FERRORESONANT OVERVOLTAGE PROTECTIVE DEVICE OF MOLDED POTENTIAL TRANSFORMERS IN INSULATED-NEUTRAL POWER NETWORK
FIELD: electrical engineering. ^ SUBSTANCE: windings of three type NOL single-phase potential transformers are connected in star within proposed device; integrated XYZ neutral leads of high-voltage windings and terminals connecting them should withstand test voltage specified for them; primary windi...
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Format: | Patent |
Sprache: | eng ; rus |
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Zusammenfassung: | FIELD: electrical engineering. ^ SUBSTANCE: windings of three type NOL single-phase potential transformers are connected in star within proposed device; integrated XYZ neutral leads of high-voltage windings and terminals connecting them should withstand test voltage specified for them; primary winding of fourth type NOL potential transformer is connected between neutral lead of these transformers and ground and its secondary winding is used for connecting insulated-neutral network ground-fault detection relay. ^ EFFECT: enhanced operating reliability of molded potential transformers and electricity metering efficiency. ^ 1 cl, 2 dwg |
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