CN203587791U

CN203587791U - Intelligent grounding device simulation system

Info

Publication number: CN203587791U
Application number: CN201320652297.0U
Authority: CN
Inventors: 马俊超; 姜仲秋; 王惠君; 全学明
Original assignee: HUAIAN SUDA ELECTRICAL Co Ltd
Current assignee: HUAIAN SUDA ELECTRICAL Co Ltd
Priority date: 2013-10-22
Filing date: 2013-10-22
Publication date: 2014-05-07
Anticipated expiration: 2023-10-22

Abstract

The utility model discloses an intelligent grounding device simulation system. The electrical loop of the simulation system comprises a control circuit and a load circuit. The control circuit, the load circuit and an over-protection circuit are mutually connected together according to the configuration of electrical loop. The intelligent grounding device simulation system can be used for testing the characteristic parameters of grounding devices, and verifying and calibrating grounding impedance testers and grounding resistance testers in the fields of the power system, the weather system, mines and other enterprises, and the metrological service. By means of the simulation system, the verifying and calibrating accuracy is improved, and the running safety of electrical equipment is also ensured.

Description

Smart grounding unit simulation system

Technical field

The utility model relates to earthing device simulation system, relates to calibrating and the calibration of earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester in electric system, meteorological system, large-scale industrial enterprise.

Background technology

Earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester in electric system, meteorological system, large-scale industrial enterprise, by periodic verification and calibration, can find hidden danger in time, guarantees the safe operation of electrical network.At present, the method that the calibrating of earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester and calibration adopt measuring resistance to check, its shortcoming be cannot analogue ground device virtual condition, the size of antijamming capability and the rated power of tested instrument cannot be examined and determine, the requirement of large electric current calibrating cannot be realized.

Summary of the invention

The purpose of this utility model is: a kind of smart grounding unit simulation system is provided, calibrating and calibration as electric system, meteorological system, industrial enterprise and metrological service's earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester, improve calibrating and calibration accuracy, ensure electric equipment operation safety.

Technical solution of the present utility model is: the electric loop of this simulation system comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK ₁1 end connect fuse B ₁2 ends, power switch ZK ₁2 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, pilot lamp XD is in parallel with power supply relay JD; 3 ends of power supply relay JD connect fuse B ₁2 ends, 4 ends of power supply relay JD connect 2 ends of voltage relay YJ, 4 ends of voltage relay YJ are linked zero line N; Current protective relay LJ ₁normal opened contact 1 end connect 2 ends of voltage relay YJ, current protective relay LJ ₁3 end tie-time of normal opened contact relay SJ ₁7 ends, time relay sj ₁8 ends connect zero line N; Time relay sj ₁normal opened contact 3 ends connect current protective relay LJ ₁normal opened contact 1 end, time relay sj ₁normal opened contact 5 ends connect 1 end of intermediate relay ZJ, 2 ends of intermediate relay ZJ connect zero line N; The 1 end tie-time relay SJ of temperature relay WK ₁normal opened contact 3 ends, 2 ends of temperature relay WK connect zero line N; 1 end of time relay S connects 1 end of temperature relay WK, and 2 ends of time relay S connect 2 ends of temperature relay WK; Fan switch ZK ₂1 end of 1 end tie-time relay S, 1 end of the 2 end connecting fan FS of time relay S, 2 ends of blower fan FS connect zero line N; Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK ₂1 end, 5 ends of intermediate relay ZJ connect short-current protective relay LJ ₂1 end, short-current protective relay LJ ₂3 ends connect 4 ends of temperature relay WK, 7 ends of the 3 end tie-time relay S of temperature relay WK, 8 ends of time relay S connect 1 end of voltage relay YJ, 3 ends of voltage relay YJ connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₁2 ends connect impedance transformation relay K M ₄3 ends, impedance transformation relay K M ₄4 ends connect impedance transformation relay K M ₃3 ends, impedance transformation relay K M ₃4 ends connect impedance transformation relay K M ₂7 ends, impedance transformation relay K M ₂8 ends connect impedance transformation relay K M ₁1 end, impedance transformation relay K M ₁2 ends connect zero line N, pilot lamp XD1 and impedance transformation relay K M ₁in parallel; Impedance change-over switch AN ₂1 end connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₂2 ends connect impedance transformation relay K M ₄5 ends, impedance transformation relay K M ₄6 ends connect impedance transformation relay K M ₃5 ends, impedance transformation relay K M ₃6 ends connect impedance transformation relay K M ₁7 ends, impedance transformation relay K M ₁8 ends connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₂2 ends connect zero line N, pilot lamp XD2 and impedance transformation relay K M ₂in parallel; Impedance change-over switch AN ₃1 end connect impedance change-over switch AN ₂1 end, impedance change-over switch AN ₃2 ends connect impedance transformation relay K M ₄7 ends, impedance transformation relay K M ₄8 ends connect impedance transformation relay K M ₂9 ends, impedance transformation relay K M ₂10 ends connect impedance transformation relay K M ₁9 ends, impedance transformation relay K M ₁10 ends connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₃2 ends connect zero line N, pilot lamp XD ₃with impedance transformation relay K M ₃in parallel; Impedance change-over switch AN ₄1 end connect impedance change-over switch AN ₃1 end, impedance change-over switch AN ₄2 ends connect impedance transformation relay K M ₃7 ends, impedance transformation relay K M ₃8 ends connect impedance transformation relay K M ₂11 ends, impedance transformation relay K M ₂12 ends connect impedance transformation relay K M ₁11 ends, impedance transformation relay K M ₁12 ends connect impedance transformation relay K M ₄1 end, impedance transformation relay K M ₄2 ends connect zero line N, pilot lamp XD4 and impedance transformation relay K M ₄in parallel; Its load circuit is connected as follows by electronic devices and components: LH is punching current transformer, and reometer 1 end connects 1 end of current transformer LH secondary side, reometer 2 ends connection current transformer LH secondary sides 2 ends; Current protective relay LJ ₁2 ends connect L ₁, current protective relay LJ ₁4 ends connect short-current protective relay LJ ₂2 ends, short-current protective relay LJ ₂4 ends connect loaded impedance Z ₁1 end, loaded impedance Z ₁2 ends connect loaded impedance Z ₂1 end, loaded impedance Z ₂2 ends connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N ₁, impedance transformation relay K M ₁5 ends connect impedance transformation relay K M ₂5 ends, impedance transformation relay K M ₁6 ends connect impedance transformation relay K M ₂6 ends; Impedance transformation relay K M ₃1 end connect short-current protective relay LJ ₂4 ends, impedance transformation relay K M ₃2 ends connect impedance transformation relay K M ₄2 ends, impedance transformation relay K M ₄1 end connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N _1,impedance transformation relay K M ₂1 end connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₂2 ends connect impedance transformation relay K M ₃2 ends, impedance transformation relay K M ₂2 ends connect again loaded impedance Z ₃1 end, loaded impedance Z ₃2 ends connect loaded impedance Z ₄1 end, loaded impedance Z ₄2 ends connect impedance transformation relay K M ₁6 ends; Impedance transformation relay K M ₁1 end connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₁2 ends connect loaded impedance Z ₃2 ends.

The beneficial effects of the utility model are: for electric system, meteorological system, in large-scale industrial enterprise, examining and determine earthing device characterisitic parameter test macro, earth loop impedance test instrument, earth resistance tester, a kind of Special grounding unit simulation system is provided, overcome electric system, meteorological system, earthing device characterisitic parameter test macro in large-scale industrial enterprise, earth loop impedance test instrument, what in earth resistance tester periodic verification and calibration process, exist cannot analogue ground device actual condition, cannot examine and determine the interference free performance of tested instrument, cannot reach the shortcomings such as large electric current calibrating requirement, fill up the blank of this domain-specific earthing device simulation system.

Accompanying drawing explanation

Fig. 1 is smart grounding unit simulation circuit system schematic diagram.

In figure: ZK ₁power switch, ZK ₂be fan switch, JD is power supply relay, and YJ is voltage relay, SJ ₁be the time relay, WK is temperature relay, and FS is cooling fan, KM ₁～KM ₄for impedance transformation relay, Z ₁～Z ₄for loaded impedance, LJ ₁current protective relay, LJ ₂short-current protective relay, B ₁fuse, XD and XD ₁～XD ₅be pilot lamp, LH is current transformer, and A is reometer, AN ₁～AN ₄it is impedance change-over switch.

Embodiment

As shown in Figure 1, the electric loop of this simulation system comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK ₁1 end connect fuse B ₁2 ends, power switch ZK ₁2 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, pilot lamp XD is in parallel with power supply relay JD; 3 ends of power supply relay JD connect fuse B ₁2 ends, 4 ends of power supply relay JD connect 2 ends of voltage relay YJ, 4 ends of voltage relay YJ are linked zero line N; Current protective relay LJ ₁normal opened contact 1 end connect 2 ends of voltage relay YJ, current protective relay LJ ₁3 end tie-time of normal opened contact relay SJ ₁7 ends, time relay sj ₁8 ends connect zero line N; Time relay sj ₁normal opened contact 3 ends connect current protective relay LJ ₁normal opened contact 1 end, time relay sj ₁normal opened contact 5 ends connect 1 end of intermediate relay ZJ, 2 ends of intermediate relay ZJ connect zero line N; The 1 end tie-time relay SJ of temperature relay WK ₁normal opened contact 3 ends, 2 ends of temperature relay WK connect zero line N; 1 end of time relay S connects 1 end of temperature relay WK, and 2 ends of time relay S connect 2 ends of temperature relay WK; Fan switch ZK ₂1 end of 1 end tie-time relay S, 1 end of the 2 end connecting fan FS of time relay S, 2 ends of blower fan FS connect zero line N; Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK ₂1 end, 5 ends of intermediate relay ZJ connect short-current protective relay LJ ₂1 end, short-current protective relay LJ ₂3 ends connect 4 ends of temperature relay WK, 7 ends of the 3 end tie-time relay S of temperature relay WK, 8 ends of time relay S connect 1 end of voltage relay YJ, 3 ends of voltage relay YJ connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₁2 ends connect impedance transformation relay K M ₄3 ends, impedance transformation relay K M ₄4 ends connect impedance transformation relay K M ₃3 ends, impedance transformation relay K M ₃4 ends connect impedance transformation relay K M ₂7 ends, impedance transformation relay K M ₂8 ends connect impedance transformation relay K M ₁1 end, impedance transformation relay K M ₁2 ends connect zero line N, pilot lamp XD1 and impedance transformation relay K M ₁in parallel; Impedance change-over switch AN ₂1 end connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₂2 ends connect impedance transformation relay K M ₄5 ends, impedance transformation relay K M ₄6 ends connect impedance transformation relay K M ₃5 ends, impedance transformation relay K M ₃6 ends connect impedance transformation relay K M ₁7 ends, impedance transformation relay K M ₁8 ends connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₂2 ends connect zero line N, pilot lamp XD2 and impedance transformation relay K M ₂in parallel; Impedance change-over switch AN ₃1 end connect impedance change-over switch AN ₂1 end, impedance change-over switch AN ₃2 ends connect impedance transformation relay K M ₄7 ends, impedance transformation relay K M ₄8 ends connect impedance transformation relay K M ₂9 ends, impedance transformation relay K M ₂10 ends connect impedance transformation relay K M ₁9 ends, impedance transformation relay K M ₁10 ends connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₃2 ends connect zero line N, pilot lamp XD ₃with impedance transformation relay K M ₃in parallel; Impedance change-over switch AN ₄1 end connect impedance change-over switch AN ₃1 end, impedance change-over switch AN ₄2 ends connect impedance transformation relay K M ₃7 ends, impedance transformation relay K M ₃8 ends connect impedance transformation relay K M ₂11 ends, impedance transformation relay K M ₂12 ends connect impedance transformation relay K M ₁11 ends, impedance transformation relay K M ₁12 ends connect impedance transformation relay K M ₄1 end, impedance transformation relay K M ₄2 ends connect zero line N, pilot lamp XD4 and impedance transformation relay K M ₄in parallel; Its load circuit is connected as follows by electronic devices and components: LH is punching current transformer, and reometer 1 end connects 1 end of current transformer LH secondary side, reometer 2 ends connection current transformer LH secondary sides 2 ends; Current protective relay LJ ₁2 ends connect L ₁, current protective relay LJ ₁4 ends connect short-current protective relay LJ ₂2 ends, short-current protective relay LJ ₂4 ends connect loaded impedance Z ₁1 end, loaded impedance Z ₁2 ends connect loaded impedance Z ₂1 end, loaded impedance Z ₂2 ends connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N ₁, impedance transformation relay K M ₁5 ends connect impedance transformation relay K M ₂5 ends, impedance transformation relay K M ₁6 ends connect impedance transformation relay K M ₂6 ends; Impedance transformation relay K M ₃1 end connect short-current protective relay LJ ₂4 ends, impedance transformation relay K M ₃2 ends connect impedance transformation relay K M ₄2 ends, impedance transformation relay K M ₄1 end connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N _1,impedance transformation relay K M ₂1 end connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₂2 ends connect impedance transformation relay K M ₃2 ends, impedance transformation relay K M ₂2 ends connect again loaded impedance Z ₃1 end, loaded impedance Z ₃2 ends connect loaded impedance Z ₄1 end, loaded impedance Z ₄2 ends connect impedance transformation relay K M ₁6 ends; Impedance transformation relay K M ₁1 end connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₁2 ends connect loaded impedance Z ₃2 ends.

The principle of work of above-mentioned simulation system is as follows: when system is started working, the fan switch that must manually close, starts cooling blower FS, to system, carries out cooling; Overvoltage protection consists of over voltage relay YJ, and overvoltage value is adjusted arbitrarily within the scope of 242V～264V, when loop voltage surpasses setting valve, and overvoltage protection voltage relay YJ action, voltage relay YJ normally closed contact disconnects, and cuts off work loop; Short-circuit protection is by short-current protective relay LJ ₂form, when load circuit is short-circuited, short-current protective relay LJ ₂action, short-current protective relay LJ ₂normally closed contact disconnects, and cuts off work loop, short-current protective relay LJ ₂the setting range of short-circuit protection is adjusted arbitrarily in 50A～100A; Overcurrent protection is by current protective relay LJ ₁and time relay sj ₁form, when load circuit excess current, current protective relay LJ ₁action, current protective relay LJ ₁normal opened contact is closed, start-up time relay SJ ₁, time relay sj ₁normal opened contact is closed after time delay, starts intermediate relay ZJ, and after intermediate relay ZJ action, intermediate relay ZJ normally closed contact disconnects, and cuts off work loop, and the definite value of overcurrent protection is adjusted arbitrarily in 5A～30A, time relay sj ₁time setting scope is 1 second～10 seconds, ZJ model DZ15; Overheating protection consists of temperature relay WK, and when system occurs when overheated, temperature relay WK normally closed contact disconnects, and cuts off work loop, and the definite value of overheating protection is adjusted arbitrarily within the scope of 90 ℃～120 ℃; Timing control loop consists of time relay S, the time of time relay sj adjusted arbitrarily in 60 minutes at 1 minute, when System production time overtime setting valve, and time relay sj action, time relay sj normally closed contact disconnects, and cuts off work loop; According to the needs of testing, select the size of loaded impedance, by impedance change-over switch AN ₁～AN ₄the switching of button, realizes the switching of impedance; In impedance load loop, Z ₁=Z ₂=Z ₃=Z ₄=30, impedance switch operating principle is as follows: the impedance change-over switch of closing AN ₁switch, impedance transformation relay K M ₁action, Z ₂and Z ₄parallel connection, its equiva lent impedance is 15; The impedance change-over switch of closing AN ₂switch, impedance transformation relay K M ₂action, its equiva lent impedance is (Z ₁+ Z ₂) // (Z ₃+ Z ₄)=(30+30) // (30+30)=30; The impedance change-over switch of closing AN ₃switch, impedance transformation relay K M ₃action, its equiva lent impedance is (Z ₃+ Z ₄)=30+30=60; The impedance change-over switch of closing AN ₄switch, impedance transformation relay K M ₄action, its equiva lent impedance is (Z ₁+ Z ₂+ Z ₃+ Z ₄)=30+30+30+30=120.

Claims

1. smart grounding unit simulation system, is characterized in that: the electric loop of this simulation system comprises control circuit and load circuit, and its control circuit connects as follows by electronic devices and components: power switch ZK ₁1 end connect fuse B ₁2 ends, power switch ZK ₁2 ends connect 1 end of power supply relay JD, 2 ends of power supply relay JD connect zero line N, pilot lamp XD is in parallel with power supply relay JD; 3 ends of power supply relay JD connect fuse B ₁2 ends, 4 ends of power supply relay JD connect 2 ends of voltage relay YJ, 4 ends of voltage relay YJ are linked zero line N; Current protective relay LJ ₁normal opened contact 1 end connect 2 ends of voltage relay YJ, current protective relay LJ ₁3 end tie-time of normal opened contact relay SJ ₁7 ends, time relay sj ₁8 ends connect zero line N; Time relay sj ₁normal opened contact 3 ends connect current protective relay LJ ₁normal opened contact 1 end, time relay sj ₁normal opened contact 5 ends connect 1 end of intermediate relay ZJ, 2 ends of intermediate relay ZJ connect zero line N; The 1 end tie-time relay SJ of temperature relay WK ₁normal opened contact 3 ends, 2 ends of temperature relay WK connect zero line N; 1 end of time relay S connects 1 end of temperature relay WK, and 2 ends of time relay S connect 2 ends of temperature relay WK; Fan switch ZK ₂1 end of 1 end tie-time relay S, 1 end of the 2 end connecting fan FS of time relay S, 2 ends of blower fan FS connect zero line N; Intermediate relay ZJ normally closed contact 3 end connecting fan switch ZK ₂1 end, 5 ends of intermediate relay ZJ connect short-current protective relay LJ ₂1 end, short-current protective relay LJ ₂3 ends connect 4 ends of temperature relay WK, 7 ends of the 3 end tie-time relay S of temperature relay WK, 8 ends of time relay S connect 1 end of voltage relay YJ, 3 ends of voltage relay YJ connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₁2 ends connect impedance transformation relay K M ₄3 ends, impedance transformation relay K M ₄4 ends connect impedance transformation relay K M ₃3 ends, impedance transformation relay K M ₃4 ends connect impedance transformation relay K M ₂7 ends, impedance transformation relay K M ₂8 ends connect impedance transformation relay K M ₁1 end, impedance transformation relay K M ₁2 ends connect zero line N, pilot lamp XD1 and impedance transformation relay K M ₁in parallel; Impedance change-over switch AN ₂1 end connect impedance change-over switch AN ₁1 end, impedance change-over switch AN ₂2 ends connect impedance transformation relay K M ₄5 ends, impedance transformation relay K M ₄6 ends connect impedance transformation relay K M ₃5 ends, impedance transformation relay K M ₃6 ends connect impedance transformation relay K M ₁7 ends, impedance transformation relay K M ₁8 ends connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₂2 ends connect zero line N, pilot lamp XD2 and impedance transformation relay K M ₂in parallel; Impedance change-over switch AN ₃1 end connect impedance change-over switch AN ₂1 end, impedance change-over switch AN ₃2 ends connect impedance transformation relay K M ₄7 ends, impedance transformation relay K M ₄8 ends connect impedance transformation relay K M ₂9 ends, impedance transformation relay K M ₂10 ends connect impedance transformation relay K M ₁9 ends, impedance transformation relay K M ₁10 ends connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₃2 ends connect zero line N, pilot lamp XD ₃with impedance transformation relay K M ₃in parallel; Impedance change-over switch AN ₄1 end connect impedance change-over switch AN ₃1 end, impedance change-over switch AN ₄2 ends connect impedance transformation relay K M ₃7 ends, impedance transformation relay K M ₃8 ends connect impedance transformation relay K M ₂11 ends, impedance transformation relay K M ₂12 ends connect impedance transformation relay K M ₁11 ends, impedance transformation relay K M ₁12 ends connect impedance transformation relay K M ₄1 end, impedance transformation relay K M ₄2 ends connect zero line N, pilot lamp XD4 and impedance transformation relay K M ₄in parallel; Its load circuit is connected as follows by electronic devices and components: LH is punching current transformer, and reometer 1 end connects 1 end of current transformer LH secondary side, reometer 2 ends connection current transformer LH secondary sides 2 ends; Current protective relay LJ ₁2 ends connect L ₁, current protective relay LJ ₁4 ends connect short-current protective relay LJ ₂2 ends, short-current protective relay LJ ₂4 ends connect loaded impedance Z ₁1 end, loaded impedance Z ₁2 ends connect loaded impedance Z ₂1 end, loaded impedance Z ₂2 ends connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N ₁, impedance transformation relay K M ₁5 ends connect impedance transformation relay K M ₂5 ends, impedance transformation relay K M ₁6 ends connect impedance transformation relay K M ₂6 ends; Impedance transformation relay K M ₃1 end connect short-current protective relay LJ ₂4 ends, impedance transformation relay K M ₃2 ends connect impedance transformation relay K M ₄2 ends, impedance transformation relay K M ₄1 end connect impedance transformation relay K M ₁5 ends, impedance transformation relay K M ₁6 ends connect zero line N _1,impedance transformation relay K M ₂1 end connect impedance transformation relay K M ₃1 end, impedance transformation relay K M ₂2 ends connect impedance transformation relay K M ₃2 ends, impedance transformation relay K M ₂2 ends connect again loaded impedance Z ₃1 end, loaded impedance Z ₃2 ends connect loaded impedance Z ₄1 end, loaded impedance Z ₄2 ends connect impedance transformation relay K M ₁6 ends; Impedance transformation relay K M ₁1 end connect impedance transformation relay K M ₂1 end, impedance transformation relay K M ₁2 ends connect loaded impedance Z ₃2 ends.