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11. Spare parts and accessories
All assembly operations of spare parts/accessories must
be carried out following the instructions enclosed with
the spare parts, by ABB personnel or by suitably
qualified customer personnel with in-depth knowledge
of the apparatus (IEC 60694) and of all the Standards
aimed at carrying out these interventions in safe
conditions. Should the maintenance be carried out by
the customer’s personnel, responsibility for the
interventions remains with the customer. Before carrying
out any operation, always make sure that the circuit-
breaker is open, the spring discharged and that it is not
energised (medium voltage circuit and auxiliary circuits).
To order circuit-breaker spare parts/accessories, refer to the ordering
sales codes indicated in the technical catalogue and always state the
following:
– type of circuit-breaker
– rated voltage of the circuit-breaker
– rated normal current of the circuit-breaker
– breaking capacity of the circuit-breaker
– serial number of the circuit-breaker
– rated voltage of any electrical spare parts.
For availability and to order spare parts, please contact our Service
office.
11.1. List of spare parts
– Shunt opening release
– Additional shunt opening release
– Undervoltage release
– Contact for signalling undervoltage release energised/de-energised
– Time delay device for undervoltage release
– Mechanical override for undervoltage release
– Shunt closing release
– Spring charging geared motor with electrical signalling of spring
charged
– Contact signalling protection circuit-breaker of the geared motor
open/closed
– Contact signalling closing spring charged/discharged
– Transient contact with momentary closing during circuit-breaker
opening
– Circuit-breaker auxiliary contacts
– Locking electromagnet on the operating mechanism
– Position contact of the withdrawable truck
– Contacts signalling connected/isolated
– Opening solenoid
– Key lock in open position
– Isolation interlock with the door
– Protection for opening pushbutton
– Protection for closing pushbutton
– Locking electromagnet on the withdrawable truck
– Set of six tulip contacts.
12. Electric circuit diagrams
The standard VD4 circuit-breaker electric circuit diagrams are as
follows:
– 1VCD400046: Fixed circuit-breakers
– 1VCD400055: Fixed circuit-breakers with 64-pole connector
– 1VCD400064: Fixed circuit-breakers with 58-pole connector
– 1VCD400078: Fixed circuit-breakers with truck
– 1VCD400048: Withdrawable circuit-breakers
– 1VCD400080: Withdrawable circuit-breakers for ZS8.4 switchgear
VD4/ZS8, ZT8 and Z8 with circuit-breaker.
– 1VCD400080: Withdrawable circuit-breakers for ZS8.4 switchgear
with VD4/ZS8, ZT8 and Z8 circuit-breaker with motorized truck.
Each circuit-breaker is always provided with the standard electric
diagram or with a specific diagram in the case of a circuit-breaker with
non-standard cabling.
