CN201430417Y - Automatic anti-burnout protection device of low-voltage distribution transformer - Google Patents
Automatic anti-burnout protection device of low-voltage distribution transformer Download PDFInfo
- Publication number
- CN201430417Y CN201430417Y CN2009201465778U CN200920146577U CN201430417Y CN 201430417 Y CN201430417 Y CN 201430417Y CN 2009201465778 U CN2009201465778 U CN 2009201465778U CN 200920146577 U CN200920146577 U CN 200920146577U CN 201430417 Y CN201430417 Y CN 201430417Y
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- CN
- China
- Prior art keywords
- automatic
- transformer
- temperature
- low
- contactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an automatic anti-burnout protection device of a low-voltage distribution transformer. An infrared thermometric probe is aligned to a portion of the transformer with fast temperature rise, a wire conductor is connected with an automatic temperature controller correspondingly, a connecting terminal of an automatic control switch is in series connection with a circuit connected closely between coils of a phase-discriminating and amplitude-discriminating leakage relay and an alternating current contactor, the temperature of the automatic temperature controller is set within a critical temperature value of the transformer, when the temperature of windings of the transformer is raised to or approaches the critical temperature value, the automatic temperature controller can start alarm indication and cut off power on the coil of the alternating current contactor to force the alternating current contactor to trip so as to cut off load on the low voltage side, and when the temperature is lower than the critical temperature value, power supply of the low-voltage side can be recovered automatically, thereby guaranteeing the transformer against burning out by overhigh temperature inside. The automatic anti-burnout protection device keeps original functions, saves labor and is low in cost, safe and reliable in use and the like.
Description
Technical field:
The utility model relates to a kind of protective device of low voltage distribution transformer, the anti-automatically protective device that burns of especially a kind of transformer thereby heating former because of overload operation etc.
Background technology
I the application by Chinese patent publication number ZL 200820002002.4; open day on April 1st, 2009; the name of utility model is called the protective device of low voltage distribution transformer; this application discloses a kind ofly conducts to automatic control transformer temperature rise device with the temperature-sensing element that inserts in the transformer thermometer hole; be unlikely to burn transformer because of overload operation and line fault short circuit etc. causes the anxious huge intensification of winding current overcurrent heating; avoid causing economic loss, but that this kind mode is used is single.
The utility model content:
The purpose of the utility model is very the deficiency that above-mentioned prior art is existed and provides the anti-automatic safety device that burns of a kind of low voltage distribution transformer to be provided with in addition.It comprises existing distribution transformer and high and low voltage electric distribution equipment, automatic temperature control device, only needs that the temperature-sensing element in original insertion transformer thermometer hole is replaced by infrared temperature probe and gets final product.
The utility model is achieved in that aims at the higher position of transformer temperature rise with infrared temperature probe, with the corresponding connection of lead with automatic temperature control device, automatic control switch in order to automatic control circuit on the automatic temperature control device is serially connected in the circuit of phase-detecting amplitude-detecting leak relay and A.C. contactor two line bag closures, makes the line bag on the A.C. contactor be subjected to dual control.The maximum temperature of automatic temperature control device is limited to the critical temperature value that transformer can bear, so be formed on the transformer temperature rise normally at present, automatic control switch is in closure state, but the phase-detecting amplitude-detecting leak relay still keeps original would trip function during Leaked Current of Line to Ground.When causing the anxious huge intensification of overcurrent winding when transformer overload or line fault short circuit, the infrared temperature probe of aiming at transformer conducts its temperature signal to automatic temperature control device at any time and gives number and shows, when temperature is raised near critical temperature, automatic temperature control device will start AIS, and warning operator is adjusted load immediately to guarantee the normal operation of transformer.If under unattended situation; the transformer internal temperature will continue to raise; thermostat will send driving command when rising to critical temperature value; order about the automatic control switch action; thereby cut off the closed circuit between phase-detecting amplitude-detecting leak relay and the A.C. contactor line bag; until forcing the A.C. contactor tripping operation to disconnect the load of low-pressure side; make transformer be in Light Condition; the inner winding temperature of transformer this moment will descend gradually; when dropping to the subcritical temperature value; automatic temperature control device will send driving command; make the closed power supply of connecting A.C. contactor line bag of automatic control switch, make the A.C. contactor adhesive, make transformer recover normal powered operation state; thoroughly exempt the passive situation that transformer is burnt because of overload, achieve a kind of anti-automatically defencive function that burns of addition in low-voltage power supply system.
The utility model is the automatic protection setting of adopting according to the true temperature of transformer self-heating, is that performance is very stable accurately and effectively with giving the anti-automatic safety device that burns of low pressure oil-immersed distributing transformer.
Advantage of the present utility model just is: only need the said equipment device at certain position and connect can realize the anti-automatic protection functions that burns of transformer in corresponding circuit; have with low costly, device connects simple, and thermometric is accurate and visual; use characteristics such as reliable and secure, saving guard.
Description of drawings:
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a circuit theory connection diagram of the present utility model.
(1), infrared temperature probe among Fig. 1, (2), transformer, (3), automatic temperature control device power line, (4) automatic temperature control device, (5), alarm, (6), signal lamp, (7), automatic control switch, (8). (9), switch terminal, (10) phase-detecting amplitude-detecting leak relay, (11). (12), phase-detecting amplitude-detecting leak relay line bag terminals, (13). (14), A.C. contactor line bag terminals, (15), A.C. contactor.
Embodiment:
In Fig. 1; infrared temperature probe (1) is aimed at the higher position of transformer (2) temperature rise; and be connected with automatic temperature control device (4) with lead; automatic control switch (7) stretches to two terminals (8) of outside; (9) be connected with A.C. contactor line bag terminals (14) with phase-detecting amplitude-detecting leak relay line bag terminals (12) respectively; phase-detecting amplitude-detecting leak relay line bag terminals (11) are connected with A.C. contactor line bag terminals (13); so with its whole energized; all protective devices will enter full-automatic protection running status; when circuit makes the inner heating in winding of transformer (2) rise near critical temperature because of excess load or phase fault overcurrent; the infrared temperature probe (1) of aiming at transformer (2) sends temperature signal to automatic temperature control device (4); automatic temperature control device will excite alarm (5) and signal lamp (6) to be warned simultaneously; the prompting operator on duty in time adjusts supply load, to guarantee the normal operation of transformer.Under unattended situation; the transformer internal temperature will continue to raise; automatic temperature control device when rising to critical temperature (4) will start driving command; make the closed circuit between automatic control switch (7) disconnection phase-detecting amplitude-detecting leak relay and the A.C. contactor line bag; force A.C. contactor (15) tripping operation and the load of cutoff low side; make transformer (2) be in Light Condition; this moment is non-loaded because of transformer; inner winding temperature will descend gradually; when being brought down below critical temperature value; automatic temperature control device will excite driving command; drive the circuit between automatic control switch (7) connection phase demodulation amplitude discrimination leakance electrical relay and the A.C. contactor line bag; make the A.C. contactor adhesive, transformer (2) recovers normal powered operation state, realizes its anti-effective efficiency of protection automatically that burns.
Claims (2)
1. a low voltage distribution transformer prevents burning automatic safety device; it comprises transformer (2); infrared temperature probe (1); A.C. contactor (15); automatic temperature control device (4); alarm (5); signal lamp (6); automatic control switch (7); the phase-detecting amplitude-detecting leak device (10) that continues, A.C. contactor devices such as (15) connect with lead and combine, and it is characterized in that: have infrared temperature probe (1) relative at the higher position of transformer (2) temperature rise; and be connected with automatic temperature control device (4) with lead, with automatic control switch (7); the line bag of phase-detecting amplitude-detecting leak relay and the line bag of A.C. contactor are serially connected in it in closed circuit with lead.
2. the anti-automatic safety device that burns of low voltage distribution transformer according to claim 1 is characterized in that: be set with critical temperature value on automatic temperature control device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201465778U CN201430417Y (en) | 2009-04-23 | 2009-04-23 | Automatic anti-burnout protection device of low-voltage distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201465778U CN201430417Y (en) | 2009-04-23 | 2009-04-23 | Automatic anti-burnout protection device of low-voltage distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201430417Y true CN201430417Y (en) | 2010-03-24 |
Family
ID=42034157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201465778U Expired - Fee Related CN201430417Y (en) | 2009-04-23 | 2009-04-23 | Automatic anti-burnout protection device of low-voltage distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201430417Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413648A (en) * | 2013-07-05 | 2013-11-27 | 安徽海宇电气有限公司 | Automatic outage device of transformer |
| CN105004956A (en) * | 2015-07-30 | 2015-10-28 | 天地（常州）自动化股份有限公司 | Collector control and temperature rise test device |
-
2009
- 2009-04-23 CN CN2009201465778U patent/CN201430417Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413648A (en) * | 2013-07-05 | 2013-11-27 | 安徽海宇电气有限公司 | Automatic outage device of transformer |
| CN105004956A (en) * | 2015-07-30 | 2015-10-28 | 天地（常州）自动化股份有限公司 | Collector control and temperature rise test device |
| CN105004956B (en) * | 2015-07-30 | 2018-03-30 | 天地（常州）自动化股份有限公司 | A kind of current-collector control and temperature rise test equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20110423 |