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German Railway Track Equipment (Zhejiang) Co., Ltd.


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JWXC-2000 Type Infinite Relay
  • Product Details

Product Features

JWXC-2000 type infinite relay is used as track repeating relay in AC counting code track circuit.

Product Usage

The JWXC-2000 type infinite relay is used as a track repeating relay in the AC counting code track circuit, and is used in a 12V DC circuit.


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, and there are two groups of ordinary contacts for switching on and off.

5. The rated voltage of the relay is DC 12V.

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: the vibration frequency is not more than 15Hz, and the 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.

Applicable characteristics Mechanical characteristics

Number of contact groups: 2QH;

Identification pin number: 12, 55;

Contact gap: not less than 1.2mm;

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 (+20℃)

Coil resistance: 1000 (1±10%) Ω×2

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

Rated value: DC12V;

Magnetizing value: DC30V;

Working value: not more than DC7.5V;

Release value: DC2.4V~DC3.2V;

Contact capacity: DC24V1A resistive load;

Contact resistance: not more than 0.05Ω.


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.

Relay identification pin numbers 11, 55.

Insulation withstand voltage

Under the standard atmospheric conditions of the test, the insulation 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,

1000V effective value voltage, there should be no breakdown flashover after 1min, and the voltage during repeated test should be 75% of the original test voltage.


Daily maintenance and maintenance items are as follows:

a) Keep the relay and socket clean;

b) Observe whether the relay operation status is normal;

c) The relay should be replaced in time for abnormal operating conditions and serious contact burnout.

Regular maintenance:

In the electrical life and life management cycle of the relay, the maintenance cycle of the infinite relay and rectifier relay should be five years; the maintenance cycle of the stepless enhanced contact relay, the poled relay and the biased pole relay should be three years; the maintenance cycle of the stepped enhanced contact relay The period should be one year. Appearance inspection and performance inspection should be carried out after the overhaul.

Product electrical life

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

After-sales service

From the date of delivery, the warranty period of infinite relays, rectifier relays (the warranty period of electronic components is one year), polarized relays and biased pole relays is 1 year, and the warranty period of infinitely enhanced contact relays and polarized enhanced contact relays Provide free maintenance services for the company during the one-year warranty period; for relays that exceed the warranty period, the company will provide life-long technical support based on the actual situation and maintenance items. The company provides life-long technical support to create conditions for users to master the use and maintenance methods of the relay.

a) Bad quality or damage due to transportation, storage, improper use, etc., and unsealed relays are not covered by the company's warranty;

b) If the user violates the technical requirements of this manual or fails to perform normal maintenance according to the maintenance manual during installation and use, the company does not assume any responsibility for the damage;

c) During the company's warranty period, if the products and parts of Shanghai Shenxin Railway Signal Equipment Co., Ltd. are unpacked without the company's authorization, the company will not bear any responsibilities arising therefrom;

d) Non-Shanghai Shenxin Railway Signal Equipment Co., Ltd. components that are assembled on the company's products without the company's consent cause product quality problems, and the company does not assume any responsibility for this;

e) The company does not assume any responsibility for damage caused by natural disasters, such as earthquakes, floods, lightning strikes, landslides and other irresistible causes;

f) The company does not assume any responsibility for damage caused by damage, theft or fire extinguishment, or damage caused by other reasons not caused by the company.


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German Railway Track Equipment (Zhejiang) Co., Ltd.


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