INFO DATA ground fault

_Efc BENDER Neutral Grounding Resistor Monitor Device features • Determination of Rngr with passive and active measurement methods • Continuous monitoring of the Rngr even if the installation is de-energized; • Alarm or trip on ground fault • Monitoring of the voltage UNGR • Ethernet communication • Language selection (German, English GB and US, Spanish, French) • Test button (internal, external) with/without tripping • FFT analysis of neutral current and voltage • Pulser control for manual ground fault location • Relay outputs for detection of ground faults and resistor faults • Relay output...

active The device generates an active test pulse and measures RNGR even if the installation is de-energised. Should the use of frequency inverters lead to interferences with the RNGR measured value during the active measurement, a filter for active resistance measurement can be added. To this end, 3 pre-defined filters (weak, medium, strong) have been implemented. In addition, the filter parameters can be adapted individually in the setting “Customer-specific”. passive The resistance RNGR is determined when INGR or UNGR exceeds an internal threshold. The device measures the existing current and...

NGR monitor NGRM Kr BENDER Device buttons Display elements 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 (Ingr trip elapses). The LED is on when an NGR fault has been detected. Trip relay and NGR-fault relay have tripped. on when power supply is available The LC display shows device and measurement information. The LED is on when there is either a device fault or a connection fault, and when...

Connection: Star connection Circuit breaker L1 Ground fault The “N” connection of the CD-series coupling device should be as close to the transformer star point as possible. Connection: Star connection with pulser Circuit breaker L1 Ground fault 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 X1.

NGR monitor NGRM Kr BENDER If no star point is available, the following circuit can create an artificial neutral. N Connection to star point PE Connection to the protective earth conductor of the installation (PE)

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 CTAC… / CTAS… Any standard current transformer can be used. Connection of relays (ground-fault, NGR-fault and trip relay) Ground-fault relay NGR-fault relay Trip relay...

Connection to the X1 interface X1: Output Q1…2 Digital 1 (configurable: pulser, NGR method) Analogue output Open Collector: Pulser OUT Open Collector: Device condition (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 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...

Technical Data Insulation coordination according to IEC 60664-1/IEC 60664-3/DIN EN 50178 Measuring circuit/Control circuit (IC2) Output circuit 1 (IC3) Rated voltage Overvoltage category Rated impulse voltage IC1/(IC2...5) Rated insulation voltage IC1/(IC2_5) Pollution degree exterior Safe isolation (reinforced insulation) between Voltage tests (routine test) acc. to IEC 61010-1 overvoltage category III, 300 V overvoltage category III, 300 V overvoltage category III, 300 V overvoltage category III, 300 V Nominal measuring current In Maximum continuous current Overload capacity Measurement accuracy...

Analogue output (M+) Operating principle 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 operational voltage AC Utilisation category Rated operational current AC Rated operational current AC (for UL applications) Rated operational voltage DC Utilisation category Rated operational current DC Minimum...

RBENDER Description 11 All types and ordering informations of this series are available on our website Ordering information Suitable system components

Bender GmbH & Co. KG • Germany Londorfer StraRe 65 • 35305 Grunberg Tel.: +49 6401 807-0 • [email protected] www.bender.de USA, Mexico, Central America • Exton PA, USA 800.356.4266 / 610.383.9200 • [email protected] www.bender.org Canada • Missisauga ON, Canada 800.243.2438 / 905.602.9990 [email protected] • www.bender-ca.com © Bender GmbH & Co. KG, Germany Subject to change! South America • Santiago de Chile The specified standards take into +59 2.2933.4211 • [email protected] account the edition valid until 06.2023 www.bender-latinamerica.com unless otherwise indicated.