuit making capacity Icm at 525 V

50/60 Hz

143 kA

Rated short-circuit making capacity Icm at 690 V

50/60 Hz

74 kA

Rated short-time withstand current (t = 0.3 s)

3.3 kA

Rated short-time withstand current (t = 1 s)

3.3 kA

Short-circuit release non-delayed setting - max

3200 A

Short-circuit release non-delayed setting - min

1920 A

Short-circuit total breaktime

< 10 ms

Voltage rating

690 V - 690 V

Voltage rating (DC)

750 VDC

Climatic proofing

Damp heat, cyclic, to IEC 60068-2-30; Damp heat, constant, to IEC 60068-2-78

Degree of protection

IP20; IP20 (basic degree of protection, in the operating controls area)

Degree of protection (IP), front side

IP40 (with insulating surround); IP66 (with door coupling rotary handle)

Degree of protection (terminations)

IP10 (tunnel terminal); IP00 (terminations, phase insulator and strip terminal)

Lifespan, mechanical

15000 operations

Mounting Method

Fixed; Built-in device fixed built-in technique

Number of auxiliary contacts (change-over contacts)

0

Number of auxiliary contacts (normally closed contacts)

0

Number of auxiliary contacts (normally open contacts)

0

Position of connection for main current circuit

Front side

Protection against direct contact

Finger and back-of-hand proof to DIN EN 50274/VDE 0106 part 110

Shock resistance

20 g (half-sinusoidal shock 20 ms)

Optional terminals

Connection on rear. Screw terminal. Tunnel terminal

Standard terminals

Box terminal

Terminal capacity (aluminum solid conductor/cable)

16 mm² (1x) at tunnel terminal

Terminal capacity (aluminum stranded conductor/cable)

50 mm² - 240 mm² (2x) at 2-hole tunnel terminal; 50 mm² - 240 mm² (1x) at 2-hole tunnel terminal; 25 mm² - 185 mm² (1x) at tunnel terminal

Terminal capacity (control cable)

0.75 mm² - 2.5 mm² (1x); 0.75 mm² - 1.5 mm² (2x)

Terminal capacity (copper busbar)

Max. 10 mm x 50 mm (2x) at rear-side width extension; Max. 30 mm x 10 mm + 30 mm x 5 mm direct at switch rear-side connection; M10 at rear-side screw connection; Min. 20 mm x 5 mm direct at switch rear-side connection

Terminal capacity (copper solid conductor/cable)

300 mm² (2x) at rear-side width extension; 16 mm² (1x) at tunnel terminal; 16 mm² (1x) direct at switch rear-side connection; 16 mm² (2x) at box terminal; 16 mm² (2x) direct at switch rear-side connection

Terminal capacity (copper stranded conductor/cable)

35 mm² - 240 mm² (1x) at box terminal; 16 mm² - 185 mm² (1x) at 1-hole tunnel terminal; 25 mm² - 240 mm² (1x) direct at switch rear-side connection; 25 mm² - 120 mm² (2x) at box terminal; 25 mm² - 240 mm² (2x) direct at switch rear-side connection

Standard

Eaton NZM

HS Code

8536.20

• EAN 4015081098538
• SAP 1200600914
• Code 82981025