How do you maintain surveillance equipment
Residual current monitoring (RCM) for server rooms
- Residual current monitoring
DIN VDE 0105-100: 2009-10 for the operation of electrical systems (126.96.36.199.4) specifies: "For systems that are subject to an effective management system for preventive maintenance and servicing during normal operation, the recurring tests by the adequate implementation of permanent monitoring and maintenance of the system and all of its equipment are replaced by qualified electricians. Appropriate evidence must be available. "
The RCM technology uses this exception rule. Residual current monitoring devices (so-called RCM - Residual Current Monitor) are able to record fault and differential currents from 5mA. Through continuous / permanent monitoring with an RCM, the shutdown of a system or machine can be avoided and the Testing effort minimized become. Measurement protocols from the RCMs can be submitted as proof of the insulation level in the course of a repeat test. In addition to the 100% availability of the system, which is guaranteed by an RCM, there are other advantages such as operational and system security, cost security, error security and legal security.
The Association of Property Insurers recommends the use of RCM:
"For electrical systems to be newly built, TN-S systems must therefore be planned and installed in accordance with DIN VDE 0100-444. For existing TN-C systems, conversion to a TN-S system is recommended. TN-S systems are to be implemented as soon as possible from the feed-in (transfer point). In order to guarantee the functionality of a TN-S system in the long term (no neutral and PE conductor connection), monitoring by a residual current monitoring device (RCM) is recommended. " (see VdS 2349-1)
Find suitable residual current monitoring devices for the server room
In data centers or server rooms, residual current monitoring devices (RCM) from Type B according to EN 62020 can be used. In addition to sinusoidal AC residual currents and pulsating DC residual currents, they also record smooth DC residual currents (= AC / DC sensitive residual current monitoring devices).
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