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3.4 Electromagnetic compatibility
As required by the German Electromagnetic Compatibility Act (EMVG), electromagnetic compatibility is
essential to ensure immunity to external electromagnetic fields and conducted interference. Furthermore, the
emission of electromagnetic fields and line-conducted interference during brake operation must be
minimised. Since the brake features depend on the circuitry and operation, a declaration of conformity with
the applicable EMC standard can only be furnished for the wiring type, but not for a specific brake. The
76 ..P..B00 series of spring-applied single-disc brakes are designed for industrial applications to which the
following EMC standards apply: Generic Immunity Standard VKE 0839, part 6-2 (EN 61000-6-2), and
Generic Emission Standard VDE 0839, part 81-2 (EN 50081-2). Other applications may be subject to
different generic standards which must be considered by the manufacturer of the overall system. The
requirements in terms of electromagnetic compatibility of devices and components are determined by basic
standards derived from the generic standards. Brake wiring recommendations will be provided in the
following sections to ensure compliance with the individual basic standards that are relevant for industrial
brake use and other applications. Please refer to the specification sheets for additional information on
electromagnetic compatibility, especially with respect to the recommended electronic rectifiers specified in
Section 3.3.
Immunity according to EN 61000-4:
EN 61000-4-2 Electrostatic discharge:
The spring-applied single-disc brakes in the 76 ..P..B00 series comply at least with severity level 3 without
requiring additional measures. The built-in rectifier conforms to severity level 3 without additional measures.
EN 61000-4-3 Electromagnetic fields:
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.
EN 61000-4-4 Fast transients (burst):
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.
EN 61000-4-5 Surge:
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.
EN 61000-4-9 Pulse magnetic fields, EN 61000-4-10 Damped oscillatory magnetic fields:
Since the operating magnetic fields of the electromagnetic brakes are stronger many times over than
interference fields, the brake function will remain unaffected. The brakes comply at least with severity level 4.
The built-in rectifier conforms to severity level 3 without additional measures.
EN 61000-4-11 Voltage dips, short interruptions, and short supply voltage variations:
a)
Voltage interruptions:
Brakes that comply with the requirements of DIN VDE 0580 are de-energised after the specified
switching times at the latest. The switching time depends on the control and mains conditions (e.g.
generator effect of running down motors). Voltage interruptions of shorter duration than the response
delay specified by DIN VDE 0580 will not cause any malfunctions. The user must ensure that any
damage is avoided (e.g. motor start-up before the brake has been released caused by phase failure in
the case of two-phase energised motors or by the slipping of an electromagnetically engaged system
due to torque drop). The functional reliability of the electromagnetic brake and its electronic accessories
remains unaffected provided that any damage is avoided.
b)
Voltage dips and short supply voltage variations:
Electromagnetically released systems:
Voltage dips and supply voltage variations to below 60% of the rated voltage and lasting longer than the
response delay specified by DIN VDE 0580 may cause the brake to be de-energised temporarily.
Damage as described under a) above must be avoided by the user by taking adequate precautions.
Electromagnetically engaged systems:
Voltage dips and supply voltage variations to below the minimum tolerance threshold will cause torque
reductions. The user is required to take adequate precautions to avoid consequential damage.
Kendrion Binder Magnete GmbH
Operating Instructions 76 ..P..B00
Last updated: 30 Dec. 2009
Page 14
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