Punerea La Pamant - ABB HD4/ESB Series Installation And Service Instructions Manual

7.7. Punerea la pamant

Pentru varianta fixa a intrerupatoarelor se va realiza conectarea
la surubul marcat cu simbolul de punere la pamant.
Se va curata si degresa zona de contact cu un diametru de
circa 30 mm. Dupa realizarea conexiunii se va acoperii zona
respectiva cu vasilina.
Pentru alegerea conductorului de punere la pamant se va
tine cont de standardele in vigoare.
7.8. Conectarea circuitelor auxiliare
Note
– Valoare minima a sectiunii conductoarelor folosite pentru circuitele
secundare nu trebuie sa fie mai mica decat sectiune conductoarlor
folosite in interiorul intrerupatorului
– Aceste conductoare trebuie testata inainte de instalare cu 3kV
ca tensiune de test.
7.8.1. Intrerupatorul in varianta fixa
Conectarea circuitelor auxiliare ale intrerupatorului trebuie facuta
prin intermediul unei cutii terminala montata pe intrerupa-
tor.
In afara intrerupatorului circuitele vor fi trase prin conducte
sau prin canal de cabluri.
Inainte de inlaturarea capacului mecanismului de
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actionare pentru acces la cutia terminala, se veri-
fica ca intrerupatorul este deschis si arcul este nearmat
7.8.2. Intrerupatorul debrosabil
Circuitele secundare ale intrerupatorului debrosabil sunt com-
plet cablate din fabrica. Trebuie tinut cont de schemele
de circuite secundare ale casetei sau ale celulelor in care sunt
montate intrerupatoarele.
14/40 - 647016/002 M3650 - 2000/05/24 ro-en
7.7. Earthing
For fixed version circuit-breakers, use the screw marked with
the relative symbol to effect the earthing.
Clean and degrease the surrounding area for a diameter of
about 30 mm. After completion of the assembly, cover the
entire joint with vaseline.
Use a conductor (busbar or braid) with a cross-section as
indicated in the Standards in force.
7.8. Auxiliary circuit connection
Notes
– The minimum cross-section of the wires used for the auxiliary
circuits must not be less than that used for internal wirings. They
must also be insulated for 3 kV test voltage.
– Before carrying out the connection of the auxiliary circuits, it is
advisable to check the selected type of automatism provided for
operation of the pressure switch (if provided) referring to the latest
technical documentation supplied by ABB.
7.8.1. Fixed circuit-breaker
The connection of the circuit-breaker auxiliary circuits must be
made via the terminal box mounted on the circuit-breaker
structure.
Outside the circuit-breaker the wires must run inside appropri-
ately earthed metal tubes or ducts.
Before removing the operating mechanism cover to
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access the terminal box, make sure that the circuit-
breaker is open and the closing springs discharged.
7.8.2. Withdrawable circuit-breaker
The auxiliary circuits of the withdrawable circuit-breaker are
fully cabled in the factory as far as the connector. For the
external connections, please refer to the electric diagram of the
CBE enclosure or of the switchboard.