COMEM 170SB Buku Petunjuk - Halaman 3

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Safety

Safety instructions

Make sure that any person installing and operating the

pressure relief device:

• Is technically qualified and competent.

• Fully complies with these assembling instructions.

Improper operations or misuse could cause danger to:

• life and limb

• the equipment and other assets of the operator

• the equipment proper function

Safety instructions in this manual are shown in three diffe-

rent forms to emphasize important information.

WARNING

This information indicates particular danger to life and health.

Disregarding such a warning can lead to serious or fatal injury.

CAUTION

This information indicates particular danger to equipment and/

or other property of the user. Serious or fatal injury cannot be

excluded.

NOTE

This notes give important or specific information concerning the

equipment.

Safety notes on the equipment operation

Electrical installation is subject to the relevant national

safety rules.

It is mandatory to connect the grounding cable because of

safety reason.

CAUTION

Installation, electrical connection and fitting the device have to

be carried out by qualified personnel and only in accordance to

this instruction manual.

It is responsibility of the user to make sure that the device is

used for specified application only.

For safety matters, please avoid any unauthorized and

improperly works.

WARNING

All relevant fire protection regulation must be strictly observed.

PRESSURE RELIEF DEVICES 170SB, 170SC AND 170SD

Product description

The pressure relief device protects the transformer

against non-permissible increases in pressure.

Once a specific predetermined value of pressure has

been reached, the pressure relief device will open, reduce

the pressure, and reseal itself tightly after achieving the

required reduction in pressure.

WARNING

It is important to observe the limit values indicated on the

nameplate and in the manual before commissioning the device.

WARNING

The counter-plate preloads the spring assembly and is secured

with N.4 screws M8. Unscrew these screws is strictly forbidden:

Danger of injury!

The manumission of the screws determined the expiration of

the warranty and operating pressure value will be modified.

Installation

CAUTION

The operating and the installation requirements described in

this manual must be strictly following. If not, the device can be

damaged or a malfunction can occur.

CAUTION

The contact surface must be well leveled with a good degree of

roughness (Ra=3.2).

Remove all welding burrs to ensure that the welding seams of

the studs do not interfere with the housing flange holes (flange

slits).

During assembly it is advisable to apply grease on the gasket,

this securing correct seat and preventing its damaging during

fastening.

Apply tightening torque on all the nuts following a cross

sequence.

The pressure relief device can be installed horizontally or

vertically.

Please be sure to leave sufficient space above the valve

(min. 70mm / 2.75mm) so that the optical signaler can be

completely pressed out of the housing when the device is

tripping.

Mounting of the valve

M16

170

235

CREATED BY

Diego Boro

APPROVED ON

COMPANY

COMEM

RESPONSIBLE DEPARTMENT

ITABB-9AAE306693

Figure 1

The pressure relief device has to be mounted on the pre-

ventively machined flange according the drawing (fig.1)

• n.6 nuts M16 UNI5588,

• n.6 grower washers Ø16 UNI1751,

• n.6 plane washers Ø16 UNI 6592

(fig. 2/2) (fig. 3/2) (fig. 4/2).

Screw the nuts with recommended torque (25 Nm /

18.4 Ft·Lbs).

During the valve mounting pay attention to insert the

O-Ring gasket included in the delivery (fig. 2/1) (fig. 3/1)

(fig. 4/1).

Bleeding of the valve

If installed vertically pay attention that the bleed screw

(fig.2/3) (fig.3/3) (fig. 4/3) will be placed in the highest

point.

In any case, both with horizontal and with vertical moun-

ting, is necessary to bleed the valve after the transformer

oil is filled.

Unscrew partly the bleed screw (fig.3/3), to allow to the

excess air to come out then screw the bleed screw

Closing of the valve

The pressure relief device 170SC duct cover (fig. 3/5) must

to be closed after the installation. Duct Cover (Fig. 3/6) has

to be installed using 4 screws with recommended torque (8

Nm / 5.9 Ft·Lbs).

CAUTION

The locking system (available only for type 170SC fig.3/7)

ensures safe transportation and must be removed before

powering up the transformer.

Max withstand pressure: 200 kPa

Figure 2

REVIEWED BY

APPROVED BY

DOCUMENT KIND

BASED ON DOC ID

WORK ORDER ID

PROJECT ID

Component Drawing

TITLE / SUPPLEMENTARY TITLE

COMEM LPT PER CATALOGO

DOCUMENT ID

NV-402

STATUS

REV

ITER

SHEET

Development

3/3

DRAWING SHEET ISO 5457: 1999-A3T

Figure 3

Figure 4