Low-voltage switchgear and controlgear - Part 6-2: Multiple function equipment - Control and protective switching devices (or equipment) (CPS)
1 Scope
This document applies to control and protective switching devices (or equipment) (CPS), the main contacts of which are intended to be connected to circuits of rated voltage not exceeding 1 000 V AC or 1 500 V DC.
It covers control and protective switching device (CPS):
——which provides protective and control functions for circuits and motors;
——where its control function is operated exclusively otherwise than by hand;
——which provides continuity of service after over-current conditions; and
——which can have additional functions, such as isolation or communication.
This document does not apply to:
——auxiliary contacts, covered by IEC 60947-5-1 ;
——CPS used downstream to frequency drive;
Note: Additional requirements for CPS used downstream to frequency drive are under consideration for the next maintenance cycle.
——the use of the product with additional measure within explosive atmospheres, covered by IEC 60079 (all parts);
——embedded software design rules, covered by IEC TR 63201 ;
——cyber security aspects, covered by IEC TS 63208.
The object of this document is to state:
——the characteristics of CPS's;
——the conditions with which CPS's are complying with reference to their operation and
behaviour, their dielectric properties, the degree of protection provided by their enclosure
where applicable, its construction including safety measures against electric shock, fire
hazard and mechanical hazard;
——the tests intended to verify that these conditions have been met, and the methods to be adopted for these tests;
——the information to be marked on or given with the CPS's.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755-2019 Rotating electrical machines-Rating and performance (IEC 60034-1:2017, IDT)
GB/T 17045-2020 Protection against electric shock - Common aspects for installations and equipment (IEC 61140:2016, IDT)
GB/T 19334-2021 Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories (IEC 60715:2017, IDT)
ISO 3864-2 Graphical symbols - Safety colours and safety signs - Part 2: Design principles for product safety labels
......
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions of IEC 60947-1:2020, as well as the following terms, definitions, symbol and abbreviations apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
——IEC Electropedia: available at http://www.electropedia.org/
——ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Terms and definitions related to control and protective switching device (CPS)
3.2.1
control and protective switching device; CPS
mechanical switching device with a control function operated otherwise than by hand capable of:
——making, carrying and breaking currents under normal conditions;
——making, carrying for a specified time in overload condition;
——breaking currents under specified abnormal operating condition such as those of short-circuits;
——continuity of service, with or without local manual operating means
Note 1: The term "with a control function operated otherwise than by hand" means that the device is intended to be controlled and kept in working position from one or more external controls.
Note 2: A CPS can consist of a single device but is always rated as a unit. Coordination can be either inherent or obtained by correct selection of releases in accordance with the manufacturer's instructions.
3.2.2
direct-on-line CPS
CPS which connects the line voltage across the motor terminals in one step
3.2.3
reversing CPS
CPS for starting a motor, intended to cause a motor to reverse the direction of rotation by
reversing the motor primary connections when the motor is not running
Note 1: An application where reversing the motor primary connections while the motor is running is called plugging.
3.2.4
electronically controlled electromagnet
electromagnet in which the coil is controlled by a circuit with active electronic elements
[SOURCE: GB/T 14048.4-2020, 3.2.8]
3.2.5
dedicated wiring accessory
prefabricated connection wiring system specifically intended for identified switchgear or
controlgear
Note 1: A dedicated wiring accessory can be integrated in the switchgear or controlgear or delivered separately.
Note 2: A typical dedicated wiring accessory is for example a connection link.
[SOURCE: GB/T 14048.4-2020, 3.3.32]
3.2.6
phase-loss sensitive relay or release
(motor protection) multipole relay or release for motor protection which operates in case of loss of phase in accordance with specified requirements
3.2.7
under-current relay or release
relay or release which operates automatically when the current through it is reduced below a predetermined value
3.2.8
under-voltage relay or release
relay or release which operates automatically when the voltage applied to it is reduced below a predetermined value
3.2.9
stall relay or release
electronic overload relay or release which operates when the current has not decreased below a predetermined value for a specific period of time during start-up or when the relay or the release receives the input indicating there is no rotation of the motor after a predetermined time in accordance with specified requirements
Note 1: Explanation of stall: rotor locked during start.
Note 2: With appropriate adjustment of the current and starting time settings, such relay or release can be used to detect starts requiring longer than specified times.
3.2.10
jam relay or release
electronic overload relay or release which operates in the case of overload and also when the current has increased above a predetermined value for a specific period of time during operation in accordance with specified requirements
Note 1: A jam is a high overload occurring after the completion of starting which causes the current to reach the locked rotor current value of the motor being controlled.
3.2.11
inhibit time
time-delay period during which the tripping function of the relay is inhibited (may be adjustable)
[SOURCE: GB/T 14048.4-2020, 3.3.29]
3.3 Terms and definitions concerning characteristic quantities
3.3.1
continuity of service
capability to return into service after occurrence of an over-current fault in the circuit under control at all current up to the rated service short-circuit breaking capacity I CS of the control and protective switching device
3.3.2
holding power
power needed to maintain the operation of the electromagnet
[SOURCE: GB/T 14048.4-2020, 3.2.9, modified.]
3.3.3
pick-up power
power needed to operate the device from the de-energized state
[SOURCE: GB/T 14048.4-2020, 3.2.10, modified.]
3.3.4
O
breaking operation by the device under short-circuit current
3.3.5
CO
making operation under short-circuit current followed, after the appropriate opening time, by a breaking operation
Low-voltage switchgear and controlgear - Part 6-2: Multiple function equipment - Control and protective switching devices (or equipment) (CPS)
1 Scope
This document applies to control and protective switching devices (or equipment) (CPS), the main contacts of which are intended to be connected to circuits of rated voltage not exceeding 1 000 V AC or 1 500 V DC.
It covers control and protective switching device (CPS):
——which provides protective and control functions for circuits and motors;
——where its control function is operated exclusively otherwise than by hand;
——which provides continuity of service after over-current conditions; and
——which can have additional functions, such as isolation or communication.
This document does not apply to:
——auxiliary contacts, covered by IEC 60947-5-1 ;
——CPS used downstream to frequency drive;
Note: Additional requirements for CPS used downstream to frequency drive are under consideration for the next maintenance cycle.
——the use of the product with additional measure within explosive atmospheres, covered by IEC 60079 (all parts);
——embedded software design rules, covered by IEC TR 63201 ;
——cyber security aspects, covered by IEC TS 63208.
The object of this document is to state:
——the characteristics of CPS's;
——the conditions with which CPS's are complying with reference to their operation and
behaviour, their dielectric properties, the degree of protection provided by their enclosure
where applicable, its construction including safety measures against electric shock, fire
hazard and mechanical hazard;
——the tests intended to verify that these conditions have been met, and the methods to be adopted for these tests;
——the information to be marked on or given with the CPS's.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755-2019 Rotating electrical machines-Rating and performance (IEC 60034-1:2017, IDT)
GB/T 17045-2020 Protection against electric shock - Common aspects for installations and equipment (IEC 61140:2016, IDT)
GB/T 19334-2021 Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories (IEC 60715:2017, IDT)
ISO 3864-2 Graphical symbols - Safety colours and safety signs - Part 2: Design principles for product safety labels
......
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions of IEC 60947-1:2020, as well as the following terms, definitions, symbol and abbreviations apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
——IEC Electropedia: available at http://www.electropedia.org/
——ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Terms and definitions related to control and protective switching device (CPS)
3.2.1
control and protective switching device; CPS
mechanical switching device with a control function operated otherwise than by hand capable of:
——making, carrying and breaking currents under normal conditions;
——making, carrying for a specified time in overload condition;
——breaking currents under specified abnormal operating condition such as those of short-circuits;
——continuity of service, with or without local manual operating means
Note 1: The term "with a control function operated otherwise than by hand" means that the device is intended to be controlled and kept in working position from one or more external controls.
Note 2: A CPS can consist of a single device but is always rated as a unit. Coordination can be either inherent or obtained by correct selection of releases in accordance with the manufacturer's instructions.
3.2.2
direct-on-line CPS
CPS which connects the line voltage across the motor terminals in one step
3.2.3
reversing CPS
CPS for starting a motor, intended to cause a motor to reverse the direction of rotation by
reversing the motor primary connections when the motor is not running
Note 1: An application where reversing the motor primary connections while the motor is running is called plugging.
3.2.4
electronically controlled electromagnet
electromagnet in which the coil is controlled by a circuit with active electronic elements
[SOURCE: GB/T 14048.4-2020, 3.2.8]
3.2.5
dedicated wiring accessory
prefabricated connection wiring system specifically intended for identified switchgear or
controlgear
Note 1: A dedicated wiring accessory can be integrated in the switchgear or controlgear or delivered separately.
Note 2: A typical dedicated wiring accessory is for example a connection link.
[SOURCE: GB/T 14048.4-2020, 3.3.32]
3.2.6
phase-loss sensitive relay or release
(motor protection) multipole relay or release for motor protection which operates in case of loss of phase in accordance with specified requirements
3.2.7
under-current relay or release
relay or release which operates automatically when the current through it is reduced below a predetermined value
3.2.8
under-voltage relay or release
relay or release which operates automatically when the voltage applied to it is reduced below a predetermined value
3.2.9
stall relay or release
electronic overload relay or release which operates when the current has not decreased below a predetermined value for a specific period of time during start-up or when the relay or the release receives the input indicating there is no rotation of the motor after a predetermined time in accordance with specified requirements
Note 1: Explanation of stall: rotor locked during start.
Note 2: With appropriate adjustment of the current and starting time settings, such relay or release can be used to detect starts requiring longer than specified times.
3.2.10
jam relay or release
electronic overload relay or release which operates in the case of overload and also when the current has increased above a predetermined value for a specific period of time during operation in accordance with specified requirements
Note 1: A jam is a high overload occurring after the completion of starting which causes the current to reach the locked rotor current value of the motor being controlled.
3.2.11
inhibit time
time-delay period during which the tripping function of the relay is inhibited (may be adjustable)
[SOURCE: GB/T 14048.4-2020, 3.3.29]
3.3 Terms and definitions concerning characteristic quantities
3.3.1
continuity of service
capability to return into service after occurrence of an over-current fault in the circuit under control at all current up to the rated service short-circuit breaking capacity I CS of the control and protective switching device
3.3.2
holding power
power needed to maintain the operation of the electromagnet
[SOURCE: GB/T 14048.4-2020, 3.2.9, modified.]
3.3.3
pick-up power
power needed to operate the device from the de-energized state
[SOURCE: GB/T 14048.4-2020, 3.2.10, modified.]
3.3.4
O
breaking operation by the device under short-circuit current
3.3.5
CO
making operation under short-circuit current followed, after the appropriate opening time, by a breaking operation
