Siemens VT250 Operating Instructions Manual - Page 7

Browse online or download pdf Operating Instructions Manual for Switch Siemens VT250. Siemens VT250 46 pages. 3vt switch disconnector
Also for Siemens VT250: Installation Instructions Manual (9 pages), Operating Instructions Manual (8 pages)

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Operating Instructions

Read and understand these instructions before installing,

operating, or maintaining the equipment.

DANGER

Hazardous voltage.

Will cause death or serious injury.

Disconnect power before working on equipment.

CAUTION

Reliable functioning of the equipment is only ensured with

certified components.

3VT General information

The 3VT circuit breakers can be delivered with rated currents I

from 10 A to 630 A. For the frame size VT630 the rated current

varies from 400 A to 630 A. Furthermore, the rated operating

voltage is AC 415 / 440 V and the rated insulation voltage is

AC 690 V. The circuit breakers are designed to be used for sys-

tem and motor protection as well as for infrequent switching of

electrical circuits.

The 3VT frame size VT630 is available with thermal-magnetic

overcurrent trip units with either permanently set (fixed) or

adjustable long-time delay overload protection (L). The instanta-

neous short-circuit protection (I) is fixed or can be adjusted

using the LSI of the ETU.

VT630 Operating conditions

3VT circuit breakers are climate-proof. They are designed for

use in enclosed areas in which there are no severe operating

conditions (e.g. dust, corrosive vapors, damaging gases).

For installation in dusty and damp areas, suitable enclosures

(housings, cabinets) must be provided. The ambient tempera-

ture must be between +40 °C and -5 °C, and the average value

within a 24-hour period must not exceed +35 °C;

Altitude: below 2,000 m;

Pollution category: 3;

Utilization category: B.

Installation

The circuit breakers are mounted with M 6 screws in accor-

dance with the dimension drawing (1). See Figure (3) for the

permissible mounting position. The required arc blow-out space

as shown in Figure (2) must be observed.

Connection of the Main and Auxiliary Conductors

The main terminals of the circuit breakers are equipped with

screw connections suitable for the direct connection of cable

lugs or rails. Finely-stranded conductors must be fitted with

cable end sleeves. For permissible conductor cross-sections

and tightening torques, see Table (6).

On 4-pole versions, the neutral conductor is always connected

on the left. Reverse feeding is not allowed. After connection,

terminal shields (optional accessories) may be fitted if required.

For information regarding the main dimensions of optional con-

nections (front extended bus bar and rear screw connection),

see Figure (4).

Operation

Toggle lever position and state indication, see Figure (9).

The circuit breaker and the switching state indicator are opera-

ted by the toggle lever. As additional state indication, three colo-

red symbols appear in the toggle lever cut-out.

A5E00817858-01

After the circuit breaker has tripped (toggle lever in "Tripped"

position), the toggle lever must be moved beyond the 0 ("OFF")

position until it relatches. Only then can the circuit breaker be

reclosed. A closed circuit breaker can be tripped (function test)

by pressing the test button.

(1)

(2)

Required space above arc chutes

Minimum clearance to adjacent

grounded parts as well as to non-

insulated live parts.

(4)

Extended front

terminals

Rear terminals

(screw)

English

(3)

Circuit-breaker