The NGRM500 Neutral Grounding Resistor Monitor detects grounding-resistor failures and ground faults. It is intended for use in high-resistance grounded transformers and generators used in commercial and industrial power systems. In these systems, the NGRM500 monitors:
The NGRM500 can display the measured values, including current and voltage harmonics on the human machine interface (HMI). Users are able to select filters for ground-fault current and NGR voltage to prevent nuisance operation in noisy applications. A benefit to many users is the multilingual user interface that allows the comfort of reading values and programming in your native language.
It is a compact design with DIN rail mounting making it easy to retrofit into existing HRG applications or factory-install in new HRG packages. If customers prefer, they can easily program the relay via the built-in webserver. NGRM500’s can easily connect to a supervisory system with Modbus TCP/IP or RTU communications. Capabilities extend to 25 kV and 100 A.
The NGRM500 allows the user to meet Canadian requirements. It can be used to perform the functions required by Rule 10-302, Use of Impedance Grounded Systems, of the CE Code, C22.1-18, Section 10, Grounding and Bonding.
The NGRM500 Neutral Grounding Resistor Monitor detects grounding-resistor failures and ground faults. It is intended for use in high-resistance grounded transformers and generators used in commercial and industrial power systems. In these systems, the NGRM500 monitors:
The NGRM500 can display the measured values, including current and voltage harmonics on the human machine interface (HMI). Users are able to select filters for ground-fault current and NGR voltage to prevent nuisance operation in noisy applications. A benefit to many users is the multilingual user interface that allows the comfort of reading values and programming in your native language.
It is a compact design with DIN rail mounting making it easy to retrofit into existing HRG applications or factory-install in new HRG packages. If customers prefer, they can easily program the relay via the built-in webserver. NGRM500’s can easily connect to a supervisory system with Modbus TCP/IP or RTU communications. Capabilities extend to 25 kV and 100 A.
The NGRM500 allows the user to meet Canadian requirements. It can be used to perform the functions required by Rule 10-302, Use of Impedance Grounded Systems, of the CE Code, C22.1-18, Section 10, Grounding and Bonding.
Type | Supply voltage US / Frequency range Hz | Art. No. |
---|---|---|
NGRM500 | AC 48…240 V, 40…70 Hz DC 48…240 V | B94013500 |
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. |
---|---|---|
W20 | AC up to 10 A | B98080003 |
W35 W60 W0-S20 W1-S35 W2-S70 | AC up to 25 A | B98080010 B98080018 B911787 B911731 B911732 |
CTUB103-CTBC35 | AC/DC up to 10 A | B78120030 |
CTUB103-CTBC60 CTUB103-CTBC120 | AC/DC up to 25 A | B78120031 B78120032 |
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 |
Category | Name | Size | Language | Timestamp | D-/B-Number |
---|---|---|---|---|---|
Flyers | NGR Product Comparison | 630.6 KB | EN | 2022/07/18 16:05:0218.07.2022 16:05:02 | |
CE Declarations of Conformity | NGRM | 88.5 KB | 2023/05/03 09:41:4903.05.2023 09:41:49 | ||
Manuals | NGRM…-Modbus | 443.2 KB | EN | 2022/06/09 10:47:4409.06.2022 10:47:44 | D00292 |
Technical Information | How to Size an NGR (US) | 424.0 KB | EN | 2019/05/13 10:31:3513.05.2019 10:31:35 | |
Quickstarts | NGRM500/NGRM550 | 1.5 MB | EN | 2022/12/02 11:08:2802.12.2022 11:08:28 | D00373 |
Manuals | NGRM500/NGRM550 | 5.4 MB | EN | 2022/12/02 11:07:5302.12.2022 11:07:53 | D00373 |
Technical Information | NGRM500 Guideform Specification (US) | 141.3 KB | EN | 2020/04/30 18:55:2730.04.2020 18:55:27 | |
Technical Information | NGR Checklist (US) | 245.3 KB | EN | 2022/11/07 16:39:0207.11.2022 16:39:02 | |
Technical Information | Guideline on NGR/Safety Ground Monitoring | 234.7 KB | EN | 2019/09/20 13:52:3320.09.2019 13:52:33 | |
Technical Information | NGRM500 Retrofit Guide (US) | 1.3 MB | EN | 2021/02/10 20:59:2210.02.2021 20:59:22 | |
Technical Information | Guideline on NGRM Relay Testing | 522.3 KB | EN | 2021/10/26 18:41:5226.10.2021 18:41:52 | |
Product Brochures | HRG & LRG Systems (US) | 5.2 MB | EN | 2020/03/05 21:02:3305.03.2020 21:02:33 | |
Flyers | Neutral Grounding Resistor Monitors (US) | 343.7 KB | EN | 2020/03/23 17:32:0023.03.2020 17:32:00 | |
Datasheets | NGRM500/NGRM550 | 1.2 MB | EN | 2023/03/16 11:56:2516.03.2023 11:56:25 | D00373 |
Flyers | NGRM550 & NGRM750 | 630.6 KB | EN | 2022/05/25 06:07:5225.05.2022 06:07:52 |