6
70
855 Series
Rogowski Coils RT 500
27.4
15.7
Ø5
34.4
1500 / 3000
Ip
black
-Vs
white
+Vs
Output voltage (open output, no load)
- dynamic
- sinusoidal signal
Vout = M x dIp/dt
Vout = 2 x π x M x f x Ip AC
Example:
Vout = 2 x π x 0.064 μH x 50 Hz x 500 A = 10.05 mV
Short description:
The Rogowski coil is a closed-air coil with non-magnetic split core, placed
around a conductor or a current bar.
The magnetic field produced by the AC current flowing through the conductor
induces an output voltage in the coil.
This measurement procedure provides galvanic isolation between the primary
circuit (power) and secondary circuit (measurement).
Easy placement of the Rogowski coils allows existing systems to be retrofitted
without time-consuming installation or process interruption.
The Rogowski coil can be used together with the 789-652 Signal Conditioner
or the 857-552 Rogowski Transducer.
Features:
• Split-core style coil for easy installation
• Ø 55 mm coil aperture for non-contact measurement
• 1.5 m or 3 m output cable
• Insulated plastic case to UL 94-V0
Description
Rogowski Coil RT 500,
1.5 m output cable
Rogowski Coil RT 500,
3 m output cable
Item No.
855-9100/500-000
855-9300/500-000
Pack.
Unit
1
1
Technical Data
Accuracy and dynamic performance:
Linearity error
Temperature coefficient
Positioning error
none
30 ppm/K, related to transfer ratio M
855-9100/500-000: max. 0.65 %
855-9300/500-000: max. 0,80 %
(considering a primary conductor of at
least Ø 15 mm perpendicular to the coil)
300 V
rms
(between primary conductor and ground)
3.5 kV
rms
AC / 50 Hz / 1 min
6.5 kV
6 mm / 6 mm
600 V (plastic parts)
IP2X
855-9100/500-000: 1.5 m
855-9300/500-000: 3 m
-10 °C ... +65 °C
-25 °C ... +70 °C
85 g
Approvals
Conformity marking
Standards/Specifications
1
IEC 61010-1:2001 (2nd edition),
IEC 61010-2-032:2002,
IEC 61010-031:2002 + A1:2008
Safety and protection:
Nominal isolation voltage
Voltage for isolation test
Impulse withstand voltage (1.2/50 μs)
Adjacent contacts
Comparative Tracking Index (CTI,
Degree of protection
General specifications
Cable length
Ambient operating temperature
Storage temperature
Weight
Technical Data
Electrical data:
Primary rated current I
pN
Coil inductance (± 5 %)
Coil resistance
500 A
rms
125 μH
40 Ω
(at 20 °C ambient operating temperature,
typ.)
0.064 μH
(WAGO provides uncalibrated coils with
5 % tolerance)
Example shown above
10.05 mV at I
pN
= 500 A, sinusoidal,
50 Hz (open output, no load)
700 kHz (open output, no load)
Transfer ratio M
Output signal
Max. operating frequency
WAGO Kontakttechnik GmbH & Co. KG
Subject to design changes
21.11.2012
Postfach 2880 - D-32385 Minden
Hansastr. 27 - D-32423 Minden
Ømax 55
Tel.: +49(0)571/887-0
E-Mail: info@wago.com
Fax: +49(0)571/887-169
www.wago.com
Ø5
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