Device and core loss characterization method for screening circuit breaker sensors
In accordance with at least one aspect of this disclosure, a system for characterizing core loss for an electronic component can include a core loss module coupleable to a current source, the core loss module including a nest configured to receive the device under test (DUT). In certain embodiments, the system can include an electronic device configured to receive output corresponding to the core loss module and configured to perform at least one operation to determine one or more of core loss, inductance, or permeability associated with the DUT.
1 . A system for characterizing core loss for a device under test (DUT), comprising:
a core loss module coupleable to a current source, the core loss module including a nest configured to receive the DUT, wherein the DUT comprises a current transformer; and
an electronic device configured to receive output corresponding to the core loss module and configured to perform at least one operation to determine a core loss expressed in terms of a resistance associated with the current transformer.
2 . The system of claim 1 , wherein the core loss module further includes a resonant circuit between the current source and the DUT and a signal conditioning module connected to the resonant circuit downstream of the resonant circuit and to the DUT.
3 . The system of claim 2 , wherein the core loss module further includes a data acquisition (DAQ) module, wherein the signal conditioning module is connected to the DAQ module to send conditioned signals to the DAQ module.
4 . The system of claim 1 , further comprising an impedance measurement device coupleable between the core loss module and to the electronic device to receive output signals from the DUT and to send impedance measurement signals to the electronic device.
5 . The system of claim 1 , further comprising a digital multimeter coupleable to the core loss module and to the electronic device to receive output signals from the DUT and to send multimeter measurement signals to the electronic device.
6 . The system of claim 1 , wherein the current transformer is part of a circuit breaker.
7 . The system of claim 1 , wherein the current transformer is configured for ground-neutral detection.
8 . The system of claim 1 , wherein the nest comprises:
a first housing having a first recess configured to receive a first portion of the DUT;
a second housing moveably connected to the first housing and having a second recess configured to receive a second portion of the DUT to retain the DUT to the first housing in a closed state; and
a latch operatively connected to the first housing and the second housing, the latch configured to releasably latch the second housing to the first housing in a closed state.
9 . The nest of claim 8 , wherein the first recess includes a conformal shape to the DUT.
10 . The nest of claim 8 , wherein the first recess includes one or more terminal alignment features configured to align one or more DUT terminals to one or more terminal connections.
11 . The nest of claim 8 , wherein the nest further comprises a hinge connecting the second housing to the first housing.
12 . The nest of claim 11 , wherein the hinge is on an opposite side relative to the latch.
13 . A system, comprising:
a core loss module coupleable to a current source, the core loss module including a nest configured to receive a current transformer;
an impedance meter coupled to the nest, wherein the impedance meter is configured to perform a measurement of impedance associated with the current transformer;
a resistance meter coupled to the nest, wherein the resistance meter is configured to perform a measurement of resistance associated with the current transformer; and
an electronic device configured to determine a core loss associated with the current transformer based on the measurement of resistance performed by the resistance meter and the measurement of impedance performed by the impedance meter.
14 . The system of claim 13 , wherein the current transformer is part of a circuit breaker.
15 . The system of claim 13 , wherein the nest comprises:
a first housing having a first recess configured to receive a first portion of the current transformer;
a second housing moveably connected to the first housing and having a second recess configured to receive a second portion of the current transformer to retain the current transformer to the first housing in a closed state; and
a latch operatively connected to the first housing and the second housing, the latch configured to releasably latch the second housing to the first housing in a closed state.
16 . The nest of claim 15 , wherein the nest further comprises a hinge connecting the second housing to the first housing.
17 . The system of claim 13 , wherein the current transformer is configured for ground-neutral detection.
18 . A system for characterizing core loss for a device under test (DUT), comprising:
a core loss module coupleable to a current source, the core loss module including a nest configured to receive the DUT, wherein the DUT comprises a current transformer and wherein the nest comprises a housing having a recess configured to retain the current transformer; and
an electronic device configured to receive output corresponding to the core loss module and configured to perform at least one operation to determine a core loss associated with the current transformer.
19 . The system of claim 18 , wherein the nest comprises:
a first housing having a first recess configured to receive a first portion of the current transformer;
a second housing moveably connected to the first housing and having a second recess configured to receive a second portion of the current transformer to retain the current transformer to the first housing in a closed state; and
a latch operatively connected to the first housing and the second housing, the latch configured to releasably latch the second housing to the first housing in a closed state.
20 . The nest of claim 19 , wherein the nest further comprises a hinge connecting the second housing to the first housing.