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BS EN 60947-8:2003+A2:2012

$167.15

Low-voltage switchgear and controlgear – Control units for built-in thermal protection (PTC) for rotating electrical machines

Published By Publication Date Number of Pages
BSI 2012 40
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This part of IEC 60947 specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to IEC 60034-11, and the industrial application.

It specifies rules for that type of system comprising a positive temperature coefficient (PTC) thermistor detector having particular characteristics, and its associated control unit.

The PT100 detectors are covered by IEC 60751, where the resistor values are given according to the temperatures of the detector.

The present rules lay down the characteristics of association of this particular positive temperature coefficient thermistor detector and its associated control unit (designated “Mark A detector” and “Mark A control unit”), when they are used in thermal protection systems.

NOTE It is not possible to specify all the requirements for the operating characteristics of a control unit, as they are dependent on some aspects of the thermal detectors. Some aspects of the requirements of the thermal protector system can only be specified when account is taken of the characteristics of the rotating machine to be protected and the method of installation of the detector within the machine.

For these reasons, for each characteristic it is necessary to specify who is responsible for stating the required values and who is responsible for compliance with the requirement and for carrying out any confirmatory test.

Status

Withdrawn

Title

Low-voltage switchgear and controlgear – Control units for built-in thermal protection (PTC) for rotating electrical machines

Publisher

BSI

Committee

PEL/121/1

Pages

40

Publication Date

2012-08-31

Withdrawn Date

2023-04-13

Replaced By

BS EN IEC 60947-8:2023

ISBN

978 0 580 67208 8

Standard Number

BS EN 60947-8:2003+A2:2012

Identical National Standard Of

EN 60947-8:2003/A2:2012, IEC 60947-8:2003/AMD2:2011

Descriptors

Switchgear, Control equipment, Thermal protection, Low-voltage equipment, Rotating electric machines, Electric control equipment, Temperature-measuring instruments, Electric machines, Thermistors, Low voltage, Electrical equipment

Amends

09/30200741 DC, BS EN 60947-8:2003

ICS Codes 29.130.20 - Low voltage switchgear and controlgear
BS EN 60947-8:2003+A2:2012
$167.15