6KVJFEM电机引接线

Jiangsu Chunchen cable limited company production of JFEM motor wiring, in power transmission lines (ground) wires, the sag observation, marking and line operation error, and line tackle rotation is not flexible, strain tower tilt and deflection and other reasons, often encounter Guide (to) sag line after tightening does not comply with the relevant requirements, need to tighten or loosen the wire length, sag adjustment. Because of the large cross-section of the wire is now set up, the use of compression type internal tension wire clip plus adjustment plate fixed wire. When the arc is more than the specified error, the amplitude is not large, you can adjust the adjustment plate. Calculated in the adjustment of prior to wire line adjustment, in order to make the adjustment of scientific and orderly controlled. JFEM motor wiring，6KVJFEM电机引接线

A simple algorithm for the adjustment of the 1 ground conductor sag

Yongkang city is located in the ground, transmission lines are generally not more than 20 km, wire hanging point height h < 10L, negligible influence of hanging point elevation angle. The rules for information from the network span: JFEM motor power distribution equipment wiring

Type in Lp - tension section represents the span (m); information from: transmission and distribution equipment

Li: the horizontal span I file (m).6KVJFEM电机引接线

The sag of the observation file is from the transmission and distribution network

Type FC - sag of observation file (m);

LC observation span distance (m);

FP, on behalf of the sag span (m).

When the Li sag is fi, the line length increased by file

The gear sag is line length f 'I increase for

The above two type 3 and 4 as the difference of the file from F 'I to fi length increased as a source of information:

The type 1, type 2 into 5, the tension section and adjusted to adjust the sag length increment

The amount of line tension section while adjusting for adjusting sag for JFEM motor wiring

The relationship between the observation file and the formation of Zhang Rong Zhang is an information source:

Type 7 is positive, the length of incremental reduction, adjusted to reduce the sag; negative, line length increases, the adjusted sag increases. letter

2 calculation examples，6KVJFEM电机引接线

110 kV Fang Li line 9# ~ 14# tension section is divided into 265 m, 258 m, 270 m, 257 m, 273 m total of five strain Duanchang 1323 m, representing the span of 265 m observation file for 11# ~ 12# 270 M. The sag standard value of the observation file is 4.48 M. After installation the three-phase measured sag is fA = 4.37 m, fB = 4.65 m, fC = 4.49 M. Although the phase conductors of error sag in the standard requirements within, but the fB - fA = 280 mm, beyond GBJ#233-1990 seventh - 3 - 6 110 kV and 200 mm sag allowable deviation requirements, and therefore should be adjusted in A sag. The relevant data into the 7 calculation:

S = 8 x 2652/3 x 2704 (4.372 - 4.482) x 1323

= 0.04666 x (19.097 - 20.07)

= -0.045 (m) information please visit: transmission and distribution equipment network

The above results show that the A should be phase sag from 4.37 m to 4.48 m, to increase the length of 0.045 M. Because the adjustment range is adjusted by PB-7 small adjustment plate. The specific approach is to use adjustment plate, wire elongation of two hole distance, even if the A phase line length increased by 50 mm, fA = 4.48 M. Information

3 concluding remarks

This paper derives a formula 6 and 7, calculate the universal line adjustment amount of sag adjustment on overhead transmission lines in the. By calculating the line adjustment and combination adjustment plate, can do not need to remove the clamp and re tight line, the sag standard, adjust the sag to save time to.

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