LINETRAXX® NGRM700

  • Comprehensively configurable
  • Designed for easy retrofit
  • Multilingual user interface
  • Can operate on systems 5000 m above sea level without derating

The NGRM700 is an advanced device that allows continuous NGR monitoring to provide all necessary information of the system grounding.

The NGRM700 monitors the resistance value of the Neutral Grounding Resistor (NGR) and the fault current flowing through the NGR in High Resistance Grounded (HRG) systems. The ideal relay to protect HRG systems and to provide a comprehensive overview. The relay can be connected to the supervision system or directly to the communication network.

The NGRM700 allows the user to meet local requirements.

Questions? Contact us!

NGRM
NGRM
  • Comprehensively configurable
  • Designed for easy retrofit
  • Multilingual user interface
  • Can operate on systems 5000 m above sea level without derating

The NGRM700 is an advanced device that allows continuous NGR monitoring to provide all necessary information of the system grounding.

The NGRM700 monitors the resistance value of the Neutral Grounding Resistor (NGR) and the fault current flowing through the NGR in High Resistance Grounded (HRG) systems. The ideal relay to protect HRG systems and to provide a comprehensive overview. The relay can be connected to the supervision system or directly to the communication network.

The NGRM700 allows the user to meet local requirements.

Questions? Contact us!

Features

  • Determination of RNGR with passive and active measurement methods
  • Continuous monitoring of the RNGR even if the installation is de-energised;
  • Alarm or trip on ground fault
  • Monitoring of the current INGR
  • Monitoring of the voltage UNGR
  • Phase-to-ground fault indication (optional; up to 690 V direct coupling, otherwise via potential transformers)
  • Ethernet communication
  • Web server
  • Language selection (German, English GB and US, Spanish, French)
  • Test button (internal, external) with/without tripping
  • FFT analysis of the measuring signals
  • Pulser for manual ground fault location
  • Relay for detection of ground faults and resistor faults
  • Relay for shutdown of the installation after a configurable time
  • Can be combined with RCMS… for automatic shutdown of feeders
  • Graphical user interface
  • Wide supply voltage range (24 to 240 Vac/Vdc)
  • Range of use up to 5000 m AMSL
  • Fault/History memory
  • Analogue output of measured values (0…10 V, 4…20 mA, etc., selectable parameters)
  • Detachable HMI for door mounting
  • Password protection
  • Tripping on RMS, fundamental component signal or harmonics
  • Detection of AC and DC ground faults

LINETRAXX® NGRM700 Variant(s)

TypeSupply voltage US / Frequency range HzArt. No.
NGRM700AC 24…240 V, 40…70 Hz
DC 24…240 V		B94013700

Optional Accessories for LINETRAXX® NGRM700

CD-series coupling device

TypeVoltage UsysArt. No.
CD1000400…690 VB98039010
CD1000-2400…1000 VB98039053
CD50001000…4200 VB98039011
CD144004300…14550 VB98039054
CD2500014551…25000 VB98039055

Measuring current transformer

TypeVoltage/CurrentArt. No.
CTAC35
CTAC60
CTAS50
CTAS80
CTAS120		AC up to 30 AB98110007
B98110017
B98110009
B98110010
B98110011
CTUB103-CTBC35AC/DC up to 10 AB78120030
CTUB103-CTBC60
CTUB103-CTBC120		AC/DC up to 25 AB78120031
B78120032
CTB31…CTB51 seriesAC > 30…1000 AB980860xx

Voltage supply for measuring current transformers CTUB103…

Typemax. connected measuring current transformersArt. No.
STEP-PS/1 AC/24 DC/0.52B94053110
STEP-PS/1 AC/24 DC/1.757B94053111
STEP-PS/1 AC/24 DC/4.217B94053112

Downloads for LINETRAXX® NGRM700

CategoryNameSizeLanguageTimestampD-/B-Number
CE Declarations of conformity NGRM 88.5 KB 2023/05/03 09:41:4903.05.2023 09:41:49
Flyer NGR Product Comparison 630.6 KB EN2022/07/18 16:05:0218.07.2022 16:05:02
Quickstarts NGRM700/NGRM750 1.1 MB DE2022/12/02 11:08:2902.12.2022 11:08:29D00292
Quickstarts NGRM700/NGRM750 1.4 MB EN2022/12/02 11:08:3102.12.2022 11:08:31D00292
Datasheets NGRM700/NGRM750 1.0 MB DE2023/07/31 07:37:3231.07.2023 07:37:32D00292
Datasheets NGRM700/NGRM750 1.0 MB FR2023/07/31 07:38:5731.07.2023 07:38:57D00292
Datasheets NGRM700/NGRM750 1.0 MB EN2023/07/31 07:38:0731.07.2023 07:38:07D00292
Datasheets NGRM700/NGRM750 1.0 MB ES2023/07/31 07:38:3931.07.2023 07:38:39D00292
Manuals NGRM700/NGRM750 6.4 MB DE2022/12/02 11:07:2902.12.2022 11:07:29D00292
Manuals NGRM700/NGRM750 5.3 MB EN2022/12/02 11:07:5502.12.2022 11:07:55D00292
Technical information NGRM700 Guideform Specification (US) 141.8 KB EN2020/04/30 18:55:5630.04.2020 18:55:56
Technical information NGRM700 Guideform Specifications 159.5 KB ES2020/05/22 14:12:3022.05.2020 14:12:30
Manuals NGRM…-Modbus 453.9 KB DE2022/06/09 10:45:4109.06.2022 10:45:41D00292
Manuals NGRM…-Modbus 443.2 KB EN2022/06/09 10:47:4409.06.2022 10:47:44D00292
Manuals NGRM…-Modbus 463.4 KB ES2022/06/09 10:49:2509.06.2022 10:49:25D00292
Technical information How to Size an NGR (US) 424.0 KB EN2019/05/13 10:31:3513.05.2019 10:31:35
Technical information How to size an NGR (ES) 426.7 KB ES2021/05/26 11:31:0926.05.2021 11:31:09
Technical information NGR Checklist (US) 245.3 KB EN2022/11/07 16:39:0207.11.2022 16:39:02
Technical information Guideline on NGR/Safety Ground Monitoring 234.7 KB EN2019/09/20 13:52:3320.09.2019 13:52:33
Technical information Guideline on NGRM Relay Testing 522.3 KB EN2021/10/26 18:41:5226.10.2021 18:41:52
Application brochures System Grounding in the Americas, Australia, South Africa and Other Regions 576.7 KB EN2019/05/13 10:29:2213.05.2019 10:29:22
Product Brochures HRG & LRG Systems (US) 5.2 MB EN2020/03/05 21:02:3305.03.2020 21:02:33
Flyer Neutral Grounding Resistor Monitors (US) 343.7 KB EN2020/03/23 17:32:0023.03.2020 17:32:00
Product Brochures Mining 11.7 MB ES2020/05/22 14:37:3122.05.2020 14:37:31