Ormazabal Velatia cgm.3 system Manuale di istruzioni

LIB

cgm.3-huv system

Fully gas-insulated medium-voltage

switchgear:

General instructions

IG-308-EN, version 01, 03/06/2022

In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject

to change without prior notice. These characteristics, as well as the availability of components, are subject to confirmation by

Ormazabal.

CAUTION!

When medium-voltage equipment is operating, certain components are live, other parts may be in movement and some may

reach high temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.

In order to ensure an acceptable level of protection for people and property, and in compliance with applicable environmental

recommendations, Ormazabal designs and manufactures its products according to the principle of integrated safety, based on

the following criteria:

• Elimination of hazards wherever possible.

• Where elimination of hazards is neither technically nor economically feasible, appropriate protection functions are

incorporated in the equipment.

• Communication about remaining risks to facilitate the design of operating procedures which prevent such risks,

training for the personnel in charge of the equipment, and the use of suitable personal protective equipment.

• Use of recyclable materials and establishment of procedures for the disposal of equipment and components so

that once the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the

environmental restrictions established by the competent authorities.

Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of Standard

IEC 62271-1. It must therefore only be operated by appropriately qualified and supervised personnel, in accordance with the

requirements of standard EN 50110-1 on the safety of electrical installations and standard EN 50110-2 on activities in or near

electrical installations. Personnel must be fully familiar with the instructions and warnings contained in this manual and in other

recommendations of a more general nature which are applicable to the situation according to current legislation[1].

The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also

on general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically:

• The equipment must be handled and transported appropriately from the factory to the place of installation.

• All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment

or its essential components.

• Service conditions must be compatible with the equipment rating.

• The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable

operating and safety principles must be clearly understood.

• Maintenance should be performed properly, taking into account the actual service and environmental conditions in

the place of installation.

The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any

jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.

Warranty

The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the

event that defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this

equipment and its repair by the user shall constitute a violation of the guarantee.

Registered Trademarks and Copyrights

All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual

belongs to Ormazabal.

[1] For example, in Spain the “Regulation on technical conditions and guarantees for safety in high-voltage electrical installations” – Royal Decree

337/2014 is obligatory.

IG-308-EN version 01; 03/06/2022 3

General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

Contents

1. General description ...................................................4

1.1. cgm.3-huv models ...........................4

1.2. Standards applied............................4

1.3. Main components ...........................5

1.3.1. Gas tank .....................................6

1.3.2. Driving mechanisms compartment ...........6

1.3.3. Base .........................................7

1.3.4. Name plate ..................................8

1.4. Ratings table.................................9

1.5. Dimensions and weights ....................10

1.6. Operating conditions .......................11

2. Handling and transport...........................................12

2.1. Lifting equipment...........................12

3. Storage......................................................................14

4. Installation ...............................................................15

4.1. Unpacking the equipment ..................15

4.2. Positioning accessories during transport.....16

4.3. Minimum installation distances..............17

4.4. Recommended cable connection trenches...17

4.4.1. Cubicles with internal arc classification

IAC up to 25 kA - 1 s .........................18

4.5. Fixing to floor...............................21

4.5.1. Fixing to floor on profile.....................21

4.5.2. Fixing to floor by anchoring .................21

4.6. Connecting the cubicles.....................24

4.7. Earthing the switchgear .....................24

4.8. Cable connection ...........................25

4.8.1. Bottom front connection ....................26

4.8.2. Top front connection........................28

4.9. Assembling and connecting metering

and auxiliary services transformers in

cgm.3-huv ma ..............................30

5. Recommended sequence of operations.................31

5.1. Checking the gas pressure ..................31

5.2. Voltage presence indicating relay............32

5.3. Phase concordance check ...................33

5.4. Feeder function.............................34

5.4.1. Mimic diagram..............................34

5.4.2. Actuating levers ............................34

5.4.3. Opening operation from earthing position...35

5.4.4. Switch closing operation from isolating

position ....................................36

5.4.5. Opening operation from closed position.....37

5.4.6. Earthing operation from isolating position...38

5.4.7. Cable test...................................39

5.5. Circuit-breaker function with AV/RAV

driving mechanism .........................40

5.5.1. Mimic diagram..............................40

5.5.2. Spring charge and actuating levers ..........41

5.5.3. Opening operation from earthing position...41

5.5.4. Closing operation from isolating position ....43

5.5.5. Opening operation from closed position.....45

5.5.6. Earthing operation from isolating position...47

5.6. -huv-lv and huv-rbv functions ...............49

5.6.1. Mimic diagram..............................49

5.6.2. Feeder function in cgm.3-huv-lv cubicle .....49

5.6.3. Circuit-breaker function in cgm.3-huv-lv

and cgm.3-huv-rbv cubicles .................50

5.6.4. Side incoming earthing function

cgm.3-huv-lv ...............................57

5.6.5. Incoming earthing function

cgm.3-huv-rbv..............................61

6. Safety elements........................................................65

6.1. Acoustic earthing prevention alarm .........65

6.2. Interlocks ...................................65

6.2.1. Padlock interlocking ........................66

6.2.2. Keylock interlocking ........................67

7. Maintenance.............................................................68

7.1. Voltage presence indicating relay test .......68

7.2. Acoustic earthing prevention alarm test .....69

7.3. Preventive maintenance of models

cgm.3-huv-v, cgm.3-huv-lv and

cgm.3-huv-rbv..............................70

8. Spares and accessories ............................................71

9. Environmental information ....................................73

IG-308-EN version 01; 03/06/2022

General description General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

1. General description

[2] Further information at www.ormazabal.com.

Ormazabal's cgm.3-huv system, designed following the

requirements set out in the standards of the International

Electrotechnical Commission (IEC), is made up of dierent

unifunctional and multifunctional switchgear models,

with full SF6gas insulation, which can be used to congure

dierent systems in medium voltage up to 40.5 kV.[2]

1.1. cgm.3-huv models

Unifunctional

switchgear Function

-l Feeder

-v Circuit-breaker

-rc Cable rise

-ma Metering and auxiliary services

Table 1.1. Unifunctional switchgear

Multifunctional

switchgear Functions

-lv 1 feeder function and 1 circuit-breaker function

-rbv 1 rise function in busbars and 1 circuit-breaker

function

Table 1.2. Multifunctional switchgear

1.2. Standards applied

Standard Description

IEC 62271-1 Common specications for high voltage switchgear standards.

IEC 62271-100 High-voltage alternating current circuit-breakers.

IEC 62271-102 Alternating current disconnectors and earthing switches.

IEC 62271-103 High-voltage switches for rated voltages above 1 kV and below 52 kV.

IEC 62271-200 Alternating current metal-enclosed switchgear for rated voltages above 1 kV and up to and including 52 kV.

IEC 62271-206/IEC 61243-5 Voltage presence indicating relay.

IEC 60529 IP ratings for enclosures.

Table 1.3. Standards applied

IG-308-EN version 01; 03/06/2022 5

General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

General description

1.3. Main components

1Gas tank

1.1 Left side connection via bushing or bushlink. Side connection

with female bushing, ask Ormazabal.

2Driving mechanisms area

2.1 Circuit-breaker operation area

2.2

Operations area:

• YELLOW: earthing switch

• GREY: switch-disconnector

2.3 Earthing switch

2.4 ekor.vpis/ekor.ivds live voltage detector

3Base

3.1 Cable compartment access cover

3.2 Medium-voltage cable xing bracket

3.3 Gas relief compartment: Representation with gas relief; there is

also the option of gas output to trench.

3.4 Front cable connection bushings

4Generator incoming cable compartment

4.1 Access cover to generator incoming cable compartment

Figure 1.1. Main elements of cgm.3-huv cubicles

IG-308-EN version 01; 03/06/2022

General description General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

1.3.1. Gas tank

Sealed compartment which houses the busbar and the

switching and breaking elements, where the insulating

material is SF6gas.

Each gas tank has a pressure relief device to facilitate gas

relief in the event of internal arc.

Thanks to the hermetically sealed nature of the gas

tank containing all the medium-voltage elements, the

equipment is expected to have a minimum service life of 30

years, without replenishing the gas according to Standard

IEC 62271-1.

Figure 1.2. Gas tank

1.3.2. Driving mechanisms compartment

This is the compartment in which the switch-disconnector,

earthing switch or circuit-breaker is driven, depending on

the type of function.

The mimic diagram for the main medium-voltage circuit is

displayed on the cover of this compartment.

The mimic diagram includes all the position indicating

relays for the driving elements.

The cgm.3-huv system has, in accordance with the

functional unit, the following types of driving mechanism:

BTilting functional units -l, -rc with earthing via selector

switch and -rb with earthing via selector switch

BM Motorised tilting -l functional units

AV Circuit-breaker without reclosing -v functional units

AMV Motorised circuit-breaker without reclosing -v functional units

RAV Circuit-breaker with reclosing option -v functional units

RAMV Motorised circuit-breaker with reclosing option -v functional units

Table 1.4. Types of driving mechanisms

These elements are operated independently, i.e. their

actuation speed does not depend on the speed of the

manual operation.

The B and BM driving mechanisms can be replaced by

upgrading in any of the three possible positions (closed–

open–earthed). While the driving mechanism is withdrawn,

these positions of the switch can be blocked using a

coupling device, whether in service or not.

IG-308-EN version 01; 03/06/2022 7

General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

General description

1.3.3. Base

Made up of the cable compartment and the gas relief

compartment:

Cable compartment

This is located in the bottom front section of the cubicle

and has a cover interlocked with the earthing switch, thus

allowing front access to the medium-voltage cables.

As standard, it is designed to contain up to:

• Two shielded screw-in cable connectors (reduced) per

phase or one cable connector (reduced) plus surge

arrester (reduced) with space for the corresponding

incoming power cables.

• Cable ties for the power cables.

• Earthing bars.

As an option:

• Two symmetric cable connectors or symmetric cable

connector plus symmetric surge arrester.

Figure 1.3. Cable compartment

Gas relief compartment

Ormazabal's cgm.3-huv system is designed and

constructed to withstand at least the thermal and dynamic

eects of an arc of 25 kA for 1 second should a defect result

in an internal arc in the gas compartment. The system

conducts the gases generated in a fully controlled manner

to avoid any possible injury to people in the equipment

operation area.

Optionally, a relief duct can be tted in the rear of the

cubicle to redirect the gases to the top. Please check

with Ormazabal.

IG-308-EN version 01; 03/06/2022

General description General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

1.3.4. Name plate

Each unit includes a name plate:

Figure 1.4. Example of name plate

Name plate

N° Cubicle serial number*

Type Ormazabal switchgear system.

Designation Cubicle model

Standard Standards applied to the equipment

Name Equipment name

UrEquipment rated voltage (kV)

UpLightning impulse withstand voltage (kV)

UdPower frequency withstand voltage (kV)

frEquipment rated frequency (Hz)

IrEquipment rated current (A)

Instructions Manual General Instructions Manual (IG) for the system

Class Switch class according to IEC 62271-103 and circuit-breaker class according to IEC 62271-100

Ik/IpShort-time withstand current/short-time withstand peak value

tkShort-time withstand current time

Pre Gas pressure inside the gas tank (MPa)

Pme Minimum operating gas pressure (MPa)

SF6Insulating uid mass (kg)

CO2eEquivalent CO2uid mass (t)

Year Year of manufacture

TC Minimum working temperature

IAC Internal arc classication

* In the event of incident, this number should be reported to Ormazabal.

Table 1.5. Name plate

IG-308-EN version 01; 03/06/2022 9

General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

General description

1.4. Ratings table

Rated voltage [kV] 36 40.5

Frequency [Hz] 50 60 50 60

Rated current [A]

Busbars and cubicle interconnection 630

Feeder 630

Generator incoming 250

Rated short-time withstand current [kA]

With tk= (x) s 20* (1 s) | 25 (1 s) 20* (1 s) | 25 (1 s)

Peak value 50*/62.5 52*/65 50*/62.5 52*/65

Rated short-time withstand current of the generator incoming earthing circuit [kA]

With tk= (x) s 5 (1 s) 5 (1 s)

Peak value 12.5 13 12.5 13

Rated insulation level [kV]

Power frequency rated withstand voltage (1 min) 70/80 95/118

Lightning impulse rated withstand voltage 170/195 185/215

Internal arc classication according to IEC 62271-200

IAC AF/AFL 20*/25 kA (1 s) 20*/25 kA (1 s)

IAC AFLR 20*/25 kA (1 s) 20*/25 kA (1 s)

IP rating: gas tank IP X8

IP rating: external enclosure IP 2XD**

Standard unit colour [RAL] grey 7035/blue 5005

Category of loss of service continuity [LSC] LSC2

Compartmentalisation class PM

* Tests carried out with current 21 kA/52.5 kA.

** Consult Ormazabal for other IP rating.

Table 1.6. Characteristics

The values set out in this table are general for the

cgm.3-huv system and are only valid when conrmed

by Ormazabal. Some cubicle models can withstand

partial values. For further information, please ask

Ormazabal.

IG-308-EN version 01; 03/06/2022

General description General instructions

cgm.3-huv system: Fully gas-insulated

medium-voltage switchgear

1.5. Dimensions and weights

Figure 1.5. Dimensions cgm.3

Cubicle Width (a)

[mm]

Depth (f)

[mm]

Height (h)

[mm]

Bushings height (g)

[mm]

Cable fastening

height (i)

[mm]

Weight

[kg] Gas output

l 418 860 1305 603 135.5 145

Downwards

through cable

trench

v 595 860 1305 256 0 235

rc 378.5 860 1305 845.5 133 35

ma 595 1152 1800 845.5 453 135

rbv* 595 860 2050 487 110 305

lv* 595 860 2050 487 110 325

l 418 860 1305 603 135.5 145

Upwards through

relief duct

(chimney)**

rc 378.5 1152 1305 845.5 133 45

ma 595 1152 1800 845.5 453 135

rbv* 595 1152 2050 487 110 325

lv* 595 1152 2050 487 110 345

* In the generator incoming cable compartment the gases output is directly upwards.

** Chimney depth: 292 mm.

Table 1.7. Cubicle dimensions and weights

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