Item no. 855-9150/2000-1251

Rogowski coil; Primary rated current 4000 A; Output signal 22.5 mV per kA; Cable length: 1.5 m; Feedthrough for measurement conductor 125 mm

Item no. 855-9150/2000-1251

Short description:

These Rogowski coils are closed-air coils featuring a non-magnetic split core that can be connected to WAGO products (857-552; 750-495/000-002; 2857-570/024-000).

Easy mounting of the Rogowski coils allows existing systems to be retrofitted without time-consuming installation or process interruption.
  • Rated insulation voltage: 1000 V Cat. III/600 V Cat. IV
  • Accuracy class: 0.5 (per EN 61869-2)
  • Protection type: IP67
  • Measurement coil diameter: 70, 125 or 175 mm
  • Length of signal lines: 1.5 m or 4.5 m
  • Surrounding air temperature: −40 … +80°C
  • Sealable bayonet connector
  • Anchor points for cable ties


The specifications for the primary rated current refer to a combination with the WAGO Modules (857-552 and 750-495/000-002).

Rogowski technology allows the coils to measure a wide primary current range of up to 10,000 A without loss of accuracy, because there are no saturation effects.

The requirements for standards EN 61869-1, EN 61869-2, EN 61869-6 and EN 61869-10 are only partially met, as there are fundamental differences with current transformers for a Rogowski coil.

Product details

Technical data
Input – current transformer
Primary rated current 4000 A (in combination with WAGO products)
Rated short-time thermal current Ith 300 kA at 50 Hz
Rated frequency 50 … 60 Hz
Mutual inductance M 72.14 nH
Output – analog
Sensitivity 22.5 mV/kA at 50 Hz
Output signal (max.) 30 V
Signal processing
Limit frequency 373 kHz
Measurement error
Accuracy class 0.5
Positioning error ±0.75 %
Safety and protection
Rated insulation voltage 1000 VACrms (Cat. III); 600 VACrms (Cat. IV)
Impulse withstand voltage (1.2/50 μs) 12.8 kV
Protection type IP57
Test voltage
Voltage for isolation test AC 7.4 kV; 50 Hz; 1 min
Connection data
Feedthrough for measurement conductor Ø 125 mm
Physical data
Cable length 1.5 m
Mechanical data
Mounting type Split-core current transformer (suspended)
Material data
Weight 130 g
Environmental requirements
Surrounding air temperature (operation) -40 … 80 °C
Surrounding air temperature (storage) -40 … 80 °C
Relative humidity  90% (without condensation)
Operating altitude (max.) 2000 m
Standards and specifications
Conformity marking CE
Standards/Specifications EN 61010-1; EN 61010-2-32; EN 61869-1; EN 61869-2; EN 61869-6; EN 61869-10; UL 61010-1
Commercial data
Packaging type bag
Country of origin CH
GTIN 4055143419208
Customs tariff number 90303370000
Approvals / Certificates
Additional Approval Text
Certificate name
Approval: UL
Underwriters Laboratories Inc.
Additional Approval Text UL 61010-2-032
Certificate name: E499682
Compatible products
Installation Notes
3 Images
Bayonet connector:
Robust and durable
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