SMC Networks raptor User Manual page 56

Raptor
burden (cosine phi). The ratio must always be measured at a burden that must be
known, as it varies with this.
Template configuration:
The template is configured as follows:
•
Generator: pass-through turn
• Time display: As a timer in seconds (8 s, maximum duration of high current
injection)
•
Secondary current meter input A1in in Amps. Auto mode (current in CT
secondary)
•
Voltage meter in secondary input V2in in Volts. Auto mode (Voltage drop in
CT bushings)
•
Phase angle meter between currents A1in and Io. (Polarity and angle error
of transformer)
•
Phase angle meter between voltage measured in V2in and current
measured inA1in (phase angle of burden connected to CT)
•
Apparent Power (S) Meter (V2A1) using inputs V2in and A1in, in VA.-
(Apparent power in burden connected to CT)
•
Cosine phi power factor meter (V2A1). (Power factor of the burden
connected to CT)
•
Impedance (Z) meter (V2A1) in ohms. (Total impedance Z of burden
connected to CT)
•
I0/A1 ratio meter. It presents the reading in terms of Current in
Primary/Current in Secondary. If the theoretic ratio of the CT has been
entered during the configuration of this meter, in terms of nominal primary
current and nominal secondary current, this meter will present the primary
current nominal value entered and the corrected value via the measurement
of the respective nominal secondary current, regardless of what were the
injected and measured currents, thus indicating the ratio error.
Connections:
Connect the output of the pass-through turn
to each side of the CT Primary. The two
bushings of the primary may be indicated as
P1, P2, or in some cases as H1, H2. S1
and S2 correspond
indication in the first case, and X1 and X2 in
the second case. As a general rule, when
you connect the primary to the pass-through
turn and the secondary to be measured at
the measurement input this must be done as
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to this primary
P2
S2
S1
Burden
P1