BS EN 50216-3 2002

BRITISH STANDARD

BS EN 50216-3:2002 Incorporating Amendments Nos. 1 and 2

Licensed Copy: :FULLNAME, : DATE, Uncontrolled Copy, (c) BSI

Power transformer and reactor fittings — Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion

The European Standard EN 50216-3:2002, incorporating amendments A1:2002 and A2:2006, has the status of a British Standard

ICS 29.180

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BS EN 50216-3:2002

National foreword This British Standard was published by BSI. It is the UK implementation of EN 50216-3:2002, incorporating amendments A1:2002 and A2:2006.


The start and finish of text introduced or altered by amendment is indicated in the text by tags !". Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated in the text by !". The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers. A list of organizations represented on PEL/14 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 12 April 2002

© BSI 2006

ISBN 0 580 39500 6

Amendments issued since publication Amd. No.

Date

Comments

14728

4 November 2003

Changes to Table 2

16777

30 November 2006 See national foreword

EN 50216-3

EUROPEAN STANDARD

January 2002

+A1

NORME EUROPÉENNE

December 2002

EUROPÄISCHE NORM

October 2006

+A2

ICS 29.180


English version

Power transformer and reactor fittings Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion

Accessoires pour transformateurs de puissance et bobines d'inductance Partie 3: Relais de protection pour transformateurs et bobines d'inductance hermétiques immergés dans un liquide et sans matelas gazeux

Zubehör für Transformatoren und Drosselspulen Teil 3: Schutzrelais für ohne Gaspolster hermetisch verschlossene flüssigkeitsgefüllte Transformatoren und Drosselspulen

CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50216-3:2002 E

EN 50216-3:2002

–2–

Foreword This European Standard was prepared by the Technical Committee CENELEC TC 14, Power transformers.


The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50216-3 on 2001-09-25. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement

(dop)

2002-10-01

- latest date by which the national standards conflicting with the EN have to be withdrawn

(dow)

2004-10-01

EN 50216-3 is to be read in conjunction with EN 50216-1. Foreword to amendment A1 This amendment was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 50216-3:2002 on 2002-11-01. The following dates were fixed: - latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement

(dop)

2003-11-01

- latest date by which the national standards conflicting with the amendment have to be withdrawn

(dow)

2005-11-01

Foreword to amendment A2 This amendment to the European Standard EN 50216-3:2002 was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A2 to EN 50216-3:2002 on 2006-10-01. This amendment A2 supersedes EN 50216-3:2002/A1:2002. The following dates were fixed: –

–

latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement

(dop)

2007-10-01

latest date by which the national standards conflicting with the amendment have to be withdrawn

(dow)

2009-10-01

___________________

–3–

EN 50216-3:2002

Contents


Page 1

Scope ............................................................................................................................... 4

2

Normative references...................................................................................................... 4

3

Identification of relays .................................................................................................... 4

4

Service conditions .......................................................................................................... 5 4.1

Maximum inclination ................................................................................................. 5

4.2

Operating pressure................................................................................................... 5

4.3

Sensitivity of the relay contacts to magnetic fields.................................................... 5

5

Outline and mounting details ......................................................................................... 5

6

Operational performance................................................................................................ 5

7

8

9

6.1

General .................................................................................................................... 5

6.2

Gas collection........................................................................................................... 5

6.3

Leakage detection .................................................................................................... 5

6.4

Pressure detection ................................................................................................... 5

6.5

Temperature detection (for relay type 2) .................................................................. 6

6.6

Temperature indicator .............................................................................................. 6

Electrical characteristics of switch................................................................................ 6 7.1

Rated currents.......................................................................................................... 6

7.2

Breaking and making capacity.................................................................................. 6

7.3

Operation time.......................................................................................................... 6

Mechanical requirements ............................................................................................... 6 8.1

Terminal box ............................................................................................................ 6

8.2

Testing facilities........................................................................................................ 7

8.3

Gas sampling ........................................................................................................... 7

8.4

Presence of gas in the relay ..................................................................................... 7

Nameplate........................................................................................................................ 7

10 Tests................................................................................................................................. 7 10.1 Routine tests ............................................................................................................ 7 10.2 Type tests................................................................................................................. 7

EN 50216-3:2002

1

–4–

Scope

EN 50216-3 applies to protective relays for hermetically liquid-immersed transformers, complying with the EN 60076 series, and reactors, complying with EN 60289, without gaseous cushions for indoor or outdoor installation.


This part of EN 50216 defines the – – – – –

operating limits, outline and mounting details, operational performance, electrical characteristics, dynamic characteristics.

Should environmental conditions and dynamic stress requirements differ from those detailed in clause 3 of EN 50216-1, EN 50216-3 may then be applied by agreement between purchaser and supplier for those parts which are not affected by such abnormal installation conditions. NOTE EN 50216-3 may be used as far as applicable for relays with mercury switches. Restrictions on the use of mercury devices may be imposed by national regulations.

2

Normative references

Addition to EN 50216-1: EN 50005

1976

Low-voltage switchgear and controlgear for industrial use Terminal marking and distinctive number - General rules

EN 50102

1995

Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)

EN 60076

series

Power transformers (IEC 60076 series)

EN 60289

1994

Reactors (IEC 60289:1988, mod.)

EN 60947-5-1 + A12

1997 1999

Low-voltage switchgear and controlgear Part 5-1: Control circuits devices and switching elements Electromechanical control circuit devices (IEC 60947-5-1:1997)

3

Identification of relays

Two types are identified in EN 50216-3 which shall meet the following functions: Table 1 – Identification of relays Function

Relay type 1

Relay type 2

Gas and leakage detection

1 contact

1 contact

Overpressure detection

1 contact

1 contact

Over temperature detection

2 contacts (alarm/tripping)

Temperature indicator

Yes

Yes

Visual leakage control

Yes

Yes

NOTE The two functions gas and leakage detection are usually actuated by one contact in common.

Other types of relay having additional functions to those defined in Table 1 are acceptable by agreement.

–5–

4

EN 50216-3:2002

Service conditions

In addition to the service conditions specified in EN 50216-1, the relay shall meet the conditions detailed in this clause. Lower protection against environmental conditions may be agreed between purchaser and supplier for indoor installation.


4.1

Maximum inclination

The relay is intended to function in a vertical position. An inclination of up to 5° to the vertical axis shall be admissible in the direction of the liquid flow (mobile equipment, trailer...). Other values may be agreed between purchaser and supplier. 4.2

Operating pressure

The maximum continuous operating pressure shall be 50 kPa. 4.3

Sensitivity of the relay contacts to magnetic fields

The relay shall be able to withstand a d.c. magnetic field up to 25 mT in any direction and any polarity without inadvertent operation. NOTE During operation and in case of faults, the surroundings of the transformers or reactors are subjected to magnetic fields which could produce inadvertent operation of the relays equipped with magnetic contacts (reed type).

5

Outline and mounting details

See Figures 1 to 4.

6 6.1

Operational performance General

Contacts shall be potential free. Materials of the protective relay shall be heat resistant at 115 °C. This relay shall also permit partial refilling of liquid of transformer. The level of the liquid shall be visible. 6.2

Gas collection

#The alarm contact shall operate due to a gas displacement (volume of gas collected) between 100 cm³ and 200 cm³.$

6.3

Leakage detection

#The alarm contact shall operate if the oil level in the relay drops by the same volume as for gas collection.$

6.4

Pressure detection

The pressure detecting device shall operate at a pressure of 50 kPa or according to transformer or reactor manufacturer’s requirement.

EN 50216-3:2002

6.5

–6–

Temperature detection (for relay type 2)

The relay shall be equipped with two adjustable contacts for the range from 30 °C to 120 °C or to 150 °C. Accuracy for the temperature releasing alarm or tripping # shall be ± 3 % of the maximum temperature range.$ This accuracy shall be fulfilled over the whole range.


6.6

Temperature indicator

#The temperature indicator range shall be from -30 °C to +120 °C or 150 °C. Restorable maximum pointer is optional upon demand.$ NOTE This device should not operate when the transformer is submitted to a short circuit test performed in accordance with EN 60076-5.

7

Electrical characteristics of switch

This device is based on EN 60947-5-1. 7.1

Rated currents

The rated current shall be 2 A r.m.s. with the short time current 10 A r.m.s. for 30 ms. 7.2

Breaking and making capacity #Table 2 – Breaking and making capacity (NO and NC contacts) Voltage

Uninterrupted current (making capacity)

Interrupted current (breaking capacity)

24 V d.c. to 220 V d.c.

2A

100 mA

L/R < 40 ms

230 V a.c.

2A

2A

cos ϕ > 0,5

Other values may be agreed between purchaser and supplier. The minimum contact life shall be 1 000 operations. Only in case that the device has to operate in a system at 24 V d.c. and making capacity up to 0,5 VA, the switches shall be able to make a low current down to 10 mA even after one year of non-operation.$

7.3

Operation time

During operation, the contacts shall operate within 0,5 s maximum.

8 8.1

Mechanical requirements Terminal box

A terminal box shall be provided with three terminals for each function and one earth terminal. The thread of the earth terminal should be M4 or larger. The earth terminal shall be clearly marked. The terminals shall be designed to accept cables having a cross sectional area between 1,5 mm² and 2,5 mm². It shall be possible to fit this cable box with two cable glands Pg 21. The terminal box cover shall be to class IP 55 in accordance with EN 60529 and equipped with sealable unremovable fastening.

–7–

EN 50216-3:2002

Mechanical impact protection shall be to class IK 07 in accordance with EN 50102. 8.2

Testing facilities

Checking of the contact operation for all the functions shall be possible without the contacts or their operating mechanism being damaged.


8.3

Gas sampling

The relay shall be equipped with an easily accessible sampling petcock. The sampling petcock shall not leak. A facility shall be allowed for the connection of 3,17 mm (1/8’’) tubing and it shall be possible to seal it to prevent inadvertent opening. 8.4

Presence of gas in the relay

It shall be possible to visually check the presence of any gas from at least three sides.

9

Nameplate

The nameplate shall contain at least the following information: – name of supplier; – serial number, – number of this standard and year of edition; – type of relay; – connection diagram; – seismic withstand class. The type of relay shall allow identification of the relay characteristics from the operating and maintenance manual supplied by the supplier.

10

Tests

Reference to EN 60076-1 shall be made for definitions concerning testing. In addition to the tests specified in EN 50216-1, the following tests shall be carried out: 10.1 10.1.1

Routine tests Oil leakage test

The relay shall be subjected to an oil leakage test by application of 100 kPa of hot oil at 90 °C for a period of 30 min. The relay shall not leak. 10.1.2

Operation test

All the functions defined in clause 6 shall be checked. Gas detection and leakage detection shall be checked in the operating position. 10.2

Type tests

10.2.1 Determination of the volume of gas or liquid sufficient to operate the contact at ambient temperature.

EN 50216-3:2002

–8–

10.2.2 Operation of the relay with an inclination of 5 ° (unless otherwise agreed between purchaser and supplier) in comparison to all directions from the vertical direction. 10.2.3

Pressure test, 250 kPa for 2 min under oil at 115 °C.

NOTE Sensors, if any, may be removed during the test.

10.2.4 Contacts magnetic field withstand test: the contacts shall not operate due to a magnetic field lower than the specified value (see 4.3).

Flange axis

Sensor length

Sealable screw


After the test, no leakage and correct operation of the relay shall be observed.

This figure shows preferred arrangements and typical dimensions.

Figure 1 – Outline and mounting details: general view


–9–

Figure 2 – Fixing detail

Terminal marking in accordance with EN 50005 (Relay oil filled)

Figure 3 – Terminal box arrangement

97 + 2

Figure 4 – Cover detail

EN 50216-3:2002

BS EN 50216-3:2002

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BS EN 50216-3 2002

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