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


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JJJC4 AC enhanced contact relay
  • Product Details

Product Usage

The JC4 AC enhanced contact relay is used as a signal track power supply supervisory relay in the power supply screen of the small station.


1. JJJC4 and JJJC7 type relays are AC 220V heavy elasticity reinforced contact electromagnetic relays. The JJJC5 type relay is an AC 24V heavy spring force type reinforced contact electromagnetic relay.

2. The relay magnetic system is a clap-on AC magnetic system, which is composed of an iron core, a coil and an armature.

3. The use of silver-silver oxidation requires contacts, which has the characteristics of strong anti-adhesion and low contact resistance.

4. The relay contact system consists of two parts: ordinary contacts and enhanced contacts. There are two groups of moving on and off switching ordinary contacts; the two sets of moving on and off switching enhanced contacts, the structure of the ordinary contacts is the same as the stepless relay, and the strengthened contacts Specially designed high-power contacts.


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

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

Installation method

The relay uses a power supply screen relay socket of type II. The relay is equipped with a locking device on the upper end of the socket, and the socket is installed on the relay frame. After the relay is inserted into the socket, the relay can be locked with a card board and locked with a hanging spring.

The identification pin numbers of JC4 relay are 14, 43; the identification pin numbers of JJJC5 relay are 13, 43;

The identification pin numbers of JJJC7 relays are 23 and 53.

Applicable environment

a) Ambient temperature: -40℃~+60℃;

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

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

Ordinary contact pressure: dynamic closing or positioning contact is not less than 150 contact groups: 2QJ, 2H;

Identification pin number: 31, 43;

Ordinary contact gap: not less than 1.3mm;

Strengthen the contact gap: not less than 5mm;

Ordinary pallet gap: not less than 0.35mm;

Reinforced pallet gap: not less than 0.1-0.3mm; mN; dynamic break or reverse contact point not less than 150mN;

Strengthen the contact pressure: the dynamic closing or positioning contact is not less than 400mN; the dynamic breaking or reverse position contact is not less than 300mN;

Contact uniformity error: not more than 0.20mm.

Electrical characteristics

Rated value: AC220V

Release value: not less than AC 70V

Working value: not more than AC175V

Coil resistance: 185 (1±10%) Ω

Single coil, use 1, 2

Time characteristics

The pull-in time is not more than 0.05S, and the return time is not more than 0.05S.


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 stepless relay and the rectifier relay should be five years;

The overhaul period of stepless enhanced contact relays, poled relays and biased pole relays should be three years;

The overhaul period of stepped reinforced contact relays should be one year.

Appearance inspection and performance inspection should be carried out after overhaul.

Insulation withstand voltage

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

Under the condition that the air pressure is not lower 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 1min, the voltage when repeating the test Should be 75% of the original test voltage value.

Product electrical life

The relay contact is connected to AC24V1.5A,

Resistive load; its electrical life is 1×106 times.


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


Email: jiangku@cnjkdq.cn

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