Understanding Masterpact NT

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Understanding Masterpact NT NW
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• NW breaker frame
• Micrologic socket
• Auxiliaries and accessories
• Drawout installation
• Fixed Installation
• Range and performances

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ContentsNW breaker frame

• Case
• Moving contact
• Current transformers
• Power supply
• Fixed contact
• Assembly
• Arc chamber
• Opening of contacts

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Case

• Supports the opening /closing mechanism
• stored energy mechanism (OCO sequence )
• Insulated organic polymer material
• Fire proof
• No halogen

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Moving contact

• Complete assembly
• fingers, braids, terminal
• no internal bolted joint
• High electromechanical and thermal withstand
• blow on
• Specific limiter contact assembly
• L1 performance
• Direct link to the OCO mechanism
• Isolated compartments

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Current transformers

• Combined technology
• air core for measurement (Rogowsky)
• measurement precision 1
• linearity from 40A to 400kA
• self powered
• iron core for trip unit power
• Integral connector
• automatically connected
• One CT per pole
• Mounted on bottom side of moving contact

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Micrologic trip unit power supply
Circuit breaker
Communication module
Micrologic
COM Module
Microprocesseur
ASIC
Additionals functions (measurement, analyses...)
Basic protection
Optical coupling
Air CT
Isolation
Power supply
Trip unit power supply
Iron CT
BUS power supply

• Optional external 24V DC power supply for
• programmable contact power supply,
• when breaker is open
• Powers display,
• Identification, adjustments through Com module

Standard Internal voltage sensor or optional
external voltage sensor for µP power supply and
measurement
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Fixed Contact

• Breaking the arc
• arcing contact protects main contacts against
  wear
• high number of electrical operation
• increased life expectation
• Top terminal
• no internal joint

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Assembly

• Reliability
• reduced number of components
• simple concept
• compact
• modular
• Three cases (3x3P 3x4P)
• NT06 - 16
• NW 08 - 40
• NW 40b - 63

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Arc chamber
NT
NW

• Increased arc impedance favors extinguishing
  properties
• patented metallic filter
• high porosity
• energy and gas absorption results in
  de-ionization of external gas
• Reduced external projections
• Reduced enclosure pressure
• Safety clearance above arc chamber
• NW not required
• NT D/O no, Fixed reduced
• Removable for contact inspection

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Opening of contacts

• Commutation principle
• Contact pads protected from the electric arc for
  better performance

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ContentsMicrologic socket

• Mitop trip solenoid
• Making current release (DINF)
• NW Interface
• Trip alarm contact
• Remote reset
• 2 contacts module
• Communication module

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Mitop trip solenoid
NW

• Transforms the trip command into a mechanical
  operation to open the breaker
• Activate the alarm contact (SDE)

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Making current release (DINF)
NW

• Self protection of the breaker when closing on
  very high fault current
• Standard on all NT and NW breakers

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NW Interface
NW

• Accessory fixture
• Trip alarm contact SDE 1
• communication module
• Auto trip controller
• Missing trip unit
• security feature
• identical on NT

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Alarm trip contactSDE
NT
NW

• Trip signalisation on electrical fault (Mitop
  command)
• Standard changeover contact 10A 240V on all NT
  and NW breakers
• Optional second alarm trip contact SDE 2
• standard or low level

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Remote reset
NT
NW

• Remote reset of a tripped breaker
• automatic reset of the mechanical indicator
• 2 voltages
• 110 / 130 V AC
• 200 / 240 V AC
• Exclusive with the second SDE

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2 contacts module M2C
NT
NW

• programmable contacts
• to energize bell or visual alarms
• to shed and reconnect non priority circuits
• 2 closing contacts10 A 240V AC
• Monitored by Micrologic P et H
• M6C 6 programmable contacts in external DIN
  case

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Communication module
NT

• Independent modules
• Breaker module
• data transmission
• threshold adjustment
• breaker status
• breaker monitoring
• breaker identification
• wave form capture
• readings of histories logs
• Chassis module
• transmission of  connected, test, disconnected 
  positions

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ContentsAuxiliaries and accessories

• Electrical operating mechanism
• Voltage releases
• Auxiliaries connection block support
•  OF  auxiliary switches
•  Ready to close  contact
• Locking accessories and BPFE
• Control unit
• Operation counter
• Front cover

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Electrical operating mechanism MCH
NT
NW

• Charges and automatically recharges the
  stored-energy spring upon breaker closing
• AC
• 50 / 60 Hz
• 100V to 480V CA
• 7 references
• DC
• 24V to 250V
• 4 references
• Charging time 4 s maxi
• Easy installation 1 screw
• Local and remote signalisation of  spring
  charged 
• mechanical indicator charged
• Changeover contact 10A 240V

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Voltage releases
NT
NW

• Closing (XF) opening (MX) coils
• AC 50/ 60 Hz
• from 12V to 525V
• 8 references
• Com compatible 12 to 480V
• DC
• from 24V to 250 V
• 4 references
• Security opening coils MN and MNR
• AC 50/ 60 Hz
• from 24 to 525V
• 7 references
• DC
• from 24V to 250 V
• 5 references

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NW Auxiliaries connection block support
NW

• Allows the fixation of auxiliary connectors
• MN or MX2
• MX1
• XF
• PF
• MCH
• Supports the  OF  changeover switch block

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OF auxiliary switches
NT
NW

• NW
• standard block of 4 OF contacts
• optional 2 additional blocks
• changeover contact 10A 480V low level compatible
• simplified mounting 2 screws
• rotative contacts directly operated by mechanism
  
• NT
• standard 4 OF contacts
• identical to Compact NS
• changeover switch 6A 480V
• optional low level contact 5A 480V
• clip on type

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Ready to close contact PF
NT

• Changeover contact 10A 240V
• Indicates
• the breaker is open
• the stored energy mechanism is charged
• the mechanism is correctly reset
• the breaker opening push button is not locked
• no opening order is present

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Installation ofMicrologic socket
NW

• Left side
• The socket supports
• communication module
• Micrologic control unit

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 open  position breaker locking
NT
NW

• NW
• key locking 1 or 2 locks
• padlocking up to 3 padlocks
• electrical closing pushbutton (BPFE) available on
  support
• NT
• key locking 1lock
• padlocking up to 3 padlocks
• Locks
• Ronis, Profalux, Castel

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Micrologiccontrol units

• 4 protection levels
• LI, LSI, LSIG, LSIV
• Combined with 3 measurement levels
• A current
• P A voltage power energy
• H P energy quality management (harmonics)
• Available functions
• monitoring and protection
• measure
• network monitoring
• maintenance help

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Micrologiccontrol units
NT
NW

• Common to all NT and NW breakers
• CT rating / performance socket
• breaker rating
• breaking capacity (N1, H1, H2, H3, L1)
• Circuit breaker is maintained in open position
  when control unit is missing
• Interchangeable on site

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secondary wiring support control unit and
 com  module
NW
NT

• NW
• Communication
• ZSI
• External neutral
• Earth leakage protection (vigi)
• Control unit external 24V voltage supply
• External voltage (phases and neutral)
• Programmable contacts M2C or M6C
• NT
• identical except external voltage exclusive
  with M2C/M6C

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Operation counter
NW

• Sums the number of operating cycles (closing
  /opening)
• maintenance help
• Easy installation
• Visible on the front panel

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Front cover
NT
NW

• Front cover installed provides double insulation
• IP 20 finger safe
• Attractive design

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ContentsDrawout installation

• Drawout accessories
• Chassis
• Auxiliaries terminals
• Extracting the rail
• Racking sequence
• Primary connectors

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Masterpact NTLateral side panels
NT

• Supports breaker on rails
• Carrying handles
• Easy installation with 4 screws

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Drawout connectors
NT
NW

• Connection between beaker and chassis
• Connectors
• Vertically oriented for optimal heat dissipation

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Chassis

• Back mold
• Clusters
• Shutters
• Positions
• Secondary terminals
• Breaker installation

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Back mold
NW

• Support interface
• primary clusters
• customer bus connection point
• Location of the shutters

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Chassis assembly
NT
NW

• Arc chute cover installed as standard
• 2 sizes of chassis
• 800 A - 4000 A
• 4000 A - 6300 A
• 2 variants
• 3P
• 4P

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Clusters
NT
NW

• One fits all !
• Vertical orientation for better heat dissipation
• 10 fingers on each cluster across the entire
  range
• Clip on type
• Number of clusters depends on breaker frame size

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Shutters actuator
NW

• Reversible
• upper and lower
• Quick installation
• Controlled by rear of breaker

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Safety shutter installation
NW
NT

• Safety shutters  up  and  down  identical
  but independent
• Shutter locking
• NW
• in front of the chassis
• on the primary stabs
• NT
• on the primary stabs only

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Chassis position contactsConnected - test -
disconnected
NW
NT

• NW
• 3 changeover contacts 10A 240V for each position
• activated by actuators
• Possible to replace the test and disconnected
  actuator by the connected actuator to get 9 CE
  contacts
• NT
• 3 CE, 2 CD, 1 CT
• Combined connected/closed  contacts (EF)

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Auxiliaries terminals
NT
NW

• 2 wires from 0,75 to 2,5mm²
• Predefined position
• Simple identification
• Quick connection
• Easy installation

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Auxiliaries cover
NT
NW

• Protection of auxiliary wires
• Easy identification by tampoprinting
• Quick mounting with 2 screws

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Extracting the rails and installing the breaker
NT
NW

• Interlock must be defeated before removing
  breaker
• Provides guide for breaker
• Breaker slides in manually to disconnected
  position

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Racking sequencewith crank handle
NT
NW

• Safety
• Automatically opens breaker before connecting or
  disconnecting
• mechanical stop in all positions
• Push button for releasing each mechanical stop

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Primary connectors

• Connector options
• Rear connectors
• Mixed connectors
• Front connectors

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NW connector options
NW

• Rear connectors
• NW 08- 32 NW40b- 50
• Al (800 - 2000)
• Cu (2500 - 5000)
• vertical or horizontal
• NW 40 NW 63
• specific rear connectors
• Front connectors
• Al (800 - 1600)
• Cu (2000 - 3200)
• thickness 20 mm for all connectors
• identical top and bottom connector

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NT connector options
NT

• Rear connectors
• NT 06 - 16
• copper 15 mm
• identical for fixed and drawout
• Front connectors
• long connector on top
• short connector on bottom side
• copper 15 mm
• Options for front or rear connectors
• Spreaders
• pole pitch 95 mm
• edgewise terminal extension
• additional connectors ( eg for cripmled lugs)
• identical for fixed and drawout

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Primary connectionVertical / horizontal rear
NT
NW

• Connectors matched to breaker size
• NT 06 - 16
• NW 08 - 32
• NW 40b - 63
• pole pitch 70, 115, 230 mm
• Specific rear connectors for NW40
• Pole pitch
• 150 mm horizontal
• 115 mm vertical
• identical for fixed and drawout

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Primary connectionmixed
NT
NW

• Without modification of the breaker depth, the
  primary connectors may be rotated
• Mixed connectors
• Coupling torque
• on the breaker 16mN
• busbars to primaries 50mN

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Front connection
NW

• NT
• Draw out breaker
• top side long connectors
• bottom side short connectors
• spreaders option
• pole pitch 95 mm
• NW
• Front connection limited to 3200 A
• Draw out breaker
• identical top and bottom connectors

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Fixed installation
NT
NW

• Support bracket
• Vertical or horizontal mounting up to 4000A
• Secondary terminals
• 2 wires from 0,75 to 2,5mm²
• position predefined
• simplified identification
• quick connection
• simple installation
• Rotatable primary connectors
• same as draw out breaker

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Fixed installationFront connection and
accessories

• NT
• Identical top and bottom connectors
• thickness 12 mm
• Accessories
• Spreaders
• pole pitch 95 mm
• edgewise terminal extension
• additional connectors ( eg for cripmled lugs)
• thickness 12 mm for all accessories
• adaptable on fixed or draw out
• NW
• top side long connectors
• bottom side short ones

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ContentsRange and performances

• General characteristics
• NT 3/4P dimensions
• NW 3P dimensions
• NW 4P dimensions
• NT NW performances
• IcU / Icw
• endurances
• Micrologic range

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General characteristics

• Insulation voltage 1000V
• Impulse withstand voltage 12kV
• rated voltage 690V
• Specific versions
• Switch
• 1000V AC
• DC
• 400Hz - 16Hz 2/3
• Transfer switches
• Manual, remote controlled
• Automatic
• by rods 2 NT 2NW
• by cables 2NT, 1NT1NW2NW, 3NW

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Masterpact NT 06 - 16 3P / 4P

• Overall dimensions
• height and depth fixed
• Weight
• fixed 13 / 18 Kg
• draw out 30 / 40 Kg
• Neutral Pole
• On left by default
• protection 1/2, full, off

F 259 D 322

3P F 210 D 288 4P F 245 D 358
F 290 D 277
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Masterpact NW 08-40 40b-63 3P

• Overall dimensions
• Height and depth fixed
• double poles construction for Masterpact NW
  40b-63
• Weight
• fixed
• NW 08 - 40 60 Kg
• NW 40b - 63 120 Kg
• draw out
• NW 08 - 40 90 Kg
• NW 40b - 63 225 Kg
• pole pitch
• 115 mm / 230 mm

F 352 D 439
F 422 D 441
F 297 D 394

F 352 D 479
F 297 D 394
F 774 D 786
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Masterpact NW 08-40 40b-63 4P

• Neutral pole
• on left as default
• protection 1/2, full, off
• Overall dimensions
• Height and depth fixed
• double poles construction for Masterpact NW
  40b-63
• weight
• fixed
• NW 08 - 40 80 Kg
• NW 40b - 63 160 Kg
• draw out
• NW 08 - 40 120 Kg
• NW 40b - 63 300 Kg

F 352 D 479
F 297 D 394
F 997 D 1016
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Masterpact NT Performances 220V to 440V
Icw (0,5 s)
L1
H1
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Masterpact NW Performances 220V to 440V
Icw (1s)
L1
H3
H2
H1
N1
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PerformancesNT NW endurance

• Mechanical endurance
• Electrical endurance

With maintenance
Without maintenance
Nbre de cycles (x1000)
Without maintenance
Nbre de cycle (x1000)
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Micrologic range
A
P
H
5.0 H 6.0 H 7.0 H
2.0 A 5.0 A 6.0 A 7.0 A
5.0 P 6.0 P 7.0 P
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Things will never be the same