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NGRM700 (HRG)NGRM750 (LRG)

NGRM700 (HRG)NGRM750 (LRG)
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NGRM700 (HRG) NGRM750 (LRG) Neutral Grounding Resistor Monitor

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Neutral Grounding Resistor Monitor Product description The NGRM700 is only intended for use in high-resistance grounded systems. The NGRM750 is only intended for use in low-resistance grounded systems. In these systems, the NGRM7… monitors • the current through the neutral grounding resistor (NGR), • the voltage between the star point of the transformer and ground (voltage drop across the NGR), • the condition of the neutral grounding resistor (NGR), • line-to-line and line-to-ground voltages. LINETRAXX® NGRM700 Device features • Determination of RNGR with passive and active measurement...

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NGR FAULT GROUND FAULT Display elements 1 - ON Operation LED, green; on when power supply is available 2The LC display shows device and measurement information. 3 - SERVICE The LED is on when there is either a device fault or a connection fault, and when the device is in maintenance mode. 4 - TRIPPED The LED is on when the trip relay has been tripped due to an NGR fault, ground fault or a device error. 5 - NGR FAULT The LED flashes in case of a prewarning: NGR fault detected, NGR-fault relay has tripped, trip relay has not tripped yet (tNGR trip elapses). The LED is on when an NGR fault has...

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Connection star connection: Usys ≤ 690 V For these voltages, the phase monitor of the NGRM7… can be connected directly to the phase conductors to be monitored. Circuit breaker L1 The “N” connection of the CD-series coupling device should be as close to the transformer star point as possible. Connection Star connection: Usys ≤ 690 V with pulser Circuit breaker L1 The “N” connection of the CD-series coupling device should be as close to the transformer star point as possible. An intermediate relay may be required between the power contactor of the pulser and the digital output at X1 of the...

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Connection star connection: Usys > 690 V For these voltages, the phase monitor of the NGRM7… can only be connected to the conductors to be monitored via potential transformers (PT). Circuit breaker Note: * PT ratio "primary: secondary" can be adjusted in the NGRM7…. The “N” connection of the CD-series coupling device should be as close to the transformer star point as possible Artificial neutral (delta connection): Connection with a zigzag transformer If no star point is available, the following circuit can create an artificial neutral. Circuit breaker L1 L2 L3

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Measuring current transformer connection Depending on the system to be monitored, a suitable measuring current transformer has to be chosen. All common measuring current transformers (50 mA or 5 A on the secondary side) can be used. The following table helps you with the choice: System type Transformation ratio Bender measuring current transformer Measuring range (see CTUB103 manual) 5 A 100:1 10 A 200:1 25 A 500:1 Connecting cable Connection of relays (ground-fault, NGR and trip relay) NGR-fault relay Trip relay

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Connection to the X1 interface Pin assignment X1 interface Digital 1 (configurable: pulser, NGR method) Open Collector: Pulser OUT Open Collector: Device health Output for supply of external relays (+24 V, max. 100 mA) X1: Input I1…3 The input is only detected as “activated” after the contact has been activated for at least 150 ms. This way, short interference pulses are ignored. Active high Analogue output Connection to Q1, Q2: external relay or PLC. Switch Digital 1, active Reset, passive Test open closed Digital 1, active Reset, passive Test < 150 ms Input I1…3: Potential-free contact to...

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Technical Data Insulation coordination according to IEC 60664-1/IEC 60664-3/DIN EN 50187 Definitions Measuring circuit 1 (IC1) (L1, L2, L3) Supply circuit (IC2) (A1, A2) Measuring circuit/Control circuit (IC3) (RS, E, CT), (X1, Ethernet) Output circuit 1 (IC4) (11, 12, 14) Output circuit 2 (IC5) (21, 22, 24) Output circuit 3 (IC6) (31, 32, 34) Rated voltage 690 V Overvoltage category III Rated impulse voltage IC1/(IC2…6) 8 kV IC2/(IC3…6) 4 kV IC3/(IC4…6) 4 kV IC4/(IC5…6) 4 kV IC5/(IC6) 4 kV Rated insulation voltage IC1/(IC2…6) 800 V IC2/(IC3…6) 250 V IC3/(IC4…6) 250 V IC4/(IC5…6) 250 V...

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Digital inputs Galvanic separation Length connecting cables Uin Overload capacity Digital outputs Galvanic separation Length connecting cables Currents (sink) for each output Voltage Overload capacity Analogue output (M+) Operating mode linear Functions INGR, RNGR Current 0…20 mA (≤ 600 Ω), 4…20 mA (≤ 600 Ω), 0…400 μA (≤ 4 kΩ) Voltage 0…10 V (≥ 1 kΩ), 2…10 V (≥ 1 kΩ) Tolerance related to the current/voltage end value ±20 % Ground-fault, NGR, trip relay Switching elements Operating mode Electrical endurance, number of cycles Switching capacity Contact data acc. to IEC 60947-5-1 Rated...

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Ordering information Supply voltage Us / Frequency range Hz System type Accessories Description Accessory for FP200-NGRM: Transparent front cover 144x72 (for IP65)1) When using the “transparent front cover 144x72 (IP 65)” the cutout in the switchboard cabinet must be extended in height from 66 mm to 68 mm (+0.7/-0 mm). The degree of protection IP65 applies only to the user interface FP200-NGRM when using the front cover. The degree of protection for the complete device is still IP30. Suitable system components Description Measuring current transformer Voltage Usys CD-series coupling device...

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Canada • Missisauga ON, Canada 800.243.2438 / 905.602.9990 • info@bender-ca.com www.bender-ca.com USA, Mexico, Central America • Exton PA, USA 800.356.4266 / 610.383.9200 • info@bender.org www.bender.org South America • Santiago de Chile +59 2.2933.4211 • info@bender-latinamerica.com www.bender-latinamerica.com BENDER Group NGRM7xx_D00292_06_D_XXEN / 02.2022 / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the edition valid until 02.2022 unless otherwise indicated. Bender GmbH & Co. KG Londorfer Straße 65 • 35305 Grünberg • Germany Tel.: +49...

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NGRM700 (HRG)NGRM750 (LRG) 12Pages

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NGRM700 (HRG)NGRM750 (LRG)
12Pages