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BENDER GmbH & Co KG
LINETRAXX® GM420

LINETRAXX® GM420

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LINETRAXX® GM420

Product catalog summary

Device Features

Monitors loop resistance of PE conductors in AC systems.
High resistance measuring circuit against extraneous voltages.
Adjustable start-up, response, and release delays.
Digital display with multi-functional LC display.
Preset function for automatic basic parameter setting.
LED indicators for power and alarms.
Continuous self-monitoring and internal test/reset button.
Two separate alarm relays with changeover contacts.
Password protection and sealable cover.
RoHS compliant.

Product Description

The GM420 series is designed to monitor the resistance of PE conductor connections in AC and de-energised systems. It displays the ohmic resistance and any extraneous voltage. Alarms are activated if resistance exceeds set values, with adjustable time delays for specific installations.

Typical Applications

Monitoring motors and PE conductor connections.
Monitoring earthing systems.

Functionality

Upon applying supply voltage, a start-up delay begins. The device has two adjustable measuring channels. Alarms are triggered if values exceed set thresholds, with relays switching after response delays. Fault memory can retain alarms until reset.

Technical Specifications

Insulation coordination: Rated insulation voltage of 400 V.
Supply voltage: Various options available.
Measuring circuit: Loop resistance range of 0-100 Ω, extraneous voltage range of 0-50 V.
Response values: Loop resistance adjustable from 0.1-100 Ω.
Time response: Adjustable delays for start-up, response, and release.
Displays: Multifunctional LC display for measured values.
Switching elements: Two changeover contacts with N/C or N/O operation.
Environmental conditions: Operating temperature from -25 to +55 °C.
Connection: Push-wire terminals with specific connection properties.

Ordering Information

Various models available with different supply voltage ranges. Accessories such as mounting clips are available separately.

Catalog excerpts

LINETRAXX® GM420 Loop monitoring relay to monitor loop resistances or PE conductor connections

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Loop monitoring relay to monitor loop resistances or PE conductor connections LINETRAXX* GM420 Product description The GM420 series loop monitor is designed to monitor the resistance of PE conductor connections in AC systems and in de-energised systems. The extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. The ohmic resistance of the conductor loop and the AC extraneous voltage Uf, if existing, will be indicated on the display. The currently measured value is continuously indicated on the LC display. If the measured resistance value increases above the set response...

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Loop monitor LINETRAXX® GM420 Wiring diagram Operating elements 1 - Power On LED "ON" (green); lights when supply voltage is applied and flashes in the event of system fault alarm 2 - Alarm LED "ALT (yellow), lights when the set response value > R, OL, > Uf, ERROR, TEST is exceeded and flashes in the event of system fault alarm 3 - Alarm LED "AL2" (yellow), lights when the value falls below the set response value > R, OL, > Uf, ERROR, TEST and flashes in the event of system fault alarm Arrow up button: To change the measured value display, move upwards in the menu or to change parameters. To...

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Loop monitor LINETRAXX® GM420 Z BENDER Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Displays, memory Rated insulation voltage 400 V Rated impulse voltage/pollution degree 4 kV/3 Protective separation (reinforced insulation) between: Display range, measuring value Rm Display range, measuring value Uf LC display, multifunctional, not illuminated Operating uncertainty, loop resistance 0.1 fi Operating uncertainty loop resistance 1.100 fi Operating uncertainty voltage in the range of 50/60 Hz Operating uncertainty voltage in the range of 42.460 Hz History memory (HiS) for the first alarm...

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Loop monitor LINETRAXX® GM420 Ordering information Open the front plate cover in direction of arrow! Screw mounting Note: The upper mounting clip must be ordered separately (see ordering information).

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BENDER Group GM420_D00112_01_D_XXEN / 06.2016 / pdf / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the version that was valid at the time of printing. Bender GmbH & Co. KG P.O. Box 1161 • 35301 Gruenberg • Germany Londorfer Strasse 65 • 35305 Gruenberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: [email protected] • w

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LINETRAXX® GM420

LINETRAXX® GM420

Catalog excerpts

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