Product Features

JWXC-1700 type infinite relay (hereinafter referred to as relay) is used as a general relay in the signal circuit.

 

Features

1. The relay is a heavy elastic DC electromagnetic relay, which uses the principle of "constant gravity" to force the moving and closing contacts to open when the coil is de-energized.

2. It adopts silver-silver oxide contact, which has the characteristics of strong anti-adhesion and low contact resistance.

3. The magnetic circuit adopts electromagnetic pure iron material with small residual magnetism, and installs the stop piece at the closed position of the armature and the iron core to ensure the minimum air gap of the magnetic circuit, prevent the ferromagnetic parts of the magnetic circuit from magnetization, and ensure the reliable fall of the relay.

4. The contact system is composed of ordinary contacts, with eight groups of common contacts for switching on and off.

5. The rated voltage of the relay is DC 24V.

 

Applicable environment

The applicable environment of the relay is:

a) Ambient temperature: -40℃~+60℃;

b) Relative humidity: not more than 90% (temperature +25℃);

c) Air pressure: not less than 70kPa (equivalent to an altitude below 3000m);

d) Vibration: vibration is not more than 15Hz, amplitude is not more than 0.45mm;

e) Working position: horizontal;

f) There should be no harmful gas causing explosion hazard around, and good dust-proof measures should be taken.

 

Mechanical properties

Number of contact groups: 8QH;

Identification pin number: 11, 51;

Contact gap: not less than 1.3mm;

Pallet gap: not less than 0.35mm;

Contact pressure: the dynamic contact point is not less than 250mN; the dynamic disconnection point is not less than 150mN;

Contact uniformity error: not more than 0.20mm.

 

Electrical characteristics (at 20c)

Coil resistance: 850 (1±10%) Ω×2

The coils are connected in series, connect 2, 3, use 1, 4;

Rated value: DC24V;

Magnetizing value: DC67V;

Working value: not more than DC16.8V;

Release value: not less than DC3.4V;

Reverse working value: not more than DC18.4V;

Contact resistance: not more than 0.05Ω.

 

Insulation withstand voltage

Under the standard atmospheric conditions of the test, the absolute resistance of the relay should not be less than 100MQ.

Under the condition that the air pressure is not less than 86kPa (equivalent to the altitude below 1000m), the insulation withstand voltage of the relay should be able to withstand AC sine wave 50Hz,

2000V rms voltage, there should be no breakdown flashover after 1 min, and the voltage during repeated test should be 75% of the original test voltage.

 

Product electrical life

The relay contacts are connected to DC24V1A resistive load; its electrical life is 2×106 times.

 

Structural characteristics

Infinite relay is the typical structure of AX series relay, which is composed of electromagnetic system and contact system. The electromagnetic system includes coils, iron cores, vehicle irons and armatures. The coil is installed horizontally on the iron core, and is divided into a front coil and a back coil. The use of dual coils is to enhance the flexibility and flexibility of the control circuit, which can be controlled by a single coil or a series of double coils according to the circuit needs. The Yantie is fastened to the blade of the iron by the butterfly-shaped steel wire, which is flexible in movement. There is a heavy hammer in the transmission part of the armature to ensure that the relay armature returns reliably by gravity. The number of weights installed is determined by the structure of the relay contact system, and should be able to ensure the reliable release of the relay. A stop piece is installed at the closed position of the armature and the iron core to ensure the minimum air gap of the magnetic circuit of the relay, prevent the ferromagnetic parts of the magnetic circuit from magnetizing, and ensure that the relay falls reliably. The iron core, vehicle iron and armature of the relay are made of electromagnetic pure iron, which has high magnetic permeability and small remanence.

 

Executive standard

GB/T 7417-2010 "Railway Signal AX Series Relay"

 

Faults and troubleshooting methods

The analysis and elimination methods of the relay contact without output are as follows:

(1) Make sure that the relay and socket should be reliably pl ed in;

(2) Check that the relay should not be mechanically blocked. If foreign matter in the relay blocks the armature, the armature cannot work reliably (forward rotation) or release (reverse rotation), and the contacts cannot be reliably contacted;

(3) Check that there should be no foreign matter between the contacts, there is foreign matter between the contacts, and the contacts cannot be reliably contacted;

(4) Check that the contact resistance of the relay contact should not be too large.

 

Dimensions

Relay: 165mm×49 mm×163mm (length×width×height)

Socket: 157mm×48mm×22 mm (length×width×height)

 

Installation method

The relay socket is installed on the combination frame (cabinet) with bolts, and the relay is inserted into the socket horizontally and clamped with a hanging spring.

JWXC-1000/7 type relay identification pin numbers 11, 52; JWXC-1700 type relay identification pin numbers 11, 51.

 

test method

Standard test conditions

Temperature: +15C~+45℃

Relative humidity: 45%~75%

Air pressure: 86kPa~106kPa

Requirements for testing measuring tools, meters, and power supply

1) The accuracy of the measuring tool for measuring the shape and installation dimensions should not be less than 0.05mm; the accuracy of the feeler gauge should not be less than level 2; the measurement error of the force measurement should not be greater than 2%.

2) The accuracy of the DC voltmeter and ammeter used for testing should not be less than class 0.5, and the accuracy of the AC (50Hz) voltmeter and ammeter should not be less than class 1.

3) The power supply voltage should remain stable, and its fluctuation range should not exceed 5%. The DC power supply should be a DC generator, battery or AC full-wave rectifier power supply (except for special regulations, the ripple factor should not be greater than 5%). The waveform of the AC power supply should be a sine wave with a frequency of 50 Hz.