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SIGMA ELEKTRIK
L.V Air Circuit Breakers

L.V Air Circuit Breakers

Product catalog summary

Technical Specifications
LV Air Circuit Breakers are available in both draw-out and fixed types, with options for 3 or 4 poles. They handle rated currents from 630 A to 6300 A and operate at 415 V AC. The breakers have a rated insulation voltage of 1000 V and an impulse withstand voltage of 8 kV. They offer protection settings including long-time, short-time, instantaneous, and earth fault protections, with adjustable current and time settings.

General Information
Sigma LV air circuit breakers protect and isolate circuits from overload and short circuit currents. They comply with TS EN 60947-2 and CE norms and come with standard auxiliary contacts. Optional features include motor operators, undervoltage releases, closing coils, and mechanical interlocks.

Draw-Out Type LV Air Circuit Breakers
These breakers can be separated from the main circuit for maintenance using a lever mechanism. They have distinct operation positions: connected, test, and disconnected.

Protection Types and Tolerances
Protection types include long-time reverse time delayed overcurrent protection, short-time delay overcurrent protection, instantaneous tripping protection, and earthing fault protection. Each type has specific current settings and tripping times with defined tolerances.

Control Circuit Characteristics
The control circuit displays current, voltages, fault current, and time, along with alarm and frequency display options. It also features a test function.

Considerations for Control Circuit
To clear faults, press the CLEAR button followed by the RESET button. To set current or time values, use the SAVE button to ensure the values are fixed.

Additional Information
Specifications for connection busbars, control circuit diagrams, and startup procedures are included. Accessories like shunt trip releases, undervoltage releases, and auxiliary contacts are covered.

Specifications and Protection Types
1. Overload Protection: Includes long-time delay (Ir1), short-time delay (Ir2), and instantaneous tripping (Ir3).
2. Earth Fault Protection: Monitors and protects against ground faults (Ir4).
3. Control Circuit Functions: Displays current, phase-to-phase and phase-to-neutral currents, error currents, frequency, and includes test and alarm functions.

Control Circuit Procedures
- To reset circuit breakers after a fault, press CLEAR then RESET.
- Set desired current and time values using the SET and SAVE buttons.
- Trip and Non-Trip buttons are for testing only and require supply voltage.

Factory Set Values
- Rated currents range from 630A to 6300A with specific settings for long and short delay currents, instantaneous tripping, and earth fault currents.

Impact of Ambient Temperature
- Rated current values are affected by ambient temperatures, with specific adjustments needed for temperatures from 40°C to 65°C.

Power Losses
- Power losses vary between fixed and draw-out types, with values provided for different rated currents.

Connection Busbar Specifications
- Details on busbar thickness, width, and quantity for various rated currents.

Startup and Commissioning
- Instructions for preparing the switch mechanism, including lever operation and button pressing sequences.

Coil Specifications
- Low Voltage Coil: Operates between 35%-70% of nominal value, with specific voltage requirements.
- Trip Coil: Allows remote tripping, operating between 70%-110% of nominal value.
- Closing Coil: Ensures circuit breaker is ready for ON position, operating between 85%-110% of nominal value.

Auxiliary Contact and Motor Mechanism
- Auxiliary contacts provide signal locking and are standard with 4NO+4NC configuration.
- Motor mechanism prepares the switch for closing and stores energy for subsequent operations.

Mechanical Interlocking
- Prevents simultaneous operation of two circuit breakers, preferred in network-generator systems.

Protection Curves
- Detailed current-time curves for overcurrent and earth fault protection, illustrating delay and instantaneous ranges.

Specifications:
The document outlines specifications for various models of LV Air Circuit Breakers, including GTW88-2000, GTW88-3200, GTW88-4000, and GTW88-6300. The maximum current ratings are specified as 1200A for GTW88-2000 and 1600A for the other models. The document also details the dimensions for different models, such as SFA-2000, SFA-3200, and SFA-4000, with specific measurements provided in millimeters.

Procedures:
The document includes procedures for setting up and operating the circuit breakers, including manual and motorized setup options. It also describes the operation mechanisms and provides order codes for different configurations.

Standards and Norms:
The circuit breakers conform to standards such as TS1058 and EN60947-2. Rated insulation voltage is specified at 690V, and rated operation voltage at 400V and 690V. The document also specifies breaking capacities and withstand currents.

Recommendations:
Recommendations are provided for using RC (Ready to close contact) and K contacts in network-generator systems, especially in areas prone to voltage drops. The document advises on the use of undervoltage release mechanisms in circuits.

Accessories:
Various accessories are listed, including undervoltage releases, shunt trip releases, closing coils, and motor operators. Specifications for these accessories, such as rated voltage and order codes, are provided.

Order Information:
Detailed order information is provided for different types of circuit breakers, including 3-pole and 4-pole fixed and draw-out types. The document includes type codes, rated currents, breaking capacities, and operation mechanisms.

Catalog excerpts

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LV Air Circuit Breakers Interruptores Automáticos De Bastidor Abierto

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Lv Air Circuit Breakers Interruptores Automáticos De Bastidor Abierto Content Technical Speciﬁcations . . . . . . . . . . . . . . . . . . . . . . . . .62 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 Draw-Out Type LV Air Circuit Breakers . . . . . . . . . . . .63 Especiﬁcaciones Técnicas . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Información General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Interruptores Automáticos De Bastidor Abierto Con Bandeja . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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Lv Air Circuit Breakers Interruptores Automates De Bastidor Abierto © Technical SpecificationsEspecificaciones Tecnicas Type Tpo

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Lv Air Circuit Breakers Interruptores Automáticos De Bastidor Abierto General Information Información General Sigma LV air circuit breakers function to protect and separate the circuit to which they are connected, from over load and short circuit currents. When they are equipped with a motor mechanism, they are ready to perform switch oﬀ at any time. Los interruptores automáticos de bastidor abierto cumplen la función de proteger y separar el circuito al que se encuentran conectados de corrientes de cortocircuito y las sobrecargas. Al contar con un mecanismo de motor siempre está preparado para...

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Sigma ^^elektrik Lv Air Circuit Breakers Interruptores Automaticos De Bastidor Abierto © Long Time Reverse Time Delayed Overcurrent Protection De Sobrecarga Con Retardo Largo De Protection (Ir1) Tiempo Inverso (Ir1) Other Characteristics Of Control Circuit • Current passing through the circuit display function • Phase-Phase and Phase-Neutral voltages display function • Fault current and time display function • Alarm option • Frequency display function • Test function Issues To Be Taken into Consideration With Regard To Control Circuit • It is essential to press on firstly the CLEAR button...

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Lv Air Circuit Breakers di> Interruptores Automates De Bastidor Abierto • Trip and Non-Trip buttons are only for test. if supply voltage is not applied in test circuit, it doesn’t work. • It is essential to pay attention to long-term delay current (Ir1) < short-term delay current (Ir2) < Instant Tripping current (Ir3) conditions while performing current setting so that circuit breaker could perform active protection. Los botones de Trip y Non-Trip son solo para pruebas (test). No funcionan si durante el circuito de prueba no se aplica corriente de alimentation. Para que el Interruptor de circuito...

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Lv Air Circuit Breakers Interruptores Automáticos De Bastidor Abierto Esquema De Conexión Del Circuito De Control Control Circuit Connection Diagram Main circuit Circuito principal Overload trip Disparo de sobrecorriente Emergency trip Apertura de emergencia Electrical trip Apertura eléctrica J2 Fault Fallo Electrical closing Cierre eléctrico Auxiliary switch Llave auxiliar Energy storage Carga de energía Oﬀ switch Interruptor de apagado Power supply SA Processing unit Unidad de procesado Electronic trip Disparo electrónico Not: Closing and tripping coils must not be leﬅ under constant energy....

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Lv Air Circuit Breakers di> Interruptores Automates De Bastidor Abierto 3. 3. When I (PUSH ON) button is pressed, switch contacts are closed and ON-OFF indicator takes ON position, and set up mechanism energy storage indicator takes “Discharged” position. 4. When 0 (PUSH OFF) button is pressed switch contacts are opened and ON-OFF indicator takes OFF position, and set up mechanism energy storage position remains under “Discharged” position. Note: As set up operation shall be performed after each ON-OFF operation automatically in circuit breakers with motor set up, circuit breaker is always ready...

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Sigma ^^elektrik Lv Air Circuit Breakers Interruptores Automates De Bastidor Abierto © Contacto Auxiliar Auxiliary Contact Auxilary contacts change the position in parallel with the ON and OFF contact positions of the circuit breaker, helps to receive and lock out audible and illuminated signals. 4NO+4 NC auxiliary contacts in Sigma power circuit breakers are delivered as a standard to the customers as attached to the switch. Maximum thermic current which auxiliary contacts can carry is 6 A. Motor Mechanism Motor mechanism makes the power switch ready for closing by setting up the set up...

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Lv Air Circuit Breakers di> Interruptores Automates De Bastidor Abierto Caractensticas De Tiempo-Corriente De Sobrecarga Para Los Interruptores Automaticos Overcurrent Protection Current-Time Curve De Bastidor Abierto Caractensticas De Tiempo-Corriente De La Protection Contra Corriente Residual Para Los Earth Fault Protection Current-Time Curve Interruptores Automaticos De Bastidor Abierto

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Sigma ^^elektrik Lv Air Circuit Breakers Interruptores Automates De Bastidor Abierto © Overcurrent Protection Current-Time Curve Curva De Tiempo Corriente De Protection Contra Sobrecarga Earth Fault Protection Current-Time Curve Curva De Tiempo Corriente De Protection De Fallo De Toma A Tierra 10000 Type / Tipo

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Type / Tipo

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Lv Air Circuit Breakers Interruptores Automates De Bastidor Abierto © Order Information Information De Pedido3 Poles Fixed Type LV Air Circuit Breakers Interruptores Automaticos De Bastidor Abierto FijosDe 3 Polos Type code Codigo Oe tipo Note: (*) LV air circuit breakers are delivered as 4NO+4NC Auxiliary contact block is attached. Nota: Los interruptores automaticos de bastidor abierto se despachan con el bloque de contacto auxiliar 4NO+4NC montado. 4 Poles Fixed Type LV Air Circuit Breakers Interruptores Automaticos De Bastidor Abierto Fijos De 4 Polos Type code Rated current In (A) CoOigo...

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