2 PEM330-333_D00004_00_D_XXEN/06.2013
PEM333
Power Quality and Energy Measurement
PEM330/PEM333
Product description
The universal measuring device PEM330/333 is used to record and indicate electrical
quantities of a public electricity network. The scope of measurements ranges from currents
and voltages through energy consumption and performance to total harmonic distortion
and voltage quality assessment. The active energy measurements are in compliance with
the DIN EN 62053-22 class 0.5 S accuracy standard.The current inputs are connected via
external …/1 A or …/5 A measuring current transformers.
Typical application
• As a compact device for front panel mounting, the PEM330/333 is a replacement
for analogue indicating instruments
• Typical application in low and medium-voltage networks
(via measuring voltage transformer)
• Power quality monitoring
• Collection of relevant data for energy management systems
• Energy consumption allocation to cost accounting centers
Description of function
• Sampling rate of the measuring channels: 1,6 kHz
• Calculation of the total harmonic distortion THD
U
/THD
I
: up to the 15th harmonics
• Password protection
• Easy installation with mounting clips, no tools required
• Inputs and outputs (PEM333 only):
– 2 digital outputs
– 6 user-programmable setpoints (response values, response delay 0…9999 seconds)
– System protocol: 32 events, setup changes, DI/setpoint status changes, DO operations
• Communication (PEM333 only):
– Electrically isolated RS-485 interface (1,200 bit/s to 19,200 bit/s)
– Modbus-RTU protocol
Standards
The universal measuring device for Power Quality and Energy Measurement PEM330/PEM333
was developed in accordance with the following standards: DIN EN 62053-22 (VDE 0418
Part 3-22), DIN EN 61557-12 (VDE 0413-12)
Device features
• Accuracy class according to IEC 62053-22:
0.5 S
• Measured quantities
– Phase voltages
U
L1
,
U
L2
,
U
L3
in V
– Line voltages
U
L1L2
,
U
L2L3
,
U
L3L1
in V
– Phase currents
I
1
,
I
2
,
I
3
in A
– Neutral current (calculated)
I
4
in A
– Frequency
f
in Hz
– Phase angle for
U
and
I
in °
– Power per phase conductor S in kVA, P
in kW, Q in kvar
– Total power S in kVA, P in kW, Q in kvar
– Displacement factor cos (φ)
– Power factor λ
– Active and reactive energy import in
kWh, kvarh
– Active and reactive energy export in
kWh, kvarh
– Voltage unbalance in %
– Current unbalance in %
– Harmonic distortion (THD) for
U
and
I
– k-factor for
I
• Programmable setpoint monitoring
(PEM333 only)
• LED pulse outputs for active and
reactive energy
• Modbus/RTU communication via RS-485
(PEM333 only)
• 2 digital outputs (PEM333 only)
• Demands of energy and current for
particular time frames
• Peak demands with timestamps
0.5S
PEM330
PEM333
RS-485
–
Digital inputs
–
2
Digital outputs
–
2
Sampling rate
1.6 kHz
1.6 kHz
THD calculation
15.
15.
Features
