MF DIGITAL 5907-VL Especificações descarregar pdf (Página 10)

3WL Air Circuit Breakers

3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)

General data

Siemens · 2012

Withdrawable short-circuit, grounding, and bridging units

Portable positively-driven grounding and short-circuit devices

are used for the disconnected system sections to verify isolation

from the supply at the workplace.

Withdrawable grounding units allow simple and comfortable

grounding. They are simply inserted into the guide frames in

place of the corresponding withdrawable circuit breakers. This

ensures that these devices are always first connected with the

grounding electrode and then with the components to be

grounded.

The grounding contacts are fitted to the side of the switch enclo-

sure and establish the connection when inserted into the guide

frame.

All withdrawable terminals are short-circuited and grounded on

delivery.

They are easily converted into withdrawable bridging units by

qualified electricians according to the enclosed instructions.

In addition, the withdrawable unit can be adapted to various

rated currents of a size.

Withdrawable short-circuit and grounding unit

The withdrawable short-circuit and grounding unit consists of a

breaker enclosure with penetration blades which are connected

with the short-circuiting link.

Depending on the version, the short-circuiting links are arranged

at the top and/or bottom. The grounding and short-circuit con-

nections are established when the device is inserted.

It must be ensured that the side to be short-circuited and

grounded is not live. For this reason it is recommended that the

withdrawable unit is only wound in when the door is closed.

Withdrawable bridging unit

The withdrawable bridging unit consists of a breaker enclosure

in which all disconnection components and the operating mech-

anism have been replaced with simple connections between the

upper and lower contacts.

Auxiliary releases

Up to two auxiliary releases can be installed at the same time.

The following are available:

1 shunt release

or 1 undervoltage release

or 2 shunt releases

or 1 shunt release

+ 1 undervoltage release.

Signaling switch for auxiliary releases

One signaling contact is used for each auxiliary release to deter-

mine the switch positions of the auxiliary releases.

Shunt release

When the operational voltage is connected to the shunt release,

the circuit breaker is opened immediately. The shunt release is

available in the versions 5 % OP for over-excitation

and 100 % OP for permanent excitation. This means that it is also

possible to block the circuit breaker against being jogged into

closing.

An energy storage device for shunt releases allows the circuit

breaker to be opened even if the control voltage is no longer

available.

Undervoltage release

The undervoltage release causes the circuit breaker to be

opened if the operational voltage falls below a certain value or is

not applied. The circuit breaker cannot be closed manually or by

means of an electrical ON command if the undervoltage release

is not connected to the operational voltage. The undervoltage re-

lease has no delay as standard. A delay can be set by the cus-

tomer in the range between

< 80 ms and

< 200 ms.

In addition, an undervoltage release with a delay in the range

from 0.2 to 3.2 s is available.

Closing solenoid

The closing solenoid is used to close the circuit breaker electri-

cally by means of a local electrical "ON" command or by a re-

mote unit.

Motorized operating mechanism

The operating mechanism is used to load the storage spring au-

tomatically.

The operating mechanism is activated if the storage spring has

been unloaded and the control voltage is available.

It is switched off automatically after loading. This does not affect

manual operation of the storage spring.

Indicators, signals, and control elements

Motor shutdown switch

Control switch for switching off the motorized operating mecha-

nism (automatic loading).

Operating cycles counter

The motorized operating mechanism can be supplied with a

5-digit operating cycles counter. The display is incremented by

"1" as soon as the storage spring is fully loaded.

Resetting the manual tripped signal

When the circuit breaker has tripped, this is indicated by the pro-

truding red mechanical tripped indicator on the ETU. When the

mechanical tripped indicator is activated, the tripping solenoid

and tripped signal are reset. If this display is to be reset remotely,

the reset button can be equipped with a reset solenoid.

This option allows the circuit breaker to be reset both manually

and electrically.

Automatic resetting of reclosing lockout

When the ETU is activated, reclosing of the circuit breaker is pre-

vented until the release is either electrically or manually reset. If

the "Automatic resetting of reclosing lockout" option is used, the

pre-tensioned circuit breaker is ready to close immediately after

tripping. Resetting the manual tripped indicator is not included

in this option.

Tripped signaling switch

If the circuit breaker has tripped due to an overload, short-cir-

cuit, ground fault or extended protection function, the tripped

signaling switch can indicate this. This signaling switch is avail-

able as an option. If the circuit breaker is used for communica-

tion, this option is supplied as standard.

Ready-to-close signaling switches

The 3WL circuit breakers are equipped with an optical ready-to-

close indicator as standard. In addition, the ready-to-close sta-

tus can be transmitted by means of a signaling switch as an op-

tion. If the switch is used for communication, the signaling switch

is supplied as standard.

Short-time current of the ground-

ing contact

kA 15 (500 ms)

Rated operational voltage V

1000 (690 for size I)

Standards

DIN VDE 0683

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 61 62

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