Tettex MIDAS 2881, Operating Instructions Manual

Page: 14 / 164

4 Technical Data
4
2 Technical Data
HV Power Supply
MIDAS 2881 MIDAS 2881G
Output Voltage Up to 12 kV Up to 15 kV
Output Voltage Regulation 
1 % rdg

1 V

1 % rdg

1 V
Output Frequency @ Nom Volt 45Hz …. 70 Hz 45Hz …. 70 Hz
Output Frequency @ 5kV 15 Hz … 1000 Hz 15 Hz … 1000 Hz
Output Current
1
@ Nom Volt 115 mA
continuous
, > 275mA
max 1 min.
115 mA
continuous
, > 275mA
max 1 min.
Output Current @ 10kV 165 mA
continuous
, > 400mA
max 1min.
165 mA
continuous
, > 400mA
max 1 min.
Output Power
1
max
> 4000 VA > 4000 VA
Output PD level
2
max

500 pC

500 pC
Duty cycle 
1650VA
1650 .. 2000 VA 2001 .. 3000 VA >3001
continuous 30 min. ON / 1h 5 min. ON / 1h 1 min. ON / 1h
1 Can be expanded with optional Resonating Inductor
2 Can be reduced with additional filters on coupling capacitor
Measuring Unit (MIDAS 2881 & MIDAS2881G)
Range Resolution Accuracy
Test Voltage < 1MV 1 V

0.2 % rdg

1 V
Dissipation Factor (tan

)
0 … 10’000.% 0.001% 
0.5 % rdg

0.01.%
Power Factor (cos

)
0 ... 100.% 0.001% 
0.5 % rdg

0.01.%
Quality Factor 0.01 ... 10000 0.0001

0.5% rdg

0.0001
Capacitance 0.01pF

0.2 % rdg

0.2pF
Inductance 0.1mH

0.5 % rdg

0.5 mH
Test Current
Input A, B & HVGND
20.uA … 15 A 0.1 uA

0.1 % rdg

1 uA
Ref Current
Input Cn ext
20.uA … 300 mA 0,1 uA

0.1 % rdg

1 uA
Test Frequency 15 Hz … 1000 Hz 0.01 Hz

0.1 % rdg

0.1 Hz
Apparent Power S

1 MVA
0.1 mVA

0.8 % rdg

1 mVA
Real Power P

1 MW
0.1 mW

0.8 % rdg

1 mW
Reactive Power Q

1 Mvar
0.1 mvar

0.8 % rdg

1 mvar
Accuracy @ frequency 15Hz…100Hz ; In & Ix > 20  A ; Ix/In: 0.01 .. 10’000 ; With Internal Cn
Internal reference capacitor
Capacitance 100 pF
tan

< 0.00002
Capacitance constancy < 0.01.% / year
Temperature coefficient < 0.01.% / K
Mains Power supply
Voltage / Frequency 90 VAC … 264 VAC / 50 … 60 Hz
Input Power 1 kW
Environmental
Operating Temperature -10 .. 50 °C
Storage Temperature -20 .. 70 °C
Humidity 5 .. 95 % r.h.
Protection classes IP22, IEC 61010, CE mark, general IEC 61326-1,
IEC 61000-4-X, 61000-3-X, EN 55011, ANSI/IEEE C37.90
Safety Specification VDE 0411/part 1a , IEC/EN 61010-1:2002