untitled Li ce ns ed C op y F U LL N A M E , D A T E , U nc on tr ol le d C op y, ( c) B S I BRITISH STANDARD BS EN 50216 3 2002 Incorporating Amendments Nos 1 and 2 Power transformer and reactor fitt[.]
Trang 1BRITISH STANDARD BS EN
50216-3:2002
Incorporating Amendments Nos 1 and 2
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
12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:
Trang 2This 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
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.
Amendments issued since publication
14728 4 November 2003 Changes to Table 2
16777 30 November 2006 See national foreword
Trang 3EUROPEAN STANDARD EN 50216-3
January 2002
NORME EUROPÉENNE +A1 December 2002
EUROPÄISCHE NORM
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
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
+A2
October 2006
Trang 4Foreword
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
- latest date by which the national standards conflicting
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
- latest date by which the national standards conflicting
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
– latest date by which the national standards conflicting
_
Trang 5– 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
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
7 Electrical characteristics of switch 6
7.1 Rated currents 6
7.2 Breaking and making capacity 6
7.3 Operation time 6
8 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
9 Nameplate 7
10 Tests 7
10.1 Routine tests 7
10.2 Type tests 7
Trang 61 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
Addition to EN 50216-1:
Terminal marking and distinctive number - General rules
equipment against external mechanical impacts (IK code)
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
(alarm/tripping)
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
Trang 7– 5 – EN 50216-3:2002
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)
See Figures 1 to 4
6.1 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
6.3 Leakage detection
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
#The alarm contact shall operate due to a gas displacement (volume of gas collected)
between 100 cm³ and 200 cm³.$
#The alarm contact shall operate if the oil level in the relay drops by the same volume as for gas collection.$
Trang 86.5 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
maximum temperature range This accuracy shall be fulfilled over the whole range
6.6 Temperature indicator
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
7.3 Operation time
During operation, the contacts shall operate within 0,5 s maximum
8.1 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
# shall be ± 3 % of the
$
#The temperature indicator range shall be from -30 °C to +120 °C or 150 °C Restorable maximum pointer is optional upon demand.$
#Table 2 – Breaking and making capacity (NO and NC contacts)
Voltage Uninterrupted current
(making capacity)
Interrupted current (breaking capacity)
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 $
Trang 9– 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 Routine tests
10.1.1 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
Trang 1010.2.2 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
After the test, no leakage and correct operation of the relay shall be observed
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)
This figure shows preferred arrangements and typical dimensions
Figure 1 – Outline and mounting details: general view
Flange axis
Sensor length
Trang 11– 9 – EN 50216-3:2002
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
Trang 12BSI
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