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B.8 Current transducers and accessories
B.8.1 Current transducers
Gxxx: Current Transducers (Option, to be ordered separately)
Current loop (compensated) current transducers (CT) using an extremely accurate zero flux detector with excellent linearity and low temperature
drift. Electrostatic shield between primary and secondary circuit, with low insertion loss and high immunity to electrostatic and magnetic fields.
To be used with CT power supply and burden resistor to measure high frequency currents.
IT 60-S Ultrastab
IT 700-S Ultrastab IT 1000-S/SP1 Ultrastab
IT 200-S Ultrastab IT 400-S Ultrastab
y x
S D
- +
Power
Amplifier
Output
Amplifier
Standard
Resistor
I
out
I
p
I
p
I
S
N
=
Flux
Detector
Figure B.34: Simplified block diagram and image
Isolation 150 V RMS reinforced isolation
300 V RMS single isolation
Linearity ≤ 3 ppm
Temperature coefficient of I
oe
≤ 0.5 ppm/
o
C (
±
0.9 ppm /
o
F)
Supply voltages
+ 15 V (
±
5%) and
-
15 V (
±
5%), ≤ 80 mA + I
s
Original manufacturers part number LEM ULTRASTAB series
Operating temperature range
10
o
C to +50
o
C (50 °F to 122 °F)
Device
IT 1000
-
S/SP1 IT 700
-
S IT400
-
S IT 200
-
S IT 60
-
S
Primary nominal current DC 1000 A DC 700 A DC 400 A DC 200 A DC 60 A DC
Primary nominal current AC 707 A RMS 495 A RMS 282 A RMS 141 A RMS 42 A RMS
Secondary nominal current DC 1000 mA DC 400 mA RMS 200 mA RMS 200 mA RMS 100 mA DC
Conversion ratio (N) 1000:1 1750:1 2000:1 1000:1 600:1
Burden recommendation HBR1.0 HBR2.5 HBR2.5 HBR2.5 HBR10.0
dI/dt risetime ≥100 A/µs ≥100 A/µs ≥100 A/µs ≥100 A/µs ≥25 A/µs
Small signal bandwidth (
-
3 dB)
500 kHz 500 kHz 500 kHz 500 kHz 800 kHz
Weight (typical) 1.0 kg (35.3 oz) 0.8 kg (28.2 oz) 0.3 kg (10.6 oz) 0.3 kg (10.6 oz) 0.3 kg (10.6 oz)
Dimensions
Cable diameter 30 mm (1.18") 30 mm (1.18") 26 mm (1.02") 26 mm (1.02") 26 mm (1.02")
Width 128 mm (5,03”) 128 mm (5,03”) 93 mm (3,66”) 93 mm (3,66”) 93 mm (3,66”)
Height 106 mm (4,17”) 106 mm (4,17”) 77.7 mm (3,05”) 77.7 mm (3,05”) 77.7 mm (3,05”)
Depth 85 mm (3,34”) 67 mm (2,63”) 57 mm (2,24”) 57 mm (2,24”) 57 mm (2,24”)
GEN3i
I3763-3.1 en HBM: public 751