ABB Tmax T8 L3692, Инструкция по установке и обслуживанию

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L3692
Tmax T8
23/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
The following versions are available:
a) Electrical signalling of circuit-breaker open/closed
ELECTRICAL signalling of the circuit-breaker state (open/closed) can be obtained with 4 auxiliary contacts.
The auxiliary circuits can have the following confi gurations:
– 4 break/make contacts for PR232-PR331 (4 change-over position contacts)
– 4+1 break/make contacts for PR232 (4 change-over position co 1 for the release)
Reference fi gure in the electrical circuit diagrams: Q/1 to 4 (22)
b) Contact for signalling closing springs loaded/unloaded
This consists of a microswitch, which allows remote signalling of the state of the closing springs of the circuit-breaker operating mechanism.
The contact is always supplied with the spring loading gearmotor.
Reference fi gure in the electrical circuit diagrams: S33 M/2 (11)
c) Contact for signalling undervoltage release energized (C.aux YU)
The undervoltage releases can be equipped with an undervoltage energized signalling contact (normally closed or open, as required) for remote
signalling of the state of the undervoltage release.
Reference fi gure in the electrical circuit diagrams: (12)
Sensors and operations counter
a) Current sensor for the neutral conductor outside the circuit-breaker
The sensor allows neutral protection to be achieved by means of connection to the overcurrent release and is only available for three-pole circuit-
breakers. It is supplied on request.
Reference fi gure in the electrical circuit diagrams: UI/N
b) Homopolar torord for the power supply earthing conductor (neutral point of the transformer)
The PR332 microprocessor-based electronic release can be used in conjunction with an external toroid positioned, for example, on the conductor
that earths the neutral point of the MV/LV transformer (homopolar transformer): in this case, the earth protection is known as Source Ground Return.
The In of the toroid can be regulated to 100 A, 250 A, 400 A, 800 A by using different combinations of connections.
Reference fi gure in the electrical circuit diagrams: UI/0.
c) Homopolar toroid for residual current protection
The toroid enables the residual current protection to be activated and can be used in conjunction with the PR332/P LSIRc release. The accessory
is fi tted with a dip switch-type multiple selector, which is set to suit the required sensitivity (from 3A to 30A). The accessory must be installed on
the busbars and is available in various sizes, up to 3200A.
d) Mechanical operations counter
This is connected to the operating mechanism by means of a simple lever mechanism. It indicates the number of mechanical operations of the
circuit-breaker. The indication is visible on the outside front of the circuit-breaker.
10.2 Mechanical locks
a-b) Lock in open position
Different mechanisms allowing the circuit-breaker to be locked in the open position are available.
These devices can be controlled by:
– A key (a): a special circular lock with different keys (for one single circuit-breaker) or with the same keys (for several circuit-breakers). In this
latter case, up to four different key code numbers are available.
– Padlocks b): up to 3 padlocks (not supplied): Ø 4 mm.
Transparent protection covers
a) Protection covers for opening and closing pushbuttons
Applied over the opening and closing pushbuttons, these protection covers prevent the corresponding circuit-breaker operations unless a special
tool is used.
b) IP54 door protection
This is provided by means of a transparent plastic escutcheon plate which fully protects the front of the circuit-breaker and allows the IP54 degree
of protection to be obtained. It is assembled on hinges and equipped with a key lock.
10.3 Spare parts
The following spare parts are available:
– Front guards and escutcheon plate
– Closing springs
– Operating mechanism
– PR030/B Ultra power supply unit
– Dust-guard fl ange for compartment door
– Lubricating grease for the operating mechanism
– Tool case
Ask for the ABB spare parts catalogue for further details.