Metravi DC Ground Fault Locator

Sebelum PPN:
Rp609.999.900 - Rp669.999.900
Spesifikasi
AC Crossing Voltage Range (V)AC 0 ~ 280
AC Voltage Resolution & AccuracyResolution: 1V, Accuracy: 5% ± 5V
Applicable DC System Voltage Grade (V)220, 110, 48, 24
Clamp Dynamic RangeDouble wire: 0~40A (load), Single wire: -5A to +5A
Clamp Power Supply2xAA (No.5) alkaline dry batteries (10-20h work)
DC Voltage Measurement Range (V)DC 0 ~ 500
DC Voltage Resolution & AccuracyResolution: 1V, Accuracy: 5% ± 5V
Distributed Capacitance to GroundBranCh: ≤ 47µF, System Total: ≤ 150µF
Earth Leakage Current Resolution (mA)0.1
Ground Impedance Measurement Range (ohm)0 ~ 1 M, Accuracy: 10% ± 3k
Insulation Impedance Resolution (ohm)1 k
Insulation Resistance Measuring Range (ohm)0 ~ 600 k
Insulation Resistance Range (ohm)0 ~ 1 M, Accuracy: 10% ± 3k
Max Transmitter Output Current (mA)5
Power ConsumptionTransmitter < 15W, Receiver < 2W
Power Supply ModeDC screen power supply (220V, 110V) or AC 220V (AC is preferred)
Receiver Power SupplyBuilt-in rechargeable lithium battery (20h work, 3-4h charge)
Temperature (°C)-10~40
Transmitter (Output signal frequency) (Hz)Current Difference Mode: 0.1Hz ~ 0.25Hz adaptive frequency; Waveform Locating Mode: 0.5Hz / 0.2Hz / 0.1Hz
Wireless CommunicationISM Frequency: 433MHz, Air Speed: 2.4 KBPS, Signal Power: 30dBm

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Informasi Produk

Description
The ground fault of DC system in power system is a kind of fault which is easy to happen and is harmful to power system. Whether it is positive or negative ground, it may cause the protection to be mis-operated or the protection to resist, endangering the normal operation of the power system.
DC system ground fault locator, is used for power station and transformer substation DC power system ground fault locating and
pinpointing.
The Metravi DCGFL-999 adopts isolate programmable constant flow source to insert small current single to find the faulty point quickly, accurately and safely.
The waveform analysis method real-time calculate and display the resistive current value, the current direction and check the ground current waveform directly.
Device effectively gets rid of the system distributed capacitance interference and solves the locating of high resistance ground, low resistance ground, AC in DC ground, instant ground, impulse interference,
Feature
l No need system power off, power on to locate the system ground fault on-line to rise the system safety.
l AC crossing into system checking function to avid the device damage of AC in
l Auto test the DC system voltage and auto adjust output voltage
l Intelligent distinguish the ground state and auto alarm when grounding.
l The transmitter detects fault information such as positive and negative bus voltage, fault resistance, grounding capacitance andbalance resistance in real time.
l The transmitter supports DC and AC power supply modes; DC power supply without external power supply, direct power from the DC system, simple and convenient wiring.
l The transmitter can measure the DC system grounding resistance and distributed capacitance to the ground, and automatically calculate the optimal frequency of the output signal.
l In the current difference location mode, the receiver calculates and displays the resistive current in real time through the difference between the injected current signals, so as to determine the fault points in real time.The test sensitivity is greatly improved and can measure up to 1M insulation faults.
l Under the current waveform positioning mode, the receiver adopts waveform analysis digital signal processing technology to calculate and display the resistive current waveform in real time, so as to determine the fault point in real time.
l Using wireless communication technology, real-time data transmission, convenient and fast.
l Low battery indicator function of receiver: the instrument will automatically alert when the battery is under voltage.
l Receiver automatic power off function: within 60 minutes without operation or battery low voltage to a certain extent can be automatically power off

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