EN 50205:2002 standard - Relays with forcibly guided (mechanically linked) contacts

Relays with forcibly guided (mechanically linked) contacts

Scope:

This standard applies to all-or-nothing relays with forcibly guided (linked) contacts. The intention of this standard is
to define stadardized requirements and tests for forcibly guided (linked) operation.
Existing standards dealing with all-or-nothing relays maintain their validity. The requirements of this standard apply in addition to the existing standards wherever the all-or-nothing relays are equipped with forcibly guided (linked) contacts.

Relais mit (mechanisch) zwangsgeführten Kontakten

Introduction

This Standard applies to elementary relays in which special design and constructional measures are used to ensure that make (normally-open) contacts can not assume the same state as break (normally-closed) contacts. These relays can be used in selfmonitoring control systems, e.g. safety-related control systems.
1 Scope

This European Standard specifies special requirements and tests for elementary relays with forcibly guided contacts, also known as mechanically linked contacts. These special requirements apply in addition to the general requirements of EN 61810-1, EN 61810-5, EN 116000-3 and EN 60255-23.

• NOTE 1 This standard does not apply to electromechanical control circuit devices as described in IEC/EN 60947-5-1.
• NOTE 2 EN 116000-3 is nearly equivalent to IEC 61810-7.

2 Normative references

This European Standard incorporates? by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies.

• EN 60255-23 Electrical relays - Part 23: Contact performance
• EN 60947-5-1 Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices
• EN 61810-1 Electromechanical non-specified time all-or-nothing relays - Part 1: General requirements
• EN 61810-5 Electromechanical non-specified time all-or-nothing relays - Part 5: Insulation coordination
• EN 116000-3 Generic specification: Electromechanical all-or-nothing relays - Part 3: Test and measurement procedures