ULTRASTAB
867-1000IHF
Precision
Current
Transducer
The Ultrastab 867-1000IHF Current Transducer is a model in the Ultrastab Current Transducer
program.
It is the second generation of current transducers from Danfysik with transducer head and
SMD based electronics integrated in one assembly.
The 867-1000IHF features a new zero flux detector construction with extrreme low noise feed
back, compact in size and competitive in price.
It ranges 0-1000A from DC to 150kHz with a temperature drift lower than 0.1ppm/°C. Powered
with ±15V it produces an analog output current of 1000mA at 1000A primary current.
Output noise and noise feed back to the main conductor are both extremely low, and electrostatic shielding ensures maximum immunity against external electrostatic fields.
The 867-1000IHF features
• Bipolar - up to 1000A primary current with 1000mA
output current
• Low noise on output signal
• Noise feed-back to main conductor <5µV
• Resolution better than 0.05ppm
Applications
• Feed back element in high performance gradient amplifiers for MRI
• Feed back element in precision current regulated power supplies
North American Distributor: GMW Associates • 955 Industrial Rd • San Carlos, CA 94070 • USA
Tel +1 650 802 8292 • Fax +1 650 802 8298 • sales@gmw.com • www.gmw.com
Danfysik A/S • Møllehaven 31 • DK-4040 Jyllinge • Denmark
Tel. +45 4679 0000 • Fax +45 4679 0001 • www.danfysik.com
• Bandwidth DC to 150kHz
• Linearity better than 3ppm
• Traceable absolute calibration
• Temperature drift less
than 0.1ppm/°C
Working principle
The Ultrastab 867 Current Transducer system is a unique design, based on the zero flux principle for galvanically isolated current
measurement.
The Ultrastab 867 has a built-in free-running oscillator, which drives the zero flux detector circuitry.
With the primary current conductor through the transducer head center hole and current flowing, the electronics will generate a current in the built-in compensation winding counterbalancing the primary ampere turns.
A very sensitive and extremely low noise detector circuit will detect when zero flux is obtained, and an analog current signal will be
generated at the output terminals in direct proportion to the primary current.
Installation
The Ultrastab 867-1000IHF unit is fully self-contained, requiring only ±15V voltage supply. All connections via a 9-pole D-sub socket.
It can be installed in any orientation and has a high immunity against external magnetic and electrostatic fields.
With the 867 delivered with the standard transfer ratio of 1000:1, a 1000A primary current will generate a 1000mA compensation cur
rent. Wired up with a 1 Ohm Burden resistor, an 1V analog output signal will be available.
If e.g. a max. 300A primary current is to be measured, the Burden resistor can be increased to 6.6 Ohm producing an 1V analog
signal. From Fig. 1 on the attached installation data sheet it can be seen that the 867-1000IHF can operate with higher resistance values
of Burden resistors, but in order to get the best performance out of the Burden resistors, we recommend to keep the power loss as
low as possible.
Standard features
The Ultrastab 867 is equipped with opto insulator for status interlock reading. A LED on the front shows NORMAL OPERATION i.e.
interlock status ok.
FACT.Ultrastab867-1000IHF.0207-A • Specifications are subject to change without notice.
The Ultrastab 867 has a built-in scanning/lock in circuit for automatic recovery to normal operation after overload condition.
Accessories
• 9-pol D-sub with 2m shielded cable
• ø30mm busbar
Ordering information standard
• 867-1000IHF current transducer
• 866/867-SC, 2m shielded cable
• 199080011 Primary Cable Kit
• 866/867-BB bus bar
Last update: 5.1.2009
Ultrastab 867-1000IHF
Current transducer
Parameter
Symbol Condition
Primary current
Nominal primary current
Polarity
Ip
Secondary current
Nominal secondary current
Is
External burden resistor
Max.
Min.
Rb
Rb, max
Rb, min
3
0
Current transfer ratio
N
1000
Overload capacity
Max. nondestructive overload
Min. overload trip value
Ip, max
Ip, trip
@ 0.1s
Value
Unit
± 1000
Bipolar
A
± 1000
m
A
Ω
Ω
500
110
%Ipn
%Ipn
DC accuracy
Offset
Initial
Drift vs. Temp.
Drift vs.supply voltage
Linearity
Deviation
Iso
Iso, temp
Iso, supply
< 50
< 0.5
< 3ppm / %
ppm
ppm /°C
Xd
<3
ppm
Output noise
Is, noise
< 0.05
<3
<6
ppm (RMS)
ppm (RMS)
ppm (RMS)
0 - 10Hz
0 - 10kHz
0 - 50kHz
Page 1 of 3
Last update: 5.1.2009
Ultrastab 867-1000IHF
Current transducer
Parameter
Symbol Condition
Value
Unit
Dynamic response
Slew rate
dI/dt
10 - 90%
> 100
A / µS
< 0.5% Ipn
150
kHz
DC - 50kHz
<5
µV RMS
Bandwidth
±0.4dB (small signal 20A pp )
f
Busbar noise
Measured on primary cable, one turn
Ub
Busbar free zone
Lenght
Radius
l
r
220
110
mm
mm
Test voltages
Busbar to GND
Vt, b
5000
VAC RMS
Power supply
Supply voltage
Maximum quiescent current
Maximum current consumption
Vs
Iq
Imax
± 15
± TBD
± TBD
V
mA
mA
Operating environment
Temperature
Humidity
Ta
RHa
Noncondensing
10 - 50
20 - 80
ºC
%RH
Storage environment
Temperature
Humidity
Ts
RHs
Noncondensing
−20 - 85
20 - 80
ºC
%RH
± 5%
Page 2 of 3
Last update: 5.1.2009
Ultrastab 867-1000IHF
Current transducer
Parameter
Symbol Condition
Value
Unit
Mechanical dimension
Width
Height
Depth
Weight (approx.)
Inner hole diameter
W
H
D
m
O
104
106
85
1.0
30
mm
mm
mm
kg
mm
Notes:
1: All ppm figures refer to nominal current
2: Specifications are subject to change without notice
Installation Notes:
1: We recommend that a shielded cable and plug are used to ensure the minimum immunity against electrostatic fields.
2: Pin Configuration: Pin 1 Current return
Pin 2 N.C.
Pin 3 Normal operation status
Pin 4 GND
Pin 5 -15V supply voltage
Pin 6 Current output
Pin 7 N.C.
Pin 8 Normal operation status
Pin 9 +15V supply voltage
House Electrostatic shield
Manufacturer: Danfysik A/S • Møllehaven 31 • DK-4040 Jyllinge • Denmark
Tel. +45 4679 0000 • Fax +45 4679 0001 • danfysik@danfysik.dk • www.danfysik.com
North America Distributor: GMW Associates • 955 Industrial Rd • San Carlos, CA 94070 • USA
Tel. +1 650 802 8292 • Fax +1 650 802 8292 • sales@gmw.com • www.gmw.com
Page 3 of 3
8
7
6
5
4
3
2
A
99,0
98,5
1
A
B
B
C
C
84,2
60,0
D
D
n6,5
E
E
n5,5
F
F
FIRST ANGLE
PROJECTION
,0
G
MACHINING:
SCALE: 1:1
867-1000IHF
Assembly
FILE: 89318.idw
CUSTOMER:
SURFACE TREATMENT:
Transducer
H
H
(1:2)
TOLERANCE: ±0.1
128,0
30
n
90,0
104,0
G
PROJECT NO.:
3,0
105,0
109,0
I
I
J
SIZE: A3
SHEET 1 of 2
89318
SFH
DATE: 24-02-2006
REVISION:
DWG. NO.:
PROJ. ENGR.
PROD. APP.
DESIGN APP.
DRAWN BY
MATERIAL:
IMPORTANT!
This document contains information which
is the proporty of Danfysik A/S, Denmark. It
is submitted to you in confidence that it will
not be disclosed or transmitted to others
without Danfysik's authorization.
J
8
7
6
5
4
3
2
1
ULTRASTAB 867-1000IHF – INSTALLATION
ULTRASTRAB 867-1000IHF
User side
Closed contacts = Normal Operation
D-SUB-9
Current Output
Current Return
+ 15 V
DF DWG No. 88961
6
6
White
Current Output (+/- 400mA)
1
1
Brown
Current Return
9
9
Green
+ 15 V ( +/- 5% )
5
5
Grey
- 15 V ( +/- 5% )
4
4
Pink
GND
8
8
Blue
Status ( max. 1A )
3
3
Red
Status ( max. 1A )
7
7
2
2
Yellow
- 15 V
GND
Max. 1A
n.c.
n.c.
Shield
Electrostatic shield
Ground
Pin configuration for 9 pole D_SUB :
Pin 1 Current return
Pin 2 N.C.
Pin 3 Normal operation status
Pin 4 GND
Pin 5 -15V supply voltage
Pin 6
Pin 7
Pin 8
Pin 9
House
Current output
N.C.
Normal operation status
+15V supply voltage
Electrostatic shield
Electrical specification - power :
Supply voltage pin 9 to pin 4
Supply voltage pin 5 to pin 4
Supply current pin 9 to pin 4
Supply current pin 5 to pin 4
Test voltage secondary (pin 4) to shield
:
:
:
:
:
+ 15 V +/- 5 %
- 15 V +/- 5 %
+ 70 mA + output current ( 1 A nom. )
- 70 mA - output current ( 1 A nom. )
200 VDC
Electrical specification – status signal :
Trip level
Max. voltage pin 8 to pin 3 , off-state
Max. current pin 8 to pin 3 , on-state
Reverse voltage pin 8 to pin 3 , off-state
On-voltage pin 8 to pin 3 , I = 10 mA
:
:
:
:
:
Ip > 110 %
45 V
30 mA
5V
0.3 V max
Accessories :
• 9 pole D-sub plug with 2m shielded cable ( Part No. 65889610 )
• 1.0 Ω Burden Resistor ( 10 x 10 Ω ) , 0.05% , Tc < 3 ppm/°C
• Ø 25mm busbar
1
11A08