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ABB VM1 Installation And Service Instructions Manual page 12

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VM1 - USER MANUAL
12
6. Structure
6.2. Structure of the circuit breaker
The poles are installed in the rear part of the
circuit breaker frame (fig. 7).
The active parts of the poles (vacuum
interrupters) are embedded and protected against
shocks and other external agents.
1
2a
3
4
5
7
8
1
Terminale superiore
2
Ampolla in vuoto
2a Contatto fisso
2b Contatto mobile
3
Polo
4
Teminale inferiore
5
Connessione flessibile
6
Molla ammortizzatrice
7
Biella isolante
8
Albero di leva
Fig. 7
poles
2
2b
6
With the circuit breaker closed, the current flows
from the top terminal (1) to the fixed contact (2a)
in the vacuum interrupter (2), and then through
the moving contact (2b) and the flexible connector
(5) as far as the bottom terminal of the circuit
breaker (4).
The movements of the moving contact are
ensured by the insulating tie-rod (7) and by the
kinematics (8a).
8a
8a Cinematismo di trasmissione del movimento del comando ai poli
dell'interruttore
9
Regolatore della corsa
10 Sensori di posizione
11 Bobina di chiusura
12 Magneti permanenti
13 Ancora mobile
14 Bobina di apertura
15 Dispositivo manuale di apertura di emergenza
16 Struttura di supporto
16
15
14
13
12
11
10
9

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