Siemens SIVACON S4-ALPHA 유지보수 예약 - 페이지 23

{카테고리_이름} Siemens SIVACON S4-ALPHA에 대한 유지보수 예약을 온라인으로 검색하거나 PDF를 다운로드하세요. Siemens SIVACON S4-ALPHA 40 페이지. Low-voltage switchgear and controlgear assemblies

페이지 인쇄

Switchboard maintenance cycle

Tightening torque

Fastening

Bus-bar/

screw

fairlead

3 Nm

5 Nm

11 Nm

M10

22 Nm

M12

40 Nm

All described procedures aim to ensure

assembly start-up.

When the switchboard begins to work,

it is necessary to plan a number of

scheduled maintenance activities,

at regular intervals. This procedure

guarantees safety and reliability levels,

and reduces repairs and downtimes.

For optimal panel utilization,

maintenance cycles must be observed

rigorously.

Structure of the board and frame

The operations that follow mostly of

consist of a careful visual examination

to inspect for the presence of animals

or bugs, in addition assessing the

functionality of the doors, hinged

covers, etc.

Bus-bar/

These checks must be performed

bus-bar

on each compartments.

5 Nm

8 Nm

Maintenance cycle

20 Nm

40 Nm

• Making sure tightened screws

70 Nm

and bolts

(Operation to be performed twice

yearly)

• Cleaning all metal parts with clean

rags, without liquids

(Operation to be performed twice

yearly)

• Cooling fins and grids must be cleaned

regularly to prevent them from clogging.

(Operation to be performed twice

yearly).

Bus-bar systems and connections

The bus-bar systems and connections

must also be checked regularly and

cleaned with dry and clean rags.

• Visual examination of bus-bars and

insulators conditions

• Insulation resistance measure among

phases and between phases and ground,

after cleaning the bus-bars and their

supporting parts with dry rags.

This test must be performed in according

to CEI EN 61439-1, paragraph 11.9 and

the minimum value measured must

be 1000 Ω; where the voltage is the

nominal value on the ground side.

• Continuity protection circuit, including

metal part connection, such as doors

and panels, carriages, metal parts

of devices.

• Checking correct tightening of

connections with a torque.

The relative torque is specified in the

table

as a function of type of junction used.

For terminal strips, checking the

tightening of connections on the panel

and the system side.

For terminals with leads up to 35 mm

should be verified the correct tightening

according to the torque that can be

worked out from the values listed in the

catalogues.

For safety reasons, these operations

must be performed with the power off

(Operations to be performed twice

yearly).

SIVACON S4 - ALPHA

ENG

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