ComPact NSX DC Range

Description

The ComPact NSX DC range covers the following applications:

• Electrical distribution protection

• Photovoltaic (PV) applications

• Marine applications

The ComPact NSX DC range is compliant with the following standards:

• IEC 60947-2 for circuit breakers

• IEC 60947-3 for switch-disconnectors

The ComPact NSX direct current (DC) range consists of:

• Circuit breakers operating on direct current from 16 to 600 A up to 750 Vdc

• Circuit breakers operating on direct current from 630 to 1200 A up to 600 Vdc

• Switch-disconnectors operating on direct current from 16 to 630 A up to 750 Vdc

• Switch-disconnectors operating on direct current from 100 to 630 A up to 1500 Vdc

• A set of standard accessories and auxiliaries shared with the ComPact NSX AC range

• A set of specific accessories to meet the needs of series or parallel connection of poles required in high-voltage DC systems

• Circuit breakers for general-purpose (GP) applications including DC distribution for critical services (for example: Telecom, auxiliaries, and safety services):

  • 1 and 2 poles from 16 to 160 A up to 750 Vdc

  • 3 and 4 poles from 16 to 600 A up to 750 Vdc

  • 2 poles from 630 to 1200 A, obtained from a ComPact NSX 4P 630 A with 2 poles in parallel, up to 600 Vdc

• Circuit breakers for photovoltaic (PV) applications:

  • 4 poles from 16 to 500 A

Convention

In this guide, the term circuit breaker covers circuit breakers and switch-disconnectors.

Fixed Circuit Breaker

A Sealable terminal shields B Interphase barriers C TM-D, TM-G trip unit D BSCM module E Indication contact F Wireless indication auxiliary G Voltage release H Motor mechanism

I Extended rotary handle J Direct rotary handle K Terminal extensions L Rear connectors M Cable connectors N One-piece spreader O Parallel and series connectors P Toggle handle

Withdrawable or Plug-in Circuit Breaker

A Sealable long terminal shields for plug-in base B Interphase barriers C Parallel and series connectors D Automatic withdrawable auxiliary connector E Manual auxiliary connector

F Chassis side plate for withdrawable circuit breaker G Circuit-breaker side plate H Adapter I Power connections J Circuit-breaker plug-in base

K Lugs L Rear connectors M Terminal extensions N Cable connectors O Rear connectors P Adapter

Identification

The faceplate on the front of the circuit breaker identifies the circuit breaker and its characteristics.

A Device size and rated current

B Ui: rated insulation voltage

C Uimp: rated impulse withstand voltage

D Ics: rated service short-circuit breaking capacity

E Icu: rated ultimate short-circuit breaking capacity

F Ue: rated operational voltage

G Circuit breaker disconnector symbol

H Standards

I Performance according to the NEMA standard

NOTE: For extended rotary handles, open the door to view the faceplate label.

Trip Units

The ComPact NSX DC circuit breakers use thermal-magnetic trip units.

For more information about trip units, see the related description.

Trip Unit Settings

The circuit breaker trip unit settings must satisfy the requirements of the performance and installation diagram.

The dial positions on the front of the thermal-magnetic trip unit set the circuit breaker pickup settings.

A Overload protection setting

B Short-circuit protection setting