I.I ntroduction of the product
S YJ ries Quick-acting oil pressure relay is a new type of pressure protection relay for protecting
the safety of oil tank of transformers, power capacitors, reactors, which is designed by Shenyang Keqi Electrical Equipment Co., Ltd.. It measures according to changing velocity of internal pressure of fuel tank. When the rising speed of pressure in fuel tank exceeds 2~6kPa/c, the quick-acting oil pressure relay will start up. Responding time will be shortened along with the ri of pressure and its characteristic curve of action, e Figure 1.
W hen acting, the added value of pressure, that is, rising speed multiplies responding time, shall
be not more than 25kPa. For example, when the pressure ris at the grade of 500kPa/c, its action respon time shall be less than 0.05 cond, and when the pressure ris at the grade of 100kPa/c, its action respon time shall be less than 0.25 cond (See Figure. 1).
T he characteristic of this relay is to facilitate the transformer to keep fuel tank pressure in low
pressure region and give an alarm and cut off power in ca of malignant accident. Compared to previous regular gas relay, it is characterized by reliability and quickness, which can greatly reduce the loss caus by the malfunction of the transformer. When using this product, it is recommended that SYJ 9Quick-acting oil pressure relay connected to the trip.
T his product can realize to nd out electrical signal in two ways, one shall be connected to trip
paragraphand the other shall be connected to computer system.
)
+20%-20%
Fig. 1
2013 奥斯卡II.S ymbol and its meaning
T w o-w a y s ig n a l (n o n-m a r k m e a n s o n e w a y sig n a l)
S e n sitiv ity in d e x(k P a)
D ia m e te r o f p ip e lin e s(m m)
S e r ia l n u m b e r o f d e s ig n
R e la y
Q u ic k-a c tin g o il p r e ss u r e
For example:
S YJ9-50-25（S）indicates that butterfly valve diameter matched with transformer and reactor isΦ50ｍｍ, nsitivity index is 25kPa, two-way signal quick-acting oil pressure relay.
III.W orking Principle
T his product divided into two parts with a parated plate, one is oil cavity and the other is electric room. T here is a big isolating corrugated tube in the oil cavity, and the big corrugated tube connected with micro force corrugated tube, and they are compod a al cavity. T his cavity is connected with an electric room through microtubule balancer. T here is a balance spring in big corrugated tube; this is the part that compos the pressure gradient and displacement transfer of the SYJ ries Quick-acting oil pressure relay. I t is that when the oil-pressure incread abruptly, the al cavity will shrink, and the internal pressure is incread, it will impel the elongation of the sli
ght pressure corrugated tube, and the elongation of the displacement will impel the action of the micro switch, and it will nd out an alarm signal. W hen the pressure incread slowly, the air pressure that in the al cavity is incread slowly, the incread pressure is relead to the electric room through microtubule balancer. I t makes the action of slight pressure corrugated tube decread slower, or so much as did not have displacement. O nly the pressure increa gradient
reaches to the certain value, it can get result of the action. A nd the more the pressure increa
gradient, the shorter of the time that the action affect.
IV.S cope of u and the technical parameter
病梅馆记翻译
1. Scope of u
(1) I t is indicated for the oil-immerd transformer, reactor and other airtight oil-immerd
electric room;
(2) E nvironmental requirement: -30℃—+50℃;
(3) R elative humidity: when temperature is +20℃, it is no more than 95%。
2.Technical parameter
T he electricity performance parameter of signal switch is as follows:
Category voltage V oltage Resistance Load Inductive Load
Φ=0.4)
(cos
3 AC 220 5
=7ms)
0.1(T
DC 220 1
(2) T he electrical insulation properties: among the micro switch terminal themlves or the
current carrying part to the ground should be endure the line frequency voltage for 2000v, and
it should be persistence for 1 min, and the insulator does not have the phenomena of give off
heat, puncture, scintillation;
why so rious音译(3) A nti vibration ability: when the vibration frequency is 4—20Hz(sine wave) and the
acceleration is 2—4 g, the tip do not action.
(4) L evel of shell protection is accord with IP55 in the standard of GB4208.
V.E xternal dimension (e figure 2)
VI.S tructure and Features
1.Structure:
T he shell of relay is made of high strength aluminum alloy ction material through the machine
work. Isolating corrugated tube is t up in the inner side; it parated the electric room and the oil cavity. T he micro switch and the balancer are t up in the electric room. T he oil cavity of this product has air relief cock and waste outlet, (the air relief cock also as detection interface on site regularity. See figure 2), when you t up the air relief cock, the placket should be placed upward or horizon.
Figure2. The overall dimension drawing of quick-acting oil pressure relay
2.Features
(1) T his product is made of allegation aluminum ction, and has no hidden trouble of leakage
and rupture.
(2) T he vertical distance of the products between the mounted position and tiptop oil level can be
choo to located among 0—6 m
(3) O peration factor is precision and true
三角公式(4) T his product provides the detector t, and the routine online examination is convenient; M ay
provide the two-circuit electricity alarm system, and it is advantageous for the computer monitoring management.
VII.T he recommend connection diagram of external wire of SYJ ries Quick-acting oil pressure relay. See figure 3
no matter
迤逦
Single-circuit alarm Two-circuit alarm
Figure 3 Wiring diagram
Note: I n the figure, K1 and K2 are individual swifts of alarm power supply, K1 connects to the posts 1, 2, and 3; K2 connects to the posts 4, 5, and 6.
K1: it is normally clod contact between 1 and 2, which is ud for indicating normal condition, and it is normally open contact between 1 and 3, which is ud for alarm or
tripping alarm;
叉子的英语
K2: it is normally clod contact between 4 and 5, which is ud for indicating normal condition, and it is normally open contact between 4 and 6, which is ud for alarm or
tripping alarm.
VIII.W ay to connect install and maintenance with transformer
出国教育
1.D uring transformer transportation, it does not allow installing SYJ ries quick-acting oil
pressure relay on the transformer, and do not let the relay be hit;
2.T he SYJ ries quick-acting oil pressure relay must be installed through a butterfly valve of
Ф50mm or Ф80mm on the sidewall of transformer oil tank or the ca lid，the vertical distance from its installation position to the oil level in the oil storage tank is H, as shown in Figure 5, if H is more than 3m, plea give a special indication when ordering;
3.W hen transformer for Forced-Oil-Air circulation cooling, the relay should not be installed
approaching the facing area of oil pipe end, in order to avoid mal-operation of the relay in running and at stop of oil pump.
4.I t is advisable that install SYJ ries quick-acting oil pressure relay levelly with the sidewall
of oil tank（also may install on the oil tank cover. A ir relief cock is in the upper （size for flange joining e Figure 2）.
5.W hen finished the installment of SYJ ries quick-acting oil pressure relay, connect signal石家庄留学机构
line, and open the butterfly valve which connected with it.
6.A fter SYJ ries quick-acting oil pressure relay is installed correctly, the butterfly valve being
at its open condition, dismounts the protective cap from air relief cock, dismount the transparent one end of connecting pipe of test joint from the air pump external connection, put another end inrt the quick connection plug of test cap and clockwi turn the test cap into air relief cock, until the few oil streams out, dismount the test cap, scours the output port, then well install protective cap (e figure 4).
