NAYJFH型PT二次压降负载在线测试装置

 nayjfh型pt二次压降负载在线测试装置

nayjfh pt secondary load on - linetesting device

功能简介

⑴ 能实现三相三线，三相四线、单相全自动测量；

⑵使用工程塑料机箱，结识耐用，有效保障测试人员及系统安全；

⑶ 仪器具有量程自动切换功能，保证测试精度；

⑷采用电子式原理线路结合dsp技术是使测试稳定性好，抗干扰能力强；

⑸测量完毕，自动计算和负荷相关的各项参数，便于客户分析和试验。

⑹ 采用大屏幕中英文液晶显示，所有操作均由中英文菜单提示；数据具备掉电存贮及浏览功能，能与计算机联机传送数据。

⑺采用大容量7.2v11ah锂电池供电，对测试回路不产生任何影响，避免系统出现保护的情况。同时在现场无供电电源的情况下使用。

⑻二次压降负载测试，采用钳型电流表采样电流，不需要断开二次回路。可以实现不停电在线测量。自动切换量程：测量过程中可以根据测试对象数值的不同切换到不同的位置，使测量精度和显示位数得到保证。

⑼工作时间可以长达24小时。

⑽附有轻巧充电器，方便测量，在电池电量不足的情况下可以外接充电器测量。

⑾ 仪器体积小，重量轻。

⑿宽阔的二次工作电流/电压范围。在50ma的工作电流下，能分辨1mΩ的电阻和电抗，能测试二次额定电流为5a的s级电流互感器的在线实际负荷；在5v的工作电压下，能分辨0.001ms的电导和电纳。

⒀能存储480组测量数据，断电后能保持十年。

⒁中英文界面大屏幕显示，带有rs-232通讯接口。

主要技术指标

1.环境条件

1).温度：－5°c～40°c

2).相对湿度：<95%（25°c）

3).海拔高度：<2500m

4).外界干扰：无特强震动、无特强电磁场

2.二次压降负载测试时仪器主要技术指标

1).测量范围：比差：0.001%～19.99%角差：0.01’～599’

2). 分 辨率：比差：0.001%角差：0.01’

3). 仪器基本误差

 ——dx=±(1%×x+1%×y±2个字);

 ——dy=±(1%×x+1%×y±2个字)。

 2个字——仪器的量化误差

4).电压表头准确度：0.5%

5). 工作范围

 ——电压：(50～120)v

6).仪器指示动作值(提示错误)

 ——误差：比差大于20%或角差大于600’。

 ——电压：电压<2.0v。

3. pt二次负荷测试时仪器主要技术指标

1). pt二次负荷测试

 ——导纳测量范围:0.1ms—50.0ms

 ——导纳测量准确度:

 ——二次电压（50v－120v）

 dx=±(1%×x+1%×y±2个字)

 dy=±(1%×x+1%×y±2个字)

 2个字——仪器的量化误差

注意：测量值在0.2ms以下时，测试电压应保持在50v以上，同时注意钳表的穿心导线保持居中。此时仪器量化误差为5个字

2).电压表头：0.5%

4. ct二次负荷测试时仪器主要技术指标

 ——阻抗测量范围：0.1Ω—50.0Ω

 ——阻抗测量准确度：

 电流表头：1%

main features

⑴ to achieve three-phasethree-wire, three-phase four-wire, single-phase automaticmeasurement;

⑵ use of engineering plasticchassis, get to know durable, effective protection of testpersonnel and system security;

⑶ instrument has a range ofautomatic switching function to ensure that the testaccuracy;

⑷ the use of electronic principlesof the line with dsp technology is to make the test stability,anti-interference ability;

⑸ measurement is completed, theautomatic calculation and load-related parameters, to facilitatecustomer analysis and testing.

⑹ using large-screen lcd displayin english, all operations by the chinese and english menu prompts;data with power-down storage and browsing capabilities, can senddata with the computer on-line.

⑺ 7.2v11ah lithium battery withhigh-capacity power supply, the test circuit does not have anyeffect, to avoid the system appears to protect the situation. whilein the field without power supply in the case ofuse.

⑻ second load test, usingclamp-type ammeter sampling current, do not disconnect thesecondary circuit. can achieve non-blackout on-line measurement.automatic switching range: the measurement process can be differentaccording to the test object to switch to a different location, sothat measurement accuracy and display digits areguaranteed.

⑼ working hours can be up to 24hours (the longest).

⑽ with a lightweight charger tofacilitate measurement, in the case of battery power can be anexternal charger measurements.

⑾ e, small size, lightweight.

⑿ wide secondary operating current/ voltage range. in the 50ma operating current, can distinguish1mΩ resistance and reactance, can testthe secondary rated current of 5a s-class current transformeron-line actual load; 5v operating voltage, can distinguish between0.001ms conductance and susceptance .

⒀ can store 480 sets ofmeasurement data, power can be maintained for tenyears.

⒁ chinese and english interfacelarge screen display, with rs-232 communicationinterface.

main specifications

1. environmental conditions

1). temperature: -5c ~ 40c

2). relative humidity:<95%(25c)

3). altitude:<2500m

4). external interference: no specialstrong vibration, no special strong electromagneticfield

2. secondary pressure drop teste, the main technical indicators

1) measuring range: difference: 0.001%to 19.99% angle difference: 0.01 'to 599'

2) resolution: difference: 0.001% angledifference: 0.01 '

3) basic error of theinstrument

 - x = (1% x + 1% y2words);

 - y = (1% x + 1% y2words).

 2 words - error ofthe instrument

4). voltage meter accuracy:0.5%

scope of work

 - voltage: (50 to 120)v

6). instrument indicates the actionvalue (prompt error)

 - error: the difference is greaterthan 20% or the difference is greater than 600 '.

 - voltage:voltage<2.0v.

3. pt secondary load test e, themain technical indicators

1). pt secondary load test

 - admittance measurement range:0.1ms-50.0ms

 - admittance measurementaccuracy:

 - secondary voltage(50v-120v)

 x = (1% x + 1% y2words)

 y = (1% x + 1% y2words)

note: when the measured value is lessthan 0.2ms, the test voltage should be kept above 50v, and payattention to the centripetal wire of the clamp. at this point theinstrument error of 5 words

2). voltage meter head: 0.5%

4. ct secondary load test e, themain technical indicators

 - impedance measurement range:0.1Ω-50.0Ω

 - impedance measurementaccuracy:

 current meter head: 1%