Insulation monitoring device with integrated locating current injector for it ac systems with galvanically connected rectifiers and inverters and for it dc systems (90 pages)
NGRM500 (HRG), NGRM550 (LRG) NGRM500 (HRG), NGRM550 (LRG) Scope of delivery Neutral Grounding Resistor Monitor (NGR) • NGRM500/NGRM550 This quick-start guide does not replace the manual! • Safety instructions • Quick-start Manual Quick-start guide for the following devices Type Supply voltage/Frequency range U Art.
NGRM500 (HRG), NGRM550 (LRG) Connection X1 Digital 1 (configurable: pulser, NGR method) Reset IN Test IN Modbus RTU (A) Modbus RTU (B) Common Analog output Open collector: Pulser OUT Open collector: Device health Output for supply of external relays (+24 V, max. 100 mA) Star configuration Circuit breaker Ground fault...
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10…2000 A 0…3800 Hz 42…3800 Hz 50/60 Hz 50/60 Hz Measuring range Transformation ratio (see CTUB103 manual) Bender measuring current 5 A 100:1 600:1 transformer 10 A 200:1 25 A 500:1 max. 30 m max. 40 m max. 25 m (4 mm²/AWG 12)
NGRM500 (HRG), NGRM550 (LRG) Menu overview 1. Data meas. values , Method, R NGR rel sense, rms rel rms rel, fund fund rel fund fund rel, harm harm rel harm harm rel, 2. Harmonics 3. History History, Delete 4. Pulser Pulser, t Impuls 5.
NGRM500 (HRG), NGRM550 (LRG) HRG system: Recommended minimum value () = Limited temperature range at any field calibration (tripping level 50 %) temperature ±20 K The temperatures must be within the limits of the operat- Temperature range –40…+60 °C, ing temperature range of –40…+70 °C Field calibration at 20 °C [for UL applications –40…+60 °C].) CD1000/CD1000-2...
NGRM500 (HRG), NGRM550 (LRG) 2. System settings of the relays (menu 6.5) 5. Initial measurement The factory setting for the relays is fail-safe. In the case During device start, all measured values are recorded. of a test, the relays change state. Factory settings Fail-safe: The relay is energized during normal operation and is de-energized in the event of a...
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