TH86291A - Systems and methods for interception, prevention and / or explosion detection. And / or a fire of the transformer - Google Patents

Abstract

DC60 (07/10/56) This invention relates to the system. And methods for the prevention of interruption and / or detection of explosion and / or fire in power transformers in advance, ie before the decomposition of the combustible coolant fluid / dielectric oil. This invention involves a system And methods for the prevention of interruption and / or detection of explosion or fire in power transformers in advance, ie before the dissolution of the combustible coolant fluid / dielectric oil.

Claims (4)

1. Systems for interception, prevention and detection of explosion and / or fire generation. Of the power transformer (30) in advance of the decomposition of the combustible coolant fluid (11) or dielectric oil The system consists of: one or more (26) differential current sensing electromechanical relays. For calculating the difference of the input current And the output flow with the highest allowable level and hence A first input will be provided to the control unit (1) if the input current ratio The output current exceeds the preset limit. Where the input and output currents therefor are currents from the high voltage conductors (22) and low voltage conductors (23) of the transformer (30), respectively; One or more Bukholz Relays (18) For the awareness of surge excess oil in transformers (30) and hence A second input is provided to one or more control units (1), circuit breakers (24). For obtaining the input signal from the current sensing electric relay (26) and bukholz relay (18) and hence A third input signal is supplied to one or more control units (1), control unit (1). For receiving the first, second and third input signals from electrical relays, differential currents (26), bukholzlay (18) and such circuit-breakers (24,28) are received respectively and therefore. this Will generate control signals In order to energize the lifting magnet (5) for the discharge of the combustible coolant fluid (11) through the discharge valve (4) and subsequently inert gas from the bottom of the transformer tank (14). ) Via nitrogen release valve (6) for fluid stirring, combustible coolant (11) and tempering And reduced oxygen content for deterrent measures against explosion and / or causing fire in transformers (30) 2. The system in accordance with claim 1 where the transformer (30) has a tank. Power transformers (14) filled with a combustible coolant fluid (11) 3. System as held in claim 1, where the nitrogen release valve (6) injects nitrogen gas. For the coolers And heating temperature 4. The system according to claim 1, where the electrical relay perceives different currents (26) provides a signal. The first input to the control module (1) if the ratio of the input and output currents exceeds 1:40 5. The system, as entitled in claim 1, where control signal generation performs the formation of the control unit. (1) and discharge of the combustible coolant fluid (11) through the discharge valve (4) and, subsequently, the spray of gas from the bottom of the transformer tank (14) will be Operated within a period of 50 to 700 milliseconds. 6. System according to claim 1, where the transformer (30) has been connected to Transformer isolation valve (TCV) (20) and transformer storage tank (21) by means of pipe or conduit (19) for transformer isolation operation (30) when applicable. Mobile The combustible coolant fluid (11) from the transformer storage tank (21) to the transformer tank (14) 7.Methods for interrupting prevention and / or explosion detection and / Or the ignition of the power transformer (30) in advance (before the electric arc generation) by using the system as it holds. Claim 1 where the method includes a procedure for: a) the calculation of the difference of the input and output currents across the transformer (30) with the maximum permissible level by means of a relay. Electricity perceives one or more (26) different currents. And hence A first input signal will be provided to the control unit (1) if the input current to side current ratio Output exceeds the preset limit at which the input current And the aforementioned output current is from the high voltage conductor (22) and the high voltage conductor (23) of the transformer (30), respectively; b) the excess oil surges awareness / detection in the said transformer. By using a bukholz relay (18) and hence a second input signal to the control unit (1) c) a third input signal to the control unit (1) by means of a circuit breaker. (24, 28) while such a circuit breaker receives the input signal from the buechholz relay (18) and the electric relay perceives current (26) d) the generation of a control signal on the basis of the first input signal at The second and third from the electric relay perceive different currents (26), buchholz relays (18) and such circuit breakers whose signals are To the control unit (1) and therefore Will provide energy to the lifting magnet (5) for the discharge of Flows the combustible coolant (11) through the discharge valve (4) and subsequently. Inert gas From the bottom of the transformer tank (14) via nitrogen release valve (6) for stirring, cooling and reducing the oxygen content. For measures against explosion and / or electric burn in transformers (30) 8. The method as claimed in claim 7, where in step (a) the electric relay perceives different currents. (26) Provide the first input signal to the control unit (1) if the ratio of the input and output currents exceeds 1:40 9. The method of claiming claim 7 where, in the procedure (d) Control signal generation Form control unit (1) and discharge of the combustible coolant fluid (11) through the discharge valve (4) and so on. Gas injection from the bottom of the transformer tank (14) was performed within a period of 50 to 700 milliseconds 1 0. The method according to claim 7, where in step (d ) Nitrogen release valve (6) Nitrogen injection for coolant stirring And make the oxygen content reduced by 1 1. Method according to claim 7, where in step (d) the transformer (30) is separated by means of a separate valve for the transformer storage tank (TCV) ( 20) When moving like The fluid flow of the combustible coolant (11) from the transformer storage tank (21) to the transformer tank (14) is detected 1. 2. The transformers (30) consist of a system as claimed in claim 1 for interception, prevention and / or explosion detection. And / or transformer fire (30) 1 3. Systems for prevention, interruption and / or explosion detection. And / or causing The fire of the transformer (30) is significantly ahead. Described here With reference to the illustration 1 4.Methods for prevention of interruption and / or explosion detection. And / or causing The fire of the transformer (30) is significantly ahead. Described here With reference to the illustration