CN201540348U - Portable alternating-current withstand voltage testing device of high-voltage electric device - Google Patents

Abstract

The utility model relates to a portable alternating-current withstand voltage testing device of a high-voltage electric device, which comprises a variable frequency power source module, a reactor module, a voltage divider module and an exciting transformer module which are respectively independent. When in use, corresponding modules are assembled to form corresponding testing devices according to needs, and the reactor module is poured in an unyoked vacuum epoxy manner. Because of adopting the technical scheme, the variable frequency power source module, the reactor module, the voltage divider module and the exciting transformer module are respectively independent, and when in use, the corresponding modules are assembled to form the corresponding testing devices according to needs. Besides, single member is small in volume and light in weight, and members can be assembled in parallel connection and series connection according to test requirements so as to realize needed test voltage and capacity.

Description

A kind of portable high-pressure electrical equipment AC voltage withstand test device

Technical field

The utility model relates to a kind of portable high-pressure electrical equipment AC voltage withstand test device, belongs to electrical technology field.

Background technology

In electrical technology field, frequency modulation type series resonance high-pressure test device is a common equipment, the principle of work wiring as shown in Figure 1, alternating current 220V or 380V power supply, convert frequency, ac voltage signal that voltage is adjustable to by the frequency conversion source,, send into the high-pressure series resonant tank that constitutes by reactor L and tested cable Cx through exciting transformer, voltage divider is pure capacitive, is used for experiment with measuring voltage.The frequency conversion source is sent into a lower voltage U e through exciting transformer T to main resonant circuit, regulates the output frequency of frequency converter, when frequency satisfies condition $f=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}}$ The time (L, C are equivalent inductance and electric capacity), circuit promptly reaches resonant condition.U is arranged this moment _CX=QU _eWherein Q is quality factor, and usually Q value under less field voltage Ue, makes the voltage U CX of several Ue of decupling of generation on the test specimen C x tens to up to a hundred.Electric current by test specimen is: I=2 π fC _XU _CXWhen test specimen was carried out withstand voltage test, the frequency conversion source is the output initial voltage earlier, is used for the resonance frequency that frequency sweep is looked for cascade system, and the frequency resolution of frequency sweep is 0.01Hz.System boosts after finding resonance frequency, boosts to select automatic boost mode and manual voltage boosting pattern; After voltage is raised to the setting high pressure, in setting-up time, carry out voltage-tracing and voltage stabilizing, be stable setting voltage on the interior test specimen between assurance at the trial, arrive off-test up to setting-up time.If the test specimen withstand voltage properties has problem and abort, then system differentiates the test interruption source automatically, and performs record; High voltage electric equipment AC voltage withstand test device commonly used now is all-in-one-piece, and is heavier, carries inconvenience.

The utility model content

The utility model purpose is that a kind of portable, modular high voltage electric equipment AC voltage withstand test device is provided in order to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution adopted in the utility model is: a kind of portable high-pressure electrical equipment AC voltage withstand test device comprises variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module; Described variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module are independent separately, during use, as required, select corresponding module to be assembled into corresponding test unit.

Preferably, described reactor module adopts no yoke vacuum epoxy casting.

Because the utilization of technique scheme, the utility model compared with prior art has following advantage:

Because the employing of technique scheme, described variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module are independent separately, during use, as required, select corresponding module to be assembled into corresponding test unit; The single-piece volume is little, in light weight, can by the connection in series-parallel combination, reach needed trial voltage and capacity according to the test needs.

Description of drawings

Below in conjunction with accompanying drawing technical solutions of the utility model are described further:

Accompanying drawing 1 is the fundamental diagram of the utility model portable high-pressure electrical equipment AC voltage withstand test device;

Accompanying drawing 2 is the composition frame chart of the utility model portable high-pressure electrical equipment AC voltage withstand test device;

Wherein: 1, variable-frequency power sources module; 2, reactor module; 3, voltage divider module; 4, exciting transformer module.

Embodiment

Described in the utility model a kind of portable high-pressure electrical equipment AC voltage withstand test device as shown in Figure 1 comprises variable-frequency power sources module 1, reactor module 2, voltage divider module 3, exciting transformer module 4; Described variable-frequency power sources module 1, reactor module 2, voltage divider module 3, exciting transformer module 4 are independent separately, during use, as required, select corresponding module to be assembled into corresponding test unit; Described reactor module 2 adopts no yoke vacuum epoxy casting.

Because the utilization of technique scheme, the utility model compared with prior art has following advantage:

Because the employing of technique scheme, described variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module are independent separately, during use, as required, select corresponding module to be assembled into corresponding test unit; The single-piece volume is little, in light weight, can by the connection in series-parallel combination, reach needed trial voltage and capacity according to the test needs.

Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, or any to move mode dull and stereotyped described in the utility model, all drop within the utility model rights protection scope.

Claims (2)

1. a portable high-pressure electrical equipment AC voltage withstand test device is characterized in that: comprise variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module; Described variable-frequency power sources module, reactor module, voltage divider module, exciting transformer module are independent separately, during use, as required, select corresponding module to be assembled into corresponding test unit.

2. portable high-pressure electrical equipment AC voltage withstand test device according to claim 1 is characterized in that: described reactor module, adopt no yoke vacuum epoxy casting.

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