EN 60947-4-1:2010/A1:2012

SLOVENSKI STANDARD
01-december-2012
Nizkonapetostne stikalne naprave - 4-1. del: Kontaktorji in motorski zaganjalniki -
Elektromehanski kontaktorji in motorski zaganjalniki (IEC 60947-4-1:2009/A1:2012)
Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters (IEC 60947-4-1:2009/A1:2012)
Niederspannungsschaltgeräte - Teil 4-1: Schütze und Motorstarter - Elektromechanische
Schütze und Motorstarter (IEC 60947-4-1:2009/A1:2012)
Appareillage à basse tension - Partie 4-1: Contacteurs et démarreurs de moteurs -
Contacteurs et démarreurs électromécaniques (CEI 60947-4-1:2009/A1:2012)
Ta slovenski standard je istoveten z: EN 60947-4-1:2010/A1:2012
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60947-4-1/A1
NORME EUROPÉENNE
October 2012
EUROPÄISCHE NORM
ICS 29.120.99; 29.130.20
English version
Low-voltage switchgear and controlgear -
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters
(IEC 60947-4-1:2009/A1:2012)
Appareillage à basse tension -  Niederspannungsschaltgeräte -
Partie 4-1: Contacteurs et démarreurs de Teil 4-1: Schütze und Motorstarter -
moteurs - Elektromechanische Schütze und
Contacteurs et démarreurs Motorstarter
électromécaniques (IEC 60947-4-1:2009/A1:2012)
(CEI 60947-4-1:2009/A1:2012)
This amendment A1 modifies the European Standard EN 60947-4-1:2010; it was approved by CENELEC on
2012-08-24. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment 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 CEN-CENELEC Management Centre or to any CENELEC member.

This amendment 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
CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-4-1:2010/A1:2012 E

Foreword
The text of document 17B/1769/FDIS, future edition 1 of IEC 60947-4-1:2009/A1, prepared by SC 17B,
"Low-voltage switchgear and controlgear", of IEC TC 17, "Switchgear and controlgear" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN 60947-4-1:2010/A1:2012.

The following dates are fixed:
(dop) 2013-05-24
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-08-24

standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60947-4-1:2009/A1:2012 was approved by CENELEC as a
European Standard without any modification.
Add to the Bibliography of EN 60947-4-1:2010, the following note for the standard indicated:
IEC 61915-2:2011 NOTE  Harmonized as EN 61915-2:2012 (not modified).

- 3 - EN 60947-4-1:2010/A1:2012

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

Addition to Annex ZA of EN 60947-4-1:2010:

IEC 61051-2 1991 Varistors for use in electronic equipment - - -
Part 2: Sectional specification for surge
suppression varistors
IEC 60947-4-1 ®
Edition 3.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –

Part 4-1: Contactors and motor-starters – Electromechanical contactors and

motor-starters
Appareillage à basse tension –

Partie 4-1: Contacteurs et démarreurs de moteurs – Contacteurs et démarreurs

électromécaniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.120.99; 29.130.20 ISBN 978-2-83220-142-8

– 2 – 60947-4-1 Amend.1 © IEC:2012
FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and
controlgear of IEC technical committee 17: Switchgear and controlgear.
The text of this amendment is based on the following documents:
FDIS Report on voting
17B/1769/FDIS 17B/1780/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
INTRODUCTION
This amendment includes the following significant technical changes with respect to the
previous edition 3 (2009):
• introduction of the motor management starter;
• definitions and measurement method of the power consumption of the control circuit
during holding and pick-up operations;
• measurement method of the pole impedance;
• requirements for screwless terminals;
• performance requirements for latched contactors;
• alignments to Amendment 1 of IEC 60947-1:2007;
• harmonisation with IEC 60947-2 of the operation tests of under-voltage relays and shunt
releases;
• short-circuit tests harmonisation with North America;
• test requirements for utilisation AC-6b capacitor load;
• polarity for DC contactors;
• dielectric test method in presence of built-in varistor;
• addition of an extended function for electronic overload relay: control functions.

60947-4-1 Amend.1 © IEC:2012 – 3 –
1.1.2 AC motor-starters
Add, in the first paragraph, the parenthesis "(including motor management starter)" between
"AC motor-starters" and "intended to start".

1.1.2.2.1 Star-delta starters
Replace, in the first sentence of the existing note, "the current" by "the starting current".

1.1.2.3 Rheostatic rotor starters
Delete the existing second paragraph and the existing note.

2 Normative references
Add to the existing list the following normative reference:
IEC 61051-2:1991, Varistors for use in electronic equipment – Part 2: Sectional specification
for surge suppression varistors

3.2 Alphabetical index of terms
Delete from the existing list the following terms and references:
electronic overload relay with current imbalance detection.H.2.2
electronic overload relay with ground/earth fault function .H.2.1
electronic overload relay with phase reversal function.H.2.4
electronic overload relay with under power detection .H.2.6
inhibit current (I ) .H.2.7
ic
Add to the existing list the following new terms and references:
holding power . 3.3.9
motor management starter . 3.4.31
pick-up power . 3.3.10

– 4 – 60947-4-1 Amend.1 © IEC:2012
3.3.8
electronically energized coil of electromagnet
Replace the existing term and definition by the following new term and new definition:
3.3.8.
electronically controlled electromagnet
electromagnet in which the coil is controlled by a circuit with active electronic elements

Add, after the existing definition 3.3.8, the following new terms and definitions 3.3.9 and
3.3.10:
3.3.9
holding power (of a contactor)
power needed to maintain the operation of the electromagnet
3.3.10
pick-up power (of a contactor)
power needed to operate the contactor from the de-energized state to the energized state

Add, after the existing definition 3.4.30, the following new term and definition 3.4.31:
3.4.31
motor management starter
starter including extended functions with communication ability
NOTE Interoperable device profiles for motor management starter are defined by IEC 61915-2.

3.6 Symbols and abbreviations
Add to the existing list the following new symbols:
P Nominal holding power of a d.c. controlled contactor
c
P Pick-up power of a d.c. controlled contactor with separate pick-up and hold-on windings
p
S Holding power of an a.c. controlled contactor
h
S Pick-up power of an a.c. controlled contactor
p
U Voltage drop of a contactor pole
d
Z Pole impedance of a contactor (5.3.7)
"r" Minimum short-circuit test current
I Maximum conditional short-circuit test current
q
Delete from the existing list "I Inhibit current (H.2.7)".
ic
60947-4-1 Amend.1 © IEC:2012 – 5 –
5.3.1.1.2 Rated rotor operational voltage (U )
er
Add, after the second paragraph, the following new paragraph and new note:
The rated insulation voltage of the switching devices inserted in the rotor circuit shall be at
least 50 % the highest voltage between open slip-rings.
NOTE Electrical stresses are lower and shorter in the rotor than in the stator.

5.3.5.5.2 Standard conditions for making and breaking corresponding to the
starting characteristics for rheostatic rotor starters
Delete the existing note.
Add, after the existing Subclause 5.3.6, the following new Subclause 5.3.7:
5.3.7 Pole impedance of a contactor (Z)
The pole impedance may be stated by the manufacturer and is determined by measuring the
voltage drop resulting of the current flowing through the pole.

5.5 Control circuits
Replace the entire existing text by the following new text:
Subclause 4.5 of IEC 60947-1:2007 applies.

5.7.3 Characteristic values
Replace the existing item c) by the following new item c):
c) Release with residual current sensing relay:
– rated current;
– operating current;
– operating time or time-current characteristic according to Table T.1 of
IEC 60947-1:2007, Amendment 1;
– inhibit time (when applicable);
– type designation (see Annex T of IEC 60947-1: 2007, Amendment 1).

6.1.2 Characteristics, basic rated values and utilization
Add, after the exiting item d), the following new item aa):
aa) polarity of terminals, if applicable;

– 6 – 60947-4-1 Amend.1 © IEC:2012
Add, after the existing item h), the following Note 1:
NOTE 1 Other information such as the pole impedance could be given e.g. in the product literature.

Replace the existing Note 1 of item o) by the following new Note 2:
NOTE 2 Other information such as the holding or pick-up power could be given e.g. in the product literature.

Renumber the existing Note 2 and Note 3 as Note 3 and Note 4 respectively.

6.2 Marking
Replace, in the existing third paragraph, "items c) in 6.1.1, k), and s2) in 6.1.2" by " items c)
in 6.1.1, aa), k), and s2) in 6.1.2".
Replace, at the end of the existing fourth paragraph, "and Annex E" by "and Annex U of
IEC 60947-1:2007, Amendment 1".

8.2.1.2 Limits of operation of contactors and power-operated starters
Replace the existing Subclauses 8.2.1.2.1 to 8.2.1.2.4 by the following new text:
Subclause 7.2.1.2 of IEC 60947-1:2007 applies with following additions:
For latched contactors, the device shall drop out and open fully when a de-latching voltage
between 85 % and 110 % of the rated de-latching voltage is applied.

Table 3 – Limits of operation of time-delay overload relays when energized on all poles
c
Delete the existing table footnote and its reference in the table.

d c
Renumber the existing table footnote and its four references in the table as .

e d
Renumber the existing table footnote and its two references in the table as .

a
Replace the text of the existing table footnote by the following new text:
This test shall only be done at 20 °C for A, B and D multiples of current setting.

a
Delete, in column D, the existing reference to the table footnote .

a
Add a new reference to the table footnote at the end of "Electronic type".

60947-4-1 Amend.1 © IEC:2012 – 7 –
8.2.2.7.1 Uninterrupted and eight-hour duty windings
Replace, in the first paragraph, "7.2.2.2" by "7.2.2.6".

8.2.3 Dielectric properties
Replace the entire existing text by the following new text:
Subclause 7.2.3 of IEC 60947-1:2007 applies with the following additions:
General requirements for device including voltage limiting components inserted between
circuits not connected to the ground/earth to be tested according to the dielectric test are
described as follows.
These voltage limiting components called varistors used in order to protect electronic parts
from surges within the device shall comply with IEC 61051-2. In this clause, the intent is not
to reduce the clearances. For the type test of the device the voltage limiting components may
be disconnected.
IEC 61051-2 applies as follows:
a) Preferred climatic categories of the varistor:
• maximum lower temperature: -10 °C
• minimum upper temperature: +85 °C
The device manufacturer has to verify that the varistor is suitable for use in the extended
ambient temperature if any.
b) The minimum rated voltage of the varistor shall be 1,2 times the maximum peak voltage
where the varistor is connected.
c) When connected to the mains, varistors shall withstand the surge test according to
9.4.2.5.
NOTE 1 With the verification of the varistors above it is assumed that a fuse protecting the varistor is not
necessary.
NOTE 2 The possibility given in 8.3.3.4.1 item 1) of IEC 60947-1:2007 of disconnecting circuits between poles
may be not appropriate in the routine test, because the products are completed and it is not appropriate to reopen
and manipulate them. The main purpose of this test is to identify the proper operation of the voltage limiting
component.
– 8 – 60947-4-1 Amend.1 © IEC:2012
Table 7 – Making and breaking capacities – Making and breaking
conditions according to utilization category
Replace the existing Table 7 by the following new table:
Make and break conditions
b
On-time Off-time Number of
Utilization category
I / I U / U Cos φ operating
c e r e
s s
cycles
f
AC-1 1,5 0,8 0,05 50
1,05
h h f
AC-2 4,0 0,65 0,05 50
1,05
i a f
AC-3 8,0 0,05 50
1,05
i a f
AC-4 10,0 0,05 50
1,05
f
AC-5a 3,0 0,45 0,05 50
1,05
c
c
AC-5b 0,05 50
1,5 1,05
j
AC-6a
e l m
AC-6b 1,5 1,05  50
k
a
AC-8a 6,0 1,05 0,05 f 50
k a
AC-8b 6,0 1,05 0,05 f 50
b
On-time Off-time Number of
L / R
Utilization category I / I U / U operating
c e r e
s s
ms
cycles
f d
DC-1 1,5 1,05 1,0 0,05 50
f d
DC-3 4,0 1,05 2,5 0,05
f d
DC-5 4,0 1,05 15,0 0,05 50
c c d
DC-6 1,5 1,05 0,05 60 50
i
Make conditions
b
On-time Off-time Number of
Utilization category
I / I U / U operating
Cos φ
e e
s s
cycles
a
g
AC-3 10 1,05 0,05 10 50
a
g
AC-4 12 1,05 0,05 10 50
I = current made. The making current is expressed in d.c. or a.c. r.m.s. symmetrical values but it is
understood that, for a.c., the actual peak value during the making operation may assume a higher value
than the symmetrical peak value.
I = current made and broken, expressed in d.c. or a.c. r.m.s. symmetrical values
c
I = rated operational current
e
U = applied voltage
U = power frequency or d.c. recovery voltage
r
U = rated operational voltage
e
Cos φ = power factor of test circuit
L / R = time-constant of test circuit

60947-4-1 Amend.1 © IEC:2012 – 9 –
Table 7 (continued)
a
Cos φ = 0,45 for I ≤ 100 A; 0,35 for I > 100 A.
e e
b
The time may be less than 0,05 s, provided that contacts are allowed to become properly seated before re-
opening.
c
Tests to be carried out with an incandescent light load.
d
If polarity not marked on the device, 25 operating cycles with one polarity and 25 operating cycles with
reverse polarity.
e
The load shall consist of commercially available capacitor combinations to obtain a steady-state reactive
current I calculated according to 9.3.3.3.4. Alternatively capacitive ratings may be derived by capacitor
e
switching tests or assigned on the basis of established practice and experience. As a guide, reference may
be made to the formula given in Table 9 which does not take into account the thermal effects due to harmonic
currents. The available current capacity at the test terminals shall not be less than the prospective current "r".
It can be determined by analytical evaluation.
f
See Table 8.
g
For U / U , a tolerance of ±20 % is accepted.
e
h
The values shown are for stator contactors. For rotor contactors, the test shall be made with a current of four
times the rated rotor operational current and a power factor of 0,95.
i
The make conditions for utilization categories AC-3 and AC-4 shall also be verified. The verification may be
made during the make and break test, but only with the manufacturer's agreement. In this case, the making
current multiples shall be as shown for I / I and the breaking current as shown for I / I . 25 operating cycles

e c e
shall be made at a control supply voltage equal to 110 % of the rated control supply voltage U and
s
25 operating cycles at 85 % of U . The off-times are to be determined from Table 8.
s
j
The manufacturer shall verify the AC-6a rating by testing with a transformer or may derive the rating from the
values for AC-3 according to Table 9.
k
A lower ratio of I / I (locked rotor to full load current) may be used if specified by the manufacturer.
c e
l
The on time shall be long enough in order to reach the stabilized current.
m
Off-time according to Table 8. The value of a discharge resistor shall be determined to reach less than 50 V
at the end of off-time.
– 10 – 60947-4-1 Amend.1 © IEC:2012
Table 10 – Conventional operational performance –
Making and breaking conditions according to utilization category
Replace the existing Table 10 by the following new table:
Make and break test conditions
On-time Off-time Number of
Utilization category
I / I U / U Cos φ operating
c e r e
s s
cycles
b c i
0,05 6 000
AC-1 1,0 1,05 0,80
b c i
AC-2 2,0 1,05 0,65 0,05 6 000
a b c i
AC-3 2,0 1,05 0,05 6 000
a b c i
AC-4 6,0 1,05 0,05 6 000
b c i
AC-5a 2,0 1,05 0,45 0,05 6 000
e e b i
AC-5b 1,0 1,05 0,05 60 6 000
g g g g g g
AC-6a
k l m
AC-6b 1 1,05 6 000
b c
AC-8a 1,0 1,05 0,80 0,05 30 000
h, j
a
AC-8b 6,0 1,05 1 9 5 900
d
10 100
On-time Off-time Number of
L / R
Utilization category I / I U / U
operating
c e r e
s s
ms
cycles
b f
DC-1 0,05 c 6 000
1,0 1,05 1,0
b f
c
DC-3 2,5 1,05 2,0 0,05 6 000
b f
c
DC-5 2,5 1,05 7,5 0,05 6 000
e e b f
DC-6 1,0 1,05 0,05 6 000
I = current made or broken. Except for AC-5b, AC-6 or DC-6 categories, the making current is expressed in
c
d.c. or a.c. r.m.s. symmetrical values but it is understood that for a.c. the actual peak value during the
making operation may assume a higher value than the symmetrical peak value.
I = rated operational current
e
U = power frequency or d.c. recovery voltage
r
U = rated operational voltage
e
Cos φ = power factor of test circuit
L / R = time-constant of test circuit

60947-4-1 Amend.1 © IEC:2012 – 11 –
Table 10 (continued)
a
Cos φ = 0,45 for I ≤ 100 A; 0,35 for I > 100 A.
e e
b
The time may be less than 0,05 s, provided that contacts are allowed to become properly seated before re-
opening.
c
These off-times shall be not greater than the values specified in Table 8.
d
The manufacturer may choose any value for the Off-time up to 200 s.
e
Tests to be carried out with an incandescent light load.
f
If polarity not marked on the device, 3 000 operating cycles with one polarity and 3 000 operating cycles with
reverse polarity.
g
The manufacturer shall verify the AC-6a rating by testing with a transformer or may derive the rating from the
values for AC-3 according to Table 9.
h
Tests for category AC-8b shall be accompanied by tests for category AC-8a. The tests may be made on
different samples.
i
For manually operated switching devices,
...