1. Contact failure
(1) The phenomenon that cannot be disconnected due to mechanical occlusion of the contact (the needle-like protrusion and pit formed on the contact bite each other), fusion welding, or cold welding.
(2) The contact of the relay is worn or unnecessarily interfered due to the lack of arc extinguishing devices or measures, or improper parameter selection.
(3) The fault of the contact cannot be divided and closed due to excessive load, or too small contact capacity, or change in the nature of the load.
(4) The fault of the circuit cannot be accurately interrupted due to the high frequency of the power supply or the excessive capacitance of the contact gap.
(5) The fault of re-breakdown of the contact gap occurs due to the voltage being too high or the contact opening distance becoming smaller.
(6) The phenomenon that the circuit cannot be turned on normally due to the increase of contact resistance and instability.
(7) Due to various environmental conditions do not meet the requirements and cause the error of contact work.
2. Coil failure
(1) The coil temperature rise of the relay exceeds the allowable value due to the change of ambient temperature (exceeding the specified value of technical conditions) and causes damage to the coil insulation: such as moisture causes a serious reduction in the insulation level, and corrosion causes internal disconnection or inter-turn short circuit.
(2) Due to the wrong coil voltage, such as the coil with a rated voltage of 110V is connected to the power supply voltage of 220V, or the AC voltage coil is connected to the DC voltage of the same level, the coil will be burned out immediately.
(3) The AC coil may burn out due to the coil voltage exceeding 110% of the rated voltage, or the operating frequency is too high, or when the voltage is lower than 85% of the rated voltage, the armature cannot be attached.
(4) When the AC coil is connected to the voltage, the armature may not be closed and the coil burns out due to the failure of the transmission mechanism or stuck.
(5) During use and maintenance, the coil insulation may be damaged due to the bump of the tool, or the wire may be broken.
(6) Coil damage due to coil voltage exceeding 110% of the rated voltage.
3. Magnetic circuit failure
(1) In some DC relays, due to mechanical wear or damage to the non-magnetic gasket, the minimum air gap after the armature is closed becomes smaller, and the remanence is too large, resulting in the failure that the armature cannot be released.
(2) When the magnetic ring on the core of the AC relay is broken, or the armature and the pole surface of the core are rusted or impurities invade, it will cause the armature to vibrate and produce noise.
(3) In the E-type core of the AC relay, when the air gap of the center column disappears due to the wear of the cores on both sides, the armature will be stuck to the fault.
(4) The wear of the edges and corners and the rotating shaft leads to the failure of the armature to rotate or get stuck.
4. The parameters are unstable
A considerable part of the parts of the electromagnetic relay are riveted and matched, and the main problem is that the riveting place is loose or the bonding strength is poor. This kind of problem will make the relay parameters unstable, the parameters change greatly at high and low temperatures, and the resistance to mechanical vibration and impact is poor. The main reasons for this problem are the out-of-tolerance of riveted parts, improper placement of parts, unqualified quality of tools or inaccurate installation. Therefore, before riveting and welding, it is necessary to carefully check whether the tool and the riveted parts meet the requirements.
5. Damage to glass insulators
The glass insulator is made of metal prongs and glass sintering, which is easy to bend the prongs during inspection, assembly, adjustment, transportation and cleaning, and the glass insulators fall off and crack, resulting in air leakage and the insulation and voltage resistance are reduced, and the rotation of the prongs will also cause the displacement of the contact reeds, which will affect the reliable on-off of the product. This requires the operator of the assembly to handle with care during the whole process of relay production, the parts should be neatly arranged in the transfer box, and the pins are not allowed to be pulled or twisted when assembling or adjusting.
|
More on that
|
PILZ WILL BE EXHIBITING AT THERMPROCESS 2023
From June 12 to June 16, 2023, Pilz will be present at the THERMPROCESS trade fair in Düsseldorf, Germany, at booth B10 in Hall 9.
Germany Düsseldorf Thermprocess is Germany most important trade fair for industrial furnaces and heat treatment ...
|
|
Functions of Pilz
1. When the load exceeds the action current, the circuit will be automatically cut off;
2. After the circuit is automatically cut off, the panel indicator light is on, which is convenient for the judgment of the fault part;
3. After troubleshooting, press the red button at the bottom of the panel to restore the normal power supply;
4. For other reasons, the shell ...
|
|
Piermagnetic switches – an introduction to the functions of safety switches
1. When the load exceeds the action current, the circuit will be automatically cut off;
2. After the circuit is automatically cut off, the panel indicator light is on, which is convenient for the judgment of the fault part;
3. After troubleshooting, press the red button at the bottom of the panel to restore the normal power supply;
4. For other reasons, the shell ...
|
|
Pilmagnetic switches – what are the properties of safety switches?
The safety switch prevents personnel from entering the hazardous area until all safety conditions have been met
Provide bolt switches, safety magnetic switches, safety door lock switches, safety rope pull switches, emergency stop buttons, twisted chain interlocking switches, safety enable switches, safety limit switches, explosion-proof open...
|
|
Pilz: Determined by the harmonised service provider of EU standards
EU standards have no legal significance in themselves. However, it acquires legal status after publication in the Official Journal of the European Union or citation in domestic laws and regulations. The publication of these harmonized standards will result in a "presumption of conformity". As a result, users who adopt the standard can assume that their actions are in compliance with laws and directives. If it happens ...
|
|
Pilz is one of the Industry 4.0 Top 100
Allianz Industries 4.0 awarded Pilz the title of "Top 100 Industry 4.0 in Baden-Württemberg".
Allianz Industry 4.0 is a network initiated and funded by the Baden-Württemberg Ministry of Economic Affairs. Every year, Allianz provides support for those who have the ability to work...
|
|
Pierre magnetic switch – the function of the disconnector
1. After opening, establish a reliable insulation gap to separate the equipment or line that needs to be overhauled from the power supply with an obvious disconnection point to ensure the safety of maintenance personnel and equipment.
2. According to the operation needs, change the line.
3. It can be used to divide and combine small currents in the line, ...
|
|
Pilz I.A.M. protects data and employees
How do you grasp the issues of employee protection, responsibility protection, work efficiency, and data protection? How can you improve quality and at the same time prevent machines from being tampered with? How can data and employees be protected in equal measure?
Through I.A.M. (Identification and Access Management) "...
|
|
Pilz was invited to attend the China Equipment Manufacturing Industry Youth Safety Expert Forum
Recently, the inaugural meeting of the Youth Safety Expert Working Committee of China Machinery Industry Safety and Health Association and the first China Equipment Manufacturing Youth Safety Expert Forum were held in Chengdu, Sichuan.
|
|
Peel magnetic relays – the five major classifications of relays
1. Classification by use
In terms of use, the classification of relays can be divided into two types: control relays and protection relays.
In the meantime: thermal relays, overcurrent relays, and undervoltage relays are all protective relays. And moment relays, speed relays, intermediate relays ...
|
|
Pilz safety switches – wiring methods for safety switches
1. The switch binding post is generally marked with L, L1, L2. When the L end enters the line, L1 and L2 have one end and L on, and after pressing the switch, the other end of L1 and L2 is connected to L.
2. Peel the thread with diagonal pliers first, and be careful not to leave too long the thread to avoid touching.
3. To the left ...
|
|
Safety circuit requirements for Peel magnetic relays
1. When the emergency stop is lifted, the machine cannot be suddenly restarted
2. In case of failure of the safety circuit of the machine, the power supply of the machine can be stopped
3. When the safety circuit fails, the machine can no longer be started
Confirm the safety of the transmission such as safety switches, light curtains, etc.
|
|
Classification of Pilz safety relays
Safety relays from PNOZ – a classic
In 1987, Pilz was a milestone in the development of the world's first emergency stop safety relay to protect people and machines. PNOZ has also become synonymous with safety relays and is used by customers all over the world. The full range ...
|
|
Peel magnetic relays - what are the connection methods of relays?
1. 3-pin relay wiring
The common 3-pin relay is the car horn relay.
No. 1 is the contact terminal, which connects the load;
No. 2 is the common terminal between the contact and the coil, which is connected to the power supply;
No. 3 is the coil terminal, which connects the button switch (such as the horn on the steering wheel).
|
|
Top 5 reasons to choose myPNOZ from Pilz
Pilz's modular safety relay myPNOZ has received a lot of attention and acceptance since its introduction. It has been nominated for the Hermes Award, the Germany Innovation Award (GIA) and the Red Dot Design Award. This safety app, which can be customized and mass-produced according to user requirements, can be customized according to user requirements.
|
|
Pierre Switches – Requirements for securing safety switches
The fastener itself needs to be reliable and stable enough.
It can be removed with specialized tools, such as hexagon screws, star screws, etc. Phillips/slotted screws are not recommended, as in some cases these screws can be easily punched with nails or carry-on equipment.
|
|
Pilz safety switches – how to install safety switches
1) The installation of the switch panel should be after the installation of the lamp, and the switch must be connected in series on the live line; Application of sealed or protected sockets in wet locations; The allowable deviation of the verticality of the panel is not more than 1mm; The gap between the panels installed in rows should not be greater than 1mm.
2) Where the socket must be facing the switch panel ...
|
|
Peel magnetic relay – the difference between a transistor and a relay output PLC
1. The overload capacity of the transistor is less than the overload capacity of the relay
In general, in the case of a large inrush current (e.g., bulbs, inductive loads, etc.), the transistor overload capability is smaller, and more derating is required.
2. Under the condition of rated operation, the relay has the number of actions ...
|
|
SIX POINTS FOR SAFETY RELAY REPAIR IN PILZ
PILZ PILZ SAFETY RELAYS ARE THE MAIN COMPONENTS FOR CONTROL CIRCUITS AND MONITORING AND PROTECTION SYSTEMS FOR ELECTRIC LOCOMOTIVES. WHEN THE ELECTRIC LOCOMOTIVE IS RUNNING, WHEN THE MOTORS, ELECTRICAL APPLIANCES OR CONNECTION LINES IN THE MAIN CIRCUIT AND AUXILIARY CIRCUIT FAIL, THE FAULT CAN BE REPLACED BY THE PILZ SAFETY RELAY OF THE CORRESPONDING MONITORING AND PROTECTION SYSTEM.
|
|
Pilz: Evaluation of AGV application scenarios
As one of the core equipment of intelligent factory logistics, mobile handling robots play an important role in the factory logistics automation system. The AGV is equipped with an automatic guided vehicle, which can ensure that the system can be flexible and changeable along the ...
|
|
Contact
working hours
