Internal Components Forms of Separation

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1 IEC One or more of the following conditions can be attained by dividing ASSEMBLIES by means of partitions or barriers (metallic or non-metallic) into separate compartments or enclosed protected spaces: - protection against contact with hazardous parts belonging to the adjacent functional units. The degree of protection shall be at least IPXXB; - protection against the passage of solid foreign bodies from one unit of an ASSEMBLY to an adjacent unit. The degree of protection shall be at least IP2X. NOTE The degree of protection IP2X covers the degree of protection IPXXB. Main Criteria Subcriteria Form No internal separation Form 1 Separation of from the functional units Separation of from the functional units and Separation of terminals for external conductors from the functional units, but not from those of other functional units Separation of from all functional units and Separation of terminals for external conductors associated with a functional unit from those of any other functional unit and the conductors not separated from conductors not separated from conductors in the same compartment as the associated functional unit conductors not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments The form of separation and higher degrees of protection shall be the subject of an agreement between manufacturer and user. 07/02/12 RO'C PEB

2 IEC Typical arrangements of internal separation by barriers or partitions are described in Table 104 and are classified as forms The form of separation and higher degrees of protection shall be the subject of an agreement between ASSEMBLY Manufacturer and User. PSC-ASSEMBLIES can be divided to attain one or more of the following conditions between functional units, separate compartments or enclosed protected spaces: - protection against contact with hazardous parts. The degree of protection shall be at least IP XXB; - protection against the passage of solid foreign bodies. The degree of protection shall be at least IP 2X NOTE The degree of protection IP 2X covers the degree of protection IP XXB. Separation may be achieved by means of partitions or barriers (metallic or non-metallic), insulation of live parts or the integral housing of a device e.g. moulded case circuit breaker. Main Criteria Subcriteria Form No internal separation Form 1 Separation of from the functional units Separation of from the functional units and Separation of terminals for external conductors from the functional units, but not from those of other functional units Separation of from all functional units and Separation of terminals for external conductors associated with a functional unit from those of any other functional unit and the conductors not separated from conductors not separated from conductors in the same compartment as the associated functional unit conductors not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments 4.0 Section: Rev. no. Approved By: Made By: Date: PEB RO'C 07/02/12

Symbols used in IEC 60 439-1 figures from Annexe D and drawings from Log Cad system. Symbols used in IEC 61 439-2 figures from Annexe AA and drawings from Log Cad system.

3 Symbols used in IEC figures from Annexe D and drawings from Log Cad system. Symbols used in IEC figures from Annexe AA and drawings from Log Cad system. Internal Components Busbars, including distribution Terminal(s) for external conductors Enclosure Internal separation Functional unit Logstrup Indication of Form Separation Logstrup Indication for External Terminal The following are typical forms of separation by partitions: FORM 1 No internal separation. FORM 2 Separation of from the functional units. FORM 2A conductors not separated from. FORM 2B. 07/02/12 RO'C PEB

FORM 3 Separation of from the functional units and Separation of terminals for external conductors from the functional units, but not from those of other functional units.

4 FORM 3 Separation of from the functional units and Separation of terminals for external conductors from the functional units, but not from those of other functional units. (Fixed or Withdrawable) FORM 3A conductors not separated from. (Fixed or Withdrawable) FORM 3B. FORM 4 Separation of from all functional units and Separation of terminals for external conductors associated with a functional unit from those of any other functional unit and the. FORM 4A conductors in the same compartment as the associated functional unit. FORM 4B conductors not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments. (Fixed or Withdrawable) 5.1 Section: Rev. no. Approved By: Made By: Date: PEB RO'C 07/02/12 The form of separation and higher degrees of protection shall be subject to an agreement between the manufacturer and the user.

5 The UK National annex to BS EN The Internal separation of assemblies by barriers or partitions is specified in 7.7, and is subject to agreement between the manufacturer and the user. The table below gives additional information regarding different types of construction, based on typical practice in the United Kingdom. Other types of construction are not precluded, and it is not essential to adopt any of the listed types in order to comply with the requirements of this British Standard. However, in order to achieve agreement between manufacturers and users, it is recommended to adopt any of the listed types of construction. Forms of separation Main criteria Sub-criteria Form Type of construction No separation Form 1 Separation of from the functional units. conductors not separated from. conductors separated from. Type 1 Busbar separation is achieved by insulated covering, e.g. sleeving, Type 2 Busbar separation is by metallic or Separation of from the functional units and separation of all functional units from one another. Separation of the terminals for external conductors from the functional units, but not from each other. conductors not separated from conductors separated from Type 1 Busbar separation is achieved by insulated coverings, e.g. sleeving, Type 2 Busbar separation is by metallic or Separation of from the functional units and separation of all functional units from one another, including the terminals for external conductors which are an integral part of the functional unit. conductors in same compartment as associated functional unit. Type 1 Busbar separation is achieved by insulated coverings, e.g. sleeving, Cables may be glanded elsewhere. Type 2 Busbar separation is by metallic or Cables may be glanded elsewhere. Type 3 Busbar separation is by metallic or The termination for each functional unit has its own integral glanding facility. conductors not in the same compartment as the associated functional unit, but in individual, separate, enclosed protected spaces or compartments Type 4 Busbar separation is achieved by insulated coverings, e.g. sleeving, Cables may be glanded elsewhere. Type 5 Busbar separation is by metallic or Terminals may be separated by insulated coverings and glanded in common cabling chamber(s). Type 6 All separation requirements are by metallic or non-metallic rigid barriers or partitions.cables are glanded in common cabling chamber(s). Type 7 All separation requirements are by metallic or non-metallic rigid barriers or partitions. The termination for each functional unit has its own integral glanding facility. 07/02/12 RO'C PEB

6 Form 1 Form 1 No internal separation Separation of from the functional units. Terminals NOT separated from. 1 & 2 Separation of from the functional units. Terminals separated from. Type 1: Busbar separation by insulated coverings e.g sleeving, wrapping or coatings. Type 2: Busbar separations by metallic or non metallic rigid barriers or partitions. Separation of from the functional units. Separation of functional units from one another. Separation of terminals from functional units but not from each other. Terminals NOT separated from 1 & 2 Separation of from the functional units. Separation of functional units from one another. Separation of terminals from functional units but not from each other. Terminals separated from. Type 1: Busbar separation by insulated coverings e.g sleeving, wrapping or coatings. Type 2: Busbar separations by metallic or non metallic rigid barriers or partitions. Symbol keys Internal Enclosure Busbar Functional units cable separation including terminals glands for external conductors 5.3 Section: Rev. no. Approved By: Made By: Date: PEB RO'C 07/02/12

7 1 & 2 Separation of from the functional units. Separation of functional units from one another. Separation of terminals of functional units Terminals in same compartment as functional unit. Type 1: Busbar separation by insulated coverings e.g sleeving, Cables glanded elsewhere. Type 3 Type 2: Busbar separations by metallic or non metallic rigid barriers or partitions. Cables glanded elsewhere. Type 3: All separation by metallic or non metallic rigid barriers or partitions. The terminals for each functional unit have their own integral glanding facility. 4,5 & 6 Separation of from the functional units. Separation of functional units from one another. Separation of terminals of functional units Terminals NOT in same compartment as functional unit. Type 4: Busbar separation by insulated coverings e.g sleeving, Cables glanded elsewhere. Type 5: Busbar separations by metallic or non metallic rigid barriers or partitions.terminals separated by insulated coverings. Cables glanded in common cabling chamber. Type 6: All separation by metallic or non metallic rigid barriers or partitions. Cables glanded in common cabling chamber. Type 7 Type 7: All separation by metallic or non metallic rigid barriers or partitions. The terminals for each functional unit have their own integral glanding facility. Symbol keys Internal Enclosure Busbar Functional units cable separation including terminals glands for external conductors 07/02/12 RO'C PEB

BETA Protecting. Low-Voltage Fuse Systems. LV HRC fuse links. 3/36 Siemens ET B1 2008

BETA Protecting. Low-Voltage Fuse Systems. LV HRC fuse links. 3/36 Siemens ET B1 2008 LV HRC fuse links Overview LV HRC fuses are used for installation systems in non-residential, commercial and industrial buildings as well as in switchboards of power supply companies. They therefore protect