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.
- 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.
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)
| Type | Supply voltage US / Frequency range Hz | Art. No. |
|---|---|---|
| NGRM700 | AC 24…240 V, 40…70 Hz DC 24…240 V | B94013700 |
Optional Accessories for LINETRAXX® NGRM700
CD-series coupling device
| Type | Voltage Usys | Art. No. |
|---|---|---|
| CD1000 | 400…690 V | B98039010 |
| CD1000-2 | 400…1000 V | B98039053 |
| CD5000 | 1000…4200 V | B98039011 |
| CD14400 | 4300…14550 V | B98039054 |
| CD25000 | 14551…25000 V | B98039055 |
Measuring current transformer
| Type | Voltage/Current | Art. No. |
|---|---|---|
| CTAC35 CTAC60 CTAS50 CTAS80 CTAS120 | AC up to 30 A | B98110007 B98110017 B98110009 B98110010 B98110011 |
| CTUB103-CTBC35 | AC/DC up to 10 A | B78120030 |
| CTUB103-CTBC60 CTUB103-CTBC120 | AC/DC up to 25 A | B78120031 B78120032 |
| CTB31…CTB51 series | AC > 30…1000 A | B980860xx |
Voltage supply for measuring current transformers CTUB103…
| Type | max. connected measuring current transformers | Art. No. |
|---|---|---|
| STEP-PS/1 AC/24 DC/0.5 | 2 | B94053110 |
| STEP-PS/1 AC/24 DC/1.75 | 7 | B94053111 |
| STEP-PS/1 AC/24 DC/4.2 | 17 | B94053112 |
Downloads for LINETRAXX® NGRM700
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| NGRM700 | Product Brochures | 2.2 MB | EN | 2023/11/1313.11.2023 | |
| NGRM700 Update V4.00 | Software | 8.1 MB | 2024/04/2323.04.2024 | ||
| NGRM | CE Declarations of conformity | 88.5 KB | 2023/05/0303.05.2023 | ||
| NGR Product Comparison | Flyer | 630.6 KB | EN | 2022/07/1818.07.2022 | |
| NGRM700/NGRM750 | Quickstarts | 1.1 MB | DE | 2022/12/0202.12.2022 | D00292 |
| NGRM700/NGRM750 | Quickstarts | 1.4 MB | EN | 2022/12/0202.12.2022 | D00292 |
| NGRM700/NGRM750 | Datasheets | 1.0 MB | DE | 2023/07/3131.07.2023 | D00292 |
| NGRM700/NGRM750 | Datasheets | 1.0 MB | FR | 2023/07/3131.07.2023 | D00292 |
| NGRM700/NGRM750 | Datasheets | 1.0 MB | EN | 2023/07/3131.07.2023 | D00292 |
| NGRM700/NGRM750 | Datasheets | 1.0 MB | ES | 2023/07/3131.07.2023 | D00292 |
| NGRM700/NGRM750 | Manuals | 7.6 MB | DE | 2024/09/1818.09.2024 | D00292 |
| NGRM700/NGRM750 | Manuals | 7.6 MB | EN | 2024/09/1818.09.2024 | D00292 |
| NGRM700 Guideform Specification (US) | Technical information | 141.8 KB | EN | 2020/04/3030.04.2020 | |
| NGRM700 Guideform Specifications | Technical information | 159.5 KB | ES | 2020/05/2222.05.2020 | |
| NGRM…-Modbus | Manuals | 453.9 KB | DE | 2022/06/0909.06.2022 | D00292 |
| NGRM…-Modbus | Manuals | 443.2 KB | EN | 2022/06/0909.06.2022 | D00292 |
| NGRM…-Modbus | Manuals | 463.4 KB | ES | 2022/06/0909.06.2022 | D00292 |
| How to Size an NGR (US) | Technical information | 424.0 KB | EN | 2019/05/1313.05.2019 | |
| How to size an NGR (ES) | Technical information | 426.7 KB | ES | 2021/05/2626.05.2021 | |
| NGR Checklist (US) | Technical information | 245.3 KB | EN | 2022/11/0707.11.2022 | |
| Guideline on NGR/Safety Ground Monitoring | Technical information | 234.7 KB | EN | 2019/09/2020.09.2019 | |
| Guideline on NGRM Relay Testing | Technical information | 522.3 KB | EN | 2021/10/2626.10.2021 | |
| System Grounding in the Americas, Australia, South Africa and Other Regions | Application brochures | 576.7 KB | EN | 2019/05/1313.05.2019 | |
| HRG & LRG Systems (US) | Product Brochures | 3.6 MB | EN | 2024/01/0303.01.2024 | |
| Neutral Grounding Resistor Monitors (US) | Flyer | 343.7 KB | EN | 2020/03/2323.03.2020 |