Chave Seccionadora 11kv

MV exterior Off-Load chave seccionadora
(Alternando seccionador atual)

ESPECIFICAÇÃO TÉCNICA

	
1. 		Escopo
   		Tipo IST off-carga switchs são adequados para utilização em zona tropical, com a temperatura ambiente máxima de aproximadamente 40 graus centígrados e uma temperatura média de cerca de 28 graus centígrados, com elevada humidade e precipitação pesada. A altitude operacional preferido é de até 1800 m acima do nível do mar.
   		
   		Sistema Elétrico
   		Tipo IST off-load interruptor isolador são projetados para operação contínua em um 3-fase 3 fios 11, 15,22,24,27and 33,36kV, 50 / 60Hz sistema de distribuição com o ponto-estrela do transformador ponto-fonte ligada à terra através de uma bobina de supressão de arco ou aterramento do resistor.
   		
   		Standards
   		Tipo IST off-load interruptor isolador são respeitadas normas pertinentes das seguintes normas, juntamente com todas as alterações em curso;
   		 IEC62271-102: 2003: de alta tensão seccionadores de corrente alternada e chaves de aterramento
   		      IEC60129: 1984: Alternando seccionadores e comutadores atuais terra
   		      IEC 60265-1: 1998: comutadores de alta tensão – Parte 1: Switches para Classificado
   		                       tensão acima de 1kV e menos de 52kV
   		
   		      IEC 60694: 1996: As especificações comuns para comutadores de alta tensão e
   		                       normas controlgear
   		
   		      IEC 60815: 1986: Guia para a seleção de isoladores em relação a
   		                        condições poluídas
   		
   		      BS EN ISO 1461: dip revestimentos galvanizado a quente de ferro fabricada e
   		                                Especificações artigos- aço e métodos de ensaio
   		4.0 Construção
   		4.1 Geral
   		4.1.1 Tipo IST off-load switchs isoladores são a montagem vertical / horizontal
   		Tipo para montagem em uma estrutura única ou H-pólo para cima
   		linhas ou alimentadores das secções energizado.
   		         
   		4.1.2 Tipo IST switchs off-load isoladores são compatíveis e pronto para
   		instalação em postes de aço tubular e postes de concreto fiadas.
   		 4.1.3 O projeto é de um ar isolados "balanço isolante"
   		digitar com as duas mensagens de isoladores fixa e uma móvel
   		isolador de pós por fase.
   		        
   		4.1.4 Todas as peças de aço e ferro será galvanizado para proteger da corrosão
   		por BS EN ISO 1461
   		 
   		            4.1.5 Tipo IST off-load switchs isoladores são equipados com um único mecanismo de funcionamento e barras de acoplamento adequados que vão operar todas as fases simultaneamente e que as operações independentes de cada
   		                       pólo, independentemente do estado dos outros pólos, não é permitido

	 
	ESPECIFICAÇÕES
	 

	 

	 

1.1 Operation
1.1.1 Type IST off-load isolator switchs are designed to provide a smooth,
Lightweight action requiring minimum maintenance.

1.1.2 The complete operating mechanism parts are sufficiently
Insolated from live parts, and grounded for the safety of the operator.
The operating mechanism shall be of robust,adjustable design with padlock facility in either the "OPEN" and "CLOSE" positions.

1.1.3 The complete operating mechanism are comed complete with an
Operating handle and shall be designed for steady manual operation
From ground level.

1.1.4 The insulation for the operating mechanism handle are sufficient
For the safety of the operations and preferably incorporated with an
Anti-slip grip.

1.1.5 The vertical drive rod is suitable length and shall be provided
With facilities to extend or reduce the length. Suitable couplings and operating rod guides shall be supplied with each operating mechanism.

1.1.6 If possible, it can be designed that the operating mechanism handle
use for both LEFT and RIGHT hand operations. The direction
Of the operations are clearly indicated on the operating mechanism.

1.1.7 Type IST off-load isolator switchs are designed to prevent unwanted
Operations such that:

1.1.7.1 Type IST off-load isolator switchs OPEN or CLOSE position are
remain constant despite:

a. forces arising from gravity,vibration or reasonable shock
b. accidental touching of the connecting rods or operating
devices
c. electromagnetic forces

1.1.1.1 Type IST off-load isolator switchs have provisions to prevent
Unauthorized operations
1.1.2 The OPEN or CLOSE position of the Off-Load Isolator Switch are
Easy to see from ground level by:
1.1.2.1 having a visible gap or isolating distance
1.1.2.2 having a reliable indicating device of the position of the movable
contacts.

1.1.3 Type IST off-load isolator switchs have adequate mechanical
Strength on its terminal to withstand the total forces,including
Wind loading and electromagnetic forces, related to its application
And rating,without reduction of its reliability or current carrying once
It has been installed vertically on single or H-pole structure.

1.2 Grounding
An earth terminal stud with a minimum size M12 shall be provided for the
Grounding of the operating mechanism, the terminal is marked with the
"earth" symbol.

1.3 Insulator
The materials for the insulator is silicon rubber or Porcelain, Other composite material Such as EPDM and porcelain can be Choosed.

1.4 Stationary and Moving Contacts

1.4.1 The main current carrying contacts are designed to ensure good
Electrical conductivity and to minimize pitting during operation. The
Design shall also ensure that a constant pressure is applied uniformly
Between the moving and fixed contacts.

6.2 Type Test

6.2.1 Type IST off-load isolator switchs had passed the type tests in accordance to IEC62271-102, IEC 60265-1 (or equivalent), IEC 60694 (or equivalent) and other related amendments,

a. Dielectric test per Clause IEC 62271-102-2001 Ed 1.0 2001-12
b. Measurement of resistance of the main circuit as per Clause IEC 62271-1-2007
c. Temperature rise tests as per Clause IEC 62271-102-2001
d. Short-time withstand current and peak withstand current tests as per Clause IEC 62271-102
e. Mechanical operation tests as per Clause 6.102 IEC 60265-1
Type Tests for items a,b,c&e as mentioned in Clause 7.2.1 above are conducted at an accredited independent laboratory and
6.2.2 Type Tests for items d as mentioned in Clause 7.2.1 above is conducted at an STL or STLA laboratory CPRI INDIA
6.3 Routine Tests

Routine tests are carried out by the manufacturer on all products in the finished state or, where appropriate, during the manufacturing processes. The routine test that are made on Type IST off-load isolator switchs are:-

i. Dielectric test per Clause IEC 62271-102
ii. Measurement of resistance of the main circuit IEC 62271-102
iii. Design and visual check as per IEC 62271-102
iv. Mechanical operation tests per Clause IEC 62271-102

7.0 Quality Control

We are arleady set up and implement a good quality management system. This system shall be inspect/audited by The customer appointed Quality Audit Agent before the commencement of any new contract and subsequently at agreed regular interval to ascertain the proper implementation of the quality management system.