SATEC EM720 Operation Manual User Manual

Page 10

Chapter 1 Introduction

EM720 Power Quality and Revenue Meter

• Harmonic Analyzer: up to 50th harmonic volts and

amps; fundamental volts, amps, power and power
factor, phasor, symmetrical components

Power Quality

• EN 50160 Power Quality (PQ) recorder: onboard power

quality analyzer; programmable limits; EN 50160
power quality event log, EN 50160 compliance
statistics; EN 50160 harmonics survey statistics

• Power frequency, voltage variations, rapid voltage

changes, IEC 61000-4-15 flicker, voltage dips,
interruptions, temporary overvoltages, transient
overvoltages, voltage unbalance, IEC 61000-4-7
harmonic and interharmonic voltage, mains signaling
voltage

• High-voltage fast transient recorder (EM720T);

impulsive and low frequency oscillatory transient
overvoltages with peaks up to 2kV and durations from
20 microseconds

• Ready-for-use compliance statistics reports with the

supplemental software

Fault Recorder

• Digital Fault recorder: three voltage and four current

channels, up to 8 external digital triggers for
monitoring circuit breakers and protection relays;
onboard overcurrent and undervoltage fault detector;
zero-sequence voltage and current, voltage and
current unbalance; programmable fault thresholds and
hysteresis

• Up to 50 Amp fault currents

• Ready-for-use fault reports with the supplementary

software - fault current magnitudes and duration,
coincident volt magnitude, fault waveforms and fast
RMS trace

Event Recorder

• Event recorder for logging internal diagnostics events,

setpoint and I/O operations

Waveform Recorders

• Three Waveform recorders: up to 7 channels

simultaneous recording of three voltage and four
current channels

• Fixed and event-controlled recording time

• Selectable sampling rate of 32, 64, 128 or 256

samples per cycle; 1-20 pre-fault cycles; 0-2048 post-
fault cycles in event-controlled mode; up to 3 min of
continuous recording at a rate of 32 samples per cycle

• Optional 4-channel transient voltage recording at 1024

samples per cycle (EM720T)