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Measuring Transformers

There are three models of measuring transformers in HYPERSIM®. These are voltage transformers with capacitive coupling, current transformers, and finally voltage transformers with magnetic coupling.

Icons and diagrams of voltage and current transformers

Capacitive Divider

  • C1, C2: Capacitances of voltage divider (farad);
  • Rc, Lc, Cc: Respectively resistance (ohm), capacitance (farad) and inductance (henry) of the tuning circuit. The values of these parameters are chosen so that the resonance frequency of the series impedance on the secondary side is 60 Hz.

Primary Winding Parameters

Number of turns(default: np = 18240)
Rp, LpLeakage resistance (ohm) and inductance (henry)
RmResistance (ohm) representing magnetization losses
CpStray capacitance (farad)


Saturation parameters:

Number of pointsThe value of the current (in ampere) for each segment of the saturation curve. The origin (0.0,0.0) is implied. The number of segments must be equal to the parameter “number of points”
lsatThe value of the flux (in volt-second) for each segment of the saturation curve. The origin (0.0,0.0) is implied. The number of segments must be equal to the parameter “number of points”

Secondary Winding Parameters

Number of turns(default: ns = 100)
Rs, LsLeakage resistance (ohm) and inductance (henry)
R, RL, LLResistances (ohm) and load inductance (henry)


List of Available Signals
At acquisition, the following signals are made available by the sensors:

VOUT(a, b, c)_labelOutput voltage (V)
VMAG(a,b,c)_labelVoltage in magnetization branch (V)
IMAG(a,b,c)_ labelMagnetization current (A)
FLUX(a,b,c)_labelMutual flux in the transformer (V.s)
VLOADSEC(a,b,c,n)_labelLoad voltage on the secondary
VLOADTERT(a,b,c,n)_labelLoad voltage on the tertiary
ILOADSEC(a,b,c,n)_labelLoad current on the secondary
ILOAD TERT(a,b,c,n)_labelLoad current on the tertiary
ILOAD TERT(0)_labelGround current on the tertiary

Control Panel of Measuring Transformers


Figures below show the control panel of voltage transformers with capacitive voltage divider;
Figures below show the control panel of the current transformer and Figures 8 - 42 to 8- 47 show the control panel of the voltage transformer with magnetic coupling;

Control Panel of a Voltage Transformer with Capacitive Voltage Divider (General)

Control Panel of a Voltage Transformer with Capacitive Voltage Divider (General)

Control Panel of a Voltage Transformer with Capacitive Coupling (Saturation)

Control Panel of a Voltage Transformer with Capacitive Coupling (Saturation)


Winding connection in a current transformer (configuration)

Saturation Characteristic of a Current Transformer (Saturation)

Saturation Characteristic of a Current Transformer (Saturation)

Saturation Characteristic of a Current Transformer (Hysteresis)

Saturation Characteristic of a Current Transformer (Hysteresis)

Voltage Transformer with Magnetic Coupling (General)

Voltage Transformer with Magnetic Coupling (General)

Voltage Transformer with Magnetic Coupling (Saturation)

Voltage Transformer with Magnetic Coupling (Saturation)

Figure 8 - 44 Voltage transformer with magnetic coupling (general)

Figure 8 - 45 Voltage transformer with magnetic coupling (configuration)

Voltage Transformer with Magnetic Coupling (Saturation)

Voltage Transformer with Magnetic Coupling (Saturation)

Voltage Transformer with Magnetic Coupling (Hysteresis)

Voltage Transformer with Magnetic Coupling (Hysteresis)

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