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Preventive fire protection in building installation

Especially in the field of industrial and building systems, fault currents in building installations, in technical systems or in machinery itself are the most common cause of fire.

What is the reason for this?

Inadequate insulation due to mechanical damage of power supply cables or brittle insulation of devices and lamps due to constant heating result in insulation faults which are one of the most common fire sources. But also low insulation resistance as a result of humidity and dirt increases the risk of fire. The consequences of insulation faults are serious. They not only imply an increased fire hazard, which poses a considerable danger to people, the environment and property values. Expensive system downtimes, data loss and disturbances in computer systems and communications equipment as well as unplanned and expensive maintenance work are further consequences of insulation faults.

What should you do?

Preventive fire protection is becoming the key issue in the field of company security, because operational interruptions and damage to property due to fire incidences can threaten the companies' existence. No company can afford this. Therefore, all persons responsible for electrical safety should place enormous demands on preventive fire protection.

In order to effectively address the fire protection problem in electrical installations, continuous monitoring for residual currents of essential installations or installation parts and devices is the method of choice. For this purpose, residual current monitors or residual current monitoring systems are to be installed in addition to existing protective devices.

DIN VDE 0100-530 (VDE 0100-530):2018-06 "Erection of low voltage electrical installations – Part 530: Selection and erection of electrical equipment – Switchgear and control gear" comments

1. In section “532 Equipment for protection against fire risks”: “If in specific application cases a residual current device (RCD) in accordance with 531.3.4.1 cannot be used, because the operational current of the circuit to be protected is greater than the greatest rated current of a residual current device (RCD), for example, it is recommended to apply the following measures: “Use of residual current monitors (RCMs) according to DIN EN 62020 (VDE 0663) together with circuit breakers if their supply voltage is isolated from the supplying system.”
2. In section “532.3 Residual current monitors (RCMs) for protection against fire risks in IT systems”: “Instead of residual current protective devices (RCDs), residual current monitors (RCMs) can be used in IT systems, provided that the area is monitored by electrically skilled persons. Residual current monitors (RCMs) must be in compliance with DIN EN 62020 (VDE 0663) and must be operated in combination with a switching device suitable for isolation. Residual current monitors (RCMs) must be installed at the beginning of the final circuit. The residual operating current must not exceed 300 mA.”
3. In section “532.4 Insulation monitoring devices (IMDs) for protection against fire risks in IT systems” the use of insulation monitoring devices according to DIN EN 61557-8 and insulation fault location systems according DIN EN 61557-9 is recommended. RCMs with a residual operating current of 300 mA are required by the DIN VDE 0100-482 standard for locations prone to fire hazards.

Continuous residual current monitoring with Bender RCM technology means:

  • Detecting potential fire hazards due to high fault currents when they are developing
  • Preventive safety for the protection of man and machine
  • A high level of operational reliability and availability of the technical installations and communication equipment
  • Immediate notification of insulation deteriorations instead of random tests
  • Avoiding expensive system downtimes
  • No unplanned or expensive maintenance work
  • Significant reduction of maintenance and operating costs

What are your benefits?

Preventive fire protection by continuous residual current monitoring or insulation monitoring does not only mean preventive safety for the protection of man and machine against the hazards of electric current, but also high operational reliability and availability of technical installations by immediate detection and elimination of insulation faults. This allows maintenance and operating costs to be considerably reduced. The risk of failure due to unexpected operation of existing protective devices can also be reduced to a minimum.

By monitoring the residual current of systems and devices in electrical installations an insulation deterioration becomes visible immediately and can be signalled. Instead of random testing of the insulation value at long intervals, the high insulation resistance of the installation in accordance with the requirements of the German Social Accident Insurance (DGUV) Regulation 3 and the Ordinance on Industrial Safety (BetrSichV) can be maintained by means of continuous monitoring.

Furthermore, an important condition for the work of precautionary fire protection by the local fire brigades can be met.

In environments where an RCD cannot be used for technical reasons, RCMs meet the normative requirements and are in compliance with the Low Voltage Directive.In the event of damage, you are in a legally secure position.

You meet and exceed the directives for damage prevention of property insurers (VdS) and possibly reduce your insurance premiums.

For further information, see VdS Schadenverhütung GmbH directives (only available in German language) :
VdS 2033 - Elektrische Anlagen in feuergefährdeten Betriebsstätten und diesen gleichzustellende Risiken Richtlinien zur Schadenverhütung
VdS 2349-1 - Auswahl von Schutzeinrichtungen für den Brandschutz in elektrischen Anlagen
VdS 3501 - Isolationsfehlerschutz in elektrischen Anlagen mit elektronischen Betriebsmitteln - RCD und FU, Richtlinien zur Schadenverhütung

 

Benefits at a glance

  • Preventive safety for the protection of man and machine, as potential fire risks caused by high fault currents are recognised when they are developing.
  • Significant reduction of maintenance and operating costs, since unplanned or expensive maintenance work is not necessary.
  • A high level of operational reliability and availability of technical installations and communication equipment, as expensive system downtimes are avoided.
  • Immediate notification of insulation deteriorations by continuous monitoring instead of random tests at long intervals
  • The insulation resistance of the electrical installation is kept at a high level in accordance with the requirements of BGV (German Accident Prevention Regulation).
  • Insurance premiums might be reduced, as the directives for damage prevention of property insurers are met or exceeded.

Downloads

CategoryNameSizeLanguageTimestampD-/B-Number
Flyer Wiederkehrende Prüfung nach DGUV Vorschrift 3 (BGV A3) 235.6 KB DE10.09.2020 05:02:42
Technical article Fachbeitrag: Brandschutz in Windkraftanlagen (2021) 208.8 KB DE26.05.2021 08:46:05
Technical article Fachbeitrag: Brandschutz in holzverarbeitenden Betrieben (2020) 366.7 KB DE07.06.2021 14:00:10
Technical article Fachbeitrag: Holz + Möbel Brandschutz (2020) 241.1 KB DE07.06.2021 14:00:11

Products

Residual current monitoring

LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

Details
LINETRAXX® RCMS460-L
LINETRAXX® RCMS460-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

Details
LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Details
LINETRAXX® RCMS490-L
LINETRAXX® RCMS490-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Details
LINETRAXX® RCMS150
LINETRAXX® RCMS150 series

AC/DC sensitive residual current monitor (type B) with 6 integrated measuring current transformers

Details
LINETRAXX® RCMB42…EC
LINETRAXX® RCMB42…

AC/DC sensitive residual current monitoring module for fault current monitoring of AC charging stations for electric vehicles

Details
MRCDB300-Serie
LINETRAXX® MRCDB300 series

AC/DC sensitive residual current monitoring modules for MRCD applications

Details
LINETRAXX® RCMB300-Serie
LINETRAXX® RCMB300 series

AC/DC sensitive residual current monitoring modules for monitoring applications

Details
RCMB330
LINETRAXX® RCMB330

AC/DC sensitive residual current monitoring module with integrated split-core measuring current transformer

Details
RCMB104
RCMB104

AC/DC sensitive residual current monitoring module for electric vehicle charging systems

Details
RDC104-4
RDC104-4

DC sensitive residual current monitoring module for electric vehicle charging systems

Details
MRCDB423
LINETRAXX® MRCDB423

Modular residual current device type B for additional protection (protection against indirect contact) in earthed systems (TN and TT systems)

Details
LINETRAXX® RCMA423

AC/DC sensitive residual current monitor for TN and TT systems (AC, DC, pulsed DC currents)

Details
LINETRAXX® RCMA420
LINETRAXX® RCMA420

AC/DC sensitive residual current monitor for TN and TT systems (AC, DC, pulsed DC currents)

Details
LINETRAXX® RCM420

Residual current monitor for TN and TT systems (AC and pulsed DC currents)

Details
RCMB121
benvac® RCMB121

AC/DC sensitive residual current monitoring for AC charge stations

Details
RCMB123
benvac® RCMB123

AC/DC sensitive residual current monitoring for AC charge stations

Details
RDC121
benvac® RDC121

DC sensitive residual current monitoring for AC charge stations

Details
RCMB13x
RCMB130 series

AC/DC sensitive residual current monitoring module for measuring AC and DC currents up to ±100 mA

Details

Insulation monitoring

ISOMETER® iso685…
ISOMETER® iso685…

Insulation monitoring device for inverter applications and large industrial plants

Details
ISOMETER® iso685…
ISOMETER® iso685-…-B

Insulation monitoring device for inverter applications and large industrial plants, variant for coupled systems

Details
ISOMETER® iso685-…-P
ISOMETER® iso685-…-P

Insulation monitoring device for inverter applications and large industrial plants, variant for coupled systems and insulation fault location

Details
ISOMETER® isoRW685W-D
ISOMETER® isoRW685W-D

Insulation monitoring device tailored to the requirements of railway rolling stock applications

Details
ISOMETER® isoRW685W-D-B
ISOMETER® isoRW685W-D-B

Insulation monitoring device especially for railway applications

Details
ISOMETER® isoNAV685-D
ISOMETER® isoNAV685-D

Insulation monitoring device with instantaneous tripping, frequency nominal system voltage 60 Hz

Details
ISOMETER® isoNAV685-D-B
ISOMETER® isoNAV685-D-B

Insulation monitoring device for offline monitoring of de-energised loads

Details
ISOMETER® isoHR685W-…-I-B
ISOMETER® isoHR685W

Insulation monitoring device for measuring high-resistance insulation resistances up to 10 GΩ and to monitor long parallel cable

Details
ISOMETER® IRDH575
ISOMETER® IRDH575

- This device series is in the discontinuation phase. -
Deliverable according to availability until 31.12.2023.

Details
ISOMETER® IRDH375
ISOMETER® IRDH375

- This device series is in the discontinuation phase. -
Deliverable according to availability until 31.12.2023.

Details
ISOMETER® IRDH275
ISOMETER® IRDH275

- This device series is in the discontinuation phase. -
Available until 31.12.2023.

Details
ISOMETER® IRDH275BM-7
ISOMETER® IRDH275BM-7 with AGH675S-7…

Device combination for insulation monitoring in medium-voltage systems

Details
ISOMETER® isoPV1685/isoPV1685PFR
ISOMETER® isoPV1685RTU/isoPV1685P

Insulation monitoring device for unearthed systems in photovoltaic installations up to AC 1000 V/DC 1500 V

Details
ISOMETER® isoHR1685DW–925
ISOMETER® isoHR1685DW–925

Insulation monitoring device for mobile, insulated elevating work platforms

Details
ISOMETER® iso1685DP-425/isoHV1685D-425/isoLR1685DP-325
ISOMETER® iso1685DP/isoHV1685D/isoLR1685DP

Insulation monitoring device for unearthed AC, AC/DC and DC power supplies (IT systems)

Details
ISOMETER® isoEV425 mit AGH420
ISOMETER® isoEV425 with AGH420

Insulation monitoring device for unearthed DC circuits for charging electric vehicles

Details
ISOMETER® isoCHA425

Insulation monitoring device for unearthed DC systems for the charging of electric vehicles acc. to Japanese charging standard CHAdeMO

Details
ISOMETER® isoCHA425HV mit AGH420-1
ISOMETER® isoCHA425HV with AGH420-1

Insulation monitoring device with coupling device for unearthed DC systems (IT systems) DC 0 V to 1000 V Suitable for DC charging stations according to CCS or CHAdeMO

Details
ISOMETER® isoRW425
ISOMETER® isoRW425

Insulation monitoring device for railway applications up to AC/DC 440 V

Details
ISOMETER® IR425-D4
ISOMETER® IR425-D4

Insulation monitoring device for unearthed AC/DC control circuits

Details
ISOMETER® isoUG425
ISOMETER® isoUG425

Insulation monitoring device for unearthed DC systems (IT systems) up to 120 V

Details
isoBAT425
ISOMETER® isoBAT425 with coupling impedance ZE420

Insulation monitoring device for batteries up to DC 400 V

Details
ISOMETER® IR427 mit MK7
ISOMETER® IR427 with MK7

Insulation monitoring device for medical IT systems

Details
ISOMETER® isoMED427P
ISOMETER® isoMED427

Insulation monitoring device with an integrated locating current injector for medical IT systems

Details
ISOMETER® IR420-D6
ISOMETER® IR420-D6

Offline monitor (earth fault lock-out) for monitoring de-energised loads in TN,TT and IT systems

Details
ISOMETER® IR423
ISOMETER® IR423

Insulation monitoring device for mobile generators

Details
ISOMETER® isoPV425 mit AGH420
ISOMETER® isoPV425 with AGH420

Insulation monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

Details
ISOMETER® IR420-D4
ISOMETER® IR420-D4

Insulation monitoring device for unearthed AC control circuits

Details
ISOMETER® isoES425
ISOMETER® isoES425

Insulation monitoring device for unearthed AC, AC/DC and DC systems (IT systems) for energy storage devices up to AC/DC 400 V

Details
ISOMETER® isoHV425 mit AGH422
ISOMETER® isoHV425 with AGH422

Insulation monitoring device for unearthed AC, AC/DC and DC systems (IT system)

Details
ISOMETER® isoGEN423
ISOMETER® isoGEN423

Insulation monitoring device for unearthed AC, AC/DC and DC systems (IT systems) up to 3(N)AC, AC 400 V, DC 400 V

Details
ISOMETER® iso415R
ISOMETER® iso415R

Insulation monitoring device for unearthed AC, AC/DC and DC main and control circuits

Details
ISOMETER® IR123P
ISOMETER® IR123P

Insulation monitoring device for mobile generators

Details
ISOMETER® IR155-3203 / IR155-3204
ISOMETER® IR155-3203/IR155-3204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

Details
ISOMETER® IR155-4203/IR155-4204
ISOMETER® IR155-4203/IR155-4204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

Details
ISOMETER® IR155-3210
ISOMETER® IR155-3210

Insulation monitoring device (IMD) for unearthed DC charging systems (IT systems) for electric vehicles

Details
ISOMETER® IR155-4210
ISOMETER® IR155-4210

Insulation monitoring device (IMD) for unearthed DC charging systems (IT systems) for electric vehicles

Details
ISOMETER® isoPV mit AGH-PV
ISOMETER® isoPV with AGH-PV

Insulation monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

Details
ISOMETER® IR1575
ISOMETER® IR1575…

Insulation monitoring device for unearthed systems up to 480 V

Details
ISOMETER® isoLR275 mit AGH-LR
ISOMETER® isoLR275 with AGH-LR

Insulation monitoring device for installations with a low-resistance insulation level

Details
ISOMETER® iso165C, iso165C-1

Insulation monitoring device (IMD) for unearthed DC drive systems (IT systems) in electric vehicles

Details

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