在大于一万千瓦的熔炼系统中,新研采用並聯諧振电源。在超大功率电源中,並聯諧振电源与串联谐振电源相比具有更高的安全性,新研独特的並聯諧振设计确保了当功率大于40%时整流满开放,功率因数最高,高次谐波较小,与传统并联电源相比,具有巨大优势。
新研獨特的設計確保了100%的啓動成功率。在大功率的情況下仍然能確保線圈設計電壓在一個合理的範圍內,保證了設備的安全性。大功率的並聯電源可以構成一對一的熔煉系統,也可以通過外部新研大容量的氣動切換開關對爐體進行選擇,可以方便的實現一對二切換式熔煉系統或者二對三切換式熔煉系統,以滿足各種不同的應用需要。
電源櫃12脈沖及24脈沖的多脈沖設計進一步降低了高次諧波,獨特的整流觸發板設計確保各相進線之間電流平衡,同時實行軟啓動防止電源沖擊,並在故障發生時快速切斷電源。
数字化的信号传输全部通过光纤实现,抗干扰能力强,系统更加稳定。並聯諧振中频电源所有器件都安装在封闭的柜子内。电源柜内铜排和铜管使用国内知名品牌,铜排经喷沙,钝化,制作规范。电源柜元器件布置合理,易于维修,走线,布线规范。维修人员能很轻易地接触到所有的维修点。
電源櫃同時配有熔煉管理器。PLC和人機界面組成具有的一個方便操作的熔煉管理器,功能包括:自動烘爐,冷爐啓動,故障診斷,故障信息顯示和存儲,運行信息顯示,系統狀態顯示等。在前門上部布置一個密閉的隔離控制室,裝有主控板、反饋板、控制電源等控制部件,可以方便地觀測主控板的信號。隔離控制室不需額外的冷卻。電源櫃主要電力電子器件是水冷的,櫃內在運行過程中的溫升不會影響隔離控制室。同時隔離控制室內所有的電子控制電路板上所有電子元件的選型是按高溫度等級來進行的。
配備全功能的進線空氣開關保護系統。快速動作的全功能斷路器(空氣開關)安裝于電源的正面,它由電動操作機構操作,有一個24V的失壓線圈起聯鎖保護作用,並帶有過電流保護,發生過電流時,它跳閘保護動作,切斷進線電源對電源櫃的供電。橋式整流部分把交流電轉換成直流電,爲逆變部分提供一個穩定的直流平台。電容安裝于全封閉的電容櫃內,由高強度的冷軋鋼板制成的。同時配備有差動電流方式和直流注入式漏爐測試報警電路,指示燈、漏電流表及檢測控制電路等組成。在正常工作時,它連續檢測。
當發生下列情況時,關斷電源:
1. 金属渗透炉衬到感应线圈;
2. 炉衬内有过多的潮气;
3. 个别电器组件对地低电阻。
由于線圈爲無氧銅管整體饒制,因此差動電流方式和直流注入式漏爐報警電路保護整個線圈,包括有效線圈和水冷線圈。差動電流方式是電子式的保護,速度快,當輸出回路發生對地閃絡故障時,差動電流保護就能以最快速度進行響應。直流注入式漏爐報警爲非電子式保護,速度相對較慢,但當電源櫃停止運行時,它也能對漏爐進行檢測。
"Excuse me," Arthur ventured, huskily, "did you wish to speak to me?" "What!" Balmayne cried, "were you mad enough to----." seventeen Christmas presents? I'm a Socialist, please remember; And to close the procession came more soldiers. For that fog the seaplane was making at full speed. It was no wonder that Spain, feeling the serious effects of this state of things, should resist it; and when she did so, and exerted an unusual degree of vigilance, then the most terrible outcries were raised, and wonderful stories were circulated of Spanish cruelties to our people beyond the Atlantic. At this time the Opposition got hold of one of these, and made the House of Commons and the nation resound with it. It was, that one Captain Robert Jenkins, who had been master of a sloop trading from Jamaica, had been boarded and searched by a Coastguard, and treated in a most barbarous manner, though they could detect no proof of smuggling in his vessel. He said that the Spanish captain had cut off one of his ears, bidding him carry it to his king, and tell his Majesty that if he were present he would treat him in the same manner. This story was now seven years old, but it was not the less warmly received on that account. It excited the utmost horror, and Jenkins was ordered to appear at the bar of the House of Commons on the 16th of March, to give an account of the outrage himself; and it would appear that both he and other witnesses were examined the same day. Jenkins carried his ear about with him wrapped in cotton, to show to those to whom he related the fact, and the indignation was intense. He was asked by a member how he felt when he found himself in the hands of such barbarians, and he replied, "I recommended my soul to God, and my cause to my country." The worthy skipper had probably been crammed with this dramatic sentiment by some of his clever Parliamentary introducers; but its effect was all the same as if it had been a genuine and involuntary expression of his own mind. Researches made at the Admiralty in 1889 proved that he really had lost an ear. Nevertheless, the whole army was dead beat and in the most deplorable condition when they entered Carlisle on the morning of the 19th. As the enemy did not appear, they rested that day and the following night, when they set forward again, leaving a fresh garrison. Cumberland was soon up before the walls, and they fired vigorously at him; but he sent off to Whitehaven and brought up six eighteen-pounders, with which, to their dismay, he began to play on their crumbling walls on the 29th. Next morning they hung out a white flag, and offered to capitulate; but Cumberland would hear of no terms except their surrendering on condition that they should not be put to the sword. At three o'clock in the afternoon both town and castle were surrendered, the garrison being shut up in the cathedral, and a guard set upon them. On the 3rd of January the Duke of Cumberland left the command to General Hawley, and hastened back to London, being summoned to defend the southern coast from a menaced landing of the French. In pursuance of this plan of the campaign, Prideaux and Johnson arrived before the fort of Niagara in the middle of July, which they found very strong, and garrisoned by six hundred men. Prideaux was soon killed by the bursting of a shell, but Johnson continued the siege with great ability, having to invest the fort on one hand, whilst he was menaced on the other by a mixed body of French and Indians, one thousand seven hundred in number, who came to relieve the fort. The attack upon him commenced with a terrible war-whoop of the Indians, which, mingling with the roar of the great cataract near, made the most horrible din imaginable. But this did not disconcert the English and their savage allies, who received them with such steady courage, that in less than an hour they were put to the rout in sight of their own garrison, and pursued for five miles with dreadful slaughter. The garrison thereupon capitulated, remaining prisoners of war. There, however, Sir William Johnson's career stopped. From various causes, not foreseen, he was not able to advance beyond the Ontario to unite with Amherst. That general had fully succeeded in taking Ticonderoga and Crown Point, but he found the French so strongly posted on an island at the upper end of Lake Champlain, that he was compelled to stop and build[134] boats to enable his army to reach and dislodge them; and it was not till October that he was ready to proceed, when he was driven back repeatedly by tempests, and compelled to go into winter quarters. "Some of you find Lieut. Bowersox, and bring him here," said Capt. McGillicuddy, sitting up, and beginning to twist a handkerchief around his thigh, to form a tourniquet. "Lieutenant, you all right?" The old man mounted into the seat, gathered up the rope lines, and chirruped to the horse to start. He hitched forward cautiously a little farther, to where he could peer through the bushes, being exceedingly wary not to repeat his opponent's mistake, and set their tops in motion. A rock protruding through the ground in front of him made an opening through which he could see, and also afforded a rest for his musket. He looked sharply, and at length was rewarded by seeing the gun-barrel come out by the side of the barked willow, rested on a bare limb, and apparently aimed at the hill beyond. He took a long breath to steady his nerves, stretched out his legs to make himself more at ease, pushed his musket forward until he got exactly the right poise, aimed about nine inches below the level of his opponent's gun-barrel, and a little to the left, drew his bead down to a hair's nicety in the hind sight, and pulled the trigger just as the rebel sharpshooter did the same. Both muskets seemed to flash at the same moment. The rebel sprang up through the willows and fell forward on his face. There was a vague hint that he had seen the face somewhere, but he dismissed it, then settled himself, and, busy with his own thoughts, pressed his face against the window, and tried to recognize through the darkness the objects by which they were rushing. They were all deeply interesting to him, for they were part of Maria's home and surroundings. After awhile the man appeared temporarily tired of billing and cooing, and thought conversation with some one else would give variety to the trip. He opened their lunch-basket, took out something for himself and his companion to eat, nudged Shorty, and offered him a generous handful. Shorty promptly accepted, for he had the perennial hunger of convalescence, and his supper had been interrupted. It was their regiment—the 200th Ind.; it was made up of the same companies, with the great majority of the men the same, but it was very far from being the 200th Ind. which crossed the Ohio River in September, 1862. "I should say he had a mighty strong breath, Monty," Shorty interrupted. He liked to break in on Monty's heroics. "Excuse me from havin' a 12pounder breathin' around me." "Yes, but d?an't m?ake him angry—he might beat you." "I used to be in the fancy," said the minister, "but five years ago the Lord challenged me, and knocked me out in the first round." "We shall talk further," said Holgrave: "in the mean time, we must consult for your own safety. If your father was a villein of this barony, it is not likely that the old steward, or the new one—the fiend Calverley—should forget you; and——"
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