Solutions for data centers and IT

Data centers and IT

The power supply in data centers and IT departments must have a high level of availability.  Even very short power outages, in the millisecond range, may cause major damage. In addition, network loads from the harmonics of modern consumers, EMC faults or overloaded neutral conductors and associated fire hazards may lead to significant problems. Besides this, the activation of residual-current protective devices needs to be avoided by preventive monitoring. Unnecessary disturbances and interruptions can be reliably prevented with the right system solutions through early warnings and the benefit of information.

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Locating current injector RR 5886

• Insulation troubleshooting in DC, AC and mixed IT systems in connection with the insulation fault locator RR 5887 according to DIN EN 61557-9 (VDE 0413-9):2009 and DIN EN 61557-1 (VDE 0413-1)
• Insulation coordination according to IEC 60664-1
• External control via insulation monitor possible
• Positive and negative test current to monitor DC networks and networks with simultaneous alternating current and direct current portions present
• RS-485 bus connection to synchronise the test current analysis and optionally for the connection to the EDS measuring bus
• Control via insulation monitor via RS-485 bus or external control input possible
• Pushbutton for manual test current output
• Terminal connection for automatic test current output
• Status output of insulation fault detection via external switching output
• Width: 105 mm

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Insulation monitor RN 5897/010

• Insulation monitoring according to IEC/EN 61557-8
• With connection facility of an external coupling device RP 5898
for voltages up to 1000 V
• Trigger output for insulation fault locating system
• 2 separate adjustable response thresholds
(using e.g. for pre-Alarm and Alarm)
• Setting range of 1st response value (Pre-Alarm): 20 kΩ … 2 MΩ
• Setting range of 2nd response value (Alarm): 1 kΩ … 250 kΩ
• 2 changeover contacts für insulation failures-Pre-Alarm and -Alarm
• Energized or de-energized on trip can be selected for indicator relay
• Display for indication of measured value, device parameters and
device status
• Setting the maximum leakage capacitance to shorten the response time
• Automatic and manual device self-test
• Alarm storage selectable
• Protection against manipulation by sealable transparent cover
• External control input for combined Test-/Reset-button
• 3 wide voltage input for auxiliary voltage
• Width 52.5 mm

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Insulation fault locator RR 5887

• Insulation troubleshooting in DC, AC and mixed IT systems in connection with the locating current injector RR 5886 according to DIN EN 61557-9 (VDE 0413-9):2009 and DIN EN 61557-1
(VDE 0413-1)
• Insulation coordination according to IEC 60664-1
• Connection of max. 4 or 8 differential current transformers depending on the design
• RS-485 bus connection to synchronise the test current output and optionally for the connection to the EDS measuring bus for reading insulation fault currents
• Status output of insulation fault detection via external switching output
• Memory characteristics adjustable via bridge Y1-Y2
• Collective signalling relay to output preliminary warning and alarm states
• Pushbutton for manual reset of alarm states as well as testing of differential current transformers and their calibration
• Terminal connection for the storage of alarm states
• Width: 105 mm

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Residual current monitor, Type B RN 5883

• According to IEC/EN 62 020, VDE 0663
• For AC and DC systems Type B, according to IEC/TR 60755
• To detect earth faults in grounded voltage systems
• 4 setting ranges from 10 mA to 3 A
• Manual reset, with alarm and pre-warning
• With adjustable switching delay
• Energized or de-energized on trip
• LED indicator for operation, pre-alarm and alarm
• With test function
• LED-chain indicates fault current
• As option with analogue output
• Broken wire detection
• Width: 52.5 mm

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Insulation monitor LK 5894

• Insulation monitoring according to IEC/EN 61557-8
• Detection of symmetric and asymmetric insulation faults
• 2 changeover contacts
• Prewarning threshold setting range: 20 kΩ ... 2 MΩ
• Alarm threshold setting range: 1 kΩ ... 250 kΩ
• Energized or de-energized on trip can be selected for output relay
• Setting the maximum leakage capacitance to shorten the response time
• Simple, clearly arranged adjustment of the device with screwdriver
• LED chain to indicate the current insulation resistance
• Display of active measuring circuits
• Automatic and manual device self-test
• Width: 90 mm

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Insulation monitor UH 5892

• Insulation monitoring according to IEC/EN 61557-8
• Detection of symmetric and asymmetric insulation faults
• 1 changeover contact for alarm
• Fixed response value RAN: 50 kΩ, other on request
• Internal reset and test pushbutton
• External test and reset pushbutton can be connected
• LED indicator for auxiliary voltage and alarm
• LED chain to indicate the current insulation resistance
• Automatic or manual reset, programmable
• Analogue output for insulating value
• External indicating instrument can be connected
• Closed circuit operation
• Open circuit operation on request
• With pluggable terminal blocks for easy exchange of devices
- with screw terminals
- or with cage clamp terminals
• Width 45 mm

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Solid state contactor BF 9250

• According to IEC/EN 60 947-4-2, IEC/EN 60 947-4-3
• 1-, 2- and 3-pole models
• Load current up to 50 A
• For AC load up to 480 V
• Switching at zero crossing
• Protected by varistors
• As option temperature protection of the power semiconductors
with monitoring output
• Mounting on DIN-rail
• As option with control input X1 with low current consumption
e.g. to be controlled by a PLC
• As option up to 3 separate semiconductor contactors in one unit
• BF 9250: width 22.5 mm, 45 mm and 90 mm
BH 9250: width 45 mm, 67.5 mm and 112.5 mm

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