ProductOverview-PQ-MeasuringMonitoringRelays

3 Universal measuring devices and measuring relays to monitor electrical installations Safety of power supply To ensure personnel and equipment safety, operating conditions of electrical installations have to be monitored continuously. The physical quantities of current and voltage are not visible to humans without the use of appropriate measuring devices. PEM series universal measuring devices (Power Quality and Energy Measurement) record all relevant parameters such as current, voltage, frequency, power, harmonics and the energy consumption of electrical supply systems, to mention but a few. LINETRAXX® monitoring relays cover a broad spectrum; from single-channel current relays (CME420), loop monitoring (GM420) up to three-phase voltage relays (VMD460-NA) for power generation systems in accordance with VDE-AR-N 4105. Bender also offers special solutions for specific applications such as fully analogue devices (VMD258). Highest level of availability despite system reactions Increasing requirements regarding the high availability of electrical installations, and more and more complex production and automation processes conflict with an increased use of power electronics. System reactions become a topic of increasing concern to both operators and suppliers. Therefore digital universal measuring devices do more than record r.m.s. current and voltage values, they also replace analogue indicating instruments in switchboard and distributor cabinet doors. Harmonics, flicker severity, neutral currents and many more measuring quantities are recorded, evaluated and transferred via communication interfaces. Exceeded of configurable threshold values can also be signalled via relay outputs. The control centre of Bender Monitoring Systems centrally provides all relevant electrical installation data, which are easily accessible by means of a browser. Power Quality and Energy Measurement PEM In practice ■■ Universal measuring devices and measuring relays to monitor electrical installations....................................................... 3 ■■ Transparency for electrical installations...................................... 4 ■■ Example for system set-up............................................................... 5 Products ■■ Universal measuring devices........................................................... 6 ■■ Energy meter......................................................................................... 8 ■■ Measuring current transformers���������������������������������������������������� 8 ■■ Condition Monitor............................................................................... 9 Measuring and monitoring relays In practice ■■ Voltage and phase monitoring.....................................................10 ■■ Current monitoring...........................................................................11 ■■ Special monitoring tasks.................................................................11 Products ■■ Voltage and frequency monitoring relays for AC and DC systems VME...........................................................12 ■■ Voltage and frequency monitoring relays for 3(N)AC systems VMD.................................................................14 ■■ Voltage and frequency monitoring relays for mains decoupling of power generation systems VMD.....................16 ■■ Multifunctional voltage relay for DC, 1AC, 3(N)AC systems VMD........................................................................18 ■■ Voltage relay for 3AC systems VMD............................................19 ■■ Current relay for AC currents CME...............................................20 ■■ Current relay for 3AC currents CMD............................................21 ■■ Current relay for AC currents CMS...............................................22 ■■ Monitoring relays for special applications...............................23 ■■ Retrofit...................................................................................................24 ■■ POWERSCOUT® Find out today what won't happen tomorrow.......................25 ■■ Support during all stages...............................................................26 ■■ Bender. So that your world is safer..............................................27

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