NPG915
主要功能：
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Three-phase overcurrent, 4 stages INST, DT or IDMT [50/51]
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Earth-fault (sensitive), 4 stages INST, DT or IDMT [50N/51N(S)]
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Harmonic overcurrent / inrush blocking, 4 stages INST, DT or IDMT [50H/51H/68H]
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Current unbalance/broken conductor, 4 stages INST, DT or IDMT [46/46R/46L]
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Directional overcurrent, 4 stages INST, DT or IDMT [67]
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Directional (sensitive) earth-fault, 4 stages INST, DT or IDMT [67N]
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Overvoltage, 4 stages INST, DT or IDMT [59]
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Undervoltage, 4 stages INST, DT or IDMT [27]
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Zero sequence overvoltage, 4 stages INST, DT or IDMT [59N]
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Positive sequence under/overvoltage, negative sequence overvoltage, 4 stages INST, DT or IDMT [59P/27P/47]
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Over/under frequency, 4 stages INST or DT [81O/81U]
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Rate of change of frequency, 4 stages INST or DT or IDMT [81R]
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Loss of field [40]
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Power factor [55]
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Voltage restrained overcurrent [51V]
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Field ground / 100% stator earth-fault [64S]
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Over/Under/Reverse power [32/37/32R]
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Generator thermal overload [49M]
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Under impedance [21]
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Overexcitation protection [24]
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Vector jump [78]
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Breaker failure protection [50BF/52BF]
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Arc protection (option) [50ARC]
Generator Protection IED with IEC 61850 protocol
硬件接口
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Large graphic display with customizable mimic
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Push buttons for local control of the up to 5 objects
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16 freely configurable leds
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5 current inputs
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4 voltage inputs
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5+1 output units (standard)
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3 digital inputs (standard)
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1 Front Ethernet port, 1 rear Ethernet port, 1 rear RS485 port
The optimal management of electrical power systems is based in particular on the reliability, availability and communication skills of protection, measurement and automation devices.
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测量功能
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Phase and residual currents (IL1, IL2, IL3, I01, I02)
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Voltage measurements (UL1-UL3, U12-U31, U0, SS)
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Fault locator [21FL]
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Current and voltage harmonics (up to 31st)
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Current THD
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Frequency (f)
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Power (P, Q, S, pf)
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Energy (E+, E-, Eq+, Eq-)
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Circuit breaker wear (CBW)
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Disturbance recorder (3.2 kHz)
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Current transformer supervision (CTS)
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Fuse failure (VTS)
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Trip circuit supervision (74TC)
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事件记录与故障录波
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Up to 100 recordings @ 64 samples/cycle (3.2 kHz)
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Recording lenght configurable from 0.1 to 1800 seconds
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Pre trigger configurable from 5 to 95%
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Non-volatile event records: 15000
控制功能
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Controllable objects: 5
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Synchrocheck [25]
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8 setting groups
通讯规约
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通讯规约
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IEC 61850
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IEC 60870-5-103/101/104
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Modbus/RTU, Modbus TCP/IP
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DNP 3.0, DNP 3.0 over TCP/IP
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SPA
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辅助功能
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Digital inputs optional: +8 per card
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Digital outputs optional: +5 per card (2 cards max.)
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Arc protection (12 sensors +2xHSO +BI)
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2 x mA input + 6-8 x RTD input (2 cards max.)
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Double LC Ethernet 100Mb
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RS232 + serial fibre PP/PG/GP/GG (option)
The NPG915 generator protection IED is well suited for machines requiring complete generator protections. It can be combined with NPT916 to protect larger machines requiring differential protection and greater protection redundancy.
The NPG915 communicates using various protocols including IEC 61850 substation communication standard.
资料下载：
产品介绍
安装尺寸
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