CA1038949A - Motor protection apparatus and method - Google Patents
Motor protection apparatus and methodInfo
- Publication number
- CA1038949A CA1038949A CA220,452A CA220452A CA1038949A CA 1038949 A CA1038949 A CA 1038949A CA 220452 A CA220452 A CA 220452A CA 1038949 A CA1038949 A CA 1038949A
- Authority
- CA
- Canada
- Prior art keywords
- pilot signal
- operating
- switch
- switch means
- compressor
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- 230000007423 decrease Effects 0.000 claims abstract description 15
- 230000002633 protecting effect Effects 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241000347881 Kadua laxiflora Species 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
- H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Protection Of Generators And Motors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48329374 US3898527A (en) | 1974-06-26 | 1974-06-26 | Motor protection apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1038949A true CA1038949A (en) | 1978-09-19 |
Family
ID=23919502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA220,452A Expired CA1038949A (en) | 1974-06-26 | 1975-02-19 | Motor protection apparatus and method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3898527A (enExample) |
| JP (1) | JPS513407A (enExample) |
| CA (1) | CA1038949A (enExample) |
| DE (1) | DE2509012A1 (enExample) |
| FR (1) | FR2276716A1 (enExample) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995199A (en) * | 1975-08-25 | 1976-11-30 | Lennox Industries Inc. | Compressor motor protection |
| US4318673A (en) * | 1977-07-25 | 1982-03-09 | Hi-Stat Manufacturing Company, Inc. | Pressure switch and circuit means |
| DE2910966A1 (de) * | 1979-03-21 | 1980-10-02 | Bosch Gmbh Robert | Kaelteverdichter |
| US4357807A (en) * | 1981-01-09 | 1982-11-09 | Jerry Aleksandrow | Low energy ice making apparatus |
| US5200872A (en) * | 1989-12-08 | 1993-04-06 | Texas Instruments Incorporated | Internal protection circuit for electrically driven device |
| US6301091B1 (en) * | 1999-04-27 | 2001-10-09 | Rockwell Automation Technologies, Inc. | Relay configuration |
| DE19948552A1 (de) * | 1999-10-08 | 2001-06-07 | Siemens Ag | Aktoreinheit mit einem Grundaktor, einem Zusatzaktor und einer sicheren Ansteuereinheit |
| JP4298199B2 (ja) | 1999-10-08 | 2009-07-15 | シーメンス アクチエンゲゼルシヤフト | 少なくとも２つの接触器と１つの安全な駆動ユニットを有するアクチュエータユニット |
| DE10041633A1 (de) * | 2000-08-24 | 2002-03-07 | Moeller Gmbh | Schaltgeräteanordnung |
| NO20025207A (no) * | 2002-10-30 | 2003-12-01 | Sleipner Motor As | Fremgangsmåte og styresystem for styring av elektromotorer |
| US7861545B2 (en) * | 2006-06-14 | 2011-01-04 | Cnh America Llc | Air conditioning cut-out circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2470257A (en) * | 1945-11-23 | 1949-05-17 | Milton K Moore | Electrical protective system |
| US2635200A (en) * | 1946-09-03 | 1953-04-14 | Gen Motors Corp | Control mechanism |
| US3358468A (en) * | 1965-08-03 | 1967-12-19 | Carrier Corp | Control apparatus for refrigeration compressor |
| US3443394A (en) * | 1967-08-23 | 1969-05-13 | Capitol Temptrol Corp | Water chiller with improved freeze-up protection |
| US3656023A (en) * | 1970-09-21 | 1972-04-11 | Joseph M Hadfield | Protective circuit |
| US3688157A (en) * | 1970-12-28 | 1972-08-29 | Joseph F Spears | Motor protection control apparatus |
-
1974
- 1974-06-26 US US48329374 patent/US3898527A/en not_active Expired - Lifetime
-
1975
- 1975-02-19 CA CA220,452A patent/CA1038949A/en not_active Expired
- 1975-03-01 DE DE19752509012 patent/DE2509012A1/de active Pending
- 1975-03-10 JP JP2892975A patent/JPS513407A/ja active Pending
- 1975-03-21 FR FR7509011A patent/FR2276716A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2276716B3 (enExample) | 1977-11-25 |
| US3898527A (en) | 1975-08-05 |
| DE2509012A1 (de) | 1976-01-15 |
| FR2276716A1 (fr) | 1976-01-23 |
| JPS513407A (enExample) | 1976-01-12 |
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