简介：　　做为制造业领先指标（通常是三个月）的保留进口,the retained import figure does give a relatively good indication of the direction of the manufacturing and electronic activities and as such the Singapore economy. The indicator that reflects the domestic demand is the non-oil imports. It fell 19.3% in July,turning points in the economy are signalled by three consecutive months of LEI changes in the same direction. This leading indicator is like a lighthouse

简介：　　做为制造业领先指标（通常是三个月）的保留进口,is still down. It fell15.6% for 1998. This spells weak manufacturing and electronics figures in the following two quarters. July’s total trade figures fell 9.1%,turning points in the economy are signalled by three consecutive months of LEI changes in the same direction. This leading indicator is like a lighthouse

简介：当审计师无法确证公司的财务报表具有公正表达性时,the auditor certifies that the audited financial statements are prepared in accordance with of the Generally Accepted Accounting Principles (GAAP) and are able to fairly presentthe company's financial position at the end of the financial year and its performance as well as the changes in financial positions for the financialyear. An unqualified audit report is also known as a "clean" report.　The BS is the statement that presents the company's financial position at the year-end. The company's performance and changes in financial positions for the year are respectively presented by the IS and the SCFP.　For a financial year,公司在财务年度里的经营成果和财务状况变动的情况则分别由损益表及财务状况变动表来表达

简介：当审计师无法确证公司的财务报表具有公正表达性时,the auditor certifies that the audited financial statements are prepared in accordance with of the Generally Accepted Accounting Principles (GAAP) and are able to fairly presentthe company's financial position at the end of the financial year and its performance as well as the changes in financial positions for the financialyear. An unqualified audit report is also known as a "clean" report.　The BS is the statement that presents the company's financial position at the year-end. The company's performance and changes in financial positions for the year are respectively presented by the IS and the SCFP.　For a financial year,公司在财务年度里的经营成果和财务状况变动的情况则分别由损益表及财务状况变动表来表达

简介：traditional current differential protection cannot identify such fault for the sake of sensitivity limited by normal load current. RCS-985 Series generator-transformer unit protection is equipped with transformer DPFC percentage restraint differential protection and generator DPFC percentage restraint differential protection. Comparing with traditional percentage restraint differential protection,DPFC percentage restraint differential protection makes use of DPFC in phase current on each side of transformer and DPFC in differential current,Inter-turn fault is the main kind of fault in electric power transformer. It is meaningful that employing sensitive and secure protection to identify inter-turn fault inside power transformer. In RCS-978 series power transformer protection

简介：traditional current differential protection cannot identify such fault for the sake of sensitivity limited by normal load current. RCS-985 Series generator-transformer unit protection is equipped with transformer DPFC percentage restraint differential protection and generator DPFC percentage restraint differential protection. Comparing with traditional percentage restraint differential protection,DPFC percentage restraint differential protection makes use of DPFC in phase current on each side of transformer and DPFC in differential current,Inter-turn fault is the main kind of fault in electric power transformer. It is meaningful that employing sensitive and secure protection to identify inter-turn fault inside power transformer. In RCS-978 series power transformer protection

简介：thus the sensitivity is high for internal low percentage inter-turn fault without risks of unwanted operation under external fault.,Integration of main and backup protection with duplicate allocation reduces the total number of power transformer protection devices,Lifting differential setting or introducing differential protection with product- quantity restraint will lose sensitivity or even lead to missing operation. With identifying harmonic component and waveform character of differential current asynchronous anti-TA saturation criterion can distinguish between internal fault and TA saturation under external fault.

简介：Split-phase current differential protection has excellent capability of fault phase selection no matter whether the fault occurs on the same line or cross over lines.,under-reaching distance protection will not overreach when fault occurs at the end of line or the beginning of the next line after series capacitor.,The whole protection scheme for double-circuit lines on the same tower consists of split-phase current differential protection or split-phase composite distance carrier protection and zero-sequence directional comparison protection as main protection

简介：Shen Guorong. RESEARCH ON PRINCIPLE OF DPFC DIRECTIONAL RELAY. AUTOMATION OF ELECTRIC POWER SYSTEMS.1983,Shen Guorong. RCS-978 DIGITAL TRANSFORMER PROTECTION SET. AUTOMATION OF ELECTRIC POWER SYSTEMS.2000,Zheng Yuping. LFP-915 DIGITAL BUSBAR PROTECTION SET. AUTOMATION OF ELECTRIC POWER SYSTEMS.2000

简介：DPFC percentage restraint differential protection makes use of DPFC in phase current on each side of transformer and DPFC in differential current,Fault on and near busbar is the most serious fault for electric power system transient state stability. Clearing such kind of fault quickly is key to keep system stability. As to line protection,Inter-turn fault is the main kind of fault in electric power transformer. It is meaningful that employing sensitive and secure protection to identify inter-turn fault inside power transformer. In RCS-978 series power transformer protection