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Product Introduction
General instruction
NSR - 3760 series intelligent power distribution and monitoring products including NSR - 3761 power parameter measuring instrument, NSR - 3762 power quality monitoring device, NSR - 3763 gateway meter, NSR3765 power integrated monitoring and controlling protection device, etc., NSR-3760 series products widely adapt to various of control system, energy management system, distribution network automation, district power monitoring, industrial automation, intelligent building, intelligent switchboard, switchgear, which voltage level no more than 10 KV. The advantages of NSR-3760 series product are convenient installation, wiring simple, easy maintenance, low engineering quantity, etc.
Features
Adopt high performance hardware platform, 32-bit RISC CPU, rich of external setting resources.
Adopt high speed sampling AD.
Main body is made with high reliability industrial class component, adopt automatic monitoring and compensation technology to improve the stability and reliability of the hardware.
Resistance strong interference, adapt the special rugged environment.
Analog circuit with high precision, wide range component, without amplitude, phase adjust circuit, circuit simple and reliable, without zero drift, low workload of debugging and maintaining.
LCD, interface menu intuitional and friendly, information detailed and visual, convenient operating and debugging.
Consummate device self-checking strategy
Functions
Can measure the full electric quantity parameter
Can measure the harmonic and display it as bar graph, can calculate the harmonic containing rate and distortion rate.
Possess out-of-limit alarm function and voltage swell, voltage dip, transient and flicker judgment function.
With switch value input, used to monitor external middle control contactor
With relay output, used to control other devices
Can output DC24V power supply to charge the external transducer
Can output multi-circuit 4-20mA analog quantity
RS485 interface, support Modbus-RTU communication protocol, parameter can be setup, support ethernet
Possess power metering, statistics, freeze function, can provide multi-rate and sub-time billing.
Possess variety of protection such as repressing directional over-current, high circle load shedding, low voltage, high voltage and resist countercurrent.
Specification
| Product | NSR-3761 | NSR-3762 | NSR-3765 | NSR-3762 |
| General instruction | ||||
| Adopt high voltage/low voltage system | w | w | w | w |
| Current precision(1A-5A) | 0.5% | 0.2% | 0.1% | 0.2% |
| Voltage precision(phase 57-288V) | 0.5% | 0.2% | 0.1% | 0.2% |
| Electrical energy and power precision | 1.00% | 0.50% | 0.20% | 0.50% |
| Sampling point/circle wave or sampling frequency | 64 | 128 | 1024 | 128 |
| Real-time effective value measuring | ||||
| Current, voltage, frequency | w | w | w | w |
| Active, reactive, apparent power total/phase | w | w | w | w |
| power factor total/phase | w | w | w | w |
| Electrical energy | ||||
| Active, reactive, apparent electrical energy | w | w | w | w |
| Can setup accumulate mode | w | w | w | w |
| Demand | ||||
| Current, present/max | w | w | w | w |
| Active, reactive, apparent power, present/max | w | w | w | w |
| Demand interval synchronization | w | w | w | w |
| Demand measuring mode interval/slip difference | w | w | w | w |
| Power quality measuring | ||||
| Harmonic distortion, current and voltage | w | w | w | w |
| Fractional harmonic | 31 | 63 | 63 | 63 |
| Waveform capture | w/o | w | w/o | w/o |
| Voltage swell, dip, short interruption | w/o | w | w/o | w/o |
| Transient capture | w/o | 20µs | w/o | 20µs |
| Flickering | w/o | w | w/o | w |
| High speed data recording (100 or 200ms) | w/o | w | w/o | w |
| Power freeze (hour, day, month, meter reading day) | w/o | w | w/o | w |
| Can programmed (logic and count ) | w/o | w | w/o | w |
| Protection function | ||||
| Compound voltage direction over-current protection | w/o | w/o | w/o | w |
| Low circle load shedding | w/o | w/o | w/o | w |
| High circle load shedding | w/o | w/o | w/o | w |
| Low voltage protection | w/o | w/o | w/o | w |
| Over voltage protection | w/o | w/o | w/o | w |
| Resist counter current protection | w/o | w/o | w/o | w |
| Data recording | ||||
| Mix/max value | w | w | w | w |
| Data recording | w | w | w | w |
| Event recording | w | w | w | w |
| SER (Sequence of event recording) | Optional | Optional | Optional | Optional |
| Time scale | w | w | w | w |
| Memory(M) | 2 | 128 | 128 | 128 |
| Communication | ||||
| RS485 Modbus protocol | w | w | w | w |
| Ethernet port | w/o | 1 | 1 | 1 |
| Alarm (automatic alarm available) | w | w | w | w |
| Assistant function | ||||
| Self-checking | w | w | w | w |
| Hardware loop online testing | w | w | w | w |
| Additional | ||||
| F76X4 | 8DI, 2DO | 8DI, 2DO | 8DI, 2DO | 8DI, 2DO |
| F76X3 | 6DI, 4DO | 6DI, 4DO | 6DI, 4DO | 6DI, 4DO |
| F76X2 | 2AI, 2AO, 4DO | 2AI, 2AO, 4DO | 2AI, 2AO, 4DO | 2AI, 2AO, 4DO |
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