CN110187269B - Method and device for reducing energy consumption in relay full-load test - Google Patents
Method and device for reducing energy consumption in relay full-load test Download PDFInfo
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- CN110187269B CN110187269B CN201910543230.5A CN201910543230A CN110187269B CN 110187269 B CN110187269 B CN 110187269B CN 201910543230 A CN201910543230 A CN 201910543230A CN 110187269 B CN110187269 B CN 110187269B
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
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- 238000005265 energy consumption Methods 0.000 title claims description 15
- 238000002474 experimental method Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
Abstract
The device comprises a relay K and a load which are connected in series, wherein the relay K and the load are connected with a power supply Y, the load is a resistor R, two ends of the resistor R are connected with a switch S in parallel, and the device is used for carrying out the full-load test, and the method comprises the following specific steps: the relay K is in an open state, the switch S is in an open state, the relay K is conducted, the relay K, the resistor R and the power supply Y form a first closed loop, the relay K is conducted and kept in S3, the resistor R is in a normal non-starting energy-saving mode working mode when the switch S is disconnected, the switch S is closed by the S32, the relay K, the switch S and the power supply Y form a second closed loop, the resistor R is short-circuited, the switch S is turned off when the relay S3 is nearly ended, and the relay K is turned off to S31 and S4.
Description
Technical Field
The invention relates to the technical field of relay detection, in particular to a device and a method for reducing energy consumption in a relay full-load test.
Background
The relay is a switch component, voltage and current impact caused by switching on and switching off must be borne in operation, and power consumption caused by internal resistance caused by maintaining current after switching on must also be borne, in order to ensure the reliability of the relay, a full load test is usually required to be carried out on the relay, according to relevant standards, the full load test of the relay with high reliability level must be carried out, the current full load test of the relay commonly used at present refers to that the relay is serially connected with a load under the condition of rated voltage and current and is powered on, then the relay is controlled to carry out continuous operation of conducting, maintaining and switching off for a certain time interval, and the purpose of the full load test of the relay is as follows: ensuring that the relay is able to withstand the corresponding voltage current surge and power consumption in these three operations.
However, in the prior art, the device for the relay full load test is less, and has the problems of large load power consumption and high total test energy consumption, and the main reasons are that in three actions of on, on-hold and off, the time of the on-hold stage is longest, the output power of the power supply is largest, at this time, the internal resistance of the relay is small, the internal power consumption of the relay is low, the main power of the power supply is output to the load, so that the problem of large load power consumption exists, and the load generates large heat due to the consumption of the main power, therefore, an efficient heat dissipation device is required to be arranged on the load to control the load to be kept at a safe temperature, and the use of the heat dissipation device further causes the complexity problem of the device; in the prior art, an electronic load is often adopted to carry out a full load test, the electronic load has the defect of response delay, and the problem of impact attenuation born by the relay is extremely easy to occur due to the influence of the delay of the electronic load in the process of electrifying, electrifying and electrifying the relay.
As the production capacity of the relay becomes larger and larger, the rated voltage and current of a single relay become larger and the difficulty of load test becomes larger and larger, and for mass production, a mode of testing more relays once is adopted, so that the power consumption and the load heat dissipation of the power supply bring about larger cost, and especially the total power of the power supply, the load heat dissipation capacity and the total test energy consumption required for carrying out the mass production full-load test on the relay with larger rated voltage and current reach the practically intolerable degree, and the prior art cannot solve the serious problem.
Disclosure of Invention
Aiming at the problems of fewer devices, high load power consumption and low total test energy consumption in the prior art for the relay full-load test, the invention provides the relay full-load test device which does not need to be provided with a heat dissipation device, has simple and reasonable structural design, and can greatly reduce the total power of a power supply and the total test energy consumption.
The relay full-load test device comprises a relay K and a load which are connected in series, wherein the relay K and the load are connected with a power supply Y, and the relay full-load test device is characterized in that the load is a resistor R, and two ends of the resistor R are connected with a switch S in parallel.
The power supply Y is a programmable power supply with a current limiting function, and the switch S is a programmable switch;
one switch end of the relay K is connected with the positive electrode of the power supply Y, the other switch end of the relay K is respectively connected with one end of the resistor R and one end of the controllable switch S, and the other end of the resistor R and the other end of the controllable switch S are connected with the negative electrode of the power supply Y;
the relay K is a direct-current relay or an alternating-current relay;
the relay K is an electromagnetic type traditional relay, a solid-state relay and a high-power contactor.
A method for carrying out full load test and reducing power consumption by utilizing the device comprises the following specific steps: s1, starting an experiment, wherein a switch in a relay K is in an open state, the switch S is in the open state, the voltage of a power supply Y is set to be U, and the voltages at two ends of the relay K are set to be U k Voltage U across resistor R R The voltage across switch S is U S At this time, the voltage U is the rated voltage U1 of the power supply Y, and the voltage U of the relay K k =u1, voltage across resistor R U R =U S =0；
S2, the relay K is conducted, and a loop formed by the power supply Y, the relay K and the resistor R is conducted to form a first closed loop;
s3, the relay K is conducted and maintained;
s4, the relay K is turned off; before the relay K is turned off, the switch S is turned off to form a first closed loop, and then the relay K is turned off to turn off the relay K under the conditions of full rated voltage U and full rated current I1, and the voltage of the power supply Y is set to be U, and the voltage at two ends of the relay K is set to be U k Voltage U across resistor R R The voltage across switch S is U S At this time, the voltage U is the rated voltage U1 of the power supply Y, and the voltage U of the relay K k =u1, voltage across resistor R U R =U S =0；
The method is characterized in that in the step S3, in the conduction and maintenance stage of the relay K, the resistor R has two working modes: normal non-start energy saving mode, normal non-start energy saving mode means resistance R does not short circuit, start energy saving mode means resistance R is short circuit, specifically:
s31, when the switch S is opened, the resistor R is in a working mode of normal non-starting energy-saving mode, the power supply Y is in a normal current mode, and the current I1 in the first closed loop formed by the power supply Y, the relay K and the resistor R is set, namely the amount of the power supply YThe constant current I1, the voltage at two ends of the resistor R is the structure R of the conduction circuit I1 multiplied by the resistor, namely U R At this time, voltage U is rated voltage U1, voltage U of relay K k =U1-U R U, i.e. U k =U1-I1*R；
S32, the switch S is closed, the relay K and the switch S are conducted, a second closed loop is formed with the power supply Y, the resistor R is short-circuited, the energy-saving mode is started, the current in the second closed loop is I2, the current I2 is the current limiting current after the power supply Y starts the current limiting mode, I2 is more than I1, and the voltage U of the resistor R is higher than the voltage U of the resistor R R The voltage U of the power supply Y is the second closed loop conduction maintaining voltage U', the conduction voltage drop U of the relay K k =U'。
The method is further characterized in that in the steps S1-S4, the power supply Y is in a continuous starting state, and the power supply Y comprises two control modes: normal current mode, current limiting mode, the power supply Y is in the normal current mode and means that the power supply Y is in a full power supply state with continuous rated voltage U1 rated current I1, the power supply Y is in the current limiting mode and means that the voltage of the power supply Y is reduced from the rated voltage U to the conduction maintaining voltage U' of the second loop, and the conduction voltage drop U of the relay K k =u', the rated current I1 rises to the limit current I2;
in step S2, in S4, the on or off condition of the relay K is: the power supply Y is in a condition of full rated voltage U1 and full rated current I1; in the step S3, the current in the normal non-start energy saving mode is the rated current I1, and the current is limited by the current I2 in the start energy saving mode.
The invention has the following beneficial effects: the device and the method are applied to a relay full-load test, and the resistor R is selected as a load in the full-load test, so that response of the resistor R to voltage and current is real-time, response delay caused by similar electronic loads is avoided, and impact generated by the applied voltage and current when the relay acts is prevented from weakening due to the load delay; the switch S is connected in parallel with the two ends of the resistor R, in the process of conduction and maintenance, the switch S can be closed, the energy-saving mode is started, the short circuit of the resistor R is realized, at the moment, the resistor R does not consume power any more, the conduction voltage of the relay K, namely the voltage after the power supply Y is reduced, at the moment, the voltage at the two ends of the relay K is still kept to be the conduction voltage drop, and the resistor R is short-circuited, so that the resistor R does not consume power and cannot rise in temperature due to long-time work, and a heat dissipation device is not required to be arranged for the resistor R, so that the total power of the power supply and the total experimental energy consumption are greatly reduced; the device can be used in the mass production process of the relay, and the resistor R does not consume power in the conduction and maintenance stage of the relay K and does not need to be provided with a heat dissipation device, so that the whole device and the experimental cost can be effectively reduced, and the full-load test requirement of mass production of the relay with larger rated voltage current can be met.
Drawings
FIG. 1 is a schematic circuit diagram of a full load test apparatus of the present invention;
fig. 2 is a graph of voltage-current surge experiment of the relay K of the present invention in a normal non-start energy saving mode;
fig. 3 is a graph of voltage-current surge experiment of the relay K of the present invention when the energy-saving mode is started;
FIG. 4 is a voltage graph of the power supply Y of the present invention in a normal inactive energy saving mode;
FIG. 5 is a graph showing the voltage of the power supply Y of the present invention when the power saving mode is started;
FIG. 6 is a voltage-current graph of the resistor R in the normal non-activated energy saving mode according to the present invention;
fig. 7 is a voltage-current graph of the resistor R of the present invention when the energy saving mode is started.
Detailed Description
As shown in fig. 1, a relay full-load test device comprises a relay K and a load which are connected in series, wherein the load is a resistor R, a coil end of the relay K is connected with a positive electrode of a power supply Y, a switch end of the relay K is respectively connected with one end of the resistor R and one end of a controllable switch S, and the other end of the resistor R and the other end of the controllable switch S are connected with a negative electrode of the power supply Y; the relay K is a direct current relay, the power supply Y is a programmable power supply with a current limiting function, the switch S is a programmable switch, and the power supply Y, the switch S and the relay K can all adopt the prior conventional technology.
A method for carrying out full load test and reducing power consumption by utilizing the device comprises the following specific steps:
s1, starting an experiment, wherein a switch in a relay K is in an open state, the switch S is in the open state, the voltage of a power supply Y is set to be U, and the voltages at two ends of the relay K are set to be U k Voltage U across resistor R R The voltage across switch S is U S The voltage detection device is adopted to obtain the voltage U of the power supply Y and the voltage U at two ends of the relay K k Voltage U across resistor R R The voltage U is the rated voltage U1 of the power supply Y, and the voltage U of the relay K k =U1-U R Voltage U across resistor R R =U S Because the switch in the relay K is in an open state, the voltage of the external power supply Y is totally applied to the two ends of the switch in the relay K, the switch connected in parallel to the two ends of the load resistor R is also in an open state, the current on the load resistor R is extremely small, and the current is only the leakage current I of the switch S Leakage device ，I Leakage device Near zero, can be ignored, so that the voltage U of the power supply Y is mainly applied across the switch inside the relay K, i.e. U k =u1, the voltage across resistor R is close to zero, i.e. U R =U S =0；
S2, controlling the relay K to be conducted through a control device, conducting the relay K and the resistor R, and forming a first closed loop with the power supply Y, wherein the conducting is performed under the condition that the external power supply Y is at the full rated voltage U1 and the full rated current I1;
s3, the control device controls the relay K to be in a conduction maintaining stage, the power supply Y is in a continuous power supply state, even if the relay K is in a continuous conduction state, the power supply Y at the moment is in a normal current mode, namely in a rated voltage U1 rated current I1 power supply state, even if the resistor R is in a full power state continuously approaching to the rated voltage, and in the conduction maintaining stage, the resistor R has two working modes: normal inactive energy saving mode, active energy saving mode:
s31, when the switch S is disconnected, the resistor R is in a normal non-started energy-saving mode working mode, even if the relay K and the resistor R are in a continuous conduction state, after the conduction is stable, the current I1 in the first closed loop is obtained through the current detection device, the voltage of the power supply Y is the rated voltage U1,voltage U at two ends of switch inside relay K K In a lower conduction voltage drop state, the current in the first closed loop reaches the rated current I1 under the limit of the load resistor R, and the voltage U on the load resistor R R The conduction voltage drop U of the relay K is subtracted from the power supply voltage U K Voltage U across resistor R entering the on hold stage R ，U R =R*I1，U K =U1- U R U, i.e. U K =U1- R*I1；
S32, closing the switch S, conducting the relay K and the switch S, forming a second closed loop with the power supply Y, shorting the resistor R, starting to rise loop current without the limitation of the load resistor R on current, immediately triggering the current limiting function set by the external power supply Y, immediately reducing the output voltage of the power supply Y until the output voltage is reduced to the conducting voltage drop of the relay, keeping the loop current on the set current limiting current I2, obtaining the current in the second closed loop, namely the current limiting current I2, and measuring the voltage U at two ends of the resistor R through the voltage detection device R Voltage U across relay K K At this time, the output power of the power supply Y is greatly reduced except that the current flowing through the relay K is slightly increased, the main power consumption only needs to maintain the conduction and maintenance state of the relay K, the power output to the resistor R becomes zero due to the energy-saving mode started by the load resistor R, the voltage of the power supply Y is reduced to the limit voltage U', the current I2 is more than I1, and the voltage U at two ends of the resistor R is higher than the limit voltage U R Reduce to zero, U R =0, the voltage across the relay K drops, at which time the voltage across the switch S is extremely small and can be recorded as zero, therefore, at which time the voltage U across the relay K K =U'，U K The conduction voltage drop of the switch K is far lower than the rated voltage U1, the set value of the normal current limit I2 is 5% -10% higher than the rated current I1, and the actual set value depends on the current limit precision requirement of the power supply Y; the output power U 'I2 of the power supply Y in the starting energy-saving mode is far lower than the output power U' I1 of the power supply Y in the non-starting energy-saving mode;
in steps S31 and S32, the switch S may be opened or closed by external force control, such as manual control, or may be controlled by an existing program control technique;
s4, the relay K is controlled to be turned off through the control device, the parallel-connected switch of the load resistor R is turned off, the current limiting current I2 on the loop begins to decline, the current limiting function of the power supply Y is withdrawn, at the moment, the loop current is restored to the rated current I1 determined by the load resistor R, the voltage on the load resistor R is restored to be close to the rated voltage, at the moment, the output of the external power supply Y is restored to the rated voltage U1 and the rated current I1, the main power is output to the load resistor R, and the turn-off condition of the relay K is realized under the full rated voltage U1 and the full rated current I1 of the power supply Y. So far, the relay completes one test period of whole conduction, conduction maintenance and turn-off; the control devices for controlling the on, the holding and the off of the relay K in the steps S1-S4 can all adopt the prior art, the prior conventional program control driving device can be adopted to control the relay K, and each stage can be automatically controlled according to the time sequence requirement in the control process;
the voltage detection device in this embodiment is a voltmeter, the current detection device is an ammeter, the power detection device is a power meter, the voltage U of the power supply Y and the voltage U of the resistor R R Voltage U of relay K K The current I1 and the current limiting current I2 can be detected by the ammeter, and the output power of the resistor R, the relay K and the voltage Y can be detected by the power meter;
in fig. 2, the voltage and current surge experiment graphs of the relay K and the power supply Y at the starting moment, the conduction maintaining moment and the closing moment when the energy-saving mode is not started normally are shown, the vertical axis represents the voltage and current U/I, the horizontal axis represents the conducting, conduction maintaining and closing working phases of the relay, the curve a represents the changing conditions of the voltage U and the current I of the power supply Y at the starting moment, the conduction maintaining and the closing moment, the curve B represents the changing conditions of the voltage at the starting moment, the conduction maintaining and the closing moment of the relay K, the curve C represents the changing conditions of the current at the starting moment, the conduction maintaining and the closing moment of the relay K, and the voltage U and the current I of the relay K at the starting moment rapidly rise and the voltage U and the current I at the closing moment rapidly fall;
fig. 3 is a graph of a voltage and current U/I surge experiment at the starting moment, the conducting maintaining moment and the closing moment of the relay K in the starting energy-saving mode, wherein a vertical axis represents the U/I voltage and current, a horizontal axis represents the working stages of the starting moment, the conducting maintaining moment and the closing moment of the relay, a curve D represents the voltage U change condition at the starting moment, the conducting maintaining moment and the closing moment of the relay K, a curve E represents the current change condition at the starting moment, the conducting maintaining moment and the closing moment of the relay K, and as can be seen from the graph, the current I of the relay K at the starting moment rapidly rises and the voltage U rapidly drops, and the voltage U at the closing moment rapidly rises and the current I rapidly drops, wherein broken lines at the top angles at the two sides of the upper part of the curve E respectively represent the current change condition of the relay K when the switch S is opened and the switch S is closed;
fig. 4 is a voltage graph of the power supply voltage in a normal non-starting energy-saving mode, wherein the vertical axis represents the power supply voltage U, the horizontal axis represents the conducting, conducting maintaining and closing working phases of the relay, the curve a represents the change condition of the voltage U of the power supply Y along with the moment of starting, conducting maintaining and closing the relay K, and the power supply output voltage in the mode is kept unchanged in three phases and is the rated voltage; fig. 5 is a voltage graph of the power supply voltage in the starting energy-saving mode, wherein the vertical axis represents the power supply voltage U, the horizontal axis represents the conducting, conducting maintaining and closing working phases of the relay, and the curve F represents the variation condition of the power supply voltage along with the moment of opening, conducting maintaining and closing the switch S when the switch S is opened, the switch S is kept open and the switch S is closed; fig. 6 is a graph of voltage and current U/I of the resistor R in a normal non-start energy-saving mode, wherein the vertical axis represents voltage U and current I of the resistor R, the horizontal axis represents the working phase of the relay at the moment of opening, conduction and holding and closing, the curve G represents the variation of the voltage of the resistor R with the opening, conduction and holding and closing of the relay K, and the curve H represents the variation of the current I of the resistor R with the opening, conduction and holding and closing of the relay K; fig. 7 is a voltage-current graph of the resistor R in the starting energy-saving mode, wherein the vertical axis represents the voltage and current U/I of the resistor R, the horizontal axis represents the conducting, conducting and holding, closing working phases of the relay K and the opening and closing conditions of the switch S, the curve I represents the changing conditions of the voltage at two ends of the resistor R with the opening, opening and holding and closing conditions of the switch S when the relay K is opened, conducting and holding and closing, and the curve J represents the changing conditions of the current of the resistor R with the opening, opening and holding and closing conditions of the switch S when the relay K is opened, conducting and holding and closing;
in the method, from the perspective of a relay, the voltage and current conditions are not changed when the relay is turned on and turned off, the test strength is unchanged, and only the current in the on-hold stage is slightly increased, so that the test strength in the stage is slightly increased, the strength of the whole load test is not influenced, and the strength requirement of relevant standards on the load test is met; the method can greatly reduce the output power of the power supply and the power consumption of the load in the conduction and maintenance period of the relay for the power supply and the load in the loop, thereby greatly reducing the energy consumption required by the load test, greatly simplifying the power condition and the heat dissipation condition required by the relay with various voltage and current specifications when the relay is subjected to mass production, greatly reducing the test cost, meeting the general requirement of energy conservation and having obvious economic and social benefits. The method is suitable for not only the direct current relay but also the alternating current relay, and only the program-controlled power supply needs to adopt the existing corresponding alternating current power supply. Suitable relays K include electromagnetic conventional relays, as well as solid state relays, and high power contactors including high voltage and high current.
Claims (7)
1. The method for reducing the energy consumption of the full-load test of the relay is carried out by using a full-load test device of the relay, wherein the full-load test device of the relay comprises a relay K and a load which are connected in series, and the relay K and the load are connected with a power supply Y;
the method comprises the following specific steps: s1, starting an experiment, wherein a switch in a relay K is in an open state, the switch S is in the open state, the voltage of a power supply Y is set to be U, and the voltages at two ends of the relay K are set to be U k Voltage U across resistor R R The voltage across switch S is U S At this time, the voltage U is the rated voltage U1 of the power supply Y, and the voltage U of the relay K k =u1, voltage across resistor R U R =U S =0；
S2, the relay K is conducted, and a loop formed by the power supply Y, the relay K and the resistor R is conducted to form a first closed loop;
s3, the relay K is conducted and maintained;
s4, the relay K is turned off; before the relay K is turned off, the switch S is turned off to form a first closed loop, and then the relay K is turned off to turn off the relay K under the conditions of full rated voltage U and full rated current I1, and the voltage of the power supply Y is set to be U, and the voltage at two ends of the relay K is set to be U k Voltage U across resistor R R The voltage across switch S is U S At this time, the voltage U is the rated voltage U1 of the power supply Y, and the voltage U of the relay K k =u1, voltage across resistor R U R =U S =0；
In step S3, in the relay K on-hold phase, there are two modes of operation of the resistor R: normal non-start energy saving mode, normal non-start energy saving mode means resistance R does not short circuit, start energy saving mode means resistance R is short circuit, specifically:
s31, when the switch S is disconnected, the resistor R is in a working mode of normal non-starting energy-saving mode, the power supply Y is in a normal current mode, the current I1 in a first closed loop formed by the power supply Y, the relay K and the resistor R is set, namely the rated current I1 of the power supply Y, the voltage U of the power supply Y is the rated voltage U1, and the voltages at two ends of the resistor R are the structures R of the conducting circuit I1 multiplied by the resistor, namely U R At this time, voltage U is rated voltage U1, voltage U of relay K k =U1-U R U, i.e. U k =U1-I1*R；
S32, the switch S is closed, the relay K and the switch S are conducted, a second closed loop is formed with the power supply Y, the resistor R is short-circuited, the energy-saving mode is started, the power supply Y is converted into the current-limiting mode, the current in the second closed loop is I2, the current I2 is the current-limiting current after the power supply Y starts the current-limiting mode, I2 is more than I1, and the voltage U of the resistor R is higher than the voltage U of the resistor R at the moment R The voltage U of the power supply Y drops to the conduction maintaining voltage U' of the second closed loop, the conduction voltage drop U of the relay K k =U'。
2. The method for reducing energy consumption in a full-load test of a relay according to claim 1, wherein the power supply Y is a programmable power supply with a current limiting function, and the switch S is a programmable switch.
3. The method for reducing energy consumption in a full-load test of a relay according to any one of claims 1 or 2, wherein one end of a switch of the relay K is connected with the positive electrode of the power supply Y, the other end of the switch of the relay K is respectively connected with one end of a resistor R and one end of a controllable switch S, and the other end of the resistor R and the other end of the controllable switch S are connected with the negative electrode of the power supply Y.
4. A method for reducing energy consumption in a full load test of a relay according to claim 3, wherein the relay K is a dc relay or an ac relay.
5. The method for reducing energy consumption in a full-load test of a relay according to claim 3, wherein the relay K is an electromagnetic type traditional relay, a solid state relay or a high-power contactor.
6. The method for reducing energy consumption by using the relay full load test as set forth in claim 1, wherein in the steps S1 to S4, the power source Y is in a continuous start state, and the power source Y includes two control modes: normal current mode, current limiting mode, the power supply Y is in the normal current mode means that the power supply Y is in a full power supply state with continuous rated voltage U1 rated current I1, the power supply Y is in the current limiting mode means that the voltage of the power supply Y is reduced from the rated voltage U to the limited voltage U', and the rated current I1 is increased to the current limiting current I2。
7. The method for reducing power consumption in full-load test of relay according to claim 6, wherein in step S2, the on or off condition of relay K in S4 is: the power supply Y is in a condition of full rated voltage U1 and full rated current I1; in the two modes in step S3, the current in the normal non-start energy saving mode is the rated current I1, and the current is limited I2 in the start energy saving mode.
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