PM7500
Power quality, harmonics, flicker and waveforms substation monitor.
Dynamic Containment Dual Frequency Measurement to 0.001Hz resolution.
Individual Harmonics, Interharmonics and Interharmonic Sub-Groups to the 100th order
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About The PM7500
The PM7500 Power Quality and Energy Monitor, an upgraded replacement of the PM7503, is a panel mounted variant of our top of the range PM7000 Power Quality Analyser. As with the PM7000 and PM7000FLM, as well as recording numerous power quality parameters, the PM7500, with our Enhanced Harmonics upgrade, is able to simultaneously record individual Harmonics to the 100th on 3 Voltage and 3 Current channels, and to the 50th on the remining 2 channels, as well as the Interharmonic and Interharmonic Sub groups to the 100th as required by ENA Recommendation G5/5.
The PM7500 also has Dual Frequency measurement capability, measuring frequency to 0.001Hz resolution on V4 as an independent fast frequency option with an accuracy of 0.002Hz and noise typically less than 0.001 Hz RMS. This fast frequency measurement is being used to fulfil the National Grid Dynamic Containment requirement of providing ongoing, time-synchronised, gapless data packets, over TCP-IP, of the power and high resolution frequency measurements. These values are required hourly by National Grid to ensure the Dynamic Containment provider is capable of responding as per their Dynamic Containment agreement. Read more about our Dynamic Containment offering here.
The PM7500 records events, trends and transients with min/max logging. As standard, it can also record >500 channels simultaneously and has automatic sag/swell monitoring down to single cycle on 32 channels using our unique recording regime Single Cycle Adaptive Store. As well as measuring flicker and other parameters, the standard unit measures and records harmonics up to the 50th order. As explained above, with our Enhanced Harmonics upgrade, the user can record individual current and voltage harmonics, interharmonics and Interharmonic Subgroups to the 100th simultaneously.
The PM7500 has waveform capture at 384 samples/cycle at 50Hz (19.2kHz) and Ethernet, USB and Bluetooth communication. It is also compatible with Nortech iHost and can be rack-mounted if required.
For dimensions and other installation information please contact us.
Key Features Include
- Nominal 110Vac (< 300V RMS) for secondary VT output Power Quality and Energy Monitor
- 0-300Vdc measurement
- Flicker measurements to IEC61000-4-15: Instantaneous Flicker Sensation,Short Term and Long Term Flicker Perceptibility.
- Single Cycle Adaptive Storage™ recording process provides extremely high resolution over long recording periods.
- 32 Troubleshooting channels with single cycle detail.
- General Parameters: Over 470 channels which record automatically for reporting to the Standards.
- Auto-Ranking Waveform Capture: High speed waveform capture ranked for disturbance severity, 7 types of disturbance captured: Transients, falls (sags), rises (surges), rings, notches, THD, Total Harmonic Value. No thresholds need to be set.
- Harmonics to the 50th (standard): THD and individual harmonics to the 50th as standard. As well as using the 32 detailed recording channels, record 1-50th harmonics on all voltage and current channels in General Parameters every measuring session (400 parameters over all 8 inputs).
- Enhanced Harmonics and Interharmonics Option: Automatic and simultaneous measurement of harmonics*1 to the 100th on 6 inputs (V & I), and to the 50th on remaining 2 inputs as well as individual inter-harmonics between fundamental and second harmonics and inter-harmonic sub-groups to the 100th (3 x V only). Individual harmonics, inter-harmonics, groups and sub-groups to the 127th harmonic on any phase can also be measured on detailed Adaptive Store channels. THD and THC also available to the 100th Harmonic.*1 As required by the EN61000-4-7 and G5/5 Standards, harmonics recorded as General Parameters are Harmonic sub-groups comprising the Root Sum Square of the harmonic itself plus the two adjacent 5 Hz lines.
- Dual /Fast Frequency Option: Independent frequency variation measurement on V4. Resolution to 0.001Hz (frequency), single cycle (time), latency ~3 cycles. FFR (V4) measurement range 40-70Hz.
- Dynamic Containment seamless hourly data download facility: Ongoing download facility of time-synchronised, gapless data packets, over TCP-IP, of the power and high resolution frequency measurements required by National Grid to prove a Dynamic Containment Provider’s readiness to act with their fast-acting frequency response.
- Fault Level prediction Option: Peak and RMS fault current predictions generated by observing natural disturbances on the network. See PM7000 FLM product page for more details.
- Bi-colour, status LEDs, externally visible, show recording/memory/voltage/power conditions.
- Bluetooth, Ethernet, USB, USB Flash Drive connectivity.
- Volt free contact closure for status output.
- Comes with Pronto for Windows software, a highly regarded data recovery and analysis package.
- Rack-mounting kit available on request (2U x 19 inches)